JP6769889B2 - Power control system and power control method - Google Patents

Description

The present invention relates to a power control system and a power control method.

Conventionally, in a house equipped with a power storage device, a power control system is known in which power purchase, sale, charge, discharge, etc. of the house are controlled by a management server via a communication network (see, for example, Patent Document 1). ).
In this conventional power control system, the voltage, temperature, capacity, etc. of the power storage device are detected, the presence or absence of an abnormality in the power storage device is determined based on these detected values, and the power storage device is maintained.

WO2015 / 129321

However, in the above-mentioned prior art, the presence or absence of an abnormality in the power storage device is determined based only on information on the power storage device such as voltage, temperature, and capacity. Therefore, when the correct information about the power storage device is not sent due to the communication failure of the sensors that detect the information about the power storage device, there is a possibility that the power storage device is determined to be abnormal even though it is operating normally. ..

Therefore, an object of the present disclosure is to provide a power control system and a power control method capable of more accurately determining an abnormality of a power storage device.

In order to achieve the above object, the power control system of the present disclosure is
The power load that is installed in the building and consumes power to operate,
A power storage device installed in the building that can be charged and discharged,
It is interposed between the grid power network outside the building, the power load in the building, and the power storage device, and is used to buy and sell power for the system power network, supply power to the power load, and charge the power storage device. A distribution board that relays discharge power,
A power measuring device provided in the building and capable of measuring the amount of power purchased and sold with the grid power grid, the amount of charge and discharge with the power storage device, and the amount of power supplied with respect to the power load. ,
The electricity storage is connected to the building via a communication network and is based on the power purchase amount, the power sale amount, the charge amount, the discharge amount, and the supply power amount in the set period measured by the power measuring device. An abnormality judgment device that determines the abnormality of the device and
The power control system is characterized by being equipped with.

When either the charge amount or the discharge amount is measured during the set period, the abnormality determination device determines that there is no abnormality in the power storage device, and determines that the charge amount and the discharge amount are the same. If none of the above is detected, and if the power supply amount exceeds the total power consumption amount of the building obtained by subtracting the power sale power amount from the power purchase power amount, the power storage device itself is abnormal. It is preferable to determine that there is an abnormality in the communication system with the power storage device, and if the amount of power supplied does not exceed the total amount of power consumption, it is determined that the power storage device itself has an abnormality.
Further, when the abnormality determination device determines that there is no abnormality in the power storage device itself and there is an abnormality in the communication system, the measured values of the charge amount and the discharge amount are measured while maintaining the operation of the power storage device. It is preferable to stop the input to the abnormality determination device , while stopping the operation of the power storage device when the power storage device itself is determined to be abnormal.
A power generation device is provided in the building, and the power measurement device can also measure the amount of power generated by the power generation device. The abnormality determination device uses the total power consumption as the power purchase amount. It is preferable to obtain by subtracting the amount of power sold from the value obtained by adding the amount of power generation to.

Further, in order to achieve the above object, the power control method of the present disclosure is described.
The power load that is installed in the building and consumes power to operate,
A power storage device installed in the building that can be charged and discharged,
It is interposed between the grid power network outside the building, the power load in the building, and the power storage device, and buys and sells power to the system power network, supplies power to the power load, and charges the power storage device. A distribution board that relays discharge and
A power measuring device provided in the building and capable of measuring the amount of power purchased and sold with the grid power grid, the amount of charge and discharge with the power storage device, and the amount of power supplied with respect to the power load. ,
The electricity storage is connected to the building via a communication network and is based on the power purchase amount, the power sale amount, the charge amount, the discharge amount, and the supply power amount in the set period measured by the power measuring device. An abnormality judgment device that determines the abnormality of the device and
It is a power control method in a power control system equipped with
A step of determining that the power storage device has no abnormality if either the charge amount or the discharge amount is measured during the set period based on the measurement of the power measurement device.
When it is not determined that there is no abnormality in the power storage device, the total power consumption of the building is obtained by subtracting the power sold from the power purchased during the set period, and the power supplied exceeds the total power consumption. If so, it is determined that there is no abnormality in the power storage device itself and there is an abnormality in the communication system with the power storage device, and if the power supply amount does not exceed the total power consumption amount, the power storage device itself has an abnormality. Steps to determine that there is
The power control method is characterized by the above.

Since the power control system of the present disclosure determines an abnormality of the power storage device based on the amount of power purchased, the amount of power sold, the amount of charge, the amount of discharge, and the amount of power supplied, information on the power storage device such as the amount of charge and the amount of discharge is transmitted. Even if this is not the case, it is possible to determine whether or not there is an abnormality in the power storage device. Therefore, it is possible to provide a power control system capable of more accurately determining an abnormality of the power storage device.

If neither the charge amount nor the discharge amount is measured during the set period, the power storage device itself may be abnormal or the power storage device is normal, depending on whether the power supply amount exceeds the total power consumption amount. If it is determined whether or not there is an abnormality in the communication system, the state of the power storage device can be determined in more detail.

Further, when the abnormality determination device determines that the power storage device operates normally and there is an abnormality in the communication system, the measurement of the charge amount and the discharge amount is stopped while maintaining the operation of the power storage device, while the power storage device itself. If it is determined that the power storage device is abnormal, the device that stops the operation of the power storage device can avoid the problem of stopping the power storage device even though the power storage device itself has no abnormality.
Then, it is possible to measure the amount of power generated by the power generation device installed in the building, and the abnormality determination device does not calculate the total power consumption by subtracting the amount of power sold from the value obtained by adding the amount of power generated to the amount of purchased power. , Even in a building equipped with a photovoltaic power generation device, it is possible to determine an abnormality in the power storage device.

Further, even in the power control method of the present invention, since the abnormality of the power storage device is determined based on the amount of power purchased, the amount of power sold, the amount of charge, the amount of discharge, and the amount of power supplied, storage of voltage, temperature, capacity, etc. Even if the information about the device is not sent, it is possible to determine whether or not there is an abnormality in the power storage device. Therefore, it is possible to provide a power control method capable of more accurately determining an abnormality of the power storage device.

It is an whole system diagram which shows typically the whole structure of the power control system of Embodiment 1 of this invention. It is a block diagram which shows typically the electric power system and the communication system of the house to which the electric power control system of Embodiment 1 is applied. It is a block diagram which shows the structure of the management server in the power control system of Embodiment 1. FIG. It is a flowchart which shows the flow of the process of abnormality determination in the operation monitoring part of the management server. It is a time chart which shows an example of the change of the power consumption amount, the power purchase amount, the power sale amount, the power generation amount, and the discharge amount in a house.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
The overall configuration of the power control system of the first embodiment will be described with reference to FIG. This power control system is a controlled building of houses H1, H2, H3, ..., HX is a commercial power source 20 as a grid power network such as a power plant of a power company or cogeneration equipment installed in each area. (See FIG. 2). In the following description, when a specific one of the houses H1, ..., HX is not referred to, it is simply referred to as the house H.

Each house H includes a solar cell panel 1 as a power generation device and a power storage device 2 for temporarily storing electric power. Further, each of these houses H is connected to the management server 5 via an external communication network N such as the Internet, and sends / receives data such as measured values and calculation processing results to / from the management server 5 and various control signals. Is sent and received.

Although not shown, the management server 5 is composed of a CPU and an information processing device including memories such as RAM and ROM, and is a communication interface 51 (FIG. 3) that communicates via a communication network N controlled by the CPU. See) and so on.
The solar cell panel 1 is a device that converts sunlight into electric power by using a solar cell to generate electric power. The solar cell panel 1 can supply electric power only during a time period in which sunlight can be received. Further, the DC power generated by the solar cell panel 1 is usually converted into AC power by a power conditioner (not shown) and used. The specifications such as the capacity of the power generation amount of the solar cell panel 1 installed in the house H are stored in the house information database 53a (see FIG. 3) described later on the management server 5 side.

On the other hand, the power storage device 2 is also connected to a power conditioner (not shown) to control power storage (charging) and discharge, like the solar cell panel 1. In this storage / discharge control, for example, the power storage device 2 stores external power having a low power price such as midnight power supplied from an external system power grid, or power generated by the solar panel 1. Specifications such as the capacity and rated output of the stored power of the power storage device 2 are also stored in the house information database 53a (see FIG. 3) described later on the management server 5 side.

A distribution board 10 shown in FIG. 2 is provided as a power supply system for each house H.
The distribution board 10 is connected to an external commercial power source 20, and is also connected to the solar cell panel 1, the power storage device 2, and the load group 3 of the house H.

The load group 3 is composed of a plurality of electric power loads that are driven by consuming electric power, and examples of the electric power load include a hot water supply device 31, an air conditioner 32, a lighting device such as a lighting stand and a ceiling light (not shown). Includes home appliances such as refrigerators and televisions (not shown). The distribution board 10 and each power load of the load group 3 are connected to each other via a plurality of branch circuits 20a, 20b to 20n.

Further, using the power passing through the distribution board 10 as a sensor, a CT sensor 11 for purchasing power, a CT sensor 12 for selling power, a CT sensor 13 for power generation, a CT sensor 14 for discharging, a CT sensor 15 for charging, and a CT for each branch circuit are used. Sensors 16a to 16n are provided.

The power purchase CT sensor 11 measures the power supplied from the commercial power source 20 to the distribution board 10, that is, the purchased power used by purchasing power in the house H.
The power selling CT sensor 12 measures the power supplied from the distribution board 10 to the commercial power source 20, that is, the power sold from the house H to the commercial power source 20.
The power generation CT sensor 13 measures the electric power generated by the solar cell panel 1.
The discharge CT sensor 14 measures the electric power discharged from the power storage device 2.
The charging CT sensor 15 measures the electric power charged in the power storage device 2.
The branch circuit-specific CT sensors 16a to 16n measure the power supplied to the power load of the load group 3 via the branch circuits 20a to 20n.

The measurement data of each of these CT sensors 11 to 15 and 16a to 16n is collected in the measuring device 17 and measured as an electric energy per unit time. This unit time can be integrated at any time such as 1 second unit, 1 minute unit, 1 hour unit, and the like.

Then, the measurement data collected in the measuring device 17 and the electric energy integrated as the electric energy per unit time are input to the in-house control unit 18 and used for various processes, and are communicated from the in-house control unit 18. It is transmitted to the management server 5 via the interface 19. A display device 18a such as a liquid crystal display is connected to the control unit 18 in the house, and the power input / output status and the consumption status in the house H are displayed.

Next, the configuration of the management server 5 will be described with reference to FIG.
The management server 5 includes a communication interface 51, a control unit 52 that performs various controls, a residence information database (DB) 53a, a power consumption history database 53b, a power price database 53c, a meteorological database 53d, and an operation pattern database 53e. And.

The communication interface 51 sends specifications, measured values, processing requests, and the like of various facilities transmitted from each house H via the communication network N to the control unit 52 of the management server 5. Further, the communication interface 51 has a function of sending data stored in various databases 53a to 53e, calculation processing results performed by the control unit 52, an update program, and the like to each house H.

In the house information database 53a, the house code (identification number) of each house H, the address associated with the house code, the year of construction, the heat insulation performance, the floor plan, the electrical wiring, the materials used, and the specifications of the solar cell panel 1 (power generation capacity). ), Information such as specifications (storage capacity, rated output) of the power storage device 2 is stored. Further, in the house information database 53a, the actual power generation amount for each unit time is stored in association with the meteorological data (solar radiation amount) for each house H. For example, since the installation conditions of the solar cell panel 1 are different for each house H, even if the amount of solar radiation is the same in the same area, the amount of power generation is different, so that data is stored for each house H.

In the power consumption history database 53b, the measurement data of the power consumption measured in each house H is received and stored via the communication interface 51. The history of this power consumption is stored for each unit time, and is also stored in association with the calendar such as the day of the week. In the power consumption history database 53b, the power consumption of the air conditioner load such as the air conditioner 32 and the hot water supply load of the hot water supply device 31 which are easily affected by the weather conditions such as the temperature, and the weather conditions such as the temperature are not easily affected. The power consumption of other loads may be categorized by load and stored.

The electric power price database 53c stores information on the electric power price (the electric power purchase price as seen from the resident side) that changes depending on the time of the external electric power set by the electric power company or the like.

In the electric power price database 53c, the time when the electric power price is switched and the electric power price in each time zone (the electric power purchase price when viewed from the accepting side) are stored. Further, the electric power price database 53c also stores the price at which the electric power company or the like purchases the electric power generated by the solar cell panel 1 (the selling price when viewed from the resident side).

The meteorological database 53d stores the next day's weather forecast data such as the temperature and the amount of solar radiation in each part of the country where each house H is located, which is received from a server (not shown) such as the Japan Meteorological Agency or a weather forecast company via the communication network N. There is. Further, the meteorological database 53d may store actual meteorological data, temperature, humidity, sunshine amount, and other meteorological data from moment to moment, and may use this as past data.

In the operation pattern database 53e, various operation patterns of the load group 3 and the power storage device 2 installed in each house H are stored in association with the weather data.

The control unit 52 includes an operation planning unit 52a and an operation monitoring unit 52b.
The operation planning unit 52a predicts the required power consumption amount, power generation amount, and operation pattern for each hour of the next day based on the weather forecast of the next day and the past power consumption data, and the power storage operation time and discharge operation of the power storage device 2 The time, the hot water storage operation time by the hot water supply device 31, and the like are set.

The operation monitoring unit 52b monitors the operating state of using electric power in the house H based on the data sent from the house H, and when an abnormality including an abnormality of the power storage device 2 occurs, the operation monitoring unit 52b reports the abnormality. Executes the processing according to. As the process of notifying this abnormality, a process of displaying on the display device 18a, a process of notifying the management company of the house H by telephone, e-mail, etc. via the communication network N is performed.

The operation monitoring by the operation monitoring unit 52b includes a process of determining an abnormality of the power storage device 2. As the abnormality determination of the power storage device 2, a determination is made based on each electric energy detected by each of the CT sensors 11 to 15 and 16a to 16n described later. In parallel with this determination, a determination may be made based on information such as the temperature, capacity, and voltage value of the well-known power storage device 2 as in the prior art.

In the present embodiment, as an abnormality determination of the power storage device 2, measurement data of the discharge CT sensor 14 and the charging CT sensor 15 related to the power storage device 2 are sent due to an abnormality occurring in the power storage device 2 itself and a poor connection or the like. It is determined that the abnormality is due to the failure.

Hereinafter, the flow of the abnormality determination process of the power storage device 2 based on the measurement data of the CT sensors 11 to 15 and 16a to 16n will be described with reference to the flowchart of FIG.
In step S101, the total value of the discharge amount and the total value of the charge amount in the power storage device 2 for the past plurality of days (in the present embodiment, this is 7 days) retroactively set for a plurality of days are calculated. , Step S102.

In the next step S102, it is determined whether the total value of the discharge amount is larger than 0 or the total value of the charge amount is larger than 0, and if any of them is larger than 0 (YES), step S107 After determining that there is no abnormality, the first second monitoring process is terminated. That is, in step S102, it is determined whether or not charging / discharging is performed in the power storage device 2 during the set period, and if any of charging / discharging is performed, it is determined that there is no abnormality.

On the other hand, when both the total value of the discharge amount and the total value of the charge amount are 0 in step S102, it is assumed that some abnormality has occurred, and the process proceeds to step S103 to determine the type of the above abnormality. That is, in step S102, if neither charging nor discharging is performed, it is determined that either an abnormality has occurred in the power storage device 2 or a problem has occurred in the measured values of the charging amount and the discharging amount.

In step S103, the total power consumption for the past plurality of days and the amount of power supplied from the distribution board 10 to the load group 3 are calculated for each predetermined time zone. Here, the past plurality of days are the above 7 days in the present embodiment. Further, the predetermined time zone is every 30 minutes in the present embodiment. The plurality of days is not limited to 7 days, and the time zone is not limited to 30 minutes.

Here, the total power consumption is obtained by adding the power purchase amount detected by the power purchase CT sensor 11 and the power generation amount detected by the power generation CT sensor 13, and from the added value, the power sale CT sensor. It is obtained by subtracting the amount of purchased power detected by 12.

On the other hand, as the electric energy supplied to the load group 3, the total electric energy of the branch circuit, which is the total value of the electric energy measured by the branch circuits 20a to 20n, is calculated. The calculation of the total electric energy (supply electric energy) of the branch circuit may be performed in step S101.
Further, the total electric energy of the branch circuit is calculated by subtracting the electric energy sold from the total value of the electric energy purchased from the commercial power source 20, the electric energy generated by the solar cell panel 1, and the discharging electric energy from the power storage device 2. Equivalent to.

In step S104 following step S103, it is determined whether or not there is a time zone in which the total power consumption is lower than the total power consumption of the branch circuit. When the time zone of total power consumption <total power consumption of the branch circuit occurs, the power storage device 2 itself is normal, but the communication system related to the power storage device 2 (discharge CT sensor 14, charging CT sensor 15). It is determined that an abnormality has occurred in (measurement). In this case, the process proceeds to step S106, and communication of the measured values of the power storage device 2 (discharge CT sensor 14, charging CT sensor 15) to the management server 5 is stopped without stopping the operation of the power storage device 2. That is, in the time zone where the total power consumption <the total power of the branch circuit, the difference includes the power discharged from the power storage device 2, and the power storage device 2 itself is operating normally, but the discharge CT sensor. 14. It is determined that there is a problem in the communication system of the measured values of the charging CT sensor 15.

On the other hand, in step S104, if the time zone of total power consumption <total power consumption of the branch circuit does not occur, the process proceeds to step S105, it is determined that an abnormality has occurred in the power storage device 2 itself, and the power storage device 2 Stop the operation.
That is, when the time zone of total power consumption <total power consumption of the branch circuit does not occur, it is determined that the power storage device 2 itself has an abnormality because it indicates that there is no discharge from the power storage device 2.

In step S104 above, is the total power consumption smaller than the predetermined amount of the total power consumption of the branch circuit so as to allow a certain measurement error in the comparison between the total power consumption and the total power consumption of the branch circuit? It may be determined whether or not.

(Action of Embodiment 1)
Next, the operation of the first embodiment will be described.
FIG. 5 is a time chart showing an example of changes in the daily power consumption, purchased power, sold power, and power generation, and this power control is based on the operation plan of the operation planning unit 52a. It was executed.
As shown in FIG. 5, the solar cell panel 1 generates electricity in the daytime, and the amount of electricity generated that exceeds the amount of power consumed by the company is sold. Further, since the electric power price is low at night, the heat storage of the hot water supply device 31 and the charging of the power storage device 2 are controlled to be performed at night.
Based on the comparison between the nighttime power purchase price and the daytime power sale price, if the nighttime power purchase price exceeds the daytime power sale price, the power storage device 2 is charged with a part of the generated power. You may control it.

In performing such power control, in the power control system of the first embodiment, the management server 5 at a remote location monitors the presence or absence of an abnormality in the power storage device 2.
In this monitoring, in the first embodiment, the CT sensors 11, 12, 1316a are not performed based only on the signals from the discharge CT sensor 14 and the charging CT sensor 15 related to the power storage device 2. Based on the signals from ~ 16n, the abnormality determination process of the power storage device 2 with higher accuracy and the process according to the determination result are performed.

In this abnormality determination process, first, during the past plurality of days (7 days), the total value of the discharge amount detected by the discharge CT sensor 14 and the total value of the charge amount detected by the charging CT sensor 15 are from 0. Is also large (S101, S102). That is, it is determined whether or not either discharging or charging is executed in the power storage device 2.

Then, if either the total value of the charge amount or the total value of the discharge amount is larger than 0, that is, if the measured value indicates either charge or discharge of the power storage device 2, the power storage device 2 Is determined to be normal (step S107).

On the other hand, neither the total value of the discharge amount or the total value of the charge amount of the past multiple days (7 days) is larger than 0, that is, the measured values of both sensors 14 and 15 are in the past set period. When it indicates that the power storage device 2 has not been charged or discharged, it is determined that the power storage device 2 has an abnormality. Then, when it is determined that the power storage device 2 has an abnormality, in the first embodiment, it is further determined whether the power storage device 2 is abnormal or the communication system of both sensors 14 and 15 is abnormal. At the same time, the power storage device 2 is controlled accordingly.

Specifically, first, the total power consumption amount and the total power amount of the branch circuit (supply power amount) for each predetermined time zone in the past plurality of days are calculated (step S103).
Here, the total power consumption is obtained by adding the power purchase amount detected by the power purchase CT sensor 11 and the power generation amount detected by the power generation CT sensor 13, and from the added value, the power sale CT sensor 12 It is obtained by subtracting the amount of purchased power detected by. That is, the sum of the amount of power purchased from the external commercial power source 20 and the amount of power generated by the power generation device 1 is the amount of power input to the house H, and the amount of power sold is the amount of power output from the house H. is there. Therefore, the value obtained by subtracting the amount of power sold from the sum of the amount of power purchased and the amount of power generation is the total amount of power consumed in the house H, that is, the total power consumption.

On the other hand, the total electric energy of the branch circuit (supply electric energy) is the electric power supplied from the distribution board 10 to the load group 3, and is the electric power consumed by the load group 3 of the house H. Therefore, the total power of the branch circuit may include the power discharged from the power storage device 2.

Therefore, the total power consumption and the total power consumption of the branch circuit are compared (step S104). That is, if the total power consumption is less than the total power consumption of the branch circuit, the total power consumption of the branch circuit includes the discharge amount from the power storage device 2. In this case, the power storage device 2 normally executes charging / discharging, while the measurement signals of the discharging CT sensor 14 and the charging CT sensor 15 are not transmitted to the measuring device 17 and the in-house control unit 18. , Judge that an abnormality such as a poor connection of the communication system has occurred. Therefore, the communication of the measurement signals (charge amount, discharge amount) of both sensors 14 and 15 is stopped at either of the sensors 14 and 15 and the management server 5, while the operation of the power storage device 2 is maintained. (Step S106). The above-mentioned abnormality of the communication system is an abnormality between the discharging CT sensor 14, the charging CT sensor 15, and the measuring device 17 related to the power storage device 2, and is an abnormality of the other CT sensors 11 to 13, 16a to 16n. It is assumed that the measured values are sent normally.

On the other hand, if the total power consumption is not equal to the total power consumption of the branch circuit, it is determined that the power storage device 2 itself is not executing charging / discharging due to an abnormality, and a command to stop the operation of the power storage device 2 is output (step). S105).

When the abnormality of the power storage device 2 itself or the abnormality of the communication system occurs, it is preferable to further perform a process of notifying the resident of the house H and the maintenance management company of the abnormality and the content of the abnormality. In this case, for example, the display device 18a can display and notify the resident that an abnormality has occurred in the power storage device 2, or can send an e-mail to the resident's e-mail address. Similarly, the maintenance management company can also be notified by sending an e-mail or providing voice guidance by telephone.

(Effect of Embodiment 1)
The effects of the power control system of the first embodiment are listed below.
1) The power control system of the first embodiment is
The load group 3 as a power load that is installed in the house H as a building and operates by consuming electric power,
A power storage device 2 provided in the house H that can be charged and discharged, and
A solar cell panel 1 installed in a house H that converts sunlight into electric power to generate electricity.
The power purchased and sold for the commercial power source 20 and the power generated by the solar cell panel 1 are interposed between the commercial power source 20 as an external system power network of the house H and the load group 3 and the power storage device 2 in the house H. , The distribution board 10 that relays the power supplied to the load group 3 and the charge / discharge power to the power storage device 2.
The amount of power purchased and sold with the commercial power source 20, the amount of charge and discharge with the power storage device 2, the power generated by the solar panel 1, and the power supplied to the load group 3 provided in the house H. Each CT sensor 11, 12, 13, 14, 15, 16a to 16n and the measuring device 17 as a power measuring device capable of measuring the total electric energy of the branch circuit as an amount,
Power purchased, sold, charged, and discharged in the set period measured by each CT sensor 11, 12, 14, 15, 16a to 16n and the measuring device 17 connected to the house H via the communication network N. It is characterized by including an operation monitoring unit 52b of the management server 5 as an abnormality determination device for determining an abnormality of the power storage device 2 based on the amount of power generation and the total electric energy of the branch circuit.
Therefore, since the abnormality determination of the power storage device 2 is performed based on the power purchase amount, the power sale power amount, the charge amount, the discharge amount, and the total power amount of the branch circuit, when information about the power storage device such as the charge amount and the discharge amount is not sent. However, it is possible to determine whether or not there is an abnormality in the power storage device 2 at the management server 5 in a remote location connected to the house H via the communication network N. Therefore, it is possible to provide a power control system capable of more accurately determining an abnormality of the power storage device 2.

2) The power control system of the first embodiment is
The operation monitoring unit 52b determines that there is no abnormality in the power storage device 2 when either the charge amount or the discharge amount is measured during the set period, and if neither the charge amount nor the discharge amount is detected, the operation monitoring unit 52b determines that there is no abnormality. Furthermore, if the total power consumption of the branch circuit exceeds the total power consumption obtained by subtracting the power sales amount from the value obtained by adding the power generation amount to the power purchase power amount, there is no abnormality in the power storage device 2 itself and the power storage device 2 itself. It is characterized in that it is determined that there is an abnormality in the communication system with 2 and if the total electric energy of the branch circuit does not exceed the total electric energy, it is determined that the power storage device 2 itself has an abnormality.
Therefore, it is determined whether the power storage device 2 itself has an abnormality or whether the power storage device 2 itself is normal and there is an abnormality in the communication system that sends the measured values of the charge amount and the discharge amount. The state can be determined.

3) The power control system of the first embodiment is
When the operation monitoring unit 52b determines that there is no abnormality in the power storage device 2 itself and there is an abnormality in the communication system, the operation monitoring unit 52b of the measured values of the charge amount and the discharge amount while maintaining the operation of the power storage device 2 On the other hand, when it is determined that the power storage device 2 itself is abnormal, the operation of the power storage device 2 is stopped.
Therefore, in the power storage device 2, if the discharge amount and the charge amount are not measured due to a communication system abnormality such as a poor connection between the sensor for measuring the discharge amount and the sensor for measuring the charge amount, the power storage device 2 is operated without any abnormality. Can be maintained. Therefore, as compared with the case where the operation of the power storage device 2 is stopped in such a case, efficient power control can be performed without stopping the power storage device 2 unnecessarily.

4) The power control method of the first embodiment is
A load group 3 composed of a plurality of electric power loads installed in a house H as a building and operating by consuming electric power, and
A power storage device 2 provided in the house H that can be charged and discharged, and
A solar cell panel 1 installed in a house H that converts sunlight into electric power to generate electricity.
The power purchased and sold for the commercial power source 20 and the power generated by the solar cell panel 1 are interposed between the commercial power source 20 as an external system power network of the house H and the load group 3 and the power storage device 2 in the house H. , The distribution board 10 that relays the power supplied to the load group 3 and the charge / discharge power to the power storage device 2.
The amount of power purchased and sold with the commercial power source 20, the amount of charge and discharge with the power storage device 2, the power generated by the solar panel 1, and the power supplied to the load group 3 provided in the house H. Each CT sensor 11, 12, 13, 14, 15, 16a to 16n and the measuring device 17 as a power measuring device capable of measuring the total electric energy of the branch circuit as an amount,
It is connected to the house H via the communication network N, and the amount of power purchased, the amount of power sold, the amount of charge, and the amount of discharge in the set period measured by each CT sensor 11, 12, 14, 15, 16a to 16n and the measuring device 17 A power control method in a power control system including an operation monitoring unit 52b of a management server 5 as an abnormality determination device for determining an abnormality of the power storage device 2 based on the amount of power generation and the total amount of power of the branch circuit.
If either the charge amount or the discharge amount of the power storage device 2 in the set period is measured based on the measurements of the CT sensors 11, 12, 13, 14, 15, 16a to 16n and the measuring device 17, the power storage device Step (S102) in which 2 determines that there is no abnormality,
If it is not determined that there is no abnormality in the power storage device 2, the total power consumption of the branch circuit should exceed the total power consumption obtained by subtracting the power sales amount from the value obtained by adding the power generation amount to the power purchase power amount in the set period. For example, if it is determined that there is no abnormality in the power storage device 2 itself and there is an abnormality in the charge amount and discharge amount measurement system, and the total power amount of the branch circuit does not exceed the total power consumption amount, there is an abnormality in the power storage device 2 itself. Steps (S103, S104) and
It is characterized by having.
Therefore, in order to determine the abnormality of the power storage device 2 based on the power purchase amount, the power sale power amount, the charge amount, the discharge amount, the power generation amount, and the total power amount of the branch circuit, information about the power storage device such as the charge amount and the discharge amount is sent. Even if it is not possible, in the management server 5 at a remote location connected to the house H via the communication network N, the power storage device 2 itself is abnormal, or the power storage device 2 itself is normal, and the charge amount and the discharge amount are high. It is possible to determine whether or not there is an abnormality in the communication system that sends the measured value, and determine the state of the power storage device in more detail.

5) The power control method of the first embodiment is
When it is determined that there is no abnormality in the power storage device 2 itself and there is an abnormality in the charge amount and discharge amount measurement system, the step (S106) of stopping the measurement of the charge amount and the discharge amount while maintaining the operation of the power storage device 2. )When,
It is characterized by including a step (S104) of stopping the operation of the power storage device 2 when the power storage device 2 itself is determined to be abnormal.
Therefore, in the power storage device 2, if the discharge amount and the charge amount are not measured due to a communication system abnormality such as a poor connection between the sensor for measuring the discharge amount and the sensor for measuring the charge amount, the power storage device 2 is operated without any abnormality. Can be maintained. Therefore, as compared with the case where the operation of the power storage device 2 is stopped in such a case, efficient power control can be performed without stopping the power storage device 2 unnecessarily.

Although the embodiment has been described in detail with reference to the drawings, the power control system and the power control method of the present invention are not limited to this embodiment, and the design changes to the extent that the gist of the present invention is not deviated. Is included in the present invention.

For example, the power control system of the embodiment has shown an example of being applied to a house provided with a solar cell panel (power generation device), but the present invention is not limited to this, and is also applied to a building not provided with a solar cell panel. be able to.
In this case, the power control system of the embodiment
The load group 3 as a power load that is installed in the house H as a building and operates by consuming electric power,
A power storage device 2 provided in the house H that can be charged and discharged, and
The power purchased and sold for the commercial power source 20 and the power supplied for the load group 3 are interposed between the commercial power source 20 as an external system power network of the house H and the load group 3 and the power storage device 2 in the house H. A distribution board 10 that relays charge / discharge power to the power storage device 2 and
The amount of power purchased and sold with the commercial power source 20, the amount of charge and discharge with the power storage device 2, and the total amount of power supplied to the branch circuit as the amount of power supplied to the load group 3 provided in the house H. CT sensors 11, 12, 14, 15, 16a to 16n and the measuring device 17 as power measuring devices capable of measuring
Power purchased, sold, charged, and discharged in the set period measured by each CT sensor 11, 12, 14, 15, 16a to 16n and the measuring device 17 connected to the house H via the communication network N. The power control system may include an operation monitoring unit 52b of the management server 5 as an abnormality determination device that determines an abnormality of the power storage device 2 based on the total electric energy of the branch circuit.
In this power control system, since the abnormality determination of the power storage device 2 is performed based on the power purchase amount, the power sale amount, the charge amount, the discharge amount, and the total power amount of the branch circuit, information on the power storage device such as the charge amount and the discharge amount can be obtained. Even if the power is not sent, it is possible to determine whether or not there is an abnormality in the power storage device 2 at the management server 5 in a remote location connected to the house H via the communication network N. Therefore, it is possible to provide a power control system capable of more accurately determining an abnormality of the power storage device 2.

Similarly, the power control method of the embodiment
A load group 3 composed of a plurality of electric power loads installed in a house H as a building and operating by consuming electric power, and
A power storage device 2 provided in the house H that can be charged and discharged, and
Intervened between the commercial power source 20 as an external system power network of the house H and the load group 3 and the power storage device 2, input / output of purchased power and sold power to the commercial power source 20, power supply to the load group 3, and storage of power. A distribution board 10 that charges and discharges the device 2 and
Each CT sensor 11, 12, as a power measuring device capable of measuring the amount of power purchased and sold for the commercial power source 20, the amount of charge and discharge for the power storage device 2, and the total amount of power of the branch circuit for the load group 3. 14, 15, 16a to 16n and the measuring device 17,
It is connected to the house H via the communication network N, and the amount of power purchased, sold, charged, and discharged in the set period measured by each CT sensor 11, 12, 14, 15, 16a to 16n and the measuring device 17. A power control method in a power control system including an operation monitoring unit 52b of a management server 5 as an abnormality determination device for determining an abnormality of the power storage device 2 based on the total electric energy of the branch circuit.
Based on the measurements of the CT sensors 11, 12, 14, 15, 16a to 16n and the measuring device 17, if either the charge amount or the discharge amount of the power storage device 2 in the set period is measured, the power storage device 2 will move. Step (S102) for determining that there is no abnormality,
If it is not determined that there is no abnormality in the power storage device 2, and if the total power consumption of the branch circuit exceeds the total power consumption obtained by subtracting the power sales amount from the power purchase power amount in the set period, the power storage device 2 itself If there is no abnormality and it is determined that there is an abnormality in the charge amount and discharge amount measurement system and the total power consumption of the branch circuit does not exceed the total power consumption amount, it is determined that the power storage device 2 itself has an abnormality (S103, S104) and
The power control method may be characterized in that the above is provided.

In this power control method, since the abnormality determination of the power storage device 2 is performed based on the power purchase amount, the power sale amount, the charge amount, the discharge amount, and the total power amount of the branch circuit, information on the power storage device such as the charge amount and the discharge amount is obtained. Even if the power is not transmitted, the abnormality of the power storage device 2 can be more accurately determined by the management server 5 in a remote location connected to the house H via the communication network N.

Further, in the embodiment, a house is shown as a building, but it can be applied to a building other than a house.
Further, in the embodiment, a plurality of days (7 days) are shown as an example of the setting period for adding up the total power consumption amount and the supply power amount (total power amount of the branch circuit), but the present invention is not limited to this. That is, if the power storage device is normal, this setting period may be any period as long as the discharge is executed, and may be one day or a plurality of days, and even if the number of days is a few days to half a month. The date may be about one month. However, the shorter this period is, the more up-to-date state of the power storage device is reflected, and it becomes easier to detect the latest abnormal state.
In addition, in the embodiment, a solar panel that generates electricity by solar power is shown as a power generation device, but if it can generate electricity in a house, fossil fuels such as oil, coal, and natural gas are burned to generate electricity. It is also possible to use other power generation devices, such as those that generate electricity by using kinetic energy from hydraulic power or wind power.

Further, in the embodiment, an example of determining an abnormality of the power storage device based on the amount of power purchased, the amount of power sold, the amount of charge, the amount of discharge, the amount of power supplied, and the amount of power generation has been shown. The abnormality determination based on the voltage, temperature, capacity, etc. of the power storage device that has been performed may be executed.

Further, in the embodiment, if the amount of power supplied is less than the total amount of power consumption obtained by subtracting the amount of power sold from the amount of power purchased, or if it is less than the predetermined amount, the amount is correspondingly. Assuming that the power storage device is charged, it may be determined that there is no abnormality in the power storage device itself and that there is an abnormality in the measured values of the charge amount and the discharge amount.
Alternatively, the power supply amount and the total power consumption amount are compared, and depending on whether or not the difference between the two is within the predetermined range, if it is within the predetermined range, the power storage device charges and discharges. If there is an abnormality in the power storage device itself and the difference between the two exceeds a predetermined range, the power storage device is normally performing at least one of charging and discharging, and the charging amount and discharging amount are measured. It may be determined that an abnormality has occurred in the value.

1 Solar panel (power generation device)
2 Power storage device 3 Load group (power load)
5 Management server 10 Distribution board 11 CT sensor for power purchase (power measuring device)
12 CT sensor for selling power (power measuring device)
13 CT sensor for power generation (power measuring device)
14 CT sensor for discharge (power measuring device)
15 CT sensor for charging (power measuring device)
16a-16n CT sensor for each branch circuit (power measuring device)
17 Measuring device (power measuring device)
20 Commercial power supply (system power grid)
31 Hot water supply device (electric power load)
32 Air conditioner (power load)
52b Operation Monitoring Department H Housing (Building)
N communication network

Claims (5)

The power load that is installed in the building and consumes power to operate,
A power storage device installed in the building that can be charged and discharged,
It is interposed between the grid power network outside the building, the power load in the building, and the power storage device, and is used to buy and sell power for the system power network, supply power to the power load, and charge the power storage device. A distribution board that relays discharge power,
A power measuring device provided in the building and capable of measuring the amount of power purchased and sold with the grid power grid, the amount of charge and discharge with the power storage device, and the amount of power supplied with respect to the power load. ,
The electricity storage is connected to the building via a communication network and is based on the power purchase amount, the power sale amount, the charge amount, the discharge amount, and the supply power amount in the set period measured by the power measuring device. An abnormality judgment device that determines the abnormality of the device and
A power control system characterized by being equipped with. In the power control system according to claim 1,
When the abnormality determination device measures either the charge amount or the discharge amount during the set period, the abnormality determination device determines that there is no abnormality in the power storage device, and either the charge amount or the discharge amount is determined. If the power supply amount exceeds the total power consumption amount of the building obtained by subtracting the power sale power amount from the power purchase power amount, there is no abnormality in the power storage device itself. A power control system characterized in that it is determined that there is an abnormality in the communication system with the power storage device, and if the amount of power supplied does not exceed the total amount of power consumption, it is determined that the power storage device itself has an abnormality. .. In the power control system according to claim 2,
The abnormality determination system, when it is determined that the there is an abnormality in the power storage device abnormality without communication system itself, the power storage device operation of the charge amount and the discharge amount, while maintaining the measured value the abnormality stop input to the decision unit, whereas, when said power storage device itself is determined to be abnormal, the power control system, characterized in that stops the operation of the electric storage device. In the power control system according to claim 2 or 3.
A power generation device is provided in the building, and the power measurement device can also measure the amount of power generated by the power generation device.
The abnormality determination device is a power control system characterized in that the total power consumption is obtained by subtracting the power sold power amount from the value obtained by adding the power generation amount to the power purchase power amount. The power load that is installed in the building and consumes power to operate,
A power storage device installed in the building that can be charged and discharged,
It is interposed between the grid power network outside the building, the power load in the building, and the power storage device, and buys and sells power to the system power network, supplies power to the power load, and charges the power storage device. A distribution board that relays discharge and
A power measuring device provided in the building and capable of measuring the amount of power purchased and sold with the grid power grid, the amount of charge and discharge with the power storage device, and the amount of power supplied with respect to the power load. ,
The electricity storage is connected to the building via a communication network and is based on the power purchase amount, the power sale amount, the charge amount, the discharge amount, and the supply power amount in the set period measured by the power measuring device. An abnormality judgment device that determines the abnormality of the device and
It is a power control method in a power control system equipped with
A step of determining that the power storage device has no abnormality if either the charge amount or the discharge amount is measured during the set period based on the measurement of the power measurement device.
When it is not determined that there is no abnormality in the power storage device, the total power consumption of the building is obtained by subtracting the power sold from the power purchased during the set period, and the power supplied exceeds the total power consumption. If so, it is determined that there is no abnormality in the power storage device itself and there is an abnormality in the communication system with the power storage device, and if the power supply amount does not exceed the total power consumption amount, the power storage device itself has an abnormality. Steps to determine that there is
A power control method characterized by comprising.