TW201031822A - Incorporated electric power storage system type wind power generation system - Google Patents

Abstract

In the wind power generation system having electric power storage system to mitigate the output variation, the energy loss caused by charging and discharging the electric power storage system is reduced by means of reducing electric power strength of the charging and discharging of the electric power storage system. The invention comprises a means of deciding the output possible range of next control circle through the maximum value and the minimum value of the output electric power of previous wind power generation device groups and the electric power storage system at a certain period; in the next control circle, a means of deciding the charging and discharging power strength of the foregoing electric power storage system and a power restriction instruction from any one or both wind power generation device groups in the foregoing output possible range by means of receiving the output electric power of the foregoing wind power generation device groups and the electric power storage system.

Description

201031822 VI. Description of the Invention: [Technical Field] The present invention relates to a wind power generation system including a power storage system and a wind turbine power generation system. [Prior Art] A group of wind power generators is used as a means for converting energy that can be regenerated in nature into electric energy. The energy source of the wind power generation device group is the energy of the wind that changes with time, and the generated power of the wind power generation device group also changes with time. The power system maintains the balance between power supply and demand by adjusting the power generated by large generators in response to the power demand. For this reason, as described in Non-Patent Document 1, when a group of wind power generators that are large power sources are interconnected to the power system in a large amount, there is a concern that the adjustment force is insufficient or the frequency fluctuation is expanded. In order to prevent such a situation, for example, as shown in Patent Document 1, the power storage system is provided to the wind power generation device group, and the generated power of the variable wind power generation device group_ is discharged and discharged to the power storage system. The means of power _ system power mitigation and so on are necessary. [Patent Document 1] Japanese Laid-Open Patent Publication No. 2007- 1 24780 [Non-Patent Document 1] "Review Results of Interconnection Possible Quantity of Wind Power Generation for Northeastern Systems", Tohoku Electric Power Co., Ltd., Japan, Heisei, September 16 On the 3rd, the website <11111^:]1110:%~评.1〇11〇11-epco.co.jp/oshirase/newene/04/pdf/hl8_temp0 1.pdf> 201031822 [Summary] Problem to be Solved by the Invention As shown in Non-Patent Document 1, the fluctuation of the power to be tempered is divided into a plurality of ranges by the fluctuation period. In particular, the change in the period from the minute to the 20-minute period, which is called the mid-cycle range, is related to the expansion of supply and demand imbalance and the increase in frequency fluctuations due to insufficient adjustment force. It is necessary to mitigate the power fluctuation of the frequency band in order to avoid the influence of the power fluctuation caused by such a medium cycle range. Specifically, it is desirable to suppress the output fluctuation range of the output power within a certain period (for example, 10% of the rated value of the wind power generation system) for a certain period of time (for example, within 20 minutes) from any time.

For example, as shown in Patent Document 1, a specific range is set for the average power generation of the wind power generation device group, and the battery is charged only when the range is escaped. The means of discharge. G. In the case of using the control method as described in the patent document 1, in order to alleviate the fluctuation of the cycle range as the target, the simple output target of the so-called average power generation is used, and there are doubts. There is an unnecessary charge and discharge of the battery which does not contribute to the fluctuation and slowness of the medium cycle range. In the charge and discharge operation of the battery, there must be a loss inside the battery. For this reason, it does not contribute to the change and relaxation of the charging and discharging of the battery, the loss is increased, and the natural energy cannot be utilized to the maximum extent. 虞-6 - 201031822 The present invention is aimed at a wind power generation system having a battery. The output variation of a specific frequency range is suppressed, and the power loss caused by charging and discharging of the battery is reduced. [Means for Solving the Problem] In the present invention, the output possible range of the next control period (control period) is determined by the maximum and minimum output power of the wind power generation device group and the power storage system in a predetermined period of time. In the next control period, the charge/discharge power and the power limit command of the battery of one or both of the batteries are determined within a range of the output power possible to satisfy the sum of the wind power generation device group and the power storage system of the power storage system. . Further, in the present invention, the wind power generation system has a charge rate command and a power limit command for determining one or both of the power storage systems in response to the power generation power prediction 气象 from the weather forecast. It is possible to suppress the fluctuation of the output power of the frequency band to be suppressed, and to reduce the loss of charge and discharge with the battery. [Embodiment] The wind power generation system of the present invention sets the future output of the next control cycle T2 by the maximum 値 and 201031822 of the sum of the output of the wind power generation device group and the power storage system in the past period T1. Possible range R. In the power storage system, the charging/discharging operation is performed when the generated electric power of the wind power generating device group escapes from the output possible range R or when the charging rate of the battery escapes from the target range of the charging rate. In the wind power generation system, the output possible range is updated every control period T2. The wind power generation system of the present invention is the minimum output and storage power of the wind power generation device group and the power storage system in the past by the specific period T1. @ Battery's rechargeable power to calculate the future power limit command for the next specific time T3; the wind power plant group consisting of one or more wind power generators is for the wind power generation group in the future at a specific time The power generation power is limited to the aforementioned limit command. [Embodiment 1] A first embodiment of the present invention will be described with reference to Fig. 1 to Fig. 17. A configuration of a wind power generation system to which the present invention is applied will be described with reference to Fig. 1 . The wind power generation system of the present invention is constituted by a wind power generation device group 1, a power storage system 2, an upper controller 3, and an interconnection transformer 4. The wind power generation system is interconnected to the power system 5 to transfer the generated power to the power system 5. At the interconnection point of the wind power generation device group, a power meter 6 for measuring the generated power PW of the wind power generation device group is provided. Further, a power meter 7 for measuring the charge/discharge power PB of the power storage system is provided at an interconnection point of the power storage system. Moreover, regarding the output power ps, PW, and -8 - 201031822 PB of the wind power generation system, the relationship of the mathematical formula 1 is established.

(Mathematical Formula 1) PS = PW + PB The wind power generation device group 1 constituting the wind power generation system will be described below. The wind turbine generator group 1 is composed of one or more wind power generators 1-1-1, 1-1-2, ..., l-1-n, and SCADA1-1. 0 SCADA1-1 is a task for collecting operational status of a wind power plant group or operation information such as power generation. At the same time, SCADA1 -1 is the upper controller, and receives the limit command PLC of the generated power of the wind power generation group 1, and the sum of the generated powers of the respective wind power generation devices 1-1-1.....l-1-n Each of the power limitation commands PLC1, PLC2, ..., PLCn is applied to each of the wind power generators 1-1-1, ..., 1 -1 - η in such a manner as to become PLC or less. The wind power generators 1_1_1.....1·1-n are described using FIG. 2, FIG. 3, FIG. 4, and FIG. Fig. 2 is a view showing a state of a wind power generator. In the wind turbine generator, the blades 1-1-1-1 are used to receive wind, and the wind energy is converted into swing energy. The gyroscopic energy is transmitted to the generator 1-1-1-4. In Fig. 1, as a generator 1-1-1, a direct current type synchronous generator 1-1-1 is disclosed. The stator of the DC-excited synchronous generator 1-Bu 1-4 is interconnected to the system through an AC/DC converter 1-1-1-5 and a converter 1-1-1-6. Moreover, the return rotor of the DC-excited synchronous generator 1-1-1-4 is also connected to the system through the excitation device 1-Bu-1, and the DC excitation current is adjusted by controlling the excitation device 1-1-1-9. The way of strength and weakness, come to -9- 201031822 to achieve variable speed operation. Fig. 3 shows an example of a wind power generator using an AC-excited synchronous generator 1-1-1 a-4 as a generator. Further, Fig. 4 shows an example of a wind power generator using a permanent magnet type synchronous generator l-1 - lb-3 as a generator. The wind power generator group of Fig. 2, Fig. 3, and Fig. 4 can be operated at a variable speed by adjusting the inclination angle of any of the power converters and the blades. Further, in these wind power generators, the power generation power can be limited to a specific value or less by a combination of the control of the inclination angle and the control of the power converter. Further, Fig. 5 shows an example of a wind power generator using a reference generator 1-1-1 c-4 as a generator. The wind power generation device shown in Fig. 5 is directly connected to the power system without passing through the stator and power converter of the induction generator 1-1-1 c-4. The wind power generator using the induction generator 1-l-lc-4 can also limit the generated power to a certain value or less by controlling the tilt angle. The wind power generator group 1 is configured by using any of the types of wind power generators as shown in Figs. 2, 3, 4, and 5 or a combination of these. Next, the power storage system 2 constituting the wind power generation system will be described. Power storage @ System 2 is constituted by one or more power storage devices 2-2-1, 2-2-2..... 2- 2-m. Each power storage device will be described with reference to FIG. 6 . The power storage device 2-1-1 is composed of a plurality of secondary batteries 2-1-1-1, an inverter 2-1-1-2, an interconnection transformer 2-1-1-3, and a circuit breaker 2-1-- 1-4 and so on. The secondary battery is either a lead storage battery, a sodium sulfur battery, a redox flow battery, a lithium ion battery, a nickel hydrogen battery, or a lithium ion capacitor, or is composed of these combinations. In addition, FIG. 6 shows an example in which a secondary battery is used as a power storage device. However, as an alternative to the secondary battery, an electric double layer capacitor or a capacitor type of -10-201031822 is used, or The combination of the secondary battery and the capacitor, or a combination of other storage elements, is also the same as the effect of the present invention. Further, when the power storage device uses a system such as a flywheel that can store electric energy as kinetic energy, the effect of the present invention is not lost. The power storage devices 2-2-1, 2-2-2, . . . 2-2-m can charge the generated power of the wind power generator group based on the charge/discharge power commands from the respective upper controllers 3. Or discharge the stored power Φ. Further, the power storage devices 2-2-1, 2-2-2, . . . 2-2-m measure the charging rate SOC of each battery first, and transmit the SOC 値 to the upper controller 3 〇 the power storage system In the wind power generation system of the wind turbine generator group 1, the power generation power fluctuation of the wind turbine generator group having a large fluctuation can be alleviated by the charge and discharge operation of the power storage system, and the wind power generation system which is difficult to adversely affect the system . On the other hand, in the charge and discharge operation of the battery, there is a loss due to the loss of the power converter, the loss inside the battery, and the like. In order to utilize natural energy as much as possible, it is desirable to reduce the amount of electricity charged and discharged to the battery as much as possible. Therefore, in order to balance the mitigation of power fluctuations with the effective use of natural energy, it is necessary to reduce unnecessary charging and discharging operations that do not require changes and slowdowns. The fluctuation of the generated power output by the wind power generation device group spans over a wide frequency band. In particular, the change in the period of the medium-cycle period, which is a few minutes to about 20 minutes, is related to the expansion of supply and demand imbalance and the increase in frequency fluctuations due to insufficient adjustment of the power system -11, 201031822. It is necessary to mitigate the power fluctuations in the frequency band due to the adverse effects caused by the power fluctuations in such a medium cycle range. Specifically, the output of the generated electric power is fluctuated between a certain period of time (for example, within 20 minutes) from any time, and is normally suppressed within a certain range (for example, 10% or less of the rated value of the wind power generation system), that is, the output is suppressed. Within the allowable range of variation of electricity is effective. In the case where the power fluctuation of the wind power generation system is less than 10% of the rated value Θ, in the case where a large number of wind power generation devices are interconnected, it is possible to reduce the influence on the system. Hereinafter, a control method for suppressing a power fluctuation between 20 minutes from an arbitrary time to 10% or less of the rated value of the wind power generation system will be described. In order to control the power fluctuations for 20 minutes, it is preferable to suppress the amount of charge and discharge of the battery as much as possible while reducing the rated power of the wind power generation system by 10% or less. That is, the next control period is set by the output fluctuation range of the output power PS of the wind power generation system from the time before the specific period (between 19 minutes in FIG. 7) and the present time (in FIG. 7 is 1 minute). The output of the PS may be in the range R. Specifically, the minimum 値PSmin of the PS of the past period (between 19 minutes in FIG. 7) is added to 10%, and the upper limit of the range R is set, and the maximum 値PSmax of the past PS of the specific period is subtracted. 10%, set to the lower limit of the range R.

In the next control period (between 1 minute in Fig. 7), the charge/discharge power PB -12-201031822 of the power storage system is adjusted in such a manner that P S is limited to the range. When the power storage system 2 performs charging and discharging, whether the power generated by the wind turbine generator group 1 has escaped the above range or the SOC of the power storage system 2 is only within the charging rate target range. In such a manner that the charging/discharging electric power control of the electric storage system 2 is performed, the electric power fluctuation of the output power PS of the wind power generation system can be suppressed to 1% or less, and the charge and discharge power of the battery is reduced. the amount. Moreover, as another means of mitigating the power fluctuation of the wind power generation system Φ, the power limitation of the wind power generation device group can be utilized. In other words, during the period in which the wind speed is rapidly increased, the increase in the generated electric power PW of the wind turbine generator group 1 can be restricted by using the power limiting function of the wind power generator, and the mitigation can be made. However, the power limiting function is realized by evading the energy of the wind that can be utilized by adjusting the tilt angle. Therefore, in terms of the effective use of natural energy, it is desirable to avoid using the power limitation function as much as possible. Therefore, as means for suppressing the increase in the output power PS of the wind power generation system, it is desirable to utilize the charging of the power storage system 2 as much as possible. The power charged to the power storage system 2 is because, although a part is lost, it can be effectively utilized in discharging. Therefore, in the effective use of natural energy, it is necessary to use the charging function of the battery to store electricity as much as possible, and to suppress only the excess power that cannot be stored, using the power limiting function. In the following, a control method for minimizing the amount of charge/discharge power of the battery, and a wind power generation system that realizes a control method that does not use the power limiting function as much as possible by using the charging function of the power storage system 2 will be described in detail. . -13- 201031822 Fig. 8 is a view showing a control configuration of the upper controller 3 constituting the wind power generation system of the present invention. The host controller 3 determines the charge/discharge power command PBC1 of the battery device from the generated power PW of the wind power generation device group, the charge/discharge power PB of the power storage system, and the charge rate SOC1, SOC2, . . . , SOCm of the power storage device. PBC2.....PBCm and the power limit command PLC of the wind power generator group 1. The host controller 3 calculates the charging rate target 値SOCT of the power storage system 2 in the SOC target 値 calculation unit 3-1. Further, the upper controller 3 calculates the output power PS of the wind power generation system by performing a 加 calculation on the PW and the PB. The upper controller 3 calculates the maximum 値PSMax and the minimum 値PSMin of the PS in the past 19 minutes in the maximum 値•minimum calculation unit 3-2. Further, the upper controller 3 calculates the charge/discharge power command PBC of the power storage system in the charge/discharge power command calculation unit 3-3. The charge/discharge power command PBC is distributed to the charge/discharge power of each of the power storage devices 2-1-1, 2-1-2.....2-1-m in the charge/discharge power command distribution unit 3-5. The commands PBC1, PBC2, ..., PBCm are transmitted to the respective power storage devices. In addition, regarding the charge and discharge of the power storage system, the relationship between the electric power command PBC and the charge/discharge power command PBC1 ' PBC2.....PBCm for each power storage device is established as shown in Mathematical Formula 2. (Math 2) PBC = PBC1 + PBC2 + PBC3 + ··· + PBCm The host controller 3 is a power limit command calculation unit 3-4 that calculates the power limit command PLC of the wind power generator group. -14- 201031822 Next, the operation of the SOC target 値 calculation unit 3-1 will be described in detail using FIG. 9. The SOC target 値 calculation unit 3-1 calculates the charging rate target 値 SOCT of the electric storage system 2 from the generated electric power PW of the wind power generation unit group 1. As the charging rate target 蓄 of the power storage system 2, as shown in Fig. 9, 'PW and the SOCT are first held in a one-to-one correspondence, and the SOCT is determined in consideration of the internal enthalpy. Further, the method of determining S ct is not necessarily dependent on pw as shown in Fig. 9. For example, the effect of the present invention is not lost without depending on Φ to pw. Next, the operation of the maximum 値·minimum 値 calculation unit 3-2 will be described in detail using FIG. 1 . The maximum 値·minimum 値 calculation unit 3 - 2 stores the past P S from the current time to a certain period to the internal memory. Further, the maximum 値•minimum calculation unit 3-2 calculates the maximum 値PSMax and PSMin of the past PS from the current time to a certain period. Next, the operation of the charge/discharge power command calculation unit 3-3 will be described in detail with reference to Fig. 11 . The charge/discharge power command calculation unit 3-3 creates an intermediate PBS0C for the SOC management charge/discharge power command in the SOC management control unit 3-3-1. The charge/discharge power command calculation unit 3-3 is configured to add PW to the 値PBC1 of the PBS0C. Here, the limiter 3-3-2 and the limiter 3_3-3 are operated to obtain the intermediate 値PBC3 of the charge/discharge power command. . The charge/discharge power command calculation unit 3-3 obtains the charge/discharge power command PBC by subtracting the PW from the middle 値 PBC3. The first limiter 3-3-2 sets the upper limit 成 to add 10% of the rated rating of the wind power system to the PS of the PSMin, and sets the lower limit 値 to the 10 of 10% of the rated rating of the wind power system from PSMax. The variation of the output power PS of the wind power generation system can be suppressed to 10% or less by the effect ' -15 - 201031822 of the limiter 3-3-2 in an arbitrary cross section of 20 minutes. Further, when the power generation electric power PW of the wind power generation device group is converged within the range of the limiter, the electric storage system does not need to be charged and discharged, and unnecessary charging and discharging can be avoided. The second limiter 3 - 3 - 3 sets the upper limit 成 to 1风力% of the wind power generation system and the lower limit 値 to 〇%. By the effect of the limiter 3-3-3, if the output power PS of the wind power generation system exceeds the rating of the wind power generation system or the ps becomes negative, the wind power generation system can be prevented from becoming charged. Next, the operation of the SOC management control unit 3-3-1 will be described with reference to Fig. 12 . The SOC management control unit 3-3-1 creates a charge/discharge power command for bringing the charge rates of the respective power storage devices 2-1-1, 2-1-2, ..., 2-m to the target charge rate. Specifically, as measured by the SOC management control unit 3-3-1-1, the measurement 値SOC1 of the charging rate of the power storage device and the target 値SOCT of the charging rate are compared. At this time, if SOC1 is larger than the SOCT + dead band (for example, 2%), the 10% discharge power command of the wind power generation system is made to be the charge/discharge power command PBSOCT1. In the same way, if the SOC1 is smaller than the SOCT·dead band (for example, 2%), the 10% rated charging power command of the wind power generation system is made to be the charge/discharge power command PBSOCT1. When SOC1 converges to the SOCT soil dead zone, 0 [kW] is regarded as PBSOCT1. The SOC management control unit 3-3-1 performs the calculation for all of the power storage devices 2-1-1, 2-1-2, ..., 2-1-m, and adds the obtained charge and discharge power command PBSOCT1 &gt The PBSOCT2.....PBSOCTm method is used to generate the charge and discharge power command PBCSOC of the power storage system. In such a manner that such a control action is made, it is possible to prevent unnecessary charging and discharging of the battery. Next, the operation of the power limitation command calculation unit 3-4 will be described with reference to Fig. 13 . The power limitation command calculation unit 3-4 is based on the charge rate SOC of the power storage system 2 in the chargeable power calculation unit 3-4, and the power storage system calculates the chargeable power 値PBChargeMax. The power limit command calculation unit 3-4 is configured to add the minimum 値PSMin and PBChargeMax, P2 of the output power of the wind power generation system in the past 19 minutes (for example, 10% of the rated rated value of the wind power generation system). It is set as the power limit command PLC of the wind turbine generator group. In such a manner as to determine the PLC, even if the generated power PS of the wind turbine generator group 1 is rapidly increased, the battery is charged as much as possible, and only the power that is not charged is limited by the power limiting function. At the same time, the variation of the output power PS of the wind power generation system can be suppressed to 10% or less in an arbitrary 20-minute cross section. Next, the operation of the chargeable electric power calculation unit 3-4-1 will be described with reference to Fig. 14 . The chargeable power calculation unit 3-4-1 calculates the power storage by the chargeable power 値 of each of the power storage devices 2-1-1, 2-1-2, . . . Charging power PBChargeMax. Specifically, in the chargeable power calculation unit 3-4-1-1, the chargeable power PBChargeMax1 of the power storage device 2-1-1 is calculated from the charge rate measurement 値 SOC1 of the power storage device 2-1-1. Power storage devices 2-1-1, 2-1-2, ..., 2-1-m such as secondary batteries are ranges that can be charged by SOC change. The chargeable power calculation unit 3-4-1-1 is a chargeable and dischargeable range corresponding to the characteristics of the power storage devices 2-1-1, 2-1-2, ... -17-201031822, 2-1 -m. Stored in the memory, corresponding to the measurement 値SOC of the rechargeable battery, the corresponding rechargeable power 値PBChargeMaxl is read from the memory. The chargeable power calculation unit 3-4-1 performs the calculation for all of the power storage devices 2-1-1, 2-1-2, . . . , 2-1-m, and adds the obtained rechargeable power. In the manner of PBChargeMaxl, PBChargeMax2, ..., PBChargeMaxm, the chargeable power PBChargeMax of the power storage system 2 is calculated. Further, although PBChargeMax is determined only by the charging rate SOC of the power storage device in Fig. 14, it is also possible to correct PBChargeMax in consideration of the temperature of the power storage device, the number of years of use of the power storage device, or the total charge/discharge power amount. Next, an operation example of the wind power generation system according to the present invention will be described below. Fig. 15 shows the results obtained by the simulation by mitigating the fluctuation of the electric storage system 2 of the present invention. The upper surface of Fig. 15 shows the output possible range R of the generated electric power PW of the wind turbine generator group 1 and the output electric power PS and PS of the wind power generation system. In Fig. 15, the output possible range R is set to be changed to 20% or less of the wind power generation system in a range of 20 minutes, and if it is within the range, 20 minutes from an arbitrary time. In the meantime, the fluctuation of the wind power generation system is suppressed to 10% or less. The output power PS of the wind power generation system shown in Fig. 15 constantly converges in the output possible range R, and the output variation is within 10% of 20 minutes. The lower surface of Fig. 15 shows the charge/discharge power PB of the power storage system 2 and the charge rate SOC of the power storage system 2. Further, in the simulation of Fig. 15, the charging rate target 値 range of the power storage system 2 is set to (50% ± 2% = 4 8% to 52%). At the time before the time -18-201031822 3 [hour] of Fig. 15, since the fluctuation range between 20 minutes is less than 10%, and the SOC is converged in the charging rate target range, the power storage system 2 does not charge. Discharge. Therefore, the problem of the present invention can be achieved without charging and discharging the battery as much as possible. Further, before and after the time of 4.5 [hour], the generated electric power PW of the wind turbine generator group 1 does not converge in the output possible range R, and the battery performs the charging operation. Here, in order to converge the charging rate SOC of the power storage system 2 within the charging rate target range, the SOC can be converged within the charging rate target range by the charging operation. Further, in the charging operation of the SOC management, the PS system operates so that the fluctuation range between 20 minutes is within 10%. Next, an operation example of the wind power generation system relating to the power limitation control of the present invention will be described using Fig. 16. Fig. 16 is a view showing the results obtained by the simulation by mitigating the fluctuation of the power limitation control of the present invention. The upper surface of Fig. 16 shows the generated electric power PW of the wind turbine generator group, the output electric power PS of the wind power generation system, the electric power 限制 limit command PLC of the wind power generator group 1, and the wind power generation when the wind turbine is not restricted. The generated power PW0 of the device group 1. The generated electric power of the wind turbine generator group 1 starts to rise from before and after the time 1.0 [hour], and rises and then the fluctuation range of the power storage system is suppressed to within 10% within 20 minutes. Before and after 2_0 [hour], the charging rate of the power storage system 2 reaches 1 〇〇 [%]. In the case of the power storage system 2, the charging operation cannot be performed when the charging rate is 100 [%] or more, and the power generation function PW is suppressed by the power limiting function of the wind turbine generator group 1 at time 2.0 [hour]. By using the power limiting function of the SOC of the power storage system 2, the power limiting function is not used as much as possible in order to preferentially perform the charging operation of the power storage system 2 -19 - 201031822, and the natural energy is effectively utilized, and the present invention is satisfied. . Next, the effect of the present invention will be described using FIG. Fig. 17 is a view showing the results obtained by applying the present invention to the actual wind power generation system by simulation. Specifically, the power generation output data of the wind power generation system actually existing in the power storage system in which the power storage system is not installed is used, and the operation obtained when the power storage system is installed is numerically simulated. In terms of simulation, the MW capacity of the power storage system is regarded as 90% of the rated capacity of the @ wind power system, and the MWh capacity is regarded as infinite. That is, the power storage system can be normally discharged by 90% and charged by 90%. In terms of simulation, because of the comparison object, in the other battery control of the present invention, the output power PS of the wind power generation system of the prior art is a delay of tracking the following power generation power PW to the wind power generation device group 1. In the method of controlling the charge and discharge of the battery, the control for charging and discharging the battery only when the one-time delay tracking of the escape PW follows the + fixed width is also evaluated. 〇 Figure 17 is a diagram of the simulation results, showing the escape frequency, the total charge power of the battery, the total discharge power, and the loss due to battery charge and discharge. Moreover, the so-called escape frequency refers to the frequency of occurrence of a phenomenon in which the wind power generation system PS of the wind power generation system fluctuates more than 10% in 20 minutes from an arbitrary time. Further, the loss is determined by the total discharge power amount of the battery, assuming that the charge/discharge efficiency of the battery is 70%. In the case of one delay tracking follow-up, and one delay tracking followed by + fixed width control, there is a case where the time constant of delay of -20-201031822 is 180 minutes or more to achieve an escape rate of 0.0 [%]. In these cases where the escape rate was 0.0 [%], the loss was 5.8 [%] even when the charge and discharge efficiency was the lowest. On the other hand, in the case where the present invention is implemented, the escape frequency is 〇.〇 [%], and the loss is 2.1 [%], which is very small. Therefore, it is possible to determine that the amount of charge/discharge power of the power storage system is reduced and the loss due to charge and discharge of the power storage system is reduced. Further, the configuration of the wind power generation system of the present invention is not limited to that shown in Fig. 1, and the function of the control device of the power storage system is also the same as that of the present invention. Similarly, when the upper controller 3 also functions as the SCADA 1-1 of the wind turbine generator group 1, the effects of the present invention are not lost. Further, in the case where the wind power generator group does not hold SCADA1-1, the host controller 3 directly gives an electric power limitation command to each of the wind power generators 1-1-1, 1-1-2, . . . In the form of n, the effect of the present invention is not lost. In addition, in the wind turbine generator of the present invention, it is not necessary for all of the windmills to have the power limiting function; instead of the power limiting function, the wind power generation device group is used as a whole for the wind power generation device group by switching the operation and stop states of the respective wind turbines. The present invention can be implemented by adopting a configuration having a function of limiting the generated power to a specific value or less. Further, in the present embodiment, the power fluctuation 'of the fluctuation mitigation object is limited to a frequency band of several minutes to 20 minutes; however, the frequency band that should be changed gently is different for each power system, and the corresponding power is passed. The effect of the system to change the control constant can achieve the same effect as the present invention - 21 - 201031822. In the present embodiment, the generated electric power PW first converges in the output possible range R, and the charging rate SOC converges in the charging rate target range, and the electric storage system 2 does not perform charging and discharging. While the power storage system is not being charged or discharged, the supplementary power supply of the inverter 2-1-1-2 constituting the power storage system 2 may be stopped. Specifically, the air-cooling fan constituting the inverter 2-1-1-2 is stopped, the supply of the control power source is stopped, and the switching operation of the semiconductor element is stopped. By the stop operation of the power supply, the @ loss caused by the power storage system 2 can be reduced, and natural energy can be utilized more effectively.

As described above, by using the present invention, it is possible to suppress fluctuations in the output of the wind power generation system, and it is also possible to reduce the loss due to charging and discharging of the power storage system 2. Further, by using the present invention, it is possible to reduce the loss due to the power limitation. In addition, the effect of the present invention can reduce the amount of charge/discharge power of the power storage system 2, so that the battery capacity required for the low power storage system 2 can be reduced, and the power storage system of the present invention can be easily introduced into the wind power generation system. system. Moreover, according to the effect of the present invention, it is possible to reduce the charge/discharge power amount of the power storage system 2, and it is possible to extend the life of the power storage device more than before. Therefore, under the use of the present invention, natural energy can be utilized more efficiently than the prior art. [Embodiment 2] A second embodiment of the present invention will be described with reference to Figs. 18, 19, and 20. The difference from the first embodiment of the present invention is that the wind power generation system holds the output power upper limit command PMaxC defined by the special -22-201031822, and the output of the wind power generation system is changed to the output power upper limit command PMaxC. The power limitation of the wind power generation device group and the charging of the power storage system operate. A portion different from the configuration of the first embodiment of the present invention will be described with reference to Figs. 18, 19 and 20. The charge and discharge command calculation unit 3a-3 of this embodiment will be described with reference to Fig. 18 . The charge/discharge command calculation unit 3a-3 of the present embodiment differs from the charge/discharge command calculation unit 3-3 of the first embodiment in that the upper limit 限制 of the limiter 3a-3-3 is not a wind power generation system. The rating is determined to be the point of the output power cap command PMaxC (in this embodiment, the rated 70% of the wind power system) of the wind power system. The other parts of the charge and discharge command calculation unit 3a-3 of the present embodiment are the same as those of the charge and discharge command calculation unit 3-3 of the first embodiment, and thus the description thereof will be omitted. The power limit command calculation unit 3a-4 of the present embodiment will be described with reference to Fig. 19 . The power limitation command calculation unit 3a-4 of the present embodiment differs from the power limitation command calculation unit 3-4 of the first embodiment in that the minimum selection calculation unit 3a-4-2 is newly added. The minimum 値 selection calculation unit 3a-4·2 selects one of the smaller ones (PSMin+10%) and PMaxC'. The other parts of the power limit command calculation unit 3a-4 of the present embodiment are the same as those of the power limit command calculation unit 3_4 of the first embodiment, and thus the description thereof will be omitted. In the wind power generation system of the second embodiment, the output power of the wind power generation system of the second embodiment is suppressed to be equal to or lower than PMaxC -23-201031822. The control operation and effect of the configuration of the second embodiment of the present invention are as follows. This will be described using FIG. In the wind power plant group in which the power storage system is installed, the cost of the power storage system 2 is generally higher than the cost of the entire wind power generation system. The cost of the battery system 2 has a hindrance to the introduction of the power storage system and the formation of the wind power generation device group. It is desirable to reduce the capacity of the power storage system 2 as much as possible in order to easily introduce the power storage system-integrated wind power generation device group. However, if the capacity of the power storage system 2 is reduced, the fluctuation of the output power PS of the wind power generation system tends to increase. For example, an example of the operation in the case where the rated charging/discharging electric power 値 (maximum charging/discharging electric power 値) of the electric storage system is 60% of the rated enthalpy of the wind power generation system is shown in FIG. Moreover, the rated charge and discharge power of the power storage system is generally equivalent to the converter capacity of the power storage system. In Figs. 20(a) and 20(b), it is assumed that the wind speed in the vicinity of the wind power generation system is gradually increased, and thereafter, the situation is drastically reduced in terms of time. Fig. 20 (a) is a diagram showing temporal changes in electric power and charging rate SOC in the case where electric power is controlled by the method @ described in the first embodiment. The generated electric power PW of the wind turbine generator group 1 gradually increases in accordance with the wind speed, and thereafter, it is drastically reduced in terms of time. When the generated power PW is increased, the fluctuation rate can be suppressed to a certain value or less by the charging operation of the power storage system 2 and the power limiting operation of the wind turbine generator group 1 (in the present embodiment, the fluctuation range of the PS during 20 minutes is 10% or less). However, it is necessary to alleviate the fluctuation of the PS through the discharge operation of the power storage system 2 when the wind turbine output PW is drastically reduced, but since the rated capacity of the power storage-24-201031822 system is only 60% of the wind power generation system, It is impossible to suppress the variation rate of the PS below a certain value, and a large change has occurred. Fig. 20 (b) is a view showing temporal changes in electric power and charging rate SOC in the case where the control operation of the present embodiment is performed. In the present embodiment, the output power upper limit command PMaxC of the wind power generation system is set to (60%) + 10% of the rated power 値 of the power storage system. The output power PS of the wind power generation system is constantly suppressed by PMaxC by the power limiting operation of the wind turbine generator group 1 and the charging operation of the power storage system 2. Therefore, even when the wind speed is drastically reduced and the generated electric power PW of the wind turbine generator group 1 is drastically reduced, the maximum fluctuation range can be suppressed to 10% via the discharge operation of the electric storage system 2 (= PMaxC - the rated value of the electric storage system値) Below. As a result, the fluctuation of the output power of the wind power generation system can be suppressed to a certain value or less (in the present embodiment, the fluctuation range of the PS within 2 minutes is suppressed to 10% or less). As shown in the present embodiment, the electric power limiting function of the wind power generation device group 1 and the charging function of the electric storage system 2 are constantly stored in a manner of being less than or equal to a specific value by the output electric power PS of the wind power generation system. When the rated capacity of the system 2 is smaller than the rated capacity of the wind turbine generator group 1, the fluctuation rate can be suppressed to a certain value or less. By this effect, the capacity of the power storage system 2 can be reduced, and the battery-mounted wind power generation system can be easily introduced, and natural energy can be utilized effectively. [Embodiment 3] A third embodiment of the present invention will be described with reference to Figs. 21 to 27 - 25 - 201031822 This embodiment differs from the first embodiment and the second embodiment in that a wind power generation system is in wind power generation. The power limitation control of the device group 1 and the charge and discharge control of the power storage system 2 are based on the predicted power generation of the wind power generation device group 1 based on weather prediction. The configuration of the wind power generation system of the present invention will be described using Fig. 21 . In the components of the wind power generation system of the present embodiment shown in Fig. 21, elements that are the same as those in Fig. 1 are the same constituent elements, and therefore their description will be omitted. In the wind power generation system of the present embodiment, the upper controller 3b receives the power generation electric power prediction 値PP of the wind power generation system from the power generation electric power prediction company 9 through the signal line 8. The power generation electric power forecasting person 9 predicts the future generated electric power P P from the past meteorological data, the topographical data, the current operating state of the wind power generation system, and the past operational data of the wind power generation system. The configuration of the upper controller 3b will be described with reference to Figs. 22, 23, 24, and 25. In the configuration of the upper controller 3b of the present embodiment, the difference from the upper controller 3 (FIG. 8) of the first embodiment is only in the power storage system SOC target 値 calculation unit 3b-1, and the power storage system. The charge/discharge power command calculation unit 3 b-3 and the wind turbine generator group power limit command calculation unit 3b-4. Among the components of the upper controller 3b, the other components are the same as those of the first embodiment, and thus the description thereof will be omitted. The operation of the SOC target 値 calculation unit 3b-1 of the present embodiment will be described with reference to Fig. 22 . In Fig. 22, the operation of 3 b-1-1 is performed in the same manner as the SOC target 値 calculation unit 3-1 of the first embodiment, and therefore -26-201031822 will be omitted. The SOC target 値 calculation unit 3b-1 is an internal power prediction/rate change rate calculation unit 3 b-1-2, and in the near future, investigates a phenomenon in which the power generation electric power prediction 値PP greatly changes. The power generation power forecast 値PP has a small increase in the SOC target in the near future. In addition, when the power generation electric power forecast 値PP is drastically reduced in the near future, the S0C target is set to be large. The S0C target is determined by the generated electric power PW of the wind power generation device group in the same manner as in the first embodiment, if the power generation electric power prediction 値PP does not change rapidly in the near future. In the present embodiment, the wind power generation system is configured to change the target 値S0CT of the SOC according to the power generation electric power prediction 値PP in accordance with the operation of the SOC target 値 calculation unit 3b-1 of the electric storage system 2. Next, the operation of the charge and discharge electric power command calculation unit 3b-3 of the present embodiment will be described with reference to FIG. In the charge/discharge power command calculation unit 3b-3 shown in FIG. 23, the same components as those of the charge/discharge power command calculation unit 3-3 shown in FIG. 11 are the same as those in the first embodiment. For the sake of the same operation, the description is omitted. The charge/discharge power command calculation unit 3b-3 of the present embodiment sets the upper limit 値 in the limiter 3b-3-3 so as not to be the rated value of the wind power generation system but to output the power upper limit command PMaxC. PMaxC is calculated by the wind power generation device group output power prediction 値PP in the power generation system upper limit calculation unit 3b-3-4. Next, the operation of the power limitation command calculation unit 3b-4 of the present embodiment will be described with reference to Fig. 24 . In the wind turbine generator group power limit command calculation unit 3b-4 shown in FIG. 24, the wind turbine generator group power limit command calculation unit 3-4 shown in FIG. The requirements of the 201031822 are the same as those of the first embodiment, and the description thereof will be omitted. The wind power generation device group power limitation command calculation unit 3b_4 of the present embodiment compares (PSMin + 10%) and PMaxC with the minimum value selection calculation unit 3b-4-2, and selects one of the smaller ones. In the output power upper limit 値 command calculation unit 3b-4-3, the PMaxC ’ is calculated by the wind power generation unit group output power prediction 値PP. The operation of the power generation system upper limit 値 calculation unit 3b-3-4 and the power generation system upper limit calculation unit 3b-4-3 will be described with reference to Fig. 25 . The power generation system 觞 upper limit 値 calculation unit 3b-3-4 (3b-4-3) is based on the power generation electric power prediction 値PP, and investigates the phenomenon that the power generation electric power prediction 値PP is drastically reduced in the future, and accordingly, it is created. The power upper limit command PMaxC is output. Specifically, PMaxC is gradually reduced until the time when the PP is drastically reduced. In addition, the PMaxC is reduced in the early stage by a certain ratio of 1 〇 [% ] / 20 [minutes], and the PMaxC becomes the rated capacity of the power storage system 2 at the time when the PP is drastically reduced. Set PMaxC.且 Moreover, in the time zone where the PP does not change rapidly, the PMaxC system is set to the wind power system rated 値. In the present embodiment, the wind power generation device group holds the operation of the charge/discharge electric power command calculation unit 3b-3, the electric power limitation command calculation unit 3b_4, and the upper limit 値 calculation unit 3b-3-4, and the wind power generation device group The output power upper limit command PMaxC is changed by the wind power generation power prediction 値PP based on the weather prediction, and the power output of the wind power generation system 1 and the power storage system 2 are charged. To suppress the above PMaxC means. -28- 201031822 An example and effect of the control operation in the case of carrying out the embodiment of the present invention will be described with reference to Figs. 26 and 27 . 26(a) and 26(b) show an example of an operation in which the wind speed in the vicinity of the wind power generation system is rapidly increased; and Figs. 27(a) and 27(b) show the rapid wind speed near the wind power generation system. An example of the phenomenon of land reduction. The operation of the case where the wind speed is rapidly increased will be described with reference to Figs. 26(a) and 26(b). Further, in the present embodiment, the power storage system 2 Φ ' is assumed to be a lead storage battery, a sodium sulfide battery, or a lithium battery which is a secondary battery. In general, a secondary battery has a property that the magnitude of the chargeable power is reduced in a state where the charge rate SOC is high. For this reason, in the case where the charging operation of the power storage system 2 is performed for the sake of the fluctuation, it is desirable to set the amplitude 値 of the rechargeable power to be large in advance by controlling the charging rate SOC of the power storage system 2 to be low. . Fig. 2 6 (a) is an operation example in the case of performing the control shown in the embodiment 1 of the present invention. In Fig. 26 (a), the wind power generation system changes the O SOC target to the generated power PW of the wind power generation device group. For this reason, as the generated power PW increases, the charging rate SOC also increases. When the charging rate SOC becomes high, the amplitude of the chargeable electric power is small, and it is impossible to alleviate the fluctuation rate only under the charging operation of the electric storage system 2. In order to suppress the fluctuation rate of the wind power generation system output power PS to a certain level or less, the wind power generation system suppresses the power that is not charged in the power storage system 2 by the power limiting function of the wind power generation device group 1. Therefore, the loss of natural energy due to power limitation occurs. Fig. 26 (b) is an operation example of the case where the control -29-201031822 as shown in the embodiment 3 of the present invention is performed. In the operation of the SOC target 値 calculation unit 3b-1 shown in Fig. 22, the SOC target 値SOCT is set to 0 [%] before the power generation power PW increases sharply. By this effect, the SOC is reduced to the vicinity of 〇[%] before the sudden increase in PW, and the SOC can be kept low even during the period in which the PW is increased rapidly. By keeping the SOC low, the amplitude of the chargeable power of the power storage system is increased, and the power limitation is not required. Only the charging operation of the power storage system 2 can suppress the fluctuation rate of the PS to 10 値 or less. The electric power charged to the electric storage system 2 can discharge most of the electric power to the system, and the natural energy can be effectively utilized as compared with the case of Fig. 26 (a) which uses electric power limitation to suppress the fluctuation. Next, the operation of the case where the wind speed is rapidly reduced will be described with reference to Fig. 27 . In Figs. 27(a) and 27(b), the converter rating of the power storage system 2 is assumed to be 50 [%] of the wind turbine generator group 1. Fig. 27 (a) is an operation example of the case where the control shown in the first embodiment of the present invention is performed. As the wind speed is rapidly reduced, the electric power PW of the wind power generator group 1 is also rapidly reduced. When the PW is rapidly reduced, the wind power generation system performs the discharge operation by the power storage system 2 in order to alleviate the fluctuation of the output power PS. However, since the rated capacity of the power storage system 2 is only 50%, the fluctuation cannot be alleviated, resulting in a comparison. Big change. On the other hand, Fig. 27 (b) is an operation example in the case of performing the control shown in the third embodiment of the present invention. In Fig. 27(b), the wind power generation system corresponds to the power generation electric power prediction 値PP according to the weather prediction as shown in Fig. 22, and the SOC target 値 is changed, as shown in Fig. 23 -30- 201031822 The ground corresponds to the PP, and the output power upper limit command PMaxC of the output power PS of the wind power generation system is changed. In the case where the SOC target 値 is set to 100 [%] in the case where the SOC target 値 is set to 100 [%], the UPS target 値 is set to 100 [%], and the discharge electric energy necessary for the fluctuation and the mitigation is made. It is ensured to the power storage system 2 in advance. In addition, when the PW is reduced, the output power upper limit command PMaxC is reduced to the inverter capacity of the power storage system 2 in advance, and the discharge operation of the power storage system 2 becomes possible after the power generation © the power PW is suddenly reduced. The fluctuation rate of the output power PS is reduced to a certain value or less (in the present embodiment, the fluctuation range of the PS during 20 minutes is 10% or less). By this effect, it becomes easy to introduce a battery-mounted wind turbine generator group, and natural energy can be utilized effectively. Further, as the signal line 8 shown in Fig. 21, a network such as a LAN or a WAN or a dedicated line or the like is used. Further, the effect of the present invention is the same as the effect of the present invention in that the signal line 8' is not used to receive the generated power prediction ® 値PP by using a wireless signal or the like. As described above, the wind power generation system of the present invention has means for changing the charging rate target 値SOCT of the power storage system 2 based on the power generation electric power prediction 値PP of the wind power generation device group 1, and according to the aforementioned SOCT. A means for changing the charging rate SOC of the power storage system 2. Moreover, the wind power generation system of the present invention holds the means for changing the output power upper limit command PMaxC of the wind power generation system based on the power generation electric power prediction 値PP' of the wind power generation device group, and suppresses the output electric power PS by the PMaxc The following means of PMaxC. According to the effect of the present invention, even if the wind speed is rapidly increased under the condition that the wind speed is rapidly increased, the energy loss due to the power limitation can be avoided, and the natural energy can be effectively utilized. Further, even under the condition that the wind speed is rapidly reduced, even when the rated capacity of the power storage system 2 is reduced, the fluctuation of the output power PS can be alleviated. As a result, it becomes easy to introduce a battery-mounted wind power generation system, and natural energy can be utilized effectively. [Embodiment 4] A fourth embodiment of the present invention will be described with reference to Figs. 28 and 29 . The basic configuration of the wind power generation system of the present embodiment is the same as that of the first embodiment, and thus detailed description thereof will be omitted. The most important feature of the present embodiment is that when the fluctuation of the generated electric power PW of the wind turbine generator group 1 is relatively small, the battery is charged so that the output power PS of the wind power generation system follows the one-step delay command from the generated electric power PW. When the fluctuation of the generated electric power PW of the wind turbine generator group 1 exceeds the range of the reference power, the battery is charged by not following the tracking delay command to converge to the range in which the PS is the reference. Discharge. The control system of this embodiment will be described using FIG. Fig. 28 is a view showing the control system of the charge and discharge electric power command calculation unit 3-3c of the upper controller 3 of the present embodiment. Since the other control systems of the upper controller 3 of the present embodiment are the same as those of the first embodiment, the description thereof will be omitted. The charge/discharge power command calculation unit 3-3c creates the intermediate 値PWLPF of the generated power PW that has been subjected to the primary delay calculation to the wind turbine generator group 1 in the primary delay calculation unit 3-3C-5. In the SOC management control unit 3-3-1, the charge/discharge power command calculation unit -32-201031822 3-3c creates an intermediate 値 PBSOC for the charge/discharge power command for SOC management. The charge/discharge power command calculation unit 3-3 is configured to add PWLPF to the 値PBC1 of the PBSOC, and here, the limiter 3-3-2 and the limiter 3-3-3 are operated to obtain the middle of the charge/discharge power command.値PBC3. The charge/discharge power command calculation unit 3-3 obtains the charge/discharge power command PBC by subtracting the PW from the middle 値PBC3. The first limiter 3-3-2 sets the upper limit 成 to add 10% of the wind power rating to the PSMin, and sets the lower limit 成 to 10% of the rated wind power system from PSMax. value. By the effect of the limiter 3-3-2, the variation of the output power PS of the wind power generation system can be suppressed to 10% or less in an arbitrary 20-minute cross section. The effect of the present invention will be described using FIG. Fig. 29 is a view showing an operation example of the wind power generation system as shown in the embodiment. In the wind power generation system of the present embodiment, the fluctuation of the output power PS of the wind power generation system is made such that the output possible range is within 10% within 20 minutes. When the PWLPF converges within the aforementioned output possible range R, the charge/discharge power of the power storage system 2 is controlled such that the generated power PS of the wind power generation system follows the approach to the PWLPF. When the PWLPF is out of the output possible range R, the charging/discharging electric power of the electric storage system 2 is controlled such that the PS matches the upper limit of the output possible range R or the lower limit. By applying the control as shown in this embodiment to the wind power generation system, even if the time constant of the one-time delay tracking follows is small, the fluctuation of the generated power PS of the wind power generation system can be suppressed to a specific 値- 33- 201031822 Below. By this effect, the amount of charge/discharge power of the power storage system 2 can be reduced as compared with the case where only one delay tracking follow-up operation is performed. Since the amount of charge and discharge power of the power storage system 2 is reduced, the loss generated in the power storage system 2 can be reduced, which is related to the effective aspect of natural energy. [Embodiment 5] In the fifth embodiment of the present invention, FIG. 30 is used. 31, 32, 33, and 34 are explained. Different from the second embodiment of the present invention, the output power upper limit command PM ax C of the wind power generation system is determined by the energy storage of the power storage system 2. A portion different from the configuration of the second embodiment of the present invention will be described with reference to Figs. 30, 31, 32, and 33. The charge and discharge command calculation unit 3d-3 of this embodiment will be described with reference to Fig. 30. The charge/discharge command calculation unit 3d-3 of the present embodiment differs from the charge and discharge command calculation unit 3a-3 of the first embodiment in that the upper limit 値PMaxC of the limiter 3d-3-3 is not ©. However, it is determined by the charging rate SOC of the power storage system 2. The other portions of the charge and discharge command calculation unit 3d-3 of the present embodiment are the same as those of the charge and discharge command calculation unit 3a-3 of the second embodiment, and therefore will not be described in detail. Next, the power limitation command calculation unit 3d-4 of the present embodiment will be described using Fig. 3 1. The power limitation command calculation unit 3d-4 of the present embodiment differs from the power limitation command calculation unit 3a-4 of the first embodiment in that the output power upper limit 値PMaxC is not specific but is stored. Department-34- 201031822 System 2 charging rate SOC to determine the point. The other parts of the power limitation command calculation unit 3d-4 of the present embodiment are the same as those of the charge and discharge command calculation unit 3d-4 of the second embodiment, and thus detailed description thereof will be omitted. Next, the operation of the output power upper limit command calculation unit 3d-3-4 (3d-4-3) will be described with reference to Fig. 32. The output power upper limit command calculation unit 3 (1-3-4 (3d-4-3) first calculates the charge system SOC of the power storage system 2 in the energy storage calculation unit 3d-3-4-1. Dischargeable energy storage E ® . Output power upper limit calculation unit 3d-3-4 ( 3d-4-3 ), the output power upper limit command PMaxC corresponding to the energy storage E is pre-memorized internally, and the output power upper limit command is output. In the selection unit 3d-3-4-2, PMaxC is selected. Fig. 33 shows the relationship between the energy storage E and the output power upper limit command PMaxC. The power storage system is controlled by the power PMaxC by the fluctuation (10%/20) When the rate of change of the minute is to be discharged, the total discharge energy that becomes necessary is taken as EPMaxC. At this time, between EPMaxC 'E, the relationship as shown in Mathematical Formula 3 is held.

(Equation 3) The total discharge energy EPMaxC<energy storage E is obtained by the discharge of the electric storage system 2 when the electric power generated by the wind turbine generator group 1 is suddenly reduced by the relationship shown in the mathematical expression 3 The fluctuation of the output power can be suppressed to a predetermined value (10% / 2 〇 minutes) or less. The effect of the present invention will be described using FIG. Fig. 34 shows a situation in which the power generation electric power PW of the wind power generation device group is suddenly reduced from -35 to 201031822 at time t0. Fig. 34 (a) is a diagram showing the operation of the case where there is no upper limit of the output power as shown in the first embodiment. In the period from time to time in Fig. 34(a), the SOC target range is also increased in response to the situation in which the generated power is increased. As shown in Fig. 34 (a), there is a delay in the generation of the SOC tracking follow-up to the SOC target range. Therefore, there is a situation in which a phenomenon of insufficient energy storage necessary for discharge is caused. In Fig. 34(a), the wind turbine output is suddenly reduced at time t0, and the power storage system 2 performs a discharge operation _ in order to alleviate the subsequent power fluctuation. However, at time t1, the SOC reaches 0% (sufficient energy storage), the discharge operation cannot be performed, and a large power fluctuation occurs. On the other hand, in the control mode of the present embodiment as shown in Fig. 34 (b), the output power upper limit PMaxC is changed corresponding to the energy storage (or S0C) of the power storage system. According to the effect of the PMaxC, the output power PS is also small at the time t0, and the wind turbine output is suddenly reduced at the time t0, and the electric storage system 2 performs electric discharge, but sufficient energy storage can be secured in advance, and discharge can be utilized. The operation suppresses the power fluctuation below the predetermined threshold. Moreover, the method of limiting the output power PS of the wind power generation system as shown in this embodiment is not limited to the charge and discharge control of the battery as shown in the first embodiment, and the tracking method is used as the control mode of the battery. Other control methods such as one-time delay signal to the generated power PW are also possible. As shown in the present embodiment, the output power PS of the wind power generation system is limited in accordance with the energy storage of the power storage system 2, and the situation in which the power generation of the wind power generation device group 1 is suddenly reduced is caused. 36-

201031822, it is also possible to suppress the rate of change of electric power more reliably. This effect can be easily introduced into a power generation station, and energy can be supplied. [Embodiment 6] With regard to the sixth embodiment of the present invention, Fig. 35 and Fig. are used. The configuration of the wind power generation system of the present embodiment is shown in the configuration of Fig. 35, and the same reference numerals are used for the configuration of the first embodiment. The most important feature of this embodiment is that the charge of each of the power storage devices 2-1-1, 2-1-2, ..., 2-1-m of the wiper 2 is controlled to be different from each other. In the present embodiment, as the battery constituting the power storage device, a lead storage battery, a sodium sulfide battery, or lithium crucible which is a secondary battery is used. The secondary battery uses its characteristics to depend on s O C to change the wattage. In general, the SOC of the battery is reduced by the amplitude of the charging power, and conversely, when the SOC is low, the amplitude of the force tends to decrease. Fig. 36 is a view showing the charging rate SOC and ? power constituting the 2-1-1, 2-1-2, ..., 2-1-m of Fig. 35; The power storage devices 2-1-1, 2-1-2, ..., 2-1-m SOC are controlled in such a manner that the charging rate is controlled to be different in the case of holding the characteristics as shown in Fig. 36. , can increase the range of the charge. The effects will be described with reference to Figs. 37(a) and 37(b). In the present embodiment, the power storage system 2 is hereinafter referred to as 値. Use Nature 36 to illustrate 30. In the figure, the electric power rate S0C of the same power storage system is assumed to be "charge and discharge in the case of the pool; when the battery is high, the storage device of the cocoa discharge electric charge" can be charged and discharged, the charging rate is 丨, each of the electric storage devices, and the electric discharge device is discharged. The storage capacity of -37- 201031822 is composed of 2-1-1, 2-1-2.....2-1-10. The capacity of each power storage device is rated at 600 [kWh]. Fig. 37(a) shows a case where all of the SOC of the power storage device is controlled to the same 値 (= 40%). In this case, the relationship between the SOC of each power storage device and the chargeable/dischargeable power (Fig. 36), The chargeable electric power of the entire power storage system is 40%, and the dischargeable electric power is 40%. On the other hand, Fig. 37(b) shows a case where the SOC of the power storage device is changed depending on each power storage device. Specifically, In the six power storage devices of the power storage devices 2-1-1 to 2-1-6, the SOC_ is controlled to 60%, and the remaining four are controlled within the SOC 10%. The power storage system 2 is accumulated in the entire The amount of energy ' is 2400 [kWh], which is the same as the case of unified SOC. In this case, the total chargeable power in the power storage system is 40%, but the dischargeable power The expansion of the power storage system 2 increases the range that can be changed by the charge and discharge operation of the power storage system 2. As shown in Fig. 35, the upper controller 3d maintains the average of the power storage system 2. The SOC is a certain condition, or the energy storage is a constant condition, and the chargeable and dischargeable power of the entire power storage system 2 is determined to be the maximum, and each battery is determined to be 2-1-1.....2 By the effect of the present embodiment, the range of the chargeable/dischargeable electric power of the electric storage system 2 is expanded, and the range of fluctuation and relaxation is expanded by the charge and discharge operation. Therefore, in order to reduce the fluctuation, it is possible to reduce the SOC target. The capacity of the power storage system 2, which is necessary for the wind power generation system, is easily introduced into the battery-mounted wind power generation system through the capacity reduction of the power storage system, and is related to the effective use of natural energy -38- 201031822. [Advantages] The present invention can be applied to another power generation system in which fluctuations in output power are large, in addition to the alternative to the wind power generation device group. Specifically, The generation of the wind power generation device group can be applied to a solar power generation system, a wave power generation system, or a power generation φ system in which these are combined. [Schematic Description] FIG. 1 shows a first embodiment of the present invention. Fig. 2 is a view showing an example of a wind power generator according to a first embodiment of the present invention. Fig. 3 is a view showing an example of Φ of the wind power generator according to the first embodiment of the present invention. Fig. 4 is a view showing an example of a wind power generator according to a first embodiment of the present invention. Fig. 5 is a view showing an example of the wind power generator of the first embodiment of the present invention. Fig. 6 is a view showing an example of a power storage device according to a first embodiment of the present invention. Fig. 7 is a view showing the output power of the wind power generation system of the first embodiment of the present invention. -39- 201031822 Figure 8 is a diagram showing the control system of the upper controller of the first embodiment of the present invention. Fig. 9 is a view showing a charging rate target forming means according to the first embodiment of the present invention. Fig. 10 is a view showing the maximum 値·minimum 演 calculation means of the first embodiment of the present invention. Fig. 11 is a view showing a charging/discharging electric power command generating means according to the first embodiment of the present invention. @ Figure 12 is a view showing a charging rate management means of the first embodiment of the present invention. Fig. 13 is a view showing a means for forming a power limit command according to the first embodiment of the present invention. Fig. 14 is a view showing the charging power calculation means of the first embodiment of the present invention. Fig. 15 is a view showing an operation example of the wind power generation system of the first embodiment of the present invention. Fig. 16 is a view showing an operation example of the wind power generation system of the first embodiment of the present invention. Fig. 17 is a view showing the effect of the present invention in the first embodiment of the present invention. Fig. 18 is a view showing a charging/discharging electric power command generating means according to a second embodiment of the present invention. Fig. 19 is a view showing a means for forming a power limit command according to a second embodiment of the present invention. -40- 201031822 Fig. 20(a) is a view showing an operation example of the wind power generation system in the case where the upper limit of the system is not set in the second embodiment of the present invention. Fig. 20 (b) is a view showing an operation example of the wind power generation system in the case where the upper limit of the system has been set in the second embodiment of the present invention. Fig. 21 is a view showing the configuration of a wind power generation system according to a third embodiment of the present invention. Fig. 22 is a view showing the charging rate target φ forming means of the third embodiment of the present invention. Fig. 23 is a view showing a charging/discharging electric power command generating means according to a third embodiment of the present invention. Fig. 24 is a view showing a means for forming a power limit command according to a third embodiment of the present invention. Fig. 25 is a view showing the output power upper limit 演 calculation means of the third embodiment of the present invention. Fig. 26 (a) is a diagram showing an operation example of the case where the wind power generation system of the third embodiment of the present invention does not use the power generation electric power prediction. Fig. 26 (b) is a diagram showing an operation example of the case where the power generation electric power prediction system of the third embodiment of the present invention has been used. Fig. 27 (a) is a diagram showing an operation example of a case where the power generation electric power prediction system is not used in the wind power generation system according to the third embodiment of the present invention. Fig. 27 (b) is a diagram showing an operation example of the case where the power generation electric power prediction system of the third embodiment of the present invention is used. Fig. 28 is a view showing a charging/discharging electric power command generating means according to a fourth embodiment of the present invention. -41 - 201031822 Fig. 29 is a view showing an operation example of the wind power generation system of the fourth embodiment of the present invention. Fig. 30 is a view showing a charging/discharging electric power command generating means according to a fifth embodiment of the present invention. Fig. 31 is a view showing a means for forming a power limit command according to a fifth embodiment of the present invention. Fig. 3 is a view showing a means for forming a power limit command according to a fifth embodiment of the present invention. @ Figure 33 is a view showing the relationship between the energy storage and the power limitation command of the fifth embodiment of the present invention. Fig. 34 (a) is a view showing the control operation of the first embodiment of the embodiment of the present invention. Fig. 34 (b) is a view showing the control operation of the fifth embodiment of the embodiment of the present invention. Fig. 35 is a view showing the configuration of a wind power generation system according to a sixth embodiment of the present invention. Fig. 36 is a view showing a possible range of charge and discharge of the electrical storage device of the sixth embodiment of the present invention. Fig. 37 (a) is a view showing a conventional charging rate control of a sixth embodiment of the present invention. Fig. 37 (b) is a view showing the charge rate control of the sixth embodiment of the present invention. [Explanation of main component symbols] -42- 201031822 1 : Wind power generation unit group

1-1 : SCADA 1-1-1, 1-1-2.....l-1-n: wind power generators 1-1-1, l-1-la-l, l-1- Lb-l, 1 -1 - 1c-1: blades 1-1-1-2, ll-la-2, ll-lb-2, l-1-lc-: anemometer 1-1-1-3, Ll-la-3, ll-lb-3, l-1-lc-: shifting gear 1-1-1-4: DC-excited synchronous generator Φ ll-la-4 : AC-excited synchronous generator ll- Lb-4: permanent magnet generator or induction generator ll-lc-4: induction generators 1-1-1-5, 1-1-1-6, ll-la-6, ll-lb-6 2-1-1-2 : Power converter 1-1-1-7, ll-la-7, ll-lb-7, ll-lc-7: interconnection transformer 1-1-8, ll- La-8, ll-lb-8, 1 -1 -1c-8, 2-1-1-4 : Circuit breaker # 1-1-1-9: Excitation device 2 : Power storage system 2- 1-1, 2 -1-2.....2-2-m: Power storage device 2 -1 -1 -1 : Secondary battery 2 - 1-1-3, 4 : Interconnecting transformer 3, 3 a, 3 b, 3 d : upper controller 3- 1 : SOC target 値 calculation unit 3b-ll : SOC target 値 calculation unit 3 b-1-2 : power prediction 値 variation rate calculation unit -43- 201031822 3b-l-3 : switch 3 -2 : Maximum 値 • Minimum 値 Calculation Unit 3-3, 3a-3, 3b-3, 3c-3, 3d-3: Charge and Discharge Power Command Calculation Unit 3-3-1: SOC Management Department 3-3-1-1, 3-3-1-2.....3-3-1-m: charge/discharge power command calculation unit 3-3-2, 3-3-3, 3a- 3-3, 3d-3-3: Limiter 3b-3-4, 3d-3-4: Output power upper limit command calculation unit 3d-3-4-l: Energy storage calculation unit 3b-3-4-2: Output power upper limit command selection unit 3-3C-5: - Secondary delay calculation unit 3-4, 3a-4, 3b-4, 3d-4: Power limitation command calculation unit 3-4-1: Chargeable power calculation unit 3a -4-2, 3b-4-2, 3d-4-2: Minimum 値 Selection Calculation Unit 3b-4-3, 3d-4-3: Output Power Upper Limit Command Calculation Unit 3-4-1-1, 3- 4-1-2, ..., 3-4-1-m: Charging Power Calculation Unit 3-5: Charging and Discharging Power Command Assignment Unit 5: Power System 6: Power Meter 7: Power System 8: Signal Line 9: Power Generation Power forecaster

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Claims (1)

201031822 VII. Application for a patent model: 1. A wind power generation system comprising a wind power generation device group comprising one or more wind power generation devices, and a power storage system comprising one or more power storage devices; The wind power generation system includes an output power recording means for recording output power of a sum of a power generation electric power of the wind power generation device group and a charge/discharge power amount of the power storage system, and detecting a power generation power of the wind power generation device group. a generated power detecting unit; the specific period from the past to the present is regarded as the first period, and the other specific period from now to the future is regarded as the second period; and the use is recorded in the output power recording means The information on the output power of the first period and the information of the detection of the generated power detection unit to calculate the charge/discharge power command calculation means of the charge and discharge power command of the battery system in the second period, and The foregoing power storage system is in accordance with the aforementioned charging and discharging power command Charge-discharge electric power system of the charge-discharge power control means. 2. The wind power generation system according to claim 1, wherein: the wind power generation system includes means for obtaining a maximum 値 and a minimum 前述 of the output power in the first period, and And the means for obtaining the output range of the output power of the second period in the foregoing minimum period, and in the case of the second period, in the case where the power generation power of the wind power generation device group -45-201031822 escapes the output range The means for calculating the charge/discharge power command of the power storage system by the electric power that escapes from the output range. 3. The wind power generation system according to the second aspect of the invention, wherein: the wind power generation system includes means for calculating a charging rate target range of a charging rate of the power storage system, and the wind power generation device group Whether the generated electric power escapes from the above-described range of the output, or when the charging rate of the electric storage system escapes the target range of the charging rate, the electric storage system is charged and discharged. 4. The wind power generation system according to the second aspect of the invention, wherein: the wind power generation system includes: means for calculating a first time of performing a one-time delay calculation on the generated electric power of the wind power generation device group, and In the case where the first 値 is in the output range, the means for performing the charging and discharging power of the power storage system by following the output power tracking of the d wind power generation system to the first ,, and In the case where the output range is removed, the charge/discharge command of the power storage system is created by following the output power tracking of the wind power generation system to the upper limit or the lower limit of the output range. 5. The wind power generation system according to the third or fourth aspect of the patent application, wherein: -46-201031822 includes the aforementioned charging rate target range for the power storage system, which is generated by the wind power generation group The means of decision. 6. The wind power generation system according to the first or second aspect of the patent application, wherein the first period is a predetermined value of 20 minutes or less, and the second period is a predetermined value of 1 minute or less. 7. The wind power generation system as recited in claim 2, wherein: the upper limit of the output range 为 is to add the first specific 値 to the minimum 値; the lower limit 前述 of the output range is The first specific enthalpy is calculated from the maximum enthalpy subtraction; the first specific enthalpy is set to be constant in association with the allowable fluctuation range of the output power of the wind power generation system. 8. The wind power generation system according to the first or second aspect of the invention, wherein: the wind power generation system includes: a power generation power prediction that predicts a future generation power of the wind power generation device group; Means, and means for adjusting the aforementioned charging rate target range in response to the aforementioned power generation electric power prediction. 9. The wind power generation system according to claim 1 or 2, wherein: the wind power generation system includes means for creating a power limitation command for the wind power generation device group; and the wind power generation device group It has a power generation restriction means that limits the power generation to the power limit command of the previous -47-201031822. 10. The wind power generation system according to claim 1, wherein: the wind power generation system includes means for creating a power limitation command for the wind power generation device group, and obtaining the output power of the first period And the means for calculating the chargeable power of the power storage system; the wind power generation device group is provided with means for limiting the generated power of the wind power generation device group to less than the power limit command; The means for restricting the command is to use the sum of the minimum 値 and the allowable variability of the chargeable power and the allowable fluctuation range of the output power of the wind power generation system as the power limit command. 11. The wind power generation system according to claim 1, wherein: the wind power generation system includes means for calculating a power limit command of the wind power generation device group; and the wind power generation device group is provided with The power generation power of the wind power generation device group is limited to a power failure command or less; the wind power generation system is configured to hold a power generation power prediction parameter of the wind power generation system, and to generate the power according to the power generation power prediction parameter A means of limiting the change of instructions. -48- 201031822 12. For the application of the patent scope or the eleventh power generation system, wherein: the wind power generation system is provided with means for calculating a pre-calculation upper limit command, and charging operation using the foregoing power storage system and the aforementioned electric power Limit the instruction to limit the aforementioned output power to the limit command. 0 13 • As described in item 12 of the patent application, wherein: the output power upper limit command is constant, and the group's generated power is rated below , and is equal to or greater than the rated capacity of the front-end converter. 1 4. As described in item 12 of the patent application, wherein: the aforementioned output power upper limit command is adjusted to correspond to the test. In the case of claim 12, wherein the output power upper limit command is adjusted to correspond to the charging rate or the energy storage of the power storage system. The wind power generation system described in the item is an electric wind power generation device group that outputs electric power. The wind power generation system on the output electric power is a wind power generation system. The wind power generation system that changes the electric storage system. The wind power generation system that generates the electric power is the same as the electric power storage system.