CN202772599U - Power generation system - Google Patents
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- CN202772599U CN202772599U CN 201220224566 CN201220224566U CN202772599U CN 202772599 U CN202772599 U CN 202772599U CN 201220224566 CN201220224566 CN 201220224566 CN 201220224566 U CN201220224566 U CN 201220224566U CN 202772599 U CN202772599 U CN 202772599U
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Abstract
The invention discloses a power generation system. The power generation system comprises a power generation set for generating output, a first output measurement device for measuring the output of the power generation set, an energy storage system operating in cooperation with the power generation set, a second output measurement device for measuring the output of the energy storage system, and a combination process device for reporting after the power generation set and the energy storage system output. The interference of the access of the energy storage system on the output control system of the existing power generation set is avoided, and the total output of the power generation system better satisfies the requirements of the power dispatching instruction.
Description
Technical Field
The utility model relates to an electric power tech field, in particular to power generation system.
Background
The power system comprises a power grid, a generator set for providing electric energy and various electric equipment. It is desirable that the power provided by the generator set be balanced with the power consumed by the consumer in real time. Therefore, an energy storage system is connected to the generator end of the generator set to balance the electric energy provided by the generator set and the electric energy consumed by electric equipment, and the stability of the whole power system is improved.
After the energy storage system is connected to the generator end of a generator set in the power plant, the total output provided by a Remote Terminal Unit (RTU) in the power plant is changed from the original generator set output to the sum of the generator set and the energy storage system. That is, the total output provided by the power generation system is changed from the original output of the generator set to the sum of the output of the generator set and the energy storage system.
After the energy storage system is connected, how to control the output of the energy storage system is avoided, the disturbance of the original generator set output control system caused by the connection of the energy storage system is avoided, and how to enable the overall output of the power generation system to better meet the requirement of a power scheduling instruction becomes a problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a power generation system avoids because energy storage system's access is to the disturbance of original generating set control system that forces out through the control of exerting oneself to energy storage system, makes power generation system's the whole power of exerting oneself satisfy power scheduling instruction requirement better.
A power generation system, comprising: the system comprises a generator set for generating output, a first output measuring device for measuring the output of the generator set, an energy storage system for cooperating with the generator set to operate, a second output measuring device for measuring the output of the energy storage system, and merging processing equipment for reporting the output of the generator set and the output of the energy storage system; wherein,
the generator set comprises:
the generating set processing unit is used for calculating a difference value between the output of the generating set at the time of updating the power scheduling instruction and the current output of the generating set after detecting that the power scheduling instruction is updated, constructing a generating set output instruction according to the difference value, carrying out machine-furnace coordination control on the generating set output instruction and then transmitting the generating set output instruction to a furnace machine execution mechanism;
the furnace machine executing mechanism executes operation according to the output indicated in the generator set output instruction;
the energy storage system includes:
the energy storage system processing unit is used for determining the current state of the generator set according to the respective operation information of the generator set and the energy storage system after the power scheduling instruction is detected to be updated; determining a total output correction target of the power generation system according to the current state of the generator set; generating a current output instruction of the energy storage system according to the total output correction target of the power generation system;
the energy storage executing mechanism executes operation according to the output indicated in the current output instruction of the energy storage system;
the first output measuring device is used for measuring the output generated by the furnace actuating mechanism of the generator set and reporting the measurement result to the merging processing equipment;
the second output measuring device is used for measuring the output generated by the energy storage executing mechanism of the energy storage system and reporting the measurement result to the merging processing equipment;
and the merging processing equipment is used for respectively receiving the measurement results from the first output measurement device and the second output measurement device, merging the measurement results to obtain an overall output signal of the power generation system, and uploading the overall output signal to a power grid.
The generator set is a thermal power generating set, a hydroelectric generating set, a wind generating set or a gas turbine set.
The generator set comprises one or more generators; the energy storage system comprises one or more sets of energy storage systems.
The merging processing equipment is a telecontrol terminal.
Wherein the merging processing device includes:
the merging equipment is used for respectively receiving the measurement results from the first output measurement device and the second measurement device, merging the measurement results to obtain an overall output signal of the power generation system, and uploading the overall output signal to the remote control terminal;
and the telecontrol terminal is used for uploading the total output signal to a power grid.
Use the embodiment of the utility model provides a power generation system through the control of exerting oneself to energy storage system, makes exerting oneself of its simultaneous monitoring generating set and energy storage system self, need not reform transform the original control system software and hardware of generating set, has avoided because energy storage system's access is to the disturbance of the original generating set control system that exerts oneself, makes power generation system's the whole power of exerting oneself satisfy power scheduling instruction requirement better. In addition, the actual engineering cost and the additional risk brought by the modification of the unit control system are reduced. Moreover, the problems of equipment abrasion, energy consumption, greenhouse gas emission and the like of the generator set caused when the generator set frequently responds to a power scheduling command are reduced, and the running economy and environmental protection performance of the traditional generator set are improved.
Use the embodiment of the utility model provides a power generation system because energy storage system's access and withdraw from and all not influence the original control logic of generating set, consequently can not control to exert oneself to the generating set and cause the disturbance.
Use the embodiment of the utility model provides a power generation system does not increase extra centralized control and coordination unit, reduces the single fault point of unnecessary, has improved system operational reliability.
Use the embodiment of the utility model provides a power generation system, the charged state operation that can effective control energy storage system through energy storage system charge-discharge state correction is at the target value of settlement, has improved energy storage system's availability. Meanwhile, the overcharge and the overdischarge of the energy storage system are effectively avoided, and the service life of the energy storage system is prolonged.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flow chart of a method of controlling the output of an energy storage system according to an embodiment of the present invention;
FIG. 2 is a schematic logic diagram of generating an energy storage system state of charge modifier;
fig. 3 is a schematic diagram of a control logic for coordinating the response of the generator set and the energy storage system to AGC commands according to an embodiment of the present invention;
FIG. 4a is a schematic diagram of a possible structure of an energy storage system connected to a generator set;
FIG. 4b is a schematic diagram of another possible configuration of an energy storage system coupled to a generator set;
fig. 5 is a schematic diagram of a logic structure of an apparatus for controlling output of an energy storage system according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a power generation system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
After the energy storage system is connected, the total output of the generator set and the energy storage system needs to be controlled so as to better meet the requirement of a power dispatching instruction. Meanwhile, the access of the energy storage system should avoid the influence on the stability of the original generator set output control system of the generator set, the change of software and hardware of the original generator set output control system is reduced as much as possible, and the response of the original generator set to the power scheduling instruction should not be influenced under the access and exit conditions of the energy storage system.
The present invention will be described in further detail below with reference to Automatic Generation Control (AGC) as an example.
Referring to fig. 1, which is a flowchart of a method for controlling the output of an energy storage system according to an embodiment of the present invention, the embodiment is used in a power generation system, and the power generation system includes a generator set for generating output and an energy storage system for cooperating with the generator set; the method comprises the following steps:
on the side of the energy storage system,
if the power scheduling command update is not detected, the power scheduling command update can be detected in a timing or real-time circulating manner;
the two judgments in the step 101 are not in strict sequence, that is, whether the current operating state of the generator set is normal or not may be judged first, and as long as the judgment results of the two are both yes, the step 102 may be executed, and if one of the judgment results is no, the step 101 is repeatedly executed to circularly wait.
The operating states of the generator set and the energy storage system may include respective operating temperature, pressure, grid-connected connection state, power conversion device state, system fault state, and the like; the step of determining whether the respective current operating states of the generator set and the energy storage system are normal may specifically be:
respectively acquiring the respective operating temperature, pressure, grid connection state and system fault state of the generator set and the energy storage system;
when the operating temperature and the operating pressure of the generator set and the energy storage system are respectively in the set operating ranges and are respectively in a grid-connected connection state, and no system fault exists, judging that the current respective operating states of the generator set and the energy storage system are normal;
the method comprises the following specific steps:
if the output of the generator set does not start the generator set regulation dead zone after the power scheduling instruction is updated, the generator set is currently in a regulation response state;
if the generator set exits the regulation dead zone and does not enter a power dispatching instruction steady-state area, the generator set is currently in an output regulation state;
and if the output of the generator set enters a power dispatching instruction steady-state area, the generator set is in a steady-state output state currently.
103, determining a total output correction target of the power generation system according to the current state of the generator set;
if the generator set is in the regulation response state, the total output correction target of the power generation system is the sum of the output power of the generator set at the time of updating the power scheduling instruction and the power of the regulation dead zone of the generator set;
and if the generator set is in an output adjusting state or a steady-state output state, the total output correction target of the power generation system is the power indicated in the power scheduling instruction.
104, generating an output instruction of the energy storage system according to the total output correction target of the power generation system;
specifically, the current output of the generator set may be subtracted from the total output correction target of the power generation system, and the current output instruction of the energy storage system may be generated according to the obtained output value.
And 105, executing operation according to the output indicated in the energy storage system output instruction, namely outputting the output indicated in the energy storage system output instruction.
On the side of the generator set,
the existing control mode is kept unchanged, specifically, a power dispatching instruction such as an AGC instruction is received, a generator set output signal is monitored, and the generator set is controlled to follow the AGC instruction.
Therefore, the output of the energy storage system is controlled, so that the output of the generator set and the output of the energy storage system are simultaneously monitored, the original generator set is not required to be changed, the disturbance of the original generator set output control system due to the access of the energy storage system is avoided, the output of the generator set and the output of the energy storage system can be effectively coordinated, and the overall output of the power generation system can better meet the requirement of a power dispatching instruction.
It should be noted that, after step 101 and before step 102, the method may further include: and judging whether the current output regulation direction of the generator set is consistent with the regulation direction indicated in the power scheduling command, and executing the step 102 if the current output regulation direction of the generator set is consistent with the regulation direction indicated in the power scheduling command.
The step of judging whether the current output adjustment direction of the generator set is consistent with the adjustment direction indicated in the power scheduling instruction or not is determined according to the output of the generator set at the time of updating the power scheduling instruction, the current output of the generator set and the output indicated in the power scheduling instruction, and specifically comprises the following steps:
acquiring the output of the generator set at the moment of updating the power scheduling instruction;
acquiring the current output of the generator set;
if the direction indicated by the difference value of the current output of the generator set and the output of the generator set at the time of updating the power scheduling instruction is consistent with the positive and negative directions of the difference value of the output indicated in the power scheduling instruction and the output of the generator set at the time of updating the power scheduling instruction, the adjustment directions are determined to be consistent, otherwise, the adjustment directions are inconsistent.
For example, when the output of the generator set at the time of updating the power scheduling command is 100kw, the current output of the generator set is 102kw, and the output indicated in the power scheduling command is 110kw, 102 = +2, and 110 = +10, where the positive and negative directions of +2 and +10 are the same, it is determined that the adjustment directions are the same.
By confirming that the adjusting direction of the generator set is consistent with the adjusting direction indicated in the power scheduling instruction before step 102, the pressure of the energy storage system on correcting the system output is reduced, and the energy storage system with smaller capacity can be used for meeting the long-time operation requirement.
It should be noted that after step 103, that is, after determining the overall output correction target of the power generation system, the method may further include: and calculating the energy storage system charging state correction according to the charging state of the energy storage system. The charging state of the energy storage system refers to the percentage of the energy stored in the battery memory in the energy storage system to the total stored energy of the battery memory. Because the energy storage system may provide limited energy storage capacity, the energy storage system may not provide further charging capability when in a fully charged state, whereas the energy storage system may not provide further discharging capability when in a fully discharged state. When the charging state of the energy storage system is higher than the set target running state, the correction direction is positive; conversely, when the energy storage system state of charge is below the set target, the correction direction is negative. The target interval of the charging state of the energy storage system can be different, such as (30% -70%) or (0% -30%), according to different energy storage systems.
Referring to fig. 2, a schematic logic diagram is shown for generating an energy storage system state of charge modifier. Specifically, a target operation charging state signal of the energy storage system and an actual charging state feedback signal of the energy storage system are combined and subjected to difference processing, a difference signal is output through a Proportional Integral (PI) controller, and the output value is the charging state correction quantity of the energy storage system.
In general, it is desirable to control the state of charge of the energy storage system in real time within a reasonable usable interval, for example, to control the energy storage system to be near 50% state of charge. When the charging and discharging state of the energy storage system is higher than a target value, for example 50%, outputting a forward correction instruction, and setting a forward deviation of an output correction target; otherwise, outputting a negative correction instruction, and setting the negative deviation of the output correction target. Through the active adjustment of the AGC instruction response error, the charging state of the energy storage system is effectively controlled.
After the energy storage system charge state correction is calculated, generating an energy storage system output instruction according to the total output correction target of the power generation system, the energy storage system charge state correction and the current output of the generator set, specifically: the step of generating the output instruction of the energy storage system according to the total output correction target of the power generation system comprises the following steps:
and subtracting the current output of the generator set from the sum of the total output correction target of the power generation system and the charge state correction amount of the energy storage system, and generating a current output instruction of the energy storage system according to the obtained output value.
By calculating the correction quantity of the charging state of the energy storage system, the energy storage system can be reliably kept in a normal operation interval, the overcharge and the overdischarge of the energy storage system are effectively avoided, the utilization rate of the energy storage system is improved, and the service life of the energy storage system is prolonged.
Referring to fig. 3, it is a schematic diagram of a control logic of the generator set and the energy storage system in coordination response to an AGC command according to an embodiment of the present invention.
On the side of the generator set,
specifically, a generator set output control system receives an AGC instruction and a feedback signal of the current output of the generator set, combines the output indicated in the AGC instruction and the output in the feedback signal, constructs the current output instruction of the generator set to control the output of the generator set to follow the AGC instruction, transmits the constructed output instruction of the generator set to a furnace execution mechanism after the engine-furnace Coordination Control (CCS), and executes operation according to the output indicated in the output instruction of the generator set by the furnace execution mechanism, namely, outputs the output indicated in the output instruction of the generator set.
On the side of the energy storage system,
the method comprises the steps that an energy storage system output control system receives an AGC instruction, a feedback signal of the current output of a generator set and a feedback signal of the current output of the energy storage system, judges whether the current output adjusting direction of the generator set is consistent with the adjusting direction indicated in a power scheduling instruction (optional in the step) or not under the condition that the current running states of the generator set and the energy storage system are normal after a power scheduling instruction is detected to be updated, and determines the current state of the generator set when the adjusting directions are consistent; determining a total output correction target of the power generation system according to the current state of the generator set; calculating the energy storage system charge state correction (optional in the step); generating a current output instruction of the energy storage system according to the total output correction target of the power generation system; and the energy storage executing mechanism executes operation according to the output indicated in the current output instruction of the energy storage system, namely, the output indicated in the output instruction of the energy storage system is output.
As can be seen from fig. 3, the output control system of the power generating unit does not need to monitor the output of the energy storage system, and for the output control system of the power generating unit, the energy storage system operates as an external black box, and whether the energy storage system is connected or not does not affect the output control system of the original power generating unit, so that the interference of the added energy storage system on the output control of the thermal power generating unit is avoided. That is, no matter whether the energy storage system is connected or not, the original output control system of the generator set independently controls the output of the generator set to track the AGC instruction, and the output of the energy storage system is not monitored and managed; the energy storage system is used as an energy scheduling system of the power generation system, only the output of the energy storage system is controlled, and when the generator set is in an AGC automatic state, the generator set is actively matched, and the output curve of the generator set is corrected.
Specifically, under the condition that the energy storage system is connected, the energy storage system provides output according to the output instruction of the energy storage system, and meanwhile, the combined processing equipment such as RTU equipment feeds back the output signal obtained by combining the generator set and the energy storage system to the power grid dispatching system. The output of the energy storage system is compensated and corrected, so that the AGC command response effect is improved; and under the condition that the energy storage system is out of operation, the original output control of the generator set is not influenced and the generator set still automatically follows the AGC command. The output of the energy storage system is zero, the combined signal of the RTU equipment is equal to the output of the generator set, and the response effect of the generator on the AGC command is not influenced.
The embodiment of the utility model also provides a device for controlling the energy storage system to exert oneself, refer to fig. 5, in the power generation system, the power generation system includes the generating set used for producing exerting oneself, the energy storage system used for cooperating the generating set operation; on the energy storage system side, the apparatus comprises:
an operation state judgment unit 501, configured to judge whether current respective operation states of the generator set and the energy storage system are normal according to respective operation information of the generator set and the energy storage system after detecting that the power scheduling instruction is updated, and notify the generator set state determination unit if the current respective operation states are both normal,
a generator set state determination unit 502, configured to determine a current state of a generator set;
a power generation system output correction unit 503, configured to determine a total output correction target of the power generation system according to the current state of the power generator set;
the energy storage system output instruction generating unit 504 is configured to generate a current output instruction of the energy storage system according to the total output correction target of the power generation system;
and the energy storage system execution unit 505 is configured to execute an operation according to the output indicated in the energy storage system output instruction.
The energy storage system output instruction generating unit 504 may specifically include:
a first calculating subunit (not shown) for applying the power generation system total output correction target minus the current output of the generator set,
and an instruction generating subunit (not shown) configured to generate a current output instruction of the energy storage system according to the obtained output value.
The apparatus in fig. 5 may further include:
and an adjusting method determining unit (not shown) for determining whether the current output adjusting direction of the generator set is consistent with the adjusting direction indicated in the power scheduling instruction when the generator set and the energy storage system are both running normally, and notifying the generator set state determining unit if the current output adjusting direction of the generator set is consistent with the adjusting direction indicated in the power scheduling instruction.
The apparatus in fig. 5 may further include:
an energy storage system charging state correction calculation unit (not shown) for calculating an energy storage system charging state correction according to a charging state of the energy storage system;
in this case, the energy storage system output instruction generating unit 504 may include:
a second calculating subunit (not shown in the figure), configured to subtract the current output of the generator set from the sum of the total output correction target of the power generation system and the charge state correction amount of the energy storage system;
and an instruction generating subunit (not shown) configured to generate a current output instruction of the energy storage system according to the obtained output value.
Therefore, the output of the energy storage system is controlled, so that the output of the generator set and the output of the energy storage system are simultaneously monitored, the original generator set is not required to be changed, the disturbance of the original generator set output control system due to the access of the energy storage system is avoided, the output of the generator set and the output of the energy storage system can be effectively coordinated, and the overall output of the power generation system can better meet the requirement of a power dispatching instruction.
The embodiment of the utility model provides a still provide a power generation system, see figure 6, include: the system comprises a generator set 610 for generating output, a first output measuring device 620 for measuring the output of the generator set, an energy storage system 630 for cooperating with the operation of the generator set, a second output measuring device 640 for measuring the output of the energy storage system, and a merging processing device 650 for reporting the output of the generator set and the output of the energy storage system; wherein,
the generator set 610 includes:
the generator set processing unit 611 is used for calculating a difference value between the output of the generator set at the time of updating the power scheduling instruction and the current output of the generator set after detecting that the power scheduling instruction is updated, constructing a generator set output instruction according to the difference value, performing machine-furnace coordination control on the generator set output instruction, and transmitting the generator set output instruction to a furnace machine execution mechanism;
a furnace actuator 612 that performs operations according to the output indicated in the generator set output command;
the energy storage system 630 includes:
the energy storage system processing unit 631 is configured to, after it is detected that the power scheduling instruction is updated, determine whether current respective operating states of the generator set and the energy storage system are normal according to respective operating information of the generator set and the energy storage system, and if yes, determine a current state of the generator set; determining a total output correction target of the power generation system according to the current state of the generator set; generating a current output instruction of the energy storage system according to the total output correction target of the power generation system;
an energy storage executing mechanism 632 configured to execute an operation according to the output indicated in the current output instruction of the energy storage system;
the first output measuring device 620 is configured to measure the output generated by the furnace actuating mechanism of the generator set, and report the measurement result to the merging processing device;
the second output measuring device 640 is configured to measure the output generated by the energy storage executing mechanism of the energy storage system, and report the measurement result to the merging processing device;
and the merging processing device 650 is configured to receive the measurement results from the first output measurement device and the second output measurement device, merge the measurement results to obtain an overall output signal of the power generation system, and upload the overall output signal to the power grid.
The energy storage system processing unit 631 is further configured to, when the generator set and the energy storage system are both operating normally, determine whether a current output adjustment direction of the generator set is consistent with an adjustment direction indicated in the power scheduling instruction, and determine a current state of the generator set if the current output adjustment direction of the generator set is consistent with the adjustment direction indicated in the power scheduling instruction.
The energy storage system processing unit 631 is further configured to calculate an energy storage system charging state correction amount according to the charging state of the energy storage system after determining the overall output correction target of the power generation system; generating a current output instruction of the energy storage system according to the total output correction target of the power generation system specifically comprises the following steps: subtracting the current output of the generator set from the sum of the total output correction target of the power generation system and the charge state correction amount of the energy storage system; and generating a current output instruction of the energy storage system according to the obtained output value.
The way for the energy storage system processing unit 631 to determine the current state of the generator set includes:
if the output of the generator set does not start the generator set regulation dead zone after the power scheduling instruction is updated, determining that the generator set is currently in a regulation response state;
if the generator set exits the regulation dead zone and does not enter a power dispatching instruction steady-state area, determining that the generator set is currently in an output regulation state;
and if the output of the generator set enters a power dispatching instruction steady-state area, determining that the generator set is in a steady-state output state currently.
The way for the energy storage system processing unit 631 to determine the overall output correction target of the power generation system according to the current state of the generator set includes:
if the generator set is in the regulation response state, the total output correction target of the power generation system is the sum of the output power of the generator set at the time of updating the power scheduling instruction and the power of the regulation dead zone of the generator set;
and if the generator set is in an output adjusting state or a steady-state output state, the total output correction target of the power generation system is the power indicated in the power scheduling instruction.
And if the merging processing equipment is a telecontrol terminal, respectively receiving the measurement results from the first output measurement device and the second output measurement device by a telecontrol terminal (RTU), merging the measurement results to obtain an overall output signal of the power generation system, and uploading the overall output signal to a power grid.
Wherein the merging processing device includes: the device and the telemechanical terminal are combined, and at this time,
the merging equipment is used for respectively receiving the measurement results from the first output measurement device and the second measurement device, merging the measurement results to obtain an overall output signal of the power generation system, and uploading the overall output signal to the remote control terminal; for example, the merging device may be a hardware device such as a transmitter, and signal merging is realized through a transmitter link, that is, superposition and merging of the unit output signal and the energy storage system output signal are realized through a hardware mode, but the calculation principle is completely the same as that of software implementation.
And the telecontrol terminal is used for uploading the total output signal to a power grid.
Use the embodiment of the utility model provides a pair of power generation system through the control of exerting oneself to energy storage system, makes exerting oneself of its simultaneous monitoring generating set and energy storage system self, coordinates generating set and energy storage system's exerting oneself, provides better power scheduling instruction response effect to, need not reform transform the original control system software and hardware of generating set, reduced actual engineering cost and reformed transform the extra risk that brings to unit control system.
Use the embodiment of the utility model provides a power generation system because energy storage system's access and withdraw from and all not influence the original control logic of generating set, consequently can not control to exert oneself to the generating set and cause the disturbance.
Use the embodiment of the utility model provides a power generation system does not increase extra centralized control and coordination unit, reduces the single fault point of unnecessary, has improved system operational reliability.
Use the embodiment of the utility model provides a power generation system, the charged state operation that can effective control energy storage system through energy storage system charge-discharge state correction is at the target value of settlement, has improved energy storage system's availability. Meanwhile, the overcharge and the overdischarge of the energy storage system are effectively avoided, and the service life of the energy storage system is prolonged.
It should be noted that, for all the above embodiments, the generator set may be a thermal power generator set, a hydroelectric power generator set, a wind power generator set, or a gas turbine set in practical application.
It should be noted that, for all the above embodiments, the application of the power scheduling instruction may be applied to various active power and reactive power scheduling applications, such as AGC application, frequency modulation application, wind turbine generator system output power smoothing application, unit output error compensation application, or rotation backup application. That is, the power scheduling command is an active power scheduling command or a reactive power scheduling command.
It should be noted that, the present application does not limit the access position of the energy storage system, and any possible access position may be applied to the present application. For all the embodiments, the access point of the energy storage system in practical application may be all feasible access points which meet the capacity requirement between the generator outlet end closed bus and the low-voltage side of the step-up transformer, including the generator end bus, the high-voltage side of the high-voltage plant, the excitation high-voltage side, the low-voltage side of the main transformer, and the like, and may also be feasible access points which meet the capacity requirement from the high-voltage side of the step-up transformer to the transformer substation of the power plant. In addition, the access point of the energy storage system in practical application can be a low-voltage side of a high plant, and the scheme reduces the installation difficulty and construction cost of the measuring unit of the energy storage system due to the fact that a generator terminal closed bus does not need to be opened, but the capacity of the energy storage system is limited by the residual capacity of the high plant. As shown in fig. 4a, the access point of the energy storage system is the low-voltage side of the main transformer and is directly connected to the bus; in the connection mode shown in fig. 4b, the access point of the energy storage system is the low-voltage side of the high-voltage plant and is not directly connected to the bus.
It should be noted that the energy storage system may be based on a Programmable Logic Controller (PLC), a Personal Computer (PC), or other Programmable Controller platform;
it should be noted that the communication between the energy storage system and the generator set output control system may be connected through various communication optical fibers, or may be connected through an input/output control cable.
It should be noted that, for all the above embodiments, the number of the generator sets and the energy storage systems is not limited, for example, a single generator set and a single energy storage system operate cooperatively, multiple generator sets and a single energy storage system operate cooperatively, a single generator set and multiple energy storage systems operate cooperatively, or multiple generator sets and multiple energy storage systems operate cooperatively. In the configuration scheme of difference, only need as the combination operation with all generating set, energy storage system is as the operation of unified combination, all is applicable to control system and method.
It should be noted that the control method of the energy storage system state of charge correction command may adopt PI feedback control, and may also adopt other feasible control methods, such as Bang-Bang control with dead zone, and the like.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (5)
1. A power generation system, comprising: the system comprises a generator set for generating output, a first output measuring device for measuring the output of the generator set, an energy storage system for cooperating with the generator set to operate, a second output measuring device for measuring the output of the energy storage system, and merging processing equipment for reporting the output of the generator set and the output of the energy storage system; wherein,
the generator set comprises:
the generating set processing unit is used for calculating the difference value between the generating set output at the time of updating the power scheduling instruction and the current generating set output after detecting that the power scheduling instruction is updated, constructing a generating set output instruction according to the difference value, and transmitting the generating set output instruction to the furnace execution mechanism after performing furnace coordination control on the generating set output instruction;
the furnace machine executing mechanism executes operation according to the output indicated in the generator set output instruction;
the energy storage system includes:
the energy storage system processing unit is used for determining the current state of the generator set according to the respective operation information of the generator set and the energy storage system after the power scheduling instruction is detected to be updated; determining a total output correction target of the power generation system according to the current state of the generator set; generating a current output instruction of the energy storage system according to the total output correction target of the power generation system;
the energy storage executing mechanism executes operation according to the output indicated in the current output instruction of the energy storage system;
the first output measuring device is used for measuring the output generated by the furnace actuating mechanism of the generator set and reporting the measurement result to the merging processing equipment;
the second output measuring device is used for measuring the output generated by the energy storage executing mechanism of the energy storage system and reporting the measurement result to the merging processing equipment;
and the merging processing equipment is used for respectively receiving the measurement results from the first output measurement device and the second output measurement device, merging the measurement results to obtain an overall output signal of the power generation system, and uploading the overall output signal to a power grid.
2. The power generation system of claim 1, wherein the power generation unit is a thermal power unit, a hydroelectric power unit, a wind power unit, or a gas turbine unit.
3. The power generation system of claim 1,
the generator set comprises one or more generators;
the energy storage system comprises one or more sets of energy storage systems.
4. The power generation system of claim 1,
the merging processing equipment is a telecontrol terminal.
5. The power generation system of claim 1, wherein the consolidation processing device comprises:
the merging equipment is used for respectively receiving the measurement results from the first output measurement device and the second measurement device, merging the measurement results to obtain an overall output signal of the power generation system, and uploading the overall output signal to the remote control terminal;
and the telecontrol terminal is used for uploading the total output signal to a power grid.
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| CN 201220224566 CN202772599U (en) | 2012-05-18 | 2012-05-18 | Power generation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220224566 CN202772599U (en) | 2012-05-18 | 2012-05-18 | Power generation system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682379A (en) * | 2013-12-03 | 2015-06-03 | 北京睿能世纪科技有限公司 | Network load dispatching instruction response method and network load dispatching instruction response system |
| CN104682380B (en) * | 2013-12-03 | 2017-02-15 | 北京睿能世纪科技有限公司 | Power grid load dispatching instruction response method and power grid load dispatching instruction response system |
| CN107612005A (en) * | 2017-10-27 | 2018-01-19 | 河北冀研能源科学技术研究院有限公司 | Energy-storage system collaboration Steam Turbine governing stage full load operation method and system in power station |
-
2012
- 2012-05-18 CN CN 201220224566 patent/CN202772599U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682379A (en) * | 2013-12-03 | 2015-06-03 | 北京睿能世纪科技有限公司 | Network load dispatching instruction response method and network load dispatching instruction response system |
| CN104682380B (en) * | 2013-12-03 | 2017-02-15 | 北京睿能世纪科技有限公司 | Power grid load dispatching instruction response method and power grid load dispatching instruction response system |
| CN107612005A (en) * | 2017-10-27 | 2018-01-19 | 河北冀研能源科学技术研究院有限公司 | Energy-storage system collaboration Steam Turbine governing stage full load operation method and system in power station |
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