JP2019118210A - Control command system - Google Patents

Abstract

To prevent a user from performing disadvantageous operation without intention in the operation of a power conversion device (10).SOLUTION: A first communication unit (23) communicates with a power conversion device (10) that converts power of distributed power supply devices (1 and 2). A second communication unit (24) receives a command to the power conversion device (10) from external systems (7 and 9) other than the power conversion device (10). A control unit (21) prohibits a predetermined setting item of the power conversion device (10) from being changed during a period when commands from the external systems (7 and 9) are effective.SELECTED DRAWING: Figure 1

Description

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

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

  Since the power conversion device is often installed outside the home, 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 in a wired or wireless manner. . The control commanding device further includes a network other than a wound storage collaboration system (hereinafter, referred to as an external system) such as a home energy management system (HEMS) controller in a home or a server of a power transmission / distribution provider. It is connectable.

  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 according to the charge / discharge command. Operating the wound storage collaboration system according to the instruction from the HEMS controller can increase the energy use efficiency in the home, which leads to the saving of electricity costs.

  In addition, when the power conversion device receives an output control command from the server of the power transmission and distribution company via the control command device, the power conversion device receives the output control command from the solar power generation device to the commercial power grid Control the amount of power output to the system). In Japan, photovoltaic power generation companies are required to cooperate with power control from power transmission and distribution companies under the fixed price purchase system of renewable energy. Therefore, if the amount of power exceeding the amount of power specified by the output control command is output to the system, the law will be violated.

Patent No. 6024929 JP, 2013-51833, A

  The user of the wound storage collaboration system can appropriately change the setting of the operation mode and the like by operating the control command device. However, if the user changes the settings of the wound storage collaboration system while the wound storage collaboration system is operating based on a command from the external system, a violation of laws and regulations or an economic demerit may occur.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a control command system capable of preventing a user from unintentionally performing an operation in an operation of a power conversion device. It is.

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

  According to the present invention, in the operation of the power conversion device, it is possible to prevent the user from performing an disadvantageous operation without intention.

It is a figure for demonstrating the wound storage cooperation system which concerns on embodiment of this invention. It is a figure which shows an example of the screen displayed on the display part of a control command apparatus, and an operation part. It is a figure which shows an example of a menu screen. FIGS. 4A to 4C are diagrams showing an example of the operation mode setting screen, the date and time setting screen, and the area setting screen. FIGS. 5A and 5B 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 flow chart which shows operation of a control commanding device when change operation of a predetermined setting item is carried out.

  FIG. 1 is a diagram for explaining a wound storage cooperation system according to the embodiment of the present invention. The wound storage collaboration system includes a solar power generation device 1, a power storage device 2, a power conversion device 10, and a control command device 20. The power converter 10 is an integrated power converter in which a power conditioner function for the solar power generation device 1 and a power conditioner function for the power storage device 2 are integrated, and the first DC / DC converter 11, the first 2 DC / DC converter 12, inverter 13 and control circuit 14 are provided.

  The solar power generation device 1 is a power generation device that converts light energy directly into electric power by using the photovoltaic effect. The solar 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, an organic thin film solar cell or the like. The solar power generation device 1 is connected to the first DC / DC converter 11 of the power conversion device 10, and outputs the generated electric power to the first DC / DC converter 11. The first DC / DC converter 11 is a converter that is connected between the solar power generation device 1 and the DC bus B <b> 1 and is capable of adjusting the voltage of the DC power output from the solar power generation device 1. The first DC / DC converter 11 can be configured, for example, by a step-up chopper.

  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, or a lead storage battery. In addition, you may provide capacitors, such as an electric double layer capacitor and a lithium ion capacitor, instead of a storage battery. The storage device 2 basically assumes a stationary type, but may be a vehicle-mounted 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 charge / discharge is 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 B <b> 1 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. The inverter 13 converts DC power input from the DC bus B1 into AC power and connects the converted AC power to the grid 3 Output to the distribution board 4 that has been The grid 3, the power conversion device 10, and the load 5 are connected to the distribution board 4. The load 5 is a generic term for the load at home. The inverter 13 also converts AC power supplied from the system 3 through 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 cooperation of hardware resources and software resources, or hardware resources only. As hardware resources, analog elements, microcomputers, DSPs, ROMs, RAMs, FPGAs, and other LSIs can be used. As software resources, programs such as firmware can be used.

  The control circuit 14 controls the first DC / DC converter 11 to execute MPPT (Maximum Power Point Tracking) control of the solar power generation device 1. Specifically, the control circuit 14 measures the input voltage and the input current of the first DC / DC converter 11, which are the output voltage and the output current of the solar power generation device 1, and estimates the generated power of the solar power generation device 1. . The control circuit 14 sets a voltage command value for setting the generated power of the solar power generation device 1 to the maximum power point (optimum operating point) based on the measured output voltage of the solar power generation device 1 and the estimated generated power. Generate For example, the maximum power point is searched by changing the operating point voltage with a predetermined step width according to the hill climbing method, and a voltage command value is generated so as to maintain the maximum power point. The first DC / DC converter 11 performs switching operation according to the drive signal based on the generated voltage command value.

  The control circuit 14 controls the inverter 13 to execute stabilization control of the DC bus B1. Specifically, the control circuit 14 detects the voltage of the DC bus B1 and generates a current command value for causing the detected bus voltage to coincide with the threshold voltage. Control circuit 14 generates a current command value for increasing the duty ratio of inverter 13 when the voltage of DC bus B1 is higher than the threshold voltage, and the duty ratio of inverter 13 when the voltage of DC bus B1 is lower than the threshold voltage. Generates a current command value to lower the The inverter 13 performs switching operation to match the output current to the generated current command value.

  Control circuit 14 controls charging / discharging control of power storage device 2 by controlling second DC / DC converter 12. Second DC / DC converter 12 charges / discharges power storage device 2 with constant current (CC) / constant voltage (CV) based on the current command value / voltage command value set from control circuit 14. For example, when the storage device 2 is operated following the solar 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 may be connected wirelessly. In the present embodiment, it is assumed that both are connected by a cable conforming to 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 compliant with the RS-485 standard is performed with the power conversion device 10. The second communication unit 24 executes communication with an external system other than the wound storage collaboration 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 may be connected wirelessly. For example, communication compliant with Ethernet (registered trademark) and WiFi (registered trademark) standards is performed between the two.

  In the present embodiment, the external system is configured to be connectable to a Home Energy Management System (HEMS) controller 7 and a transmission / distribution provider server 9. In the present specification, a system other than the wound storage collaboration system is defined as an external system in a broad sense, and a system other than the wound storage collaboration system and the system belonging to the customer including HEMS is defined as the narrow system. 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 company server 9 corresponds to an external system in a broad sense and an external system in a narrow sense.

  The HEMS controller 7 is a controller that is installed in the home of a customer, monitors the supply and consumption of power in the home, and centrally manages the energy in the home. For example, the HEMS controller 7 is wired to the load 5 (for example, lighting, air conditioner, air purifier, heat pump water heater, IH cooking heater, etc.), smart meter, temperature sensor, humidity sensor, etc. Connected by wireless.

  In FIG. 1, the HEMS controller 7 is depicted as being 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 performed between the two.

  The second communication unit 24 of the control command device 20 can communicate with the power transmission and distribution company server 9 connected to the Internet 8 via the router device 6. The transmission / distribution provider server 9 is a server of a provider who manages and operates the transmission / distribution network. As of 2017, transmission and distribution networks in Japan are being locally monopolized by 10 power companies. From April 2020, it is planned to carry out the separation of power generation and transmission and distribution businesses of electric power companies.

  With the revision of the Renewable Energy Special Measures Act of January 2015, it is necessary for system-based renewable energy power generation facilities to meet the power control request from the power company without limit and without compensation. Was defined. With the expansion of the fixed price purchase system for renewable energy, renewable energy generation facilities connected to the grid are increasing, and the balance between supply and demand of the grid is more likely to break down than before. When the power supply to the grid exceeds the power demand, the voltage and frequency of the grid increase, and when the power supply to the grid falls below the power demand, the voltage and frequency of the grid decrease.

  The transmission and distribution provider can use the output control to keep the voltage and frequency of the grid within a predetermined range. The output control is control for instructing the controller of the power generation facility to suppress the output from the power generation facility to the grid. In the present embodiment, the solar power generation device 1 is a target of output control. In Japan, reverse flow from the storage battery to the system is prohibited, so the power storage device 2 is not subjected to output control.

  A power company having a transmission and distribution network first reduces the power generation capacity of its own power generation facility if the power supply is exceeded. If the excess of the power supply can not be resolved even by this, the output control is performed. In areas where there are many renewable energy generation facilities connected to the grid, areas where there are few consumers, or areas where the capacity of the grid is small, the frequency of power control activation is high.

  The power transmission and distribution company server 9 predicts the power supply and demand of the grid 3 based on the weather forecast, the load prediction and the like, and determines whether or not the output control is necessary. When power control is required, the power transmission and distribution company server 9 determines the power control schedule and the upper limit value of the output power. The schedule is specified, for example, in units of 30 minutes. The upper limit value of the output power is defined, for example, as 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 company server 9 via the Internet 8. The output control command includes the upper limit value of the output power for each time zone. The content of the output control is determined in principle on the previous day. The content of the output control is appropriately changed according to the change of the weather condition and the load fluctuation 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 the information supplied from the control unit 21 on the screen. The operation unit 26 includes a touch panel and / or a physical body, converts a physical operation by the operator into an electrical operation signal, and outputs the signal to the control unit 21.

  The control unit 21 can be realized by cooperation of hardware resources and software resources or only hardware resources. A microcomputer, a ROM, a RAM, and other LSIs can be used as hardware resources. As software resources, programs such as firmware can be used. The storage unit 22 is configured of a non-volatile memory.

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

  In the first display area 251, the operating state, the mode, the device connection state icon, and the time of the power conversion device 10 are displayed. The operation state of the power conversion device 10 includes “interconnected operation”, “interconnected stop”, and “interconnected standby”. “Interconnected operation” is a state in which the system 3 is operated in conjunction with the system 3. The “in grid stop state” is a state in which all of the solar power generation device 1, the power storage device 2, and the system power supply are stopped. The stop includes a manual stop and a stop due to abnormal detection. The stop due to the abnormality detection also includes a communication abnormality between the power conversion device 10 and the control command device 20. “Interconnected standby” is a state in which the solar power generation device 1, the storage device 2, and the system power supply are all in standby.

  The modes include "economic priority", "environment priority", "storage priority", "external control", and "output control". "Economy priority" is a mode of operation according to the set charge and discharge time. This mode is selected in peak shift operation, and can be charged at night when the electricity bill is inexpensive and discharged at a time zone where the electricity bill is high. The charging time zone and the discharging time zone can be set by the user. In addition, during the period which sells the electric power generation of the solar power generation device 1, it can not discharge from a storage battery. The "environmental priority" is a mode in which the surplus of the power generated by the solar power generation device 1 is charged in the daytime, and the electricity charged in the evening or the night is used. This is a mode that can reduce the amount of electricity purchased from the power company. "Storage priority" is a mode in which charging is prioritized so that the storage device 2 is always fully charged. After charging is complete, it stands by in preparation for a power failure.

  “External control” is a mode in which 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 the output control command from the power transmission and distribution company server 9. When the connection of the 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 solar power generation device 1, the icon of the solar panel, and the amount of power generation [kW] are displayed. The operating state of the solar power generation device 1 includes “during generation”, “stopped”, and “standby”. In “in power generation”, the solar power generation device 1 is generating power. "Stopped" is a state in which power generation is stopped regardless of the presence of solar radiation. "Stopped" also includes the time when data is not acquired or when the communication between the power conversion device 10 and the control command device 20 is abnormal. The "standby" is a state where there is no solar radiation and no power generation, but it is a state where power generation is possible whenever there is solar radiation.

  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”, “stopped”, “standby”, and “not connected”. "Charging" is a state in which the power from the solar power generation device 1 and / or the grid 3 is stored. "During discharging" is a state in which the stored power is being output. "Stopped" is a state in which charge and discharge are stopped. When the connection of the storage device 2 is invalid, "during stop" is always displayed. "Stopped" also includes the time when data is not acquired or when the communication between the power conversion device 10 and the control command device 20 is abnormal. The "standby" is a state in which charging and discharging are not performed, but charging and discharging can be performed at any time as needed. "Not connected" is a state in which the power storage device 2 is not connected.

  The fourth display area 254 displays the input / output state of the system power supply. There are "in input", "output", "stopped" and "standby" in the input / output state of the system power supply. “During input” is a state in which the power storage system 2 is charged with the power from the grid 3. During “output”, the generated power of the solar power generation device 1 and / or the discharged power from the storage device 2 are output to the distribution board 4 to supply power to the grid 3 (sale of electricity) and / or the load 5 It is in the state of "Stopped" is a state in which input / output is stopped. "Stopped" also includes the time when data is not acquired or when the communication between the power conversion device 10 and the control command device 20 is abnormal. In the "standby" state, no input / output is generated, but input / output can be performed at any time according to the power generation state of the solar power generation device 1, charge / discharge set time, and use state of the load 5.

  The operation unit 26a illustrated in FIG. 2 includes an enter 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 25 a (top screen) shown in FIG. 2, the screen changes to a menu screen.

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

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

  FIGS. 4A to 4C are diagrams showing an example of the operation mode setting screen 25c, the date and time setting screen 25d, and the area setting screen 25e. In the menu screen 25b shown in FIG. 3, when the determination key 261 is pressed in a state where “operation mode setting” is selected, the screen changes to the operation mode setting screen 25c shown in FIG. 4 (a). The user selects a desired mode from "economic priority", "environment priority" and "storage priority" displayed in the operation mode setting screen 25c.

  In the menu screen 25b shown in FIG. 3, when the "Determination of date" is selected, when the determination key 261 is pressed, the screen transitions to the date and time setting screen 25d shown in FIG. 4A. The worker of the contractor or the user sets the current date and time from this screen.

  In the menu screen 25b shown in FIG. 3, when the determination key 261 is pressed in a state where "area setting" is selected, the screen changes to the area setting screen 25e shown in FIG. 4C. Japan's transmission and distribution network is locally monopolized by 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 transmission / distribution provider server 9 operated and managed by any of the ten power companies. The worker or the user of the contractor selects which area of 10 power companies the area in which the wound storage collaboration system is installed belongs to. In addition, the specification which inputs / selects the attribute information regarding area, such as a district division, a prefecture, a municipality, may be sufficient. In that case, the control unit 21 specifies the power company of the jurisdiction based on the input / selected attribute information.

  Although it is possible to change the setting contents of the setting items described above at any time in principle, there are times when it should be prohibited to change the setting contents. For example, in a period in which output control is effective, change of setting contents of “date and time setting” and “area setting” is prohibited. As described above, the transmission and distribution network is divided into areas, and the output control command needs to be acquired from the transmission and distribution business operator server 9 that has jurisdiction over the transmission and distribution network in the area where the wound storage collaboration system is installed. The output control command is defined by the schedule and the upper limit value of the output power. Moreover, the content of the output control command may be changed at an arbitrary timing on the day due to a change in climate or the like.

  Therefore, if the user freely allows the user to change the "date and time setting" while the output control is valid, the user may violate the laws and regulations related to the output control without intention. For example, when the time is shifted, there is a possibility that the power exceeding the upper limit value may be output to the grid 3.

  Further, when the content of the output control command is changed, the control commanding device 20 needs to access the power transmission and distribution company server 9 to acquire a new output control command. If the user is allowed to change the “Regional setting” freely while power control is in effect, the power transmission and distribution company server 9 in another area is accessed by the user and another power transmission and distribution is performed. There is a possibility that the network output control command may be obtained.

  The HEMS controller 7 described above has a function to support power saving in the home. 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 situation inside the home. In addition, power consumption by time zone / load can be collected as data, time zones and devices with high power consumption can be identified, and the user can be conscious of saving power by presenting it to the user.

  In addition, the HEMS controller 7 can determine a time zone in which the power storage device 2 discharges based on the power consumption by time zone, and can transmit a discharge command to the control command device 20 in the time zone. In addition, the HEMS controller 7 can transmit a charge command to the control command device 20 in a time zone (for example, 23:00 to 7:00 next day, 22:00 to 8:00 next day) in which the electricity charge is inexpensive.

  The HEMS controller 7 can also send a discharge command to the control command device 20 when the power consumption of the load 5 in the home exceeds a predetermined peak value. Further, the HEMS controller 7 can transmit the release command of the discharge 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 "environmental priority", the external control from the HEMS controller 7 may be set to be rejected.

  Generally, following the external control from the HEMS controller 7 can save electricity costs. Therefore, if the user changes the operation mode during the external control from the HEMS controller 7, there is a possibility that the user will give up enjoying the economic merit by himself without being aware of it.

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

  FIG. 6 is a flowchart showing the operation of the control command device 20 when the change operation of the predetermined setting item is performed. When receiving a command from the external system in a broad sense (Y of S10), the control unit 21 of the control command device 20 prohibits the change of the predetermined setting item (S11). The specific example of the setting item for prohibiting the change has already been described.

  When the effective period of the command received from the external system in a broad sense expires (Y in S12), the control unit 21 cancels the change prohibition of the predetermined setting item (S13). In the case of the output control command, since it is defined by the upper limit value of the output power for each time zone, the end time of the time zone becomes the expiration time of the expiration date. In the case of the charge and discharge command from the HEMS controller 7, usually, the release command is transmitted from the HEMS controller 7 at the timing to stop the charge and discharge. In this case, the time when the release command is received is the expiration time of the expiration date. Further, even if 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 ended if the release command is not sent from the HEMS controller 7. In this case, the time after a predetermined time has elapsed since the reception of 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 unintended operation in the operation of the power conversion device 10. For example, during output control, it is possible to prevent the user from committing a violation of the law without being aware of it. The same applies to workers of the contractor and maintenance workers. In addition, during external control from the HEMS controller 7, it is possible to prevent the user from performing economically disadvantageous operations without being aware of it. Further, by prohibiting the change of the operation mode, the user can recognize that the external control is being performed.

  The present invention has been described above based on the embodiments. The embodiment is an exemplification, and it is understood by those skilled in the art that various modifications can be made to the combination of each component and each processing process, and such modifications are also within the scope of the present invention. .

  In the above-mentioned embodiment, the wound storage cooperation system to which both the solar power generation device 1 and the electrical storage apparatus 2 were connected was assumed. In this respect, when only the solar power generation device 1 is connected, the power conversion device 10 functions as a power conditioner for a solar cell, and the solar power generation device 1 and the power conversion device 10 function as a solar power generation system. On the other hand, when only power storage device 2 is connected, power conversion device 10 functions as a power conditioner for a storage battery, and power storage device 2 and power conversion device 10 function as a power storage system.

  Even in the case of the solar power generation system, the control for prohibiting the change of the "date setting" and the "area setting" is effective while the output control is effective. Further, even in the case of the storage system, control for prohibiting the change of the “operation mode” is effective during the external control from the HEMS controller 7.

  Further, when the external control command from the HEMS controller 7 is a command of a format including a valid time zone, the change of “date and time setting” is prohibited while the external control from the HEMS controller 7 is valid.

  Also, an external control server 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-mentioned embodiment, although the terminal device for exclusive use was assumed as control command device 20, it is also possible to use the smart phone terminal device in which the application program for exclusive use was installed.

  The embodiment may be specified by the following items.

[Item 1]
A first communication unit (23) in communication with the power conversion device (10) for converting the power of the distributed power supply devices (1, 2);
A second communication unit (24) that receives an instruction for the power converter (10) from an external system (7, 9) other than the power converter (10);
A control unit (21) for prohibiting a change of a predetermined setting item of the power conversion device (10) while a command from the external system (7, 9) is valid
Control command system (20).
According to this, in the operation of the power conversion device (10), it is possible to prevent the user from performing an adverse operation without intention.
[Item 2]
The distributed power supply device (1, 2) is a solar power generation device (1),
The command from the external system (9) includes an output control command regarding an output from the solar power generation device (1) to the grid (3),
The control command system (20) according to item 1.
According to this, it is possible to prevent the voltage and frequency of the system (3) from becoming unstable.
[Item 3]
The control unit (21) prohibits date and time change of the power conversion device (10) while the output control is effective.
The control command system (20) according to item 2.
According to this, it is possible to prevent the violation of laws and regulations relating to the output control of the solar power generation apparatus (1).
[Item 4]
The command from the external system (7) includes a charge / discharge command from a Home Energy Management System (HEMS) controller,
The control command system (20) according to item 1.
According to this, the energy efficiency in the home can be improved.
[Item 5]
The control unit (21) prohibits the change of the operation mode of the power conversion device (10) while 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 performing an economically disadvantageous operation without being conscious of it.

  The subject matter of the apparatus, system or method in the present disclosure comprises a computer. The computer executes the program to implement the functions of the apparatus, system, or method in the present disclosure. The computer includes, as a main hardware configuration, a processor that operates according to a program. The processor may be of any type as long as the function can be realized by executing a program. The processor is configured of one or more electronic circuits including a semiconductor integrated circuit (IC) or an LSI (Large Scale Integration). The plurality of electronic circuits may be integrated on one chip or may be provided on a plurality of chips. The plurality of chips may be integrated into one device or may be provided to a plurality of devices. The program is recorded in a non-transitory recording medium such as a computer readable ROM, an optical disc, a hard disk drive and the like. The program may be stored in advance in a recording medium, or may be supplied to the recording medium via a wide area communication network including the Internet and the like.

  1 Photovoltaic generator, 2 power storage device, 3 systems, 4 distribution board, 5 loads, 6 routers, 7 HEMS controller, 8 Internet, 9 power transmission and distribution company server, 10 power converters, 11 1st DC / DC converter , 12 second DC / DC converter, 13 inverter, 14 control circuit, 20 control command device, 21 control unit, 22 storage unit, 23 first communication unit, 24 second communication unit, 25 display unit, 26 operation unit, B1 direct current bus.

Claims (5)

A first communication unit that communicates with a power conversion device that converts power of the distributed power supply device;
A second communication unit that receives an instruction to the power conversion device from an external system other than the power conversion device;
A control unit which prohibits a change of a predetermined setting item of the power conversion device while the command from the external system is valid;
Control command system. The distributed power supply device is a solar power generation device,
The command from the external system includes an output control command regarding an output from the solar power generation device to the grid,
The control command system according to claim 1. The control unit prohibits date and time change of the power conversion device while the output control is effective.
The control command system according to claim 2. The command from the external system includes a charge / discharge command from a Home Energy Management System (HEMS) controller,
The control command system according to claim 1. The control unit prohibits the change of the operation mode of the power conversion device while the charge / discharge command is valid.
The control command system according to claim 4.

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