JP7037353B2 - Control command system - Google Patents

Description

The present invention relates to a control command system for operating a power conversion device that converts the power of a distributed power source.

In recent years, a system in which a photovoltaic power generation system and a power storage system are linked (hereinafter referred to as a creation and storage cooperation system in the present specification) has become widespread. In the creation and storage cooperation system, a form using a power conversion device called a power station (registered trademark) that integrates a power conditioner for a photovoltaic power generation system and a power conditioner for a power storage system has been put into practical use. ..

Since the power conversion device is often installed outside the house, a control command device for operating the power conversion device is separately provided, and the control command device is connected to the power conversion device by wire / wireless. .. The control command device is further connected to a system other than the creation and storage cooperation system (hereinafter referred to as an external system in the present specification) such as a HEMS (Home Energy Management System) controller in the house or a server of a power transmission and distribution business operator via a network. It is possible to connect.

For example, when the power conversion device receives a charge / discharge command from the HEMS controller via the control command device, the power conversion device charges / discharges the power storage device in accordance with the charge / discharge command. If the creation and storage cooperation system is operated according to the instructions from the HEMS controller, the energy usage efficiency in the house can be improved, which leads to the saving of electricity bill.

Further, when the power conversion device receives an output control command from the server of the power transmission / distribution company via the control command device, the power conversion device complies with the output control command and receives a commercial power system from the solar power generation device (hereinafter, appropriately). , Simply called the grid) to control the amount of power output. In Japan, the feed-in tariff system for renewable energy requires photovoltaic power generation companies to cooperate with output control from power transmission and distribution companies. Therefore, if an electric power exceeding the electric energy specified by the output control command is output to the grid, it is a violation of the law.

Japanese Patent No. 6024929 Japanese Unexamined Patent Publication No. 2013-51833

The user of the creation and storage cooperation system can appropriately change the settings such as the operation mode by operating the control command device. However, if the user changes the settings of the creation and storage cooperation system while the creation and storage cooperation system is operating based on a command from the external system, legal violations and economic disadvantages may occur.

The present invention has been made in view of such a situation, and an object of the present invention is to provide a control command system capable of preventing a user from unintentionally performing an unfavorable operation in the operation of a power conversion device. There is something in it.

In order to solve the above problems, the control command system according to an aspect of the present invention is derived from a first communication unit that communicates with a power conversion device that converts electric power of a distributed power supply device, and an external system other than the power conversion device. It includes a second communication unit that receives a command to the power conversion device, and a control unit that prohibits change of a predetermined setting item of the power conversion device for a period in which the command from the external system is valid.

According to the present invention, it is possible to prevent the user from unintentionally performing an unfavorable operation in the operation of the power conversion device.

It is a figure for demonstrating the creation and saving cooperation system which concerns on embodiment of this invention. It is a figure which shows an example of the screen which is displayed on the display part of a control command device, and an operation part. It is a figure which shows an example of a menu screen. 4 (a)-(c) are diagrams showing an example of an operation mode setting screen, a date / time setting screen, and a regional setting screen. 5 (a) and 5 (b) are diagrams showing an example of an error screen displayed during external control and an error screen displayed during a period in which output control is valid. It is a flowchart which shows the operation of the control command apparatus when the change operation of a predetermined setting item is carried out.

FIG. 1 is a diagram for explaining a creation-saving cooperation system according to an embodiment of the present invention. The creation and storage cooperation system includes a photovoltaic power generation device 1, a power storage device 2, a power conversion device 10, and a control command device 20. The power conversion device 10 is an integrated power conversion device that integrates the power conditioner function for the solar power generation device 1 and the power conditioner function for the power storage device 2, and is the first DC / DC converter 11 and the first. It includes a 2DC / DC converter 12, an inverter 13, and a control circuit 14.

The photovoltaic power generation device 1 is a power generation device that directly converts light energy into electric power by utilizing the photovoltaic effect. The photovoltaic power generation device 1 includes a solar cell such as a silicon solar cell, a solar cell made of a compound semiconductor or the like, a dye-sensitized solar cell, or an organic thin film solar cell. The photovoltaic power generation device 1 is connected to the first DC / DC converter 11 of the power conversion device 10, and outputs the generated power to the first DC / DC converter 11. The first DC / DC converter 11 is a converter connected between the photovoltaic power generation device 1 and the DC bus B1 and capable of adjusting the voltage of the DC power output from the photovoltaic power generation device 1. The first DC / DC converter 11 can be configured by, for example, a step-up chopper.

The power storage device 2 can charge and discharge electric power, and includes a storage battery such as a lithium ion storage battery, a nickel hydrogen storage battery, and a lead storage battery. Instead of the storage battery, a capacitor such as an electric double layer capacitor or a lithium ion capacitor may be provided. The power storage device 2 is basically assumed to be a stationary type, but may be an in-vehicle power storage device mounted on an EV. The power storage device 2 is connected to the second DC / DC converter 12 of the power conversion device 10, and is charged / discharged controlled by the second DC / DC converter 12. The second DC / DC converter 12 is a bidirectional DC / DC converter connected between the power storage device 2 and the DC bus B1 to charge and discharge the power storage device 2.

The inverter 13 is a bidirectional inverter connected between the DC bus B1 and the distribution board 4, converts the DC power input from the DC bus B1 into AC power, and connects the converted AC power to the system 3. It is output to the distributed distribution board 4. The system 3, the power conversion device 10, and the load 5 are connected to the distribution board 4. Load 5 is a general term for loads in the house. Further, the inverter 13 converts the AC power supplied from the system 3 via the distribution board 4 into DC power, and outputs the converted DC power to the DC bus B1.

The control circuit 14 controls the entire power conversion device 10. The control circuit 14 can be realized by the collaboration of hardware resources and software resources, or only by hardware resources. Analog devices, microcomputers, DSPs, ROMs, RAMs, FPGAs, and other LSIs can be used as hardware resources. Programs such as firmware can be used as software resources.

The control circuit 14 executes MPPT (Maximum Power Point Tracking) control of the photovoltaic power generation device 1 by controlling the first DC / DC converter 11. Specifically, the control circuit 14 measures the input voltage and input current of the first DC / DC converter 11, which are the output voltage and output current of the photovoltaic power generation device 1, and estimates the generated power of the photovoltaic power generation device 1. .. The control circuit 14 is a voltage command value for setting the generated power of the photovoltaic power generation device 1 to the maximum power point (optimal operating point) based on the measured output voltage of the photovoltaic power generation device 1 and the estimated generated power. To generate. For example, according to the hill climbing method, the operating point voltage is changed by a predetermined step width to search for the maximum power point, and a voltage command value is generated so as to maintain the maximum power point. The first DC / DC converter 11 performs a switching operation according to a drive signal based on the generated voltage command value.

The control circuit 14 executes stabilization control of the DC bus B1 by controlling the inverter 13. Specifically, the control circuit 14 detects the voltage of the DC bus B1 and generates a current command value for matching the detected bus voltage with the threshold voltage. The control circuit 14 generates a current command value for increasing the duty ratio of the inverter 13 when the voltage of the DC bus B1 is higher than the threshold voltage, and the duty ratio of the inverter 13 when the voltage of the DC bus B1 is lower than the threshold voltage. Generates a current command value to reduce. The inverter 13 performs a switching operation so as to match the output current with the generated current command value.

The control circuit 14 executes charge / discharge control of the power storage device 2 by controlling the second DC / DC converter 12. The second DC / DC converter 12 charges and discharges the power storage device 2 with a constant current (CC) / constant voltage (CV) based on the current command value / voltage command value set from the control circuit 14. For example, when the power storage device 2 is operated by following the photovoltaic power generation device 1 and / or the load 5, the control circuit 14 generates a current command value of the second DC / DC converter 12 according to the voltage of the DC bus B1. ..

The control command device 20 is a terminal device for operating the power conversion device 10. The power conversion device 10 and the power conversion device 10 may be connected by wire or wirelessly. In this embodiment, it is assumed that the two are connected by a cable compliant with the RS-485 standard.

The control command device 20 includes a control unit 21, a storage unit 22, a first communication unit 23, a second communication unit 24, a display unit 25, and an operation unit 26. The first communication unit 23 executes communication with the power conversion device 10. In the present embodiment, serial communication conforming to the RS-485 standard is executed with the power conversion device 10. The second communication unit 24 executes communication with an external system other than the creation and storage cooperation system. The second communication unit 24 is connected to the router device 6. The second communication unit 24 and the router device 6 may be connected by wire or wirelessly. For example, communication conforming to the Ethernet (registered trademark) standard and the WiFi (registered trademark) standard is executed between the two.

In this embodiment, the external system can be connected to the HEMS (Home Energy Management System) controller 7 and the power transmission and distribution business operator server 9. In this specification, a system other than the creation and storage cooperation system is defined as an external system in a broad sense, and a system other than a system belonging to a customer including a creation and storage cooperation system and HEMS is defined as an external system in a narrow sense. The HEMS controller 7 corresponds to an external system in a broad sense, but does not correspond to an external system in a narrow sense. The power transmission and distribution business operator server 9 corresponds to both an external system in a broad sense and an external system in a narrow sense.

The HEMS controller 7 is a controller installed in a customer's house, monitors the power supply status and the consumption status in the house, and centrally manages the energy in the house. For example, the HEMS controller 7 is wired or wired to a load 5 (for example, a lighting, an air conditioner, an air purifier, a heat pump water heater, an IH cooking heater, etc.), a smart meter, a temperature sensor, a humidity sensor, etc., which have a function of linking with the HEMS controller 7. Connected wirelessly.

In FIG. 1, the HEMS controller 7 is connected to the control command device 20 via the router device 6. The HEMS controller 7 and the control command device 20 may be connected by a dedicated cable. In that case, a predetermined modbus communication is executed between the two.

The second communication unit 24 of the control command device 20 can communicate with the power transmission and distribution business operator server 9 connected to the Internet 8 via the router device 6. The power transmission and distribution business server 9 is a server of a business that manages and operates the transmission and distribution network. As of 2017, the transmission and distribution network is monopolized by 10 electric power companies in Japan. From April 2020, it is planned to implement the power transmission and distribution separation that separates the power generation business and the power transmission and distribution business of the electric power company.

Due to the revision of the Act on Special Measures for Renewable Energy in January 2015, it is necessary to respond to the request for output control from the electric power company without limitation and without compensation for the renewable energy power generation equipment systematized beyond a certain standard. Was stipulated. With the expansion of the feed-in tariff system for renewable energy, the number of renewable energy power generation facilities that are interconnected to the grid is increasing, and the supply-demand balance of the grid is more likely to be disrupted than before. When the power supply to the grid exceeds the power demand, the voltage / frequency of the grid rises, and when the power supply to the grid falls below the power demand, the voltage / frequency of the grid falls.

The power transmission and distribution business operator can use output control to keep the voltage and frequency of the system within a predetermined range. Output control is control that commands the controller of the power generation facility to suppress the output from the power generation facility to the grid. In the present embodiment, the photovoltaic power generation device 1 is the target of output control. In Japan, reverse power flow from the storage battery to the grid is prohibited, so the power storage device 2 is not subject to output control.

A power company that has a power grid first reduces the amount of power generated by its power generation equipment when the power supply is exceeded. Even with this, if the excess power supply cannot be resolved, output control is performed. In areas where there are many renewable energy power generation facilities connected to the grid, where there are few consumers, or where the capacity of the grid is small, the frequency of activation of output control is high.

The power transmission and distribution business operator server 9 predicts the power supply and demand of the system 3 based on the weather forecast, the load prediction, and the like, and determines whether or not output control is necessary. When output control is required, the power transmission and distribution business operator server 9 determines the output control schedule and the upper limit of the output power. The schedule is specified, for example, in 30-minute units. The upper limit of the output power is defined by, for example, a ratio [%] to the rated output power of the power generation facility, and is specified in units of 1%.

The control command device 20 acquires an output control command from the power transmission and distribution business operator server 9 via the Internet 8. The output control command includes the upper limit of the output power for each time zone. In principle, the content of output control is determined the day before. The content of output control will be changed as appropriate according to changes in weather conditions and load fluctuations on the day.

The display unit 25 of the control command device 20 includes a liquid crystal display or an organic EL display, and displays information supplied from the control unit 21 on the screen. The operation unit 26 includes a touch panel and / or a physical button, converts a physical operation by the operator into an electrical operation signal, and outputs the physical operation to the control unit 21.

The control unit 21 can be realized by the collaboration of hardware resources and software resources, or only by hardware resources. Microcomputers, ROMs, RAMs, and other LSIs can be used as hardware resources. Programs such as firmware can be used as software resources. The storage unit 22 is composed of a non-volatile memory.

FIG. 2 is a diagram showing an example of a screen displayed on the display unit 25 of the control command device 20 and the operation unit 26. The display area of the screen 25a shown in FIG. 2 is formed by a first display area 251, a second display area 252, a third display area 253, and a fourth display area 254.

The operating state, mode, device connection state icon, and time of the power conversion device 10 are displayed in the first display area 251. The operating state of the power conversion device 10 includes "interconnection operation", "interconnection stop", and "interconnection standby". "During interconnection operation" is a state in which the system is connected to the system 3 and is being operated. "The interconnection is stopped" is a state in which the photovoltaic power generation device 1, the power storage device 2, and the system power supply are all stopped. The stop includes manual stop and stop due to abnormality detection. The stop due to abnormality detection also includes a communication abnormality between the power conversion device 10 and the control command device 20. "During interconnection standby" is a state in which the photovoltaic power generation device 1, the power storage device 2, and the system power supply are all on standby.

The modes include "economic priority", "environment priority", "storage priority", "external control", and "output control". "Economic priority" is a mode of operation according to a set charge / discharge time. This mode is selected during peak shift operation, and can be charged at night when electricity charges are low and discharged during times when electricity charges are high. The charging time zone and the discharging time zone can be set by the user. It should be noted that the storage battery cannot be discharged during the period when the generated power of the photovoltaic power generation device 1 is sold. "Environmental priority" is a mode in which the surplus electricity generated by the photovoltaic power generation device 1 is charged in the daytime and the charged electricity is used in the evening or at night. This mode can reduce the amount of electricity purchased from the electric power company. The "storage priority" is a mode in which charging is prioritized so that the storage device 2 is always fully charged. After charging is complete, wait for a power outage.

"External control" is a mode in which the operation is performed based on an instruction from the HEMS controller 7. "Output control" is a mode when the main body is in output control based on an output control command from the power transmission and distribution business operator server 9. When the connection of the power storage device 2 is invalid, the mode is basically not displayed in the first display area 251 but when the main body is in output control, "output control" is displayed.

In the second display area 252, the operating state of the photovoltaic power generation device 1, the icon of the solar panel, and the power generation amount [kW] are displayed. The operating state of the photovoltaic power generation device 1 includes "power generation", "stopping", and "standby". "Power generation" is a state in which the photovoltaic power generation device 1 is generating power. "Stopped" is a state in which power generation is stopped regardless of the presence or absence of solar radiation. "Stopping" also includes the time when data is not acquired or the time when communication is abnormal between the power conversion device 10 and the control command device 20. "Standby" is a state in which there is no solar radiation and no power is generated, but if there is solar radiation, power can be generated at any time.

In the third display area 253, the operating state of the power storage device 2, the icon of the storage battery, the charge / discharge amount [kW], and the remaining capacity [%] are displayed. The operating state of the power storage device 2 includes "charging", "discharging", "stopping", "standby", and "not connected". "Charging" is a state in which electric power from the photovoltaic power generation device 1 and / or the system 3 is stored. "Discharging" is a state in which the stored electric power is being output. "Stopping" is a state in which charging / discharging is stopped. When the connection of the power storage device 2 is invalid, "stopped" is always displayed. "Stopping" also includes the time when data is not acquired or the time when communication is abnormal between the power conversion device 10 and the control command device 20. "Standby" is a state in which charging / discharging is not performed, but charging / discharging is possible at any time as needed. "Not connected" is a state in which the power storage device 2 is not connected.

The input / output status of the system power supply is displayed in the fourth display area 254. The input / output states of the grid power supply include "input", "output", "stopped", and "standby". "Inputting" is a state in which the electric power from the system 3 is being charged to the power storage device 2. “During output” outputs the generated power of the photovoltaic power generation device 1 and / or the discharge power from the power storage device 2 to the distribution board 4 to supply power to the system 3 (power sale) and / or the load 5. It is in a state of being. "Stopping" is a state in which input / output is stopped. The “stopped” includes the time when data is not acquired or the time when the communication between the power conversion device 10 and the control command device 20 is abnormal. "Standby" is a state in which input / output has not occurred, but can be input / output at any time according to the power generation status of the photovoltaic power generation device 1, the charge / discharge set time, and the usage status of the load 5.

The operation unit 26a shown in FIG. 2 includes a decision key 261, a menu / return key 262, and a cross key 263. These keys may be physical keys or touch panel keys. When the menu / return key 262 is pressed on the screen 25a (top screen) shown in FIG. 2, the screen transitions to the menu screen.

FIG. 3 is a diagram showing an example of the menu screen 25b. In the menu screen 25b shown in FIG. 3, as setting items, "operation mode setting", "date and time setting", "regional setting", "charge / discharge time zone setting", "discharge lower limit setting", "breaker current upper limit setting", "breaker current upper limit setting", " "Contract power upper limit setting" is shown. The worker or the user of the contractor operates the operation unit 26 and inputs the setting contents for each setting item. The contents set in each setting item can be changed after the fact.

As the "charge / discharge time zone setting", the user sets a time zone for charging the power storage device 2 and / or a time zone for discharging from the power storage device 2. Especially when "economic priority" is selected as the operation mode, it is an indispensable setting item. The user sets the minimum capacity to be secured in the power storage device 2 as the "discharge lower limit setting". This capacity is a capacity secured in the power storage device 2 even during discharging due to a peak shift. The worker or user of the contractor sets the current value at which the breaker operates as the "breaker current upper limit setting", and sets the power value contracted with the electric power company as the "contracted power upper limit setting".

4 (a)-(c) are diagrams showing an example of an operation mode setting screen 25c, a date / time setting screen 25d, and a regional setting screen 25e. When the enter key 261 is pressed while "operation mode setting" is selected on the menu screen 25b shown in FIG. 3, the screen transitions to the operation mode setting screen 25c shown in FIG. 4A. The user selects a desired mode from "economic priority", "environment priority", and "storage priority" displayed in the operation mode setting screen 25c.

When the enter key 261 is pressed while "date and time setting" is selected on the menu screen 25b shown in FIG. 3, the screen transitions to the date and time setting screen 25d shown in FIG. 4 (a). The contractor's worker or user sets the current date and time from this screen.

On the menu screen 25b shown in FIG. 3, when the enter key 261 is pressed while "regional setting" is selected, the screen transitions to the regional setting screen 25e shown in FIG. 4 (c). Japan's power transmission and distribution network is locally monopolized by 10 electric power companies: Hokkaido Electric Power, Tohoku Electric Power, Tokyo Electric Power, Chubu Electric Power, Hokuriku Electric Power, Kansai Electric Power, Chugoku Electric Power, Shikoku Electric Power, Kyushu Electric Power, and Okinawa Electric Power. The above-mentioned output control command needs to be acquired from the power transmission and distribution business operator server 9 operated and managed by any of the 10 electric power companies. The worker or user of the contractor selects which of the 10 electric power companies has jurisdiction over the area where the creation and storage cooperation system is installed. In addition, it may be a specification for inputting / selecting attribute information related to a region such as a local division, a prefecture, or a municipality. In that case, the control unit 21 identifies the electric power company having jurisdiction based on the input / selected attribute information.

In principle, it is possible to change the setting contents of the setting items described above at any time, but there are exceptional cases where changing the setting contents should be prohibited. For example, it is prohibited to change the setting contents of "date and time setting" and "regional setting" while the output control is valid. As described above, the transmission and distribution network is divided into regions, and the output control command needs to be acquired from the transmission and distribution operator server 9 that has jurisdiction over the transmission and distribution network in the region where the creation and storage cooperation system is installed. The output control command is defined by the schedule and the upper limit of the output power. In addition, the content of the output control command may be changed at any time on the day due to climate change or the like.

Therefore, if the user is allowed to freely change the "date and time setting" during the period when the output control is valid, there is a possibility of violating the law regarding the output control in a place not intended by the user. For example, if the time shifts, there is a possibility that the electric power exceeding the upper limit value is output to the system 3.

Further, when the content of the output control command is changed, the control command device 20 needs to access the power transmission and distribution business operator server 9 to acquire a new output control command. If the user is allowed to freely change the "regional setting" during the period when the output control is valid, the user may access the transmission and distribution company server 9 in another region at an unintended place to transmit and distribute another power. There is a possibility that the output control command of the network will be acquired.

The above-mentioned HEMS controller 7 has a function of supporting power saving in the house. For example, the HEMS controller 7 can display the amount of power generation and the amount of power consumption on the display in real time, and can visualize the power status in the house. In addition, it is possible to raise the user's awareness of power saving by collecting the power consumption for each time zone / load as data, specifying the time zone or device with a large power consumption, and presenting it to the user.

Further, the HEMS controller 7 can determine a time zone for discharging from the power storage device 2 based on the amount of electric power used for each time zone, and can transmit a discharge command to the control command device 20 during that time zone. Further, the HEMS controller 7 can transmit a charge command to the control command device 20 during a time period when the electricity charge is low (for example, from 23:00 to 7:00 the next day and from 22:00 to 8:00 the next day).

Further, the HEMS controller 7 can transmit a discharge command to the control command device 20 when the power consumption of the load 5 in the house exceeds a predetermined peak value. Further, the HEMS controller 7 can transmit a discharge command release command to the control command device 20 when the power consumption of the load 5 in the house falls below a predetermined peak value for a predetermined time or more.

When the operation mode is set to "economic priority" or "environment priority", the power conversion device 10 accepts external control from the HEMS controller 7 and operates according to the external control. When the operation mode is set to "storage priority", the power conversion device 10 rejects the external control from the HEMS controller 7. Even when the operation mode is set to "environment priority", it may be set to reject external control from the HEMS controller 7.

Generally, it is better to follow the external control from the HEMS controller 7 to save electricity charges. Therefore, if the user changes the operation mode during external control from the HEMS controller 7, the user may unknowingly abandon the enjoyment of the economic merit.

5 (a) and 5 (b) are diagrams showing an example of an error screen 25f displayed during external control and an error screen 25g displayed during a period in which output control is valid. The error screen 25f shown in FIG. 5A is when the determination key 261 is pressed while the “operation mode” is selected on the menu screen 25b shown in FIG. 3 during external control from the HEMS controller 7. Is displayed. On the error screen 25f, an error message "Cannot be set because external control is in progress" is displayed. In the error screen 25g shown in FIG. 5B, the enter key 261 is pressed while "date and time setting" or "regional setting" is selected on the menu screen 25b shown in FIG. 3 while the output control is valid. It is displayed when it is done. On the error screen 25g, an error message "Cannot be set because output control is enabled." Is displayed.

FIG. 6 is a flowchart showing the operation of the control command device 20 when a predetermined setting item change operation is performed. When the control unit 21 of the control command device 20 receives a command from an external system in a broad sense (Y in S10), the control unit 21 prohibits the change of a predetermined setting item (S11). Specific examples of setting items that prohibit changes have already been described.

When the validity period of the command received from the external system in a broad sense expires (Y in S12), the control unit 21 releases the prohibition of changing the predetermined setting item (S13). In the case of an output control command, since it is defined by the upper limit of the output power for each time zone, the end time of the time zone is the expiration time of the expiration date. In the case of a charge / discharge command from the HEMS controller 7, a release command is usually transmitted from the HEMS controller 7 at the timing of stopping the charge / discharge. In this case, the time when the cancellation command is received is the expiration time of the expiration date. If the release command is not transmitted from the HEMS controller 7 even after a predetermined time (for example, 12 hours) has elapsed after receiving the charge / discharge command from the HEMS controller 7, the charge / discharge command is terminated. In this case, the time after the lapse of a predetermined time after receiving the charge / discharge command is the expiration time of the expiration date.

As described above, according to the present embodiment, it is possible to prevent the user from unintentionally performing an unfavorable operation in the operation of the power conversion device 10. For example, it is possible to prevent the user from unknowingly violating the law during output control. The same applies to the workers of the contractor and the workers of maintenance. Further, it is possible to prevent the user from unknowingly performing an economically disadvantageous operation during external control from the HEMS controller 7. Further, by prohibiting the change of the operation mode, the user can recognize that the external control is in progress.

The present invention has been described above based on the embodiments. It is understood by those skilled in the art that the embodiments are exemplary and that various modifications are possible for each of these components and combinations of processing processes, and that such modifications are also within the scope of the present invention. ..

In the above-described embodiment, a creation-saving cooperation system in which both the photovoltaic power generation device 1 and the power storage device 2 are connected is assumed. In this respect, when only the photovoltaic power generation device 1 is connected, the power conversion device 10 functions as a power conditioner for a solar cell, and the photovoltaic power generation device 1 and the power conversion device 10 function as a photovoltaic power generation system. On the other hand, when only the power storage device 2 is connected, the power conversion device 10 functions as a power conditioner for a storage battery, and the power storage device 2 and the power conversion device 10 function as a power storage system.

Even in the case of a photovoltaic power generation system, the control that prohibits the change of the "date and time setting" and the "regional setting" during the period when the output control is effective is effective. Further, even in the case of the power storage system, the control for prohibiting the change of the "operation mode" during the external control from the HEMS controller 7 is effective.

Further, when the external control command from the HEMS controller 7 is a command in a format including a valid time zone, the change of the "date and time setting" is prohibited during the period when the external control from the HEMS controller 7 is valid.

Further, a server for external control having the same function as the HEMS controller 7 may be installed on the Internet 8. In that case, the control command device 20 receives an external control command from the server via the Internet 8.

In the above-described embodiment, a dedicated terminal device is assumed as the control command device 20, but it is also possible to use a smartphone terminal device in which a dedicated application program is installed.

The embodiment may be specified by the following items.

[Item 1]
The first communication unit (23) that communicates with the power conversion device (10) that converts the power of the distributed power supply devices (1, 2), and
A second communication unit (24) that receives a command to the power conversion device (10) from an external system (7, 9) other than the power conversion device (10).
The control unit (21) for prohibiting the change of a predetermined setting item of the power conversion device (10) is provided for a period in which the command from the external system (7, 9) is valid.
Control command system (20).
According to this, it is possible to prevent the user from unintentionally performing an unfavorable operation in the operation of the power conversion device (10).
[Item 2]
The distributed power supply device (1, 2) is a photovoltaic power generation device (1).
The command from the external system (9) includes an output control command regarding the output from the photovoltaic power generation device (1) to the system (3).
The control command system (20) according to item 1.
According to this, it is possible to prevent the voltage / frequency of the system (3) from becoming unstable.
[Item 3]
The control unit (21) prohibits the date and time change of the power conversion device (10) during the period when the output control is valid.
The control command system (20) according to item 2.
According to this, it is possible to prevent the violation of the law regarding the output control of the photovoltaic power generation device (1).
[Item 4]
The command from the external system (7) includes a charge / discharge command from the HEMS (Home Energy Management System) controller.
The control command system (20) according to item 1.
According to this, the energy efficiency in the house can be improved.
[Item 5]
The control unit (21) prohibits the change of the operation mode of the power conversion device (10) during the period when the charge / discharge command is valid.
The control command system (20) according to item 4.
According to this, it is possible to prevent the user from unknowingly performing an economically disadvantageous operation.

The subject of the device, system, or method in the present disclosure comprises a computer. By executing the program by this computer, the function of the subject of the device, system, or method in the present disclosure is realized. A computer has a processor that operates according to a program as a main hardware configuration. The type of processor does not matter as long as the function can be realized by executing the program. The processor is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or an LSI (Large Scale Integration). A plurality of electronic circuits may be integrated on one chip or may be provided on a plurality of chips. A plurality of chips may be integrated into one device, or may be provided in a plurality of devices. The program is recorded on a non-temporary recording medium such as a computer-readable ROM, optical disc, or hard disk drive. The program may be stored in a recording medium in advance, or may be supplied to the recording medium via a wide area communication network including the Internet or the like.

1 Solar power generation device, 2 Power storage device, 3 systems, 4 distribution board, 5 load, 6 router device, 7 HEMS controller, 8 Internet, 9 power transmission and distribution company server, 10 power converter, 11 1st DC / DC converter , 12 2nd DC / DC converter, 13 Inverter, 14 Control circuit, 20 Control command device, 21 Control unit, 22 Storage unit, 23 1st communication unit, 24 2nd communication unit, 25 Display unit, 26 Operation unit, B1 DC bus.

Claims (3)

The first communication unit that communicates with the power conversion device that converts the power of the photovoltaic power generation device ,
A second communication unit that receives a command to the power conversion device from an external system other than the power conversion device, and
An operation unit that receives input of setting contents of the setting items of the power conversion device based on the user's operation, and an operation unit.
Control that prohibits the change of the date and time setting of the power conversion device based on the user's operation on the operation unit for the period specified in the schedule included in the output control command regarding the output from the photovoltaic power generation device to the system from the external system. With a department,
Control command system. In the control unit, the power conversion device based on the user's operation on the operation unit was installed for a period specified by the schedule included in the output control command regarding the output from the photovoltaic power generation device to the system from the external system. Setting the area Prohibit changing the area setting,
The control command system according to claim 1. The first communication unit that communicates with the power conversion device that converts the power of the power storage device,
With a second communication unit that monitors the power supply status and consumption status in the customer's home and receives commands to the power conversion device from the HEMS (Home Energy Management System) controller that centrally manages the energy in the home. ,
An operation unit that receives input of setting contents of setting items including at least the operation mode of the power conversion device based on the user's operation.
The operation mode includes at least an external control mode for operating according to a charge / discharge command from the HEMS controller and an economic priority mode for operating according to a preset charge / discharge time.
The period from the reception of the charge / discharge command for causing the power conversion device to control the charge / discharge of the power storage device to the reception of the release command of the charge / discharge command from the HEMS controller, or the reception of the charge / discharge command. A control unit that sets the power conversion device to the external control mode and prohibits the change of the operation mode of the power conversion device based on the user's operation with respect to the operation unit during the period from the time when the predetermined time elapses. Equipped with
Control command system.

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