JP2019068667A - Charge discharge control device - Google Patents

Abstract

To provide a charge discharge control device capable of charging and discharging a power conditioner efficiently, even if the unit type of installed power conditioner or the power consumption is different in each building.SOLUTION: A charge discharge control device includes a second power conditioner PC2 for charging and discharging a power storage device 2, a measurement device 4 for measuring power consumption of a load group 3 and power generation amount of a solar cell panel 1, a control unit 6 for controlling operation of the second power conditioner PC2, and a consumption power amount prediction unit 61 and a power amount prediction unit 62 for predicting the consumption power amount of every time zone of the load group 3, and generation power amount of every time zone of the solar cell panel 1, on the basis of the measurement values in the past stored in respective databases 51-55. The control unit 6 has an operation planning unit 65 planning the time zone for charging and discharging the power storage device 2, on the basis of the prediction values of power consumption and generation power amount, and the output efficiency of the second power conditioner PC2.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a charge and discharge control device.

Conventionally, there is known a system including a power generation device, a power storage device, and a power conditioner, controlling output of electric power generated by the power generation device and charging of the generated power to the power storage device, and controlling discharge of the power storage device For example, refer to Patent Document 1).
The prior art described in Patent Document 1 is capable of data communication with the power conditioner through a communication interface device and a power conditioner that converts DC power supplied from the first solar cell module into AC power. Power generation monitoring system. And, the solar cell module is provided with the second solar cell module so that the power conditioner can always operate at the maximum capacity even if the generated power of each solar cell module does not reach 100% of the capacity due to the weather Power generation capacity is set large, and the power conversion is controlled in real time.

Patent No. 6017715 gazette

By the way, in the power conditioner, the output efficiency changes depending on the charge amount and the discharge amount, and the characteristics also differ depending on the model of the power conditioner.
For example, as in the above-mentioned prior art, there are cases where the case where the power conditioner is operated at the maximum output is the most efficient. As an example of such characteristics, in a power conditioner with a maximum output of 2 kVA, the efficiency is highest when charging and discharging at 2 kVA, and the efficiency decreases when charging and discharging at a power lower than 2 kVA. . In this case, for example, the efficiency is about 95% at the maximum output, whereas it is about 75% at the low output.

However, not all power conditioners are most efficient when operated at maximum output as described above. For example, there are some that are most efficient near the median of the maximum output, and some that are most efficient at the time of low power operation.
Therefore, when the power conditioner is controlled to always have the maximum output as in the above-mentioned prior art, the efficiency may be deteriorated depending on the type of the power conditioner. Also, in order to always drive the power conditioner at the maximum output, it is necessary to set the maximum capacity of the power generation device high, which makes the device large-scaled, resulting in high cost.

Furthermore, although the above-mentioned prior art is an invention of a system for power generation, when it is used in an environment where home-generated power and discharged power are consumed at home, the charge / discharge amount is the power consumption and the power load Because of the change, the operation can not always be performed in the efficient area of the power conditioner.
For example, in terms of the storage capacity of 5 kWh, 4.75 kWh can be used if discharge operation is performed near the rated output with maximum efficiency. However, discharge operation with low power load and low output results in operation with the minimum efficiency. There are cases where the amount used is around 3.75 kWh. In this case, although the amount of charged power is the same, the usable power decreases by about 1 kWh. In fact, since there is also an influence of the efficiency at the time of charge, if the efficiency at the time of charge is low, the efficiency may be further lowered when the total efficiency by charge and discharge is considered.

  Therefore, the charge and discharge control device of the present disclosure efficiently charges and discharges the power conditioner even if the type of the installed power conditioner is different or the power consumption (power load) is different for each building. It is an object of the present invention to provide a charge / discharge control device capable of

In order to achieve the above object, the charge and discharge control device of the present disclosure
A power generation device and a storage device installed in a building;
A power load that consumes power in the building;
A power conditioner that charges the power storage device with electric power generated by the power generation device and discharges the power storage device from the power storage device to the power load;
A measuring device for measuring the amount of power consumption of the power load and the amount of power generation of the power generation device;
A control device that controls the operation of the power conditioner;
A storage unit that stores measurement values of the measurement device and stores output efficiency information according to a model of the power conditioner;
A prediction unit that predicts the power consumption for each time zone of the future power load and the power generation for each time zone of the power generation device based on the past measured values stored in the storage unit;
Equipped with
The control device is a charge and discharge control device having an operation plan unit that plans a time zone in which the power storage device performs charge and discharge based on the value predicted by the prediction unit and the output efficiency information of the power conditioner. .

The charge and discharge control device of the present disclosure predicts the amount of power consumption and the amount of power generation for each time zone in a building, and operates the power conditioner based on the predicted value and the output efficiency information of the model of the power conditioner. Create a plan.
Therefore, even if the type of the installed power conditioner differs or the amount of power consumption differs depending on the building, the power conditioner can be charged and discharged efficiently.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole system figure which shows typically the whole structure of the power control system which implements the charging / discharging control apparatus of Embodiment 1 of this invention. It is a block diagram which shows the structure by the side of the management server in the said power control system. It is a flow chart which shows a flow of processing from prediction of consumption of electricity and generation of electricity by the power control system to preparation of an operation plan. It is a flowchart which shows the flow of a process of preparation of a discharge operation plan. It is a flow chart which shows a flow of processing of preparation of a charge driving plan. It is priority explanatory drawing which shows an example of the relationship between power consumption and the priority time slot | zone of discharge operation. It is priority explanatory drawing which shows an example of the relationship between power consumption, electric power generation, surplus electric energy, and the priority time slot of charging power operation.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1
First, the entire configuration of the power control system of the first embodiment will be described with reference to FIG. In this power control system, houses H1, H2, H3, ..., HX as buildings to be controlled supply power from a grid power network such as cogeneration facilities installed at power plants of power companies and in each area It is connected to the grid system E which is a power network for receiving. In the following description, when a specific one of the houses H1, ..., HX is not pointed out, it is simply referred to as a house H.

Each house H also includes a solar cell panel 1 as a solar power generation device, a power storage device 2 for temporarily storing power, a power conditioner PC, and a controller CL. In addition, each house H is set as the same structure, and the house HX is represented as a representative in the figure, and the structure is shown in detail.
The house H has a load group 3. The load group 3 has a plurality of power loads that operate by consuming power. As this electric power load, as shown in FIG. 2, it has at least a hot water supply device 31 and an air conditioner 32, and further, a lighting device (not shown) such as a lighting stand and a ceiling light, a household appliance device such as a refrigerator and a television (not shown) Illustration etc. are included.

In the first embodiment, as the power conditioner PC shown in FIG. 1, the first power conditioner PC1 and the second power conditioner PC2 are shown separately, but they are integrated. May be
The first power conditioner PC1 converts DC power generated by the solar cell panel 1 into AC power and supplies the AC power to the load group 3 of the house H.
The second power conditioner PC2 generates alternating current power generated by the solar cell panel 1 and converted into alternating current by the first power conditioner PC1, and alternating current supplied from an external grid E to the house H via the distribution board 20. Electric power is converted into direct current power to charge the storage device 2.

The power from the external grid E can be supplied to the load group 3 through the distribution board 20. On the other hand, the AC power supplied from the solar cell panel 1 or the storage device 2 through the power conditioner PC can be supplied to the load group 3 through the distribution board 20 and sold to the grid system E. Is possible.
Further, the controller CL controls the operation of the water heater 31 and the air conditioner 32 in the load group 3, the operation of the power conditioner PC, and the execution of the above-mentioned sales and purchase of electricity.

  Each house H is connected to the management server 5 via the communication network N such as the Internet, and transmission and reception of data such as measurement values and transmission and reception of control signals such as an operation plan to be described later are performed with the management server 5. To be done.

  FIG. 2 is a block diagram showing the configuration of the power control system of the first embodiment. This power control system shows a configuration disposed in each of the houses H and a configuration disposed in the management server 5.

First, the configuration of the house H side to be controlled will be described.
The house H includes the solar cell panel 1, the storage device 2, and the load group 3 as described above.
The solar cell panel 1 is a device that converts sunlight into electric power and generates electric power by using a solar cell. The solar cell panel 1 can supply power only in a time zone that can receive sunlight. Further, DC power generated by the solar cell panel 1 is converted into AC power by the first power conditioner PC1, supplied to the load group 3, and consumed.

  On the other hand, power storage device 2 is connected to second power conditioner PC 2 to control storage (charging) and discharging. In this storage and discharge control, for example, the storage device 2 stores external power at a low price such as late-night power supplied from an external grid E or power generated by the solar cell panel 1. Furthermore, in the present embodiment, of the power generated by the solar cell panel 1, all surplus power, which is power not consumed by the user, is charged.

  The specifications such as the capacity of the power generation amount of the solar cell panel 1 installed in the house H, the specifications such as the charge and discharge capacity of the power storage device 2, the capacity of the power conditioner PC and the output efficiency characteristics It is stored in a residence information database 51 described later. The specifications such as the capacity and rated output of the stored power of the power storage device 2 are also stored in a residence information database 51 described later of the management server 5.

  The load group 3 provided in the house H may include an electric car or a plug-in hybrid car (not shown). The electric vehicle and the plug-in hybrid vehicle can be used as the storage device 2 as a load when charging for traveling and when discharging for the load of the house H.

  Furthermore, the measuring device 4 is provided in the house H. The measuring device 4 measures the actual amount of power generation of the solar cell panel 1 installed in the house H, and also measures the amount of power consumed by the load group 3 installed in the house H.

  In addition, measurement of the power consumption by the measuring device 4 can be performed by integrating | accumulating at arbitrary time intervals, such as 1 second unit, 1 minute unit, and 1 hour unit. Then, the data of the measured value measured by the measuring device 4 is stored in the power history database 52 described later of the management server 5.

Next, the configuration on the side of the management server 5 connected via the houses H and the communication network N (see FIG. 1) will be described.
The management server 5 includes a communication unit 71, a control unit 6 that performs various controls, a residence information database (DB) 51 as a storage unit, a power consumption history database (DB) 52, a power price database (DB) 53, and weather. A database (DB) 54 and an operation pattern database (DB) 55 are provided.

  The communication unit 71 sends the specifications, measurement values, processing requests and the like of various facilities transmitted from the house H to the control unit 6 of the management server 5. Furthermore, the communication unit 71 directs the residence H to data stored in the various databases 51, 52, 53, 54, 55, calculation processing results (including an operation plan) performed by the control unit 6, an update program, etc. It has a sending function.

  House information database 51, house code (identification number) of each house H, address associated with the house code, construction year, insulation performance, floor plan, electrical wiring, used members, specification of solar cell panel 1 (generation capacity Information such as specifications of the power storage device 2 (storage capacity, rated output), specifications of the power conditioner PC (model, capacity, efficiency characteristics), etc. are stored.

In the power history database 52, measurement data of power consumption per unit time measured in each house H, measurement data of power generation amount per unit time in the solar cell panel 1, measurement data of charge and discharge amounts in the power storage device 2 Are received via the communication unit 71 and stored.
Furthermore, the measurement history of each of these power amounts is stored for each unit time as described above, and is stored in association with calendars such as days of the week and weather data (solar radiation amount, air temperature). In the power history database 52, the power consumption of the air conditioning load such as the air conditioner 32 and the hot water supply load such as the hot water supply apparatus 31 that are easily affected by weather conditions such as air temperature, and others that are not easily affected by weather conditions such as air temperature And the power consumption of each load are classified and stored according to load. In addition, the power generation amount and the charge and discharge amount are also stored in association with meteorological data (the amount of solar radiation, the temperature).

The power price database 53 stores information on the power price (the purchase price viewed from the resident side) that changes according to the time of the external power set by the power company or the like.
That is, the power price database 53 stores the time when the power price changes and the power price (the purchase price as viewed from the receiving side) of each time zone. Further, in the power price database 53, there is also stored a price at which a power company or the like buys the power generated by the solar cell panel 1 (the selling price as viewed from the resident).

The weather database 54 stores the next day's weather forecast data such as the temperature and the amount of solar radiation all over the country where each house H is received from the server (not shown) such as the Japan Meteorological Agency or a weather forecast company via the communication network N There is. Further, the weather database 54 stores momentary actual weather data, weather data such as temperature, humidity, and sunshine amount as past data.
In the driving pattern database 55, various driving patterns of the load group 3 and the storage device 2 installed in each house H are stored in association with the weather data.

  The control unit 6 prepares an operation plan for charge and discharge of the power storage device 2 and sets the hot water storage operation time by the hot water supply device 31. The power consumption prediction unit 61, the generated power prediction unit 62, surplus power An amount calculating unit 63, a storage battery chargeable capacity calculating unit 64, and an operation planning unit 65 are provided.

  The power consumption prediction unit 61 predicts power consumption for each predetermined time zone of the house H on the next day (every hour in the first embodiment). The power consumption prediction unit 61 predicts the power consumption for each time zone of the air conditioning load and the hot water supply load that is susceptible to weather conditions such as air temperature based on the history data of the power consumption in the past and the weather data . In addition, the amount of power consumption for each time zone of other loads that are not easily affected by weather conditions such as air temperature is predicted based on historical data in the past. Then, the two power consumption amounts are summed to predict the power consumption for each time zone of the house H.

  Specifically, in predicting the power consumption of the air conditioning load and the hot water supply load for each predetermined time, referring to the weather forecast data of the next day such as the air temperature stored in the weather database 54, as shown in FIG. The operation pattern data corresponding to the weather data referred to in the past history data is referred to (step S101), and the power consumption per hour of the air conditioning load and the hot water supply load is predicted (step S102). In predicting the power consumption of the other loads by time, referring to the history data of the past power consumption stored in the power history database 52 by category and predicting the power consumption of the other loads by time (Step S103). Then, the predicted value A1 of the power consumption of the air conditioning load and the hot water supply load affected by the weather condition calculated in step 102 and the power consumption B1 of the other loads calculated in step S103 are added to make The power consumption for each time zone is predicted (step S104).

The power generation amount prediction unit 62 predicts the power generation amount (see FIG. 7) for each time zone (every hour in the first embodiment) of the solar cell panel 1 on the next day.
The prediction of the power generation amount for each time zone of the solar cell panel 1 is performed based on the weather forecast data and the history data of the past generated power amount associated with the past weather data. That is, while reading weather forecast data (in particular, the amount of solar radiation) of the next day stored in the weather database 54, history data of the amount of generated energy associated with past weather data (amount of solar radiation) common to the weather forecast data is read . Then, based on the read data, the predicted value of the generated energy for each time slot of the next day is obtained (step 105). The predicted value of the power generation amount is a positive value in the sunshine time zone, for example, and is 0 in the nighttime without sunshine, as indicated by the change in the solar power generation amount in FIG. 7.

  In the first embodiment, power storage device 2 is charged with surplus power which is a value obtained by subtracting power consumption (A1, B1) from generated power (Z). However, the present invention is not limited to this, and as shown in steps S201 to S203 of FIG. 3, the hot water supply operation can also be performed using the surplus power obtained by subtracting the consumed energy (A1, B1) from the generated energy (Z). In this case, the power consumption C1 of the hot water supply load due to the surplus power is also added as the power consumption.

The surplus power amount calculation unit 63 subtracts the predicted power consumption amount from the predicted power generation amount for each time zone to calculate the surplus power amount for each time zone.
Storage battery chargeable capacity calculation unit 64 calculates the chargeable capacity of power storage device 2. The maximum value of the chargeable capacity is a value obtained by subtracting the lower limit remaining capacity (lower limit value) from the fully charged amount (100%).
Further, the lower limit remaining capacity (lower limit value) of power storage device 2 is not limited to the value at which the remaining amount of power storage becomes zero. For example, since it is known that the life will be shortened if all the power stored in the storage device 2 is used up, 97% is made the lower limit remaining capacity, or 70% is made the lower limit remaining capacity in preparation for sudden power failure etc. Can be

Then, charging of power storage device 2 is performed in operation planning unit 65 based on the predicted values of consumed power amount and generated power amount of residence (building) H and the chargeable power amount and dischargeable power amount of power storage device 2. An operation plan including operation and discharge operation plans is created (step S300).
In addition, although a thing which determines the time which performs hot water storage driving | operation of the hot-water supply apparatus 31 is contained as an operation plan, since it is not the summary of this indication, description is abbreviate | omitted.

(Operation plan)
The operation plan unit 65 includes a discharge operation plan unit 65a that creates a discharge operation plan as shown in FIG. 2 and a charge operation plan unit 65b that creates a charge operation plan.
(Discharge operation plan)
First, creation of a discharge operation plan by the discharge operation plan unit 65a will be described.
This discharge operation plan is a discharge operation time zone which is a time zone for performing discharge based on the predicted value of the power consumption of the next day in the house H for which the operation plan is to be created and the output efficiency of the model of the power conditioner PC. Set

The flow of processing for creating this discharge operation plan will be described based on the flowchart of FIG.
First, in step S301, the model of the power conditioner PC (in this example, the second power conditioner PC2) installed in the house H for which the operation plan is to be created is read from the residence information database 51. In the next step S302, the output efficiency characteristic of the power conditioner PC is read based on the obtained model information. The output efficiency characteristic is stored in advance in the residence information database 51 together with the model information in the first embodiment, but may be stored in another storage unit in the management server 5.

  In the subsequent step S303, the predicted value of the power consumption on the next day is read from the power consumption prediction unit 61. The predicted value of the power consumption is a value for each predetermined time zone, and in the present embodiment, as shown in FIG. 6, it is a predicted value for each hour zone. The time width of the time zone is not limited to one hour, and may be arbitrarily set to one minute, 10 minutes, 15 minutes, 30 minutes, 2 hours, etc.

  In the next step S304, the priority order of performing the discharge operation for each time zone is set. When priority is given to the power consumption by the discharge of the storage device 2, the power conditioner PC is set higher as the time zone of the predicted value of the power consumption that can be operated with high efficiency. And in this Embodiment 1, in the setting of this priority, it sets to three steps of a 1st priority time zone, a 2nd priority time zone, and a 3rd priority time zone.

FIG. 6 shows an example of the relationship between the amount of power consumption and the priority of discharge operation.
In this example, the efficiency characteristic of the power conditioner PC (the second power conditioner PC2) is the maximum output 2kVA, and the efficiency is the best during discharge at 2kVA, and the output is lower than 2kVA , The efficiency is reduced.

In this case, the first priority time zone is a time zone in which the power conditioner PC can operate at the highest efficiency, and is a time zone where the power consumption exceeds 1600 W.
The second priority time zone is a time zone in which the power conditioner PC can be operated at high efficiency next to the first priority time zone, and is a time zone in which the power consumption is in the range of 600 W to 1600 W.
The third priority time zone is a time zone in which the power conditioner PC can be operated at high efficiency next to the second priority time zone, and is a time zone where the power consumption is 300 W to 600 W.

  So, in the example shown in FIG. 6, the predicted value of the power consumption per hour is set to 7 o'clock in the morning and 17 o'clock to 19 o'clock in the evening as the first priority time zone, which exceeds 1600 W. In addition, the predicted value of the power consumption per hour is set to be the second priority time zone in the morning at 6 o'clock in the morning, at 12 o'clock in the day, and at 20 o'clock to 22 o'clock in the night. Furthermore, the predicted value of the power consumption per hour is less than 600 W in the morning at 8 o'clock, 10 o'clock to 11 o'clock, 13 o'clock to 14 o'clock, 16 o'clock, 23 o'clock to 24 o'clock Is set to the third priority time zone.

  In step S305, which proceeds after setting the priority for each time zone as described above, the operation plan of the discharge operation is created based on the priority. In this case, a discharge operation time zone, which is a time zone in which the discharge operation is performed in order from the time zone having the highest priority, is set. Further, in the time zone in which the priority is common, the later time zone is set as the discharge operation time zone. And, in the setting of the discharge operation time zone, the integrated value of the power consumption in the time zone set as the discharge operation time zone is the lower limit remaining capacity of the storage capacity of the storage device 2 (lower limit value = remaining charge in the first embodiment) Do it until the quantity is 0).

  For example, in the example illustrated in FIG. 6, even if the power consumption in the first priority time zone and the power consumption in the second priority time zone are integrated, the remaining charge amount of the power storage device 2 is the lower limit remaining capacity (= 0). The case where the remaining amount of charge becomes lower limit remaining capacity (= 0) in the third priority time zone will be described as an example. In this case, in the third priority time zone, the discharge operation time zone is set from the late side of 24 o'clock, 23 o'clock and so on. Then, for example, when the remaining power storage amount reaches the lower limit remaining capacity (= 0) by integrating the power consumption in the 13:00 range, the discharge amount in the 8:00, 10:00, 11:00, 13:00 range Is set to 0.

  It should be noted that the reason for setting the dischargeable electric energy to be the set dischargeable electric energy (= 0) as the time zone as late as possible is that the electric power storage device 2 can be charged as much as possible since the external grid E fails. It is to secure until late time. Therefore, in preparing the operation plan, the lower limit remaining capacity may not be set to 0 as described above, and a predetermined storage amount may be secured as electric power at the time of a power failure.

(Charging operation plan)
Next, creation of a charge operation plan in the charge operation plan unit 65b will be described.
The preparation of the charging operation plan is planned based on the predicted value of the power consumption of the house H to be planned, the predicted value of the generated power and the output efficiency characteristic of the model of the power conditioner PC.

The flow of processing for creating this charging operation plan will be described based on the flowchart of FIG.
First, in step S311, the model of the power conditioner PC installed in the house H for which a plan is to be created is read from the residence information database 51. In the next step S312, the output efficiency characteristic of the power conditioner PC (in this example, the second power conditioner PC2) is read from the residence information database 51 based on the model of the power conditioner PC. The second power conditioner PC2 is assumed to be most efficient when operating at 2 kVA, as in the case of discharge.

  In the following step S313, the predicted value of the power consumption for each time zone of the next day is read from the power consumption prediction unit 61, and the predicted value of the generated power for each time zone of the next day is generated from the generated energy prediction unit 62. Read Furthermore, in the next step S314, the surplus power computing unit 63 subtracts the predicted value of the power consumption from the predicted value of the generated power to compute the predicted value of the surplus power for each time zone.

  In the next step S315, the priority order of the charging operation is set for each time zone based on the surplus power amount. In this priority order, a time zone in which the power conditioner PC can be operated at high efficiency is set to two stages of a first priority time zone and a second priority time zone.

In this case, the first priority time zone is a time zone in which the power conditioner PC (the second power conditioner PC2) can operate at the highest efficiency, and in a time zone where the surplus power amount (charging power amount) exceeds 2000 W. Set
Further, the second priority time zone is set to a time zone in which the surplus power amount (charging power amount) is in the range of 1000 W to 2000 W.
So, in the example shown in FIG. 7, 10 o'clock to 14 o'clock is set to the 1st priority time zone. In addition, 9 o'clock in the morning and 15 o'clock in the daytime are set as the second priority time zone.

  In step S316, which proceeds after setting the priority for each time zone as described above, a charge operation operation plan is created based on the priority. That is, it sets as a charge operation time zone which is a time zone which performs charge operation in order from a time zone with high priority. Furthermore, in the time zone in which the priority is common, the charging operation time zone is set from the earlier time zone. Then, the setting of the charging operation time zone is performed until the surplus power amount (= charging amount) of the time zone set as the charging operation time zone becomes the full charge capacity of the power storage device 2.

  For example, in the example shown in FIG. 7, in the first priority time zone, the charging operation time is sequentially set from the time zone of 10 o'clock of the earliest time to the late time zone (14 o'clock). Then, when the accumulated surplus power amount (= charge amount) in the first priority time zone does not reach the capacity for making the power storage device 2 fully charged, priority is given to the 9:00 system which is the early time zone of the second priority time zone. And set it as the operation time. And when fully charged by this 9 o'clock operation, it is set as the time slot | zone which does not perform charge operation in 15 o'clock.

  The charge operation plan and the discharge operation plan created in the operation plan unit 65 described above are sent to the controller CL of the house H via the communication network N, and based on the control of the controller CL, the power conditioner PC and the load Group 3 operation is controlled.

(Operation of Embodiment 1)
Next, the operation of the first embodiment will be described.
The management server 5 stores the model of the power conditioner PC of one house of one house H and the output efficiency information thereof in association with each house H.
Further, the amount of power consumption and the amount of power generation after the construction of the house H are measured by the measuring device 4, and the measured values are sent to the management server 5 and stored in the power history database 52.
Further, the operation patterns of the hot water supply device 31 and the air conditioner 32 in each house H are stored in the operation pattern database 55 in association with the weather information.
Also, data of daily temperature and solar radiation amount are stored in the weather database 54.

  On the other hand, in the control unit 6 of the management server 5, the power consumption prediction unit 61 and the power generation prediction unit 62 calculate the power consumption and the power generation of the next day on the previous day. This prediction is performed based on past power history data and the weather forecast of the next day.

  That is, the power consumption prediction unit 61 calculates the predicted value of the power consumption related to the weather based on the past air temperature, the air conditioning operation pattern and the hot water supply operation pattern, and the weather forecast (air temperature) of the next day (S102) ). Further, the other power consumption not related to the weather is predicted (S103), and this is added to the power consumption related to the weather to be a predicted value of the power consumption (S104).

  Further, the power generation amount prediction unit 62 obtains a predicted value of the power generation amount based on the solar radiation amount based on the weather forecast data of the next day and the history data of the power generation amount associated with the past calendar and the solar radiation amount (S105) ).

  The discharge operation plan unit 65a of the operation plan unit 65 reads the output efficiency characteristics according to the model from the model of the power conditioner PC installed in the house H for which the operation plan is to be created. And based on the predicted value of the power consumption for every hour of the next day, and the output efficiency of power conditioner PC (2nd power conditioner PC2), the priority of discharge operation of each time slot | zone is set.

  That is, when the predicted value of the power consumption per hour on the next day is the value shown in FIG. 6, the time zone (7 o'clock, 17 o'clock to 19 o'clock) where the power consumption exceeds 1600 W is the first Set as a priority time zone. Further, a time zone in the range of 600 W to 1600 W (6 o'clock, 12 o'clock, 20 o'clock to 22 o'clock) of power consumption is set as the second priority time zone. In addition, the time range of power consumption 300W ~ 600W (8 o'clock, 10 o'clock, 11 o'clock, 11 o'clock, 13 o'clock, 14 o'clock, 14 o'clock, 16 o'clock, 23 o'clock, 24 o'clock) is the third Set as a priority time zone.

  And in the operation plan part 65, it sets as a discharge operation time zone in an order from the one with a high priority, and, in the same priority, sets it as a discharge operation time zone in an order from a late time zone. Further, this discharge operation time zone integrates the power consumption of the time zone set as the discharge operation time zone, and sets the time zone until just before the integrated value exceeds the storage capacity of power storage device 2 as the discharge operation time zone. And complete the setting of the driving time zone thereafter.

  In the first embodiment, all of the first to second priority time zones are set as discharge operation time zones. And in the 3rd priority time zone, it sets up as a driving time zone sequentially from 24:00 which is the latest time zone. When the integrated value of the power consumption exceeds the storage amount of power storage device 2 while setting the third priority time zone as the discharge operation time, the discharge operation up to the time zone before the remaining amount of storage battery becomes 0 The time zone is set as a time zone, and the third priority time zone before this is a time zone in which the discharge is not performed. For example, when integration of power consumption in the 10 o'clock range, when the remaining charge amount becomes 0, the range from 24 o'clock to 11 o'clock in the third priority time zone is taken as the discharge operation time zone, and the time zone earlier than that The 10 o'clock and 8 o'clock stages are set as time periods in which discharge is not performed.

  Furthermore, in the charge operation plan unit 65b of the operation plan unit 65, the output efficiency according to the type of the power conditioner PC installed in the house H for which the operation plan is to be created, the hourly power consumption and the power generation The priority order of the charge operation is set based on the predicted value of the power amount.

That is, when the predicted values of the consumed power amount and the generated power amount every hour on the next day and the surplus power amount which is the difference between the both change as shown in FIG. 7, charging is performed based on the surplus power amount. Set the priority.
Specifically, a time zone (10 o'clock to 14 o'clock) where the surplus power amount exceeds 2000 W is set as the first priority time zone. Further, a time zone (9 o'clock, 15 o'clock or so) in which the surplus power amount is in the range of 1000 W to 2000 W is set as the second priority time zone.

  Then, in the operation planning unit 65, the discharge operation time zone is set in order from the higher priority order, and in the same priority order, in order from the earlier time zone. In addition, this discharge operation time zone integrates the power consumption of the time zone set as the discharge operation time zone, and the time zone up to the point when the integrated value exceeds the storage capacity of power storage device 2 is taken as the discharge operation time zone. Set and complete the setting of the driving time zone thereafter.

  The operation plan unit 65 outputs the discharge operation time zone and the charge operation time zone created as described above to the controller of the house H, and the controller charges / discharges the storage device 2 based on the operation plan sent. I do.

In this case, since the power conditioner PC performs the charge operation and the discharge operation under the most efficient charge / discharge conditions, it is possible to perform the efficient operation.
Moreover, by predicting charging power based on daily power consumption, generated power and weather conditions and automatically controlling charge / discharge, the above-mentioned efficient and economical merit can be realized while eliminating the need for user's operation. It can be enjoyed.

Furthermore, since it is the time as late as possible that the storage residual amount becomes 0 by discharging the storage device 2, it is possible to receive the above merit while securing the amount of power at the time of a power failure.
Similarly, when charging the power storage device 2, the charging operation time is set so that the timing at which the power storage device 2 is fully charged can be as fast as possible. For this reason, when the amount of power generation is unexpectedly reduced due to sudden cloudiness or rain, it is possible to prevent the influence as much as possible.

(Effect of Embodiment 1)
The effects of the first embodiment of the present disclosure will be listed below.
1) The power control system of the first embodiment
A solar cell panel 1 and a power storage device 2 installed in a house H;
Load group 3 consuming power in house H,
A second power conditioner PC2 that charges the storage device 2 with power generated by the solar cell panel 1 and discharges the storage device 2 to the load group 3;
A measuring device 4 for measuring the power consumption of the load group 3 and the power generation amount of the solar cell panel 1;
A control unit 6 as a control device for controlling the operation of the second power conditioner PC2 and a controller CL;
Each database 51-55 as a memory | storage part which memorize | stores the measured value of the measuring device 4, and memorize | stores the output efficiency information according to the model of 2nd power conditioner PC2,
Based on the past measured values stored in each of the databases 51 to 55, the power consumption for each predetermined time slot of the load group 3 of the next day and the generated power for each predetermined time slot of the solar cell panel 1 A power consumption prediction unit 61 and a power generation prediction unit 62 that predict the amount of electricity;
Equipped with
Control unit 6 includes operation planning unit 65 that plans a time zone in which power storage device 2 performs charge and discharge based on predicted values of power consumption and generated power and the output efficiency of second power conditioner PC2.
Therefore, even if the type of the second power conditioner PC2 installed differs depending on the house H or the power consumption differs, it is possible to operate the power conditioner PC in a time zone in which charging / discharging operation can be performed efficiently. It becomes possible.
For this reason, it is not necessary to increase the capacity of the power generation device unnecessarily.

2) The power control system of the first embodiment
The power consumption prediction unit 61 predicts the power consumption for each time slot of a predetermined width on the next day,
The discharge operation plan unit 65a sets the priority of the time zone in which the discharge operation is performed to the higher the time zone of the value at which the predicted value of the power consumption can operate the second power conditioner PC2 efficiently,
The discharge operation time zone is set from the time zone with the highest priority.
Therefore, while the second power conditioner PC2 is caused to perform the discharge operation around the time zone in which the discharge operation can be performed efficiently, it is possible to suppress the discharge operation during the time when the efficiency is not good.

3) The charge and discharge control device of the first embodiment
Discharge operation planning unit 65a is based on the time period until the total value of the power consumption of the time period set as the discharge operation time period becomes the dischargeable lower limit value which is preset for the state of charge of power storage device 2. Set the discharge operation time zone.
Therefore, the whole of the dischargeable storage capacity of the storage device 2 can be efficiently discharged.

4) The power control system of the first embodiment
The discharge operation plan unit 65a gives priority to the later time zone and sets it as the discharge operation time zone in the time zone having the same priority for performing the discharge operation.
Therefore, it is possible to efficiently discharge the whole of the dischargeable storage capacity of the storage device 2 while securing the storage amount of the storage device 2 capable of discharging at the time of a power failure or the like.

5) The power control system of the first embodiment
The charge operation plan unit 65b plans a charging time zone in which the power storage device 2 is charged based on the predicted value of the generated power and the charge and discharge efficiency of the second power conditioner PC2.
Therefore, while the second power conditioner PC2 is charged and operated around a time zone in which the charging operation can be performed efficiently, it is possible to suppress the charging operation of the time when the efficiency is not good.

6) The power control system of the first embodiment
The power consumption prediction unit 61 and the power generation prediction unit 62 predict the power consumption and the power generation for each predetermined time slot of the next day,
The surplus power amount calculation unit 63 obtains the surplus power amount by subtracting the consumed power amount from the generated power amount for each predetermined time zone,
Furthermore, the charging operation plan unit 65b sets the priority of the charging operation time zone higher as the value of the surplus power amount can operate the second power conditioner PC2 efficiently, and charges from the time zone with the higher priority. Set as an operating time zone.
Therefore, the second power conditioner PC2 can be charged efficiently.

7) The power control system of the first embodiment
Charge operation planning unit 65b sets a time zone as a charge operation time zone until the total value of the surplus power amount in the time zone set as the charge operation time zone becomes the storage capacity of power storage device 2.
Therefore, the power generated by the solar cell panel 1 can be charged until the power storage device 2 is fully charged, and can be consumed in the house H.

8) The power control system of the first embodiment
The charging operation plan unit 65b prioritizes the earlier time zone and sets it as the charging operation time zone in the time zone having the same priority for performing charging.
Therefore, the power storage device 2 is fully charged as soon as possible, and a defect in power generation of the solar cell panel 1 due to a sudden change in the weather or the like occurs, making it unlikely that the power storage device 2 can not be fully charged.

9) The power control system of the first embodiment
The controller includes a controller CL provided in the house H to control the operation of the second power conditioner PC 2 and a management server 5 capable of communicating with the controllers CL installed in a plurality of houses H.
Each of the databases 51 to 55 installed in the management server 5 stores models of the second power conditioner PC 2 installed in a plurality of houses H and charge / discharge efficiency information for each model,
The operation planning unit 65 creates an operation plan for each house H, and outputs the operation plan to the controller CL installed in each house H.
Therefore, the operation plan of charging / discharging of the 2nd power conditioner PC2 installed in a plurality of houses H can be created for every house H by operation plan part 65 of management server 5. And even if the operation plan changes the model of 2nd power conditioner PC2 of each house H, 2nd power conditioner PC2 can be operated efficiently as what was according to the model.

  The embodiment of the charge and discharge control device of the present disclosure has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and a design that does not deviate from the scope of the present invention Modifications are included in the present invention.

For example, in the embodiment, a house is taken as an example of a building to which the charge and discharge control device of the present disclosure is applied, but the invention can also be applied to a building other than a house.
Also, in the embodiment, the solar cell panel that generates electric power by sunlight is illustrated as the electric power generation device, but the electric power generation device is not limited to this, and is also applied to those that generate electric power from other than sunlight can do.

In the embodiment, a power control system including a management server is shown as the charge / discharge control device. However, the present invention is not limited to this, and may be applied to a device that controls charge / discharge in a building. In this case, the model of the power conditioner and the output efficiency information according to this model may be input at the time of initial setting. In this case, weather information can be input via a communication network such as the Internet.
Furthermore, in the embodiment, although what showed preparation of the driving | operation plan of charge and the driving | operation plan of discharge was shown, it is good also as what makes the driving | operation plan of only any one of charge and discharge.
Moreover, as the output efficiency, in the present embodiment, the same conditions are shown for charge and discharge, but the present invention is not limited to this, and the most efficient output conditions are different between charge and discharge. It may be.

  Moreover, although the example which produces the driving | operation plan of the next day as a future driving | operation plan was shown in embodiment, the object day which produces a driving | operation plan is not limited to the next day. For example, it may be a specific day after the next day, or the operation plan may be prepared over a plurality of days, such as one week.

  Further, in the embodiment, in setting the discharge operation time zone, the time zone until immediately before the integrated value of the estimated value of the power consumption of the time zone set as the discharge operation time zone exceeds the storage capacity of the power storage device 2 An example of setting as the discharge operation time zone has been shown. However, if a certain amount of remaining power is secured for a power failure without setting the lower limit remaining power to 0, the discharge operation is performed until the integrated energy consumption exceeds the storage capacity. It may be set as a time zone.

1 Solar cell panel (power generator)
2 Power storage device 3 load group (power load)
4 measuring device 5 management server 6 control unit 31 water heater (electric load)
32 air conditioner (power load)
51 residence information database 52 power history database 53 power price database 54 weather database 55 operation pattern database 61 power consumption prediction unit 63 surplus power calculation unit 65 operation planning unit 65a discharge operation planning unit 65b charge operation planning unit CL controller (control unit )
E Power grid H1, ..., HX Residential PC power conditioner PC1 1st power conditioner PC2 2nd power conditioner

Claims (9)

A power generation device and a storage device installed in a building;
A power load that consumes power in the building;
A power conditioner that charges the power storage device with electric power generated by the power generation device and discharges the power storage device from the power storage device to the power load;
A measuring device for measuring the amount of power consumption of the power load and the amount of power generation of the power generation device;
A control device that controls the operation of the power conditioner;
A storage unit that stores measurement values of the measurement device and stores output efficiency information according to a model of the power conditioner;
Based on the past measured values stored in the storage unit, the amount of power consumption for each predetermined time slot of the power load in the future, and the amount of generated power for each time slot of the predetermined width of the power generation apparatus A prediction unit that predicts
Equipped with
The charge and discharge control device having an operation plan unit that plans a time zone in which the power storage device performs charge and discharge based on the value predicted by the prediction unit and the output efficiency of the power conditioner. In the charge and discharge control device according to claim 1,
The prediction unit predicts the power consumption for each time slot of a predetermined width on the next day,
The operation plan unit sets the priority of the time zone in which the discharge operation is performed to the higher the time zone of the value at which the predicted value of the power consumption can operate the power conditioner efficiently,
The charge / discharge control apparatus which sets as a discharge operation time zone from the time slot | zone with a high said priority. In the charge and discharge control device according to claim 2,
The operation plan unit is configured such that the total value of the power consumption of the time zone set as the discharge operation time zone reaches a time zone in which the remaining amount of charge of the power storage device reaches a preset dischargeable lower limit value. The charge / discharge control apparatus which sets the said discharge operating time zone based on. In the charge / discharge control device according to claim 2 or 3,
The charge and discharge control device, wherein the operation plan unit prioritizes a late time zone as the discharge operation time zone in a time zone having the same priority for performing the discharge operation. The charge / discharge control device according to any one of claims 1 to 4.
The charge and discharge control device, wherein the operation plan unit plans a charging time zone in which the power storage device is charged based on the predicted value of the generated power amount and the charge and discharge efficiency of the power conditioner. In the charge and discharge control device according to claim 5,
The prediction unit predicts the power generation amount and the power consumption amount for each predetermined time zone of the next day,
The operation plan unit determines a surplus power amount obtained by subtracting the consumed power amount from the generated power amount for each of the predetermined time zones.
Furthermore, the priority of the charging operation time zone is set to a higher value as the value of the surplus power amount can operate the power conditioner efficiently.
The charge / discharge control device which is set as a charge operation time zone from a time zone where the priority is high. In the charge and discharge control device according to claim 6,
The operation plan unit sets the charge operation time zone based on the time zone until the total value of the surplus power amount in the time zone set as the charge operation time zone becomes the storage capacity of the power storage device Control device. In the charge and discharge control device according to any one of claims 4 to 7,
The charge and discharge control device, wherein the operation plan unit prioritizes an earlier time zone as the charge operation time zone in a time zone having the same priority for performing the charging. The charge / discharge control device according to any one of claims 1 to 8.
The control device includes a controller provided in the building to control the operation of the power conditioner, and a management server capable of communicating with the controllers installed in a plurality of the buildings.
The storage unit is installed in the management server, and stores models of power conditioners installed in the plurality of buildings and charge / discharge efficiency information for each model.
The said electric operation plan part produces the said operation plan for every said building, The charge / discharge control apparatus which outputs this operation plan to the said controller installed in each building.