JP7688540B2 - Power control device, power control system, and panel - Google Patents

Description

This disclosure relates to a power control device, a power control system, and a panel.

Conventionally, a configuration in which a solar cell module is controlled by a microinverter is known (see, for example, Patent Document 1).

JP 2016-171654 A

There is a demand for improved convenience of inverters.

The objective of this disclosure is to provide a power control device, a power control system, and a panel that can improve the convenience of inverters.

A power control device according to an embodiment of the present disclosure includes an inverter that converts power output from a renewable energy power generation device, and a gateway that is connected to the inverter so as to be able to perform power line communication. The inverter is connected to a node located between a power grid and a load that receives power from the power grid. The gateway is connected between the inverter and the node.

The power control system according to one embodiment of the present disclosure includes the power control device and the load.

A panel according to one embodiment of the present disclosure houses a node and a gateway. The node is located between a power grid and a load that receives power from the power grid. The gateway is connected to an inverter that converts power output from a renewable energy power generation device so as to be able to perform power line communication. The gateway is connected between the inverter and the node.

The power control device, power control system, and panel according to one embodiment of the present disclosure improve the convenience of the inverter.

1 is a block diagram showing a schematic configuration example of a power control system according to an embodiment; 1 is a block diagram showing a schematic configuration example of a power control system according to a comparative example; FIG. 2 is a block diagram showing an example of the configuration of loads set in an apartment building. 1 is a block diagram showing a configuration example of a power control device including a control distribution board; FIG. 13 is a block diagram showing a schematic configuration example of a power control system according to another embodiment. FIG. 2 is a diagram illustrating an example of the configuration of a gateway. FIG. 1 is a diagram showing a configuration example in which one renewable energy power generation device is connected to one inverter. FIG. 1 is a diagram showing a configuration example in which a plurality of renewable energy power generation devices are connected to one inverter.

(Configuration example of power control system 1)
1 , a power control system 1 according to one embodiment includes a power control device 10, a load 40, and a renewable energy power generation device 60. The power control system 1 is connected to a power grid 50 that supplies power, and the load 40.

The renewable energy power generation device 60 may include a solar power generation device (hereinafter also referred to as PV). The renewable energy power generation device 60 may also include a device that utilizes other renewable energy, such as a wind power generation device. In this embodiment, the renewable energy power generation device 60 is a PV. The microinverter 12 controls the power output from the PV by, for example, converting the DC power output from the PV into AC power. The microinverter 12 may include an inverter, a converter, or the like. The renewable energy power generation device 60 may be replaced with a storage battery or a fuel cell, or may include a storage battery or a fuel cell. The number of renewable energy power generation devices 60 and microinverters 12 is not limited to one, and may be two or more.

The power control device 10 includes a microinverter 12 and a gateway 14. The microinverter 12 is connected to a renewable energy power generation device 60, and converts the power generated by the renewable energy power generation device 60 to supply it to a load 40 or to flow it back to the power grid 50. When the renewable energy power generation device 60 outputs DC power, the microinverter 12 is configured to convert the DC power of the renewable energy power generation device 60 into AC power that matches the power grid 50. When the renewable energy power generation device 60 outputs AC power, the microinverter 12 is configured to convert the AC power of the renewable energy power generation device 60 into AC power that matches the power grid 50. The microinverter 12 may operate with power from the power grid 50 or may operate with power from the renewable energy power generation device 60.

The gateway 14 is connected to the microinverter 12. The gateway 14 may acquire various information from the microinverter 12, such as information about the operating state of the renewable energy power generation device 60 or information about the operating state of the microinverter 12. The information about the operating state may include, for example, information about the open/close state of the cutoff device. The gateway 14 may be configured to be able to output the information acquired from the microinverter 12 in various forms, such as visual information such as images or characters, or auditory information such as voice. The gateway 14 may operate on power from the power grid 50 or on power from the renewable energy power generation device 60.

The microinverter 12 or gateway 14 may be configured to include at least one processor to provide control and processing power for performing various functions. The processor may execute programs that implement various functions of the microinverter 12 or gateway 14. The processor may be implemented as a single integrated circuit. An integrated circuit is also referred to as an IC (Integrated Circuit). The processor may be implemented as multiple communicatively connected integrated circuits and discrete circuits. The processor may be implemented based on various other known technologies.

The microinverter 12 or the gateway 14 may include a memory unit. The memory unit may include an electromagnetic storage medium such as a magnetic disk, or may include a memory such as a semiconductor memory or a magnetic memory. The memory unit stores various information and programs executed by the microinverter 12 or the gateway 14. The memory unit may be configured as a non-transitory readable medium. The memory unit may function as a work memory for the microinverter 12 or the gateway 14. At least a part of the memory unit may be configured as a separate entity from the microinverter 12 or the gateway 14.

The power control device 10 further includes a master meter 45 connected to the power grid 50, although this is not essential. The power control system 1 is connected to the power grid 50 via the master meter 45. The master meter 45 measures the amount of power that the power control system 1 receives from the power grid 50. The master meter 45 may also measure the amount of power that flows back from the power control system 1 to the power grid 50.

The power control device 10 further includes a coil 30, although this is not essential. The power control device 10 is connected to the load distribution board 20 or the load 40 via the coil 30. The coil 30 is configured to reduce noise flowing in the wiring. The coil 30 is also called a blocking coil.

In the power control system 1, power is supplied from the power grid 50 to the load 40. Power is also supplied to the load 40 from a microinverter 12 that converts the power generated by a renewable energy power generation device 60. The microinverter 12 is connected to a wiring that connects the power grid 50 to the load 40 at a node 71 located between the power grid 50 and the load 40. The gateway 14 is connected to a wiring that connects the microinverter 12 to the node 71 at a node 72 located between the microinverter 12 and the node 71.

The gateway 14 acquires information from the microinverter 12 by power line communication via wiring connecting the gateway 14 and the microinverter 12. That is, the gateway 14 is connected to the microinverter 12 so that power line communication can be performed. Because the gateway 14 can acquire information from the microinverter 12 by power line communication, a dedicated communication line is not required. The absence of a dedicated communication line makes it easier to install the microinverter 12. As a result, the convenience of the microinverter 12 is improved.

In addition, power line communication between the gateway 14 and the microinverter 12 is performed without passing through the wiring connecting the power grid 50 and the load 40.

In the power control system 9 shown in FIG. 2 as a comparative example, the gateway 14 is connected to the load distribution board 20 in parallel with the load 40. The configuration of the comparative example corresponds to a configuration in which the gateway 14 is connected to the load distribution board 20 installed in a house when the gateway 14 is installed in the house. In the comparative example, the gateway 14 is connected to the microinverter 12 through a wiring that connects the power grid 50 and the load 40. In other words, a part of the wiring that connects the gateway 14 and the microinverter 12 is common to the wiring that supplies power to the load 40. In this case, the power line communication between the gateway 14 and the microinverter 12 is easily affected by noise from the load 40.

In the power control system 1 according to this embodiment, the power line communication between the gateway 14 and the microinverter 12 is performed without passing through the wiring connecting the power grid 50 and the load 40, unlike the comparative example. Power line communication that does not pass through the wiring connected to the load 40 is less susceptible to the noise of the load 40. In addition, by providing a coil 30 that reduces the noise of the load 40 between the node 71 to which the microinverter 12 and the gateway 14 are connected and the load 40, the effect of the noise of the load 40 on the power line communication can be reduced.

The wiring from the transaction meter 45 to the node 71 may be shorter than the wiring from the node 71 to the load 40. In this way, the distance from the wiring connecting the microinverter 12 and the gateway 14 to the load 40 is longer. As a result, the effect of noise on the load 40 can be further reduced.

(Example of configuration of apartment building 4 equipped with load 40)
The load 40 may be installed in a complex consumer facility including multiple consumer facilities. As shown in FIG. 3 , the complex consumer facility may be an apartment building 4. When the complex consumer facility is an apartment building 4, the complex consumer facility may include, as consumer facilities, each of the multiple dwelling units 2 of the apartment building 4, or may include a common area 3 of the apartment building 4. The complex consumer facility may be a commercial facility including a store as a consumer facility. An example of an embodiment will be described below assuming that the complex consumer facility is an apartment building 4.

The apartment complex 4 may be in various forms, such as a condominium, an apartment, or a maisonette. The apartment complex 4 may be managed by a management entity. The management entity of the apartment complex 4 may be the owner of the apartment complex 4 or a business operator that manages the apartment complex 4. The management entity of the apartment complex 4 may enter into individual occupancy contracts with the residents of each dwelling unit 2.

In the apartment building 4, the load 40 includes a shared load 41 installed in the common area 3 and a dwelling load 42 installed in the dwelling unit 2. In the apartment building 4, a shared meter 47 is further installed, although this is not essential. The shared meter 47 measures the amount of electricity supplied to the shared load 41 installed in the common area 3. In the apartment building 4, a dwelling unit meter 46 is further installed. The dwelling unit meter 46 measures the amount of electricity supplied to the dwelling unit load 42 installed in the dwelling unit 2.

The shared load 41 is a load 40 provided in the common area 3 of the apartment building 4. The common area 3 may be, for example, a corridor or stairs of the apartment building 4. The shared load 41 may include equipment provided in the common area 3, such as lighting fixtures such as outdoor lights, septic tank blower power supplies, emergency equipment such as fire alarms, and other equipment such as air conditioning equipment. The dwelling unit load 42 is a load 40 provided in each dwelling unit 2 of the apartment building 4, and may be, for example, electrical equipment such as lighting fixtures, refrigerators, televisions, or air conditioners used in each dwelling unit 2. The apartment building 4 includes multiple dwelling units 2. Each dwelling unit 2 is provided with a dwelling unit load 42. In other words, the apartment building 4 is provided with multiple dwelling unit loads 42.

In an apartment building 4, the PV as the renewable energy power generation device 60 may be installed separately, for example, on the roof of the apartment building 4, on the roof of the parking lot of the apartment building 4, or within the grounds of the apartment building 4.

(Example of configuration including a control distribution board 80)
As shown in FIG. 4 , the power control device 10 may include a control distribution board 80. The control distribution board 80 accommodates the gateway 14, the coil 30, the node 71, and the node 72. The control distribution board 80 includes a terminal 81, a terminal 82, and a terminal 83. The control distribution board 80 is connected to the load 40 or the load distribution board 20 at the terminal 81. That is, the terminal 81 is configured to be connectable to the load 40. The control distribution board 80 is connected to the microinverter 12 at the terminal 82. That is, the terminal 82 is configured to be connectable to the microinverter 12. The control distribution board 80 is connected to the power grid 50 or the master meter 45 at the terminal 83. That is, the terminal 83 is configured to be connectable to the power grid 50. The master meter 45 may be installed between the terminal 83 and the node 71. The master meter 45 may be installed in the control distribution board 80. The control distribution board 80 may also be simply referred to as a board. The control distribution board 80 may be configured as an inlet board, a distribution board, or the like. By configuring a circuit including wiring that branches off from the wiring that supplies power from the power grid 50 to the load 40 and connects to the microinverter 12 as a board, the power control device 10 according to the present embodiment can be easily introduced into an existing facility, for example, an existing apartment building 4. The control distribution board 80 may also be installed on the outer wall of the apartment building 4. In this way, the power control device 10 according to the present embodiment can be easily introduced into an existing apartment building 4.

In the control distribution board 80, the terminal 81 connected to the load 40 is located closer to the load 40 than the coil 30 is to the node 71. This makes it less likely that noise from the load 40 will affect the power line communication carried out through the wiring connected to the node 71.

(Example of a configuration in which the power grid 50 is branched to a plurality of loads 40)
5, the power control system 1 may be configured to branch and supply power from a power grid 50 to a load 40A and a load 40B. The power control system 1 has a branch point 52. It can also be said that the power from the power grid 50 is branched at the branch point 52 and supplied to two consumer facilities or a complex consumer facility. In this embodiment, the wiring branched at the branch point 52 is connected to a first facility and a second facility.

The first facility includes a control distribution board 80A with a gateway 14, a renewable energy power generation device 60A, a microinverter 12A, a master meter 45A, and a load 40A. The control distribution board 80A is also referred to as the first board. In addition to the gateway 14, the control distribution board 80A includes a coil 30A, a node 71A, a node 72A, a terminal 81A, a terminal 82A, and a terminal 83A. The control distribution board 80A is connected to the load 40A at the terminal 81A. The control distribution board 80A is connected to the microinverter 12A at the terminal 82A. The control distribution board 80A is connected to the master meter 45A or the branch point 52 at the terminal 83A.

The second facility includes a control distribution board 80B without a gateway 14, a renewable energy power generation device 60B, a microinverter 12B, a master meter 45B, and a load 40B. The control distribution board 80B is also referred to as a second board. The control distribution board 80B includes a coil 30B, a node 71B, a node 72B, a terminal 81B, a terminal 82B, and a terminal 83B. The control distribution board 80B is connected to the load 40B at the terminal 81B. The control distribution board 80B is connected to the microinverter 12B at the terminal 82B. The control distribution board 80B is connected to the master meter 45B or the branch point 52 at the terminal 83B.

In the configuration of FIG. 5, the power control device 10 includes a microinverter 12A provided in a first facility, a microinverter 12B provided in a second facility, and a gateway 14. The microinverter 12A provided in the first facility is also referred to as a first inverter. The microinverter 12B provided in the second facility is also referred to as a second inverter. The gateway 14 performs power line communication with the microinverter 12 provided in the first facility through wiring within the first facility. That is, the gateway 14 is communicatively connected to the microinverter 12A without passing through the branch point 52. The gateway 14 also performs power line communication with the microinverter 12B provided in the second facility through wiring including the branch point 52. That is, the gateway 14 is communicatively connected to the microinverter 12B through the branch point 52. In this way, one gateway 14 can acquire information from the microinverters 12 provided in each of the multiple consumer facilities connected via the branch point 52.

The power control system 1 also includes a coil 54 between the power grid 50 and the branch point 52, although this is not essential. The coil 54 can reduce the effect of noise from the power grid 50 on the power line communication. Also, by connecting the coil 30A closer to the load 40A than the node 71A and connecting the coil 30B closer to the load 40B than the node 71B, the effect of noise from the loads 40A and 40B on the power line communication can be reduced.

The control distribution board 80A further includes a breaker 84A and a breaker 85A, although these are not essential. The breaker 84A is connected between the microinverter 12A and the node 72A, and when it is on, it connects the microinverter 12A to the load 40A or the power grid 50, and when it is off, it disconnects the microinverter 12A from the load 40A or the power grid 50. The breaker 85A is connected between the gateway 14 and the node 72A, and when it is on, it enables the gateway 14 to perform power line communication with the microinverter 12A or the microinverter 12B, and when it is off, it disconnects the gateway 14 from the microinverter 12A or the microinverter 12B. If the breakers 84A and 85A were not present and a breaker was present between the node 72A and the node 71A, when the microinverter 12A fails, not only the microinverter 12A but also the gateway 14 would be stopped by turning off the breaker. On the other hand, because breakers 84A and 85A are connected, even if microinverter 12A fails, if only breaker 84A is turned off, gateway 14 can continue power line communication with microinverter 12B in the second facility.

The control distribution board 80B further includes a breaker 84B, although this is not essential. The breaker 84B is connected between the microinverter 12B and the node 72B, and when in the ON state, the breaker 84B connects the microinverter 12B to the load 40B or the power grid 50, and when in the OFF state, the breaker 84B disconnects the microinverter 12B from the load 40B or the power grid 50.

Although not essential, the control distribution board 80B includes an empty area 86 in which the gateway 14 can be installed even if the gateway 14 is not provided. The control distribution board 80B may include a terminal configured to be connectable to the node 72B or the microinverter 12B when the gateway 14 is installed in the empty area 86. The control distribution board 80B also includes a breaker 85B, although not essential. When the gateway 14 is installed in the empty area 86, the breaker 85B is connected between the gateway 14 and the node 71B. In this case, when the breaker 85B is turned on, the gateway 14 can perform power line communication with the microinverter 12A or the microinverter 12B, and when the breaker 85B is turned off, the gateway 14 is disconnected from the microinverter 12A or the microinverter 12B. When the gateway 14 is additionally installed in the empty area 86, by installing multiple gateways 14, the other gateways 14 can be continuously used as a replacement when one gateway 14 breaks down.

The power control system 1 may include a master meter 45 between the coil 54 and the branch point 52. By connecting the first facility and the second facility via the branch point 52, the power of the microinverter 12A can be supplied to the load 40B. Also, the power of the microinverter 12B can be supplied to the load 40A. In this way, local production and consumption or self-consumption of the power generated by the renewable energy power generation device 60 is promoted. Local production and consumption means that the power generated by the renewable energy power generation device 60A flows once to the power grid 50 side of the master meter 45, then immediately returns and is consumed by the load 40B. Self-consumption means that the power generated by the renewable energy power generation device 60A is consumed by the load 40B without flowing to the power grid 50 side of the master meter 45.

In the power control system 1, when a master meter 45 is provided between the coil 54 and the branch point 52, a collective power reception is realized in the apartment building 4 having the loads 40A and 40B. The master meter 45A may be provided between the terminal 83A and the node 71A, or between the node 71A and the coil 30A. The master meter 45B may be provided between the terminal 83B and the node 71B, or between the node 71B and the coil 30B. The control distribution board 80A and the control distribution board 80B may be a single control distribution board 80.

The management entity of the apartment complex 4 concludes a lump-sum power receiving contract with an electric power supplier that supplies power from the power grid 50. The electric power supplier supplies power from the power grid 50 to the apartment complex 4 based on the lump-sum power receiving contract. The load 40 included in the apartment complex 4 consumes the lump-sum power received. The master meter 45 measures the amount of power supplied from the power grid 50 to the apartment complex 4. The master meter 45 is a certified meter. The electric power supplier manages the master meter 45 and obtains the measurement results from the master meter 45. The electric power supplier calculates an electricity fee corresponding to the total power consumption of the apartment complex 4 based on the measurement results of the master meter 45. The electric power supplier bills the management entity of the apartment complex 4 for the electricity fee calculated based on the measurement results of the master meter 45. The management entity of the apartment complex 4 may bill the residents of each dwelling unit 2 for electricity based on the measurement results of the power consumption of each dwelling unit load 42 by the dwelling unit meter 46, or may bill the residents of each dwelling unit 2 for electricity based on other standards.

When the management entity of the apartment building 4 enters into a lump-sum power receiving contract, either a high-voltage lump-sum power receiving contract or a low-voltage lump-sum power receiving contract is selected. A high-voltage lump-sum power receiving contract is a contract for receiving electricity collectively with an electrical capacity equal to or greater than a predetermined value. A low-voltage lump-sum power receiving contract is a contract for receiving electricity collectively with an electrical capacity less than a predetermined value. The predetermined value is determined appropriately by the electric power company. The predetermined value may be, for example, 50 kW. The management entity of the apartment building 4 may enter into either a high-voltage lump-sum power receiving contract or a low-voltage lump-sum power receiving contract based on the number of dwelling units 2 of the apartment building 4. Regardless of whether a high-voltage lump-sum power receiving contract or a low-voltage lump-sum power receiving contract is entered into, peak power consumption can be cut by leveling out the power consumption of the entire apartment building 4. As a result, the management entity of the apartment building 4 can enjoy the benefit of a reduction in the unit price of electricity due to peak power consumption cuts. By the management entity of the apartment building 4 entering into a lump-sum power receiving contract, the residents of each dwelling unit 2 do not have to go through the trouble of entering into a power receiving contract. When the apartment building 4 is equipped with a renewable energy power generation device 60, the loads 40 of the apartment building 4 as a whole receive power from the renewable energy power generation device 60. By leveling out the power consumption, the loads 40 of the apartment building 4 can constantly consume power from the renewable energy power generation device 60. As a result, local production and consumption or self-consumption can be promoted.

As shown in FIG. 6, the gateway 14 may include a display unit 141. The display unit 141 displays information acquired by the gateway 14 from the microinverter 12. The display unit 141 includes a display device that outputs visual information such as an image, text, or a figure. The display device may include, for example, an LCD (Liquid Crystal Display), an organic EL (Electro-Luminescence) display, an inorganic EL display, or a PDP (Plasma Display Panel). The display device is not limited to these displays and may include displays of various other types. The display device may include a light-emitting device such as an LED (Light Emission Diode) or an LD (Laser Diode). The display device may include various other devices.

The microinverter 12 may be replaced with an inverter that includes the microinverter 12. The inverter may include various inverters in addition to the microinverter 12.

The microinverters 12 may be attached to each renewable energy power generation device 60 (including, for example, solar panels, etc.) one by one, as illustrated in FIG. 7. In other words, one microinverter 12 may be connected to one renewable energy power generation device 60. Also, the microinverters 12 may be connected to multiple renewable energy power generation devices 60 (including, for example, solar panels, etc.), as illustrated in FIG. 8.

As a comparative example, a system in which a single inverter is connected to a configuration in which multiple renewable energy power generation devices 60 (including, for example, solar panels, etc.) are connected in series and controlled centrally is considered. In the comparative example, if a malfunction occurs in at least one of the renewable energy power generation devices 60, any one of the wiring connecting the renewable energy power generation devices 60, or any one of the inverters, the influence of the malfunction extends to the entire system. On the other hand, according to the power control system 1 of this embodiment, by controlling in a distributed manner using multiple inverters, even if a malfunction occurs in any one of the renewable energy power generation devices 60, any one of the wiring, or any one of the inverters, the influence of the malfunction can be prevented from extending to other inverters or other renewable energy power generation devices 60. As a result, the range of the influence of the malfunction can be limited to a part of the power control system 1.

In addition, if the output scale of the renewable energy power generation device 60 is smaller than the output of the inverter that operates to be centrally managed in the system according to the comparative example, the inverter specifications will be excessive. By using an inverter having specifications based on the output of the renewable energy power generation device 60, the difference between the specifications required for the inverter and the actual inverter specifications can be reduced. However, when the inverter communicates with the gateway 14 over a power line, it is susceptible to noise from the load 40. Therefore, the inverter needs to be configured so as to be less susceptible to noise from the load 40 during power line communication.

The figures illustrating the embodiments of the present disclosure are schematic. The dimensional ratios and other details in the drawings do not necessarily correspond to the actual ones.

Although the embodiments of the present disclosure have been described based on the drawings and examples, it should be noted that a person skilled in the art would be able to make various modifications or alterations based on the present disclosure. Therefore, it should be noted that these modifications or alterations are included in the scope of the present disclosure. For example, the functions included in each component can be rearranged so as not to cause logical inconsistencies, and multiple components can be combined into one or divided.

In this disclosure, descriptions such as "first" and "second" are identifiers for distinguishing the configuration. Configurations distinguished by descriptions such as "first" and "second" in this disclosure can exchange numbers in the configuration. For example, the first equipment can exchange identifiers "first" and "second" with the second equipment. The exchange of identifiers is performed simultaneously. The configurations remain distinguished even after the exchange of identifiers. Identifiers may be deleted. A configuration from which an identifier has been deleted is distinguished by a code. Descriptions of identifiers such as "first" and "second" in this disclosure should not be used solely to interpret the order of the configuration or to justify the existence of an identifier with a smaller number.

1 Power control system 4 Apartment building (2: dwelling unit, 3: common area)
10 Power control device 12 (12A, 12B) Micro inverter 14 Gateway (141: display unit)
20 Load distribution board 30 (30A, 30B) Coil 40 (40A, 40B) Load (41: common load, 42: dwelling load)
45 (45A, 45B) Master meter 46 Residential meter 47 Shared meter 50 Power grid 52 Branch point 54 Coil 60 (60A, 60B) Renewable energy power generation device 71 (71A, 71B), 72 (72A, 72B) Node 80 (80A, 80B) Control distribution board 81 (81A, 81B), 82 (82A, 82B), 83 (83A, 83B) Terminal 84A, 84B, 85A, 85B Breaker 86 Free space

Claims (17)

an inverter that converts power output from a renewable energy power generation device;
A gateway is connected to the inverter so as to be able to perform power line communication,
the inverter is connected to a load distribution board located between a load receiving power from a power grid and the power grid, and a node located between the power grid ,
The gateway is connected between the inverter and the node , and acquires information regarding an operating state of the renewable energy power generation device or the inverter from the inverter .
Power control device. The power control device of claim 1, further comprising a blocking coil connected between the load and the node. a meter connected between the power grid and the node;
3. The power control device according to claim 1, wherein a wiring from the master meter to the node is shorter than a wiring from the node to the load. The power control device according to any one of claims 1 to 3, further comprising a panel that houses the node and the gateway. The power control device according to claim 4, wherein the board contains a blocking coil connected between the load and the node, and includes a terminal configured to be connectable to the load via the blocking coil. The power control device according to claim 4 or 5, wherein when the renewable energy power generation device is installed in a dwelling, the panel is configured to be installed on an exterior wall of the dwelling. The power control device according to any one of claims 1 to 6, wherein when the renewable energy power generation device is installed in a dwelling, the node is configured to be installed on an exterior wall of the dwelling. The power control device according to any one of claims 1 to 7, wherein the gateway is provided with a display unit that displays information acquired from the inverter. The power control device according to any one of claims 1 to 8, comprising a first inverter and a second inverter connected to the power grid via a branch point as the inverter. The power control device according to claim 9, wherein the gateway is communicatively connected to the first inverter without passing through the branch point, and communicatively connected to the second inverter through the branch point. The power control device according to claim 9 or 10, further comprising a blocking coil connected between the branch point and the power grid. The first inverter, the second inverter, and the gateway are each connected to a wiring via a breaker ;
The power control device according to any one of claims 9 to 11 , wherein, when the first inverter fails, a breaker of the first inverter is turned off while a breaker of the gateway remains on . The first inverter supplies power to a load connected to the second inverter via the branch point;
The power control device according to claim 9 , wherein the second inverter supplies power to a load connected to the first inverter via the branch point. Further comprising a first board that houses a node connected to the first inverter and the gateway, and a second board that houses a node connected to the second inverter,
The power control device according to claim 9 , wherein the second board includes a terminal configured to be connectable to the gateway. A power control system comprising the power control device according to any one of claims 1 to 14 and the load. A board housing a load distribution board located between a load receiving power from a power grid and the power grid , a node located between the power grid , and a gateway connected to an inverter that converts power output from a renewable energy power generation device so as to be able to perform power line communication, and connected between the inverter and the node, for obtaining information from the inverter regarding the operating state of the renewable energy power generation device or the inverter . The panel of claim 16, further comprising a blocking coil connected between the load and the node, and a terminal configured to be connectable to the load via the blocking coil.

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