JP2009011150A - Device and system for linking system, and power control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a system for linking a system capable of starting a linkage between a distribution system (a bank) and a power supply device while preventing the imposition of an excess load to a transmission line when the power transmission of an AC power is restored, and to provide a power control system. <P>SOLUTION: The device 100 for linking the system is connected to the bank receiving the transmission of the AC power and the power supply devices of consumers 30. The device 100 has a detecting section 101 detecting the start of the transmission of AC power on the basis of the state of the AC power, a receiving section 102 receiving a linkage-start instruction indicating the start of linkages between the bank and the power supply devices and a linkage control section 105 controlling the linkage between the bank and the power supply devices and parallel-off between the bank and the power supply devices. The linkage control section 105 starts the linkage between the bank and the power supply devices when the linkage-start instruction is received in the state detecting the start of the transmission of AC power. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a grid interconnection device, a grid interconnection system, and a power control system connected to a power distribution system through which AC power is transmitted and a power supply device provided at a consumer.

  2. Description of the Related Art Conventionally, there are an increasing number of cases where a power generation device (for example, a solar power generation system or the like) is provided in each consumer (for example, a house or factory) that receives supply of AC power from a substation.

  Specifically, a plurality of power distribution systems (hereinafter referred to as banks) are provided under the substation, and a customer having a power generation device is provided in each bank. Here, the electric power generated by the power generation device is not only consumed by the power consuming device (for example, home appliances) provided in the own consumer, but also transmitted to another consumer (that is, the bank side). There is also. In this way, a system that connects the power generation device and the bank and supplies power is referred to as a grid interconnection system.

  In the grid interconnection system, when transmission of AC power from a substation is stopped, for example, when a power failure occurs, a disconnection process for separating the power generation device and the bank is performed. On the other hand, when transmission of AC power from a substation is started, for example, when a power failure is restored, an interconnection process for connecting the power generation device and the bank is performed.

  Here, as a method for detecting AC power transmission stoppage (or power transmission recovery), a method of monitoring the state of AC power transmitted via a bank on the customer side is known. Specifically, the customer side monitors the change in voltage, the change in voltage phase, the change in frequency, etc. for AC power transmitted through the bank, and stops AC power transmission (or power transmission). Recovery).

  In addition, a technique has been proposed in which an operator such as an electric power company transmits a signal instructing to stop a power generation device provided to a consumer to the consumer by wireless communication (for example, Patent Document 1).

Specifically, the operator transmits, by wireless communication, area information that specifies an area where the power generation apparatus should be instructed to stop, and whether the consumer is included in the area specified by the area information. Accordingly, it is determined whether or not to stop the power generation device.
Japanese Patent No. 3240215 (Claim 1, [0019], FIG. 1, etc.)

  By the way, the amount of power transmitted to the bank side out of the power generated by the power generation device is generally in accordance with a standard predetermined by the guidelines in order to prevent an excessive load from being imposed on the transmission line. Be controlled.

  Here, after AC power transmission is stopped, when AC power transmission is restored, each consumer simultaneously starts interconnection of power generation devices provided to the customer. When a large number of power generators start interconnection at the same time, the control according to the criteria determined in advance by the guidelines cannot follow the bank voltage rise, and the amount of power transmitted to the bank is temporarily excessive. There is a possibility that the amount will be.

  In other words, when AC power transmission is restored, there is a possibility that an excessive load is imposed on the transmission line by the power transmitted by each consumer to the bank side.

  Therefore, the present invention has been made to solve the above-described problem, and when the transmission of AC power is restored, the distribution system (bank) is suppressed while preventing an excessive load from being imposed on the transmission line. It is an object of the present invention to provide a grid interconnection device, a grid interconnection system, and a power control system that can start interconnection between a power generation device and a power supply device.

  In one aspect of the present invention, a grid interconnection connected to a power distribution device (bank) through which AC power is transmitted and a power supply device (power generation device 32 or power storage device 34) provided in a consumer (customer 30). The device (system interconnection device 100) includes a detection unit (detection unit 101) that detects that the transmission of the AC power is started based on the state of the AC power, the distribution system, and the power supply device. A receiving unit (receiving unit 102) that receives an interconnection start instruction for instructing the start of interconnection from a predetermined transmission path, interconnection between the distribution system and the power supply device, and a solution between the distribution system and the power supply device A control unit (interconnection control unit 105) that controls the train, and the control unit receives the connection start instruction in a state where the detection unit detects that the transmission of the AC power has started. In the case of interconnection between the power distribution system and the power supply device Start.

  Here, the AC power state includes, for example, voltage, phase difference between voltage and current, frequency, change in voltage, change in voltage phase, change in frequency, and the like. The detection unit, for example, depending on whether the voltage, the phase difference between the voltage and current, the frequency, the voltage change, the voltage phase change, the frequency change, etc. are within the allowable range of commercial power, Detect the start of power transmission.

  According to such a feature, when the control unit receives an interconnection start instruction in a state where it is detected that transmission of AC power is started through the distribution system, the control unit performs interconnection between the distribution system and the power supply device. Start. Therefore, it is suppressed that a consumer side arbitrarily starts connection of a power supply device and an excessive load is imposed on the transmission line.

  Therefore, when AC power transmission is restored, the connection between the power distribution system (bank) and the power supply device can be started while suppressing an excessive load on the transmission line.

  In the above-described feature of the present invention, the interconnection start instruction includes information for specifying the power supply device that starts the interconnection with the distribution system, and the control unit is configured to specify the power supply specified by the interconnection start instruction. It is preferable to start the connection of the devices.

  In the above-described feature of the present invention, it is preferable that the control unit prepares connection of the power supply device other than the power supply device specified by the connection start instruction.

  In the above-described feature of the present invention, it is preferable that the interconnection start instruction includes information for specifying a type of the power supply device.

  In the above-described feature of the present invention, the interconnection start instruction includes area information for specifying an area for starting interconnection between the power distribution system and the power supply device, and the control unit is specified by the area information. When the area is its own area, it is preferable to start the connection of the power supply devices.

  In the above-described feature of the present invention, the control unit may prepare for connection between the power distribution system and the power supply device when the area specified by the area information is an area adjacent to the own area. preferable.

  In the above-described feature of the present invention, the power supply device includes a plurality of power supply devices, and the order of starting the interconnection of the plurality of power supply devices depends on the load state of the power consuming device provided in the consumer and the plurality of power supply devices. It is preferable to be determined based on the power supply amount of the power supply apparatus. The power supply amount is the amount of power that can be supplied by the power supply device. The power supply amount is determined according to the power generation amount of the power generation device, the power storage amount of the power storage device, and the like.

  In the above-described feature of the present invention, the interconnection start instruction includes power supply amount information that specifies a power supply amount of the power supply device that starts connection with the distribution system, and the control unit is specified by the region information. It is preferable to start the connection between the power distribution system and the power supply device based on the power supply amount information.

  In one aspect of the present invention, in a grid interconnection system including a grid interconnection device connected to a distribution system through which AC power is transmitted, and a power supply device connected to the grid interconnection device, the grid interconnection The apparatus detects, based on the state of the AC power, a detection unit that detects that transmission of the AC power has started, and a grid start instruction that instructs the start of the grid system and the power supply apparatus. A receiving unit that receives from a predetermined transmission path; and a control unit that controls interconnection between the power distribution system and the power supply device and disconnection of the power distribution system and the power supply device, and the control unit includes the AC In the state where the detection unit detects that power transmission has started, when the interconnection start instruction is received, the interconnection between the power distribution system and the power supply device is started.

  In one aspect of the present invention, in a power control system, a grid interconnection device connected to a distribution system to which AC power is transmitted, a power supply device connected to the grid interconnection device, the distribution system, and the power source A transmission device that transmits an interconnection start instruction for instructing the start of interconnection with the device to the grid interconnection device via a predetermined transmission path, and the grid interconnection device is based on the state of the AC power A detection unit that detects that transmission of the AC power is started, a reception unit that receives the interconnection start instruction from the transmission device via the predetermined transmission path, the distribution system, and the power source A state where the detection unit detects that the transmission of the AC power is started, and includes a control unit that controls interconnection with a device and disconnection between the power distribution system and the power supply device. In the case of receiving the interconnection start instruction Starts grid interconnection between the power supply device and the power distribution system.

  According to the present invention, when AC power transmission is restored, it is possible to start the interconnection between the power distribution system (bank) and the power supply device while suppressing an excessive load on the transmission line. It is possible to provide a grid interconnection device, a grid interconnection system, and a power control system.

  Below, the grid connection system which concerns on embodiment of this invention is demonstrated, referring drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.

  However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

[First Embodiment]
(Configuration of power transmission system)
Hereinafter, the configuration of the power transmission system according to the first embodiment will be described with reference to the drawings. FIG. 1 is a schematic diagram illustrating a configuration of a power transmission system according to the first embodiment.

  As shown in FIG. 1, the power transmission system includes a high-voltage power supply source 10, a substation 20, and a plurality of consumers 30.

  The high voltage power supply source 10 transmits high voltage power to the substation 20 via the high voltage transmission line 40. The high-voltage power supply source 10 is, for example, a power plant.

  The substation 20 steps down the high-voltage power transmitted via the high-voltage power transmission line 40 and transmits AC power to each consumer 30 via the power transmission line 50 (power transmission line 50A to power transmission line 50C). The details of the substation 20 will be described later (see FIG. 2).

  Each consumer 30 has a power generation device such as a solar power generation device, a fuel cell power generation device, or a wind power generation device as a power supply device. Each consumer 30 has a power consuming device such as a home appliance that operates while consuming power. Details of the customer 30 will be described later (see FIGS. 3 and 4).

  Here, each customer 30 is classified into a plurality of districts according to a geographical area, an electric power company, and the like. For example, the customer 30A to the customer 30C are connected to the power transmission line 50A and are classified into the district A. Similarly, the customer 30P to the customer 30R are connected to the power transmission line 50B and are classified into the district B. The customer 30X to the customer 30Z are connected to the power transmission line 50C and are classified into the district C.

  The substation 20 described above controls transmission of AC power for each transmission line 50. That is, the substation 20 manages each customer 30 for every district. Below, the unit which the substation 20 manages each consumer 30 is called a power distribution system (bank).

  Specifically, the substation 20 manages the customer 30 provided in the district A as the bank A. Similarly, the substation 20 manages the customer 30 provided in the district B as the bank B, and manages the customer 30 provided in the district C as the bank C.

(Configuration of substation)
Hereinafter, the configuration of the substation according to the first embodiment will be described with reference to the drawings. FIG. 2 is a block diagram illustrating a configuration of the substation 20 according to the first embodiment.

  As shown in FIG. 2, the substation 20 includes a power transmission control unit 21 and a transmission unit 22.

  The power transmission control unit 21 includes a plurality of relays 21A to 21C. Each relay switches whether or not AC power generated by stepping down high-voltage power with a transformer (not shown) is transmitted to each bank. Specifically, the relay 21 </ b> A switches whether to transmit AC power to each customer 30 provided in the district A. Similarly, the relay 21B switches whether to transmit AC power to each customer 30 provided in the district B. Does the relay 21C transmit AC power to each customer 30 provided in the district C? Switch between no.

  For example, when a power failure occurs due to a natural disaster or the like, the power transmission control unit 21 switches the relay to stop AC power transmission to each bank. On the other hand, when the power failure is restored, the power transmission control unit 21 starts transmission of AC power to each bank by switching the relay.

  The transmission unit 22 transmits information for notifying transmission stop of AC power and transmission start of AC power to each customer 30. Specifically, when a power failure occurs due to a natural disaster or the like, the transmission unit 22 transmits information (interconnection stop instruction) for notifying that transmission of AC power is stopped to each customer 30. . On the other hand, when the power failure is restored, the transmission unit 22 transmits information (interconnection start instruction) for notifying that transmission of AC power is started to each customer 30.

  The transmission unit 22 transmits information such as a grid stop instruction and a grid start instruction to each customer 30 using each power transmission line 50. Further, the transmission unit 22 transmits information such as an interconnection stop instruction and an interconnection start instruction to each customer 30 through a transmission path different from each transmission line 50. For example, in the terrestrial digital broadcasting, the transmission unit 22 transmits information such as an interconnection stop instruction and an interconnection start instruction to each consumer 30 using a data distribution area provided separately from the content distribution area.

  The interconnection stop instruction includes area information for specifying an area where the connection between the bank and the power generation apparatus should be stopped. Similarly, the interconnection start instruction includes area information for specifying an area where the connection between the bank and the power generation apparatus is to be started (started). Here, the area information may be information specifying a bank (district). Further, the area information may be information for specifying an area wider than the bank (district), or may be information for specifying an area narrower than the bank (district). For example, the area information may be information for specifying an area divided in units of municipalities, or may be information hierarchized according to the area size.

  As described above, the substation 20 is a transmission device that transmits an interconnection start instruction to a grid interconnection device provided in each customer 30 using a predetermined transmission path. Note that the transmission device is not limited to the substation 20. Moreover, the grid connection system provided with a transmission apparatus is called a power control system.

(Composition of customers)
Below, the structure of the consumer which concerns on 1st Embodiment is demonstrated, referring drawings. FIG. 3 is a block diagram illustrating a configuration of the customer 30 according to the first embodiment.

  As illustrated in FIG. 3, the consumer 30 includes a plurality of power consuming devices 31 (power consuming devices 31A to 31C), a plurality of power generating devices 32 (power generating devices 32A to 32B), and interconnection switching. The unit 33 and the grid interconnection device 100 are included. It should be noted that the power generation device 32 and the grid interconnection device 100 constitute a grid interconnection system.

  The power consuming device 31 is a home appliance or the like that operates while consuming AC power transmitted through a bank (transmission line 50), power generated by the power generation device 32, or the like.

  The power generation device 32 is a device such as a solar power generation device, a fuel cell power generation device, or a wind power generation device. The power generation device 32 can generate power without using AC power transmitted through the bank (transmission line 50).

  The interconnection switching unit 33 links the bank (power transmission line 50) and the power generation device 32 or disconnects the bank (power transmission line 50) and the power generation device 32 in accordance with an instruction from the grid interconnection device 100. Switch between.

  Here, in a state where the bank and the power generation device 32 are connected, the power generated by the power generation device 32 is not only consumed by the own consumer 30 but also to other consumers 30 via the transmission line 50. Power is transmitted. On the other hand, in a state where the bank and the power generation device 32 are disconnected, the power generated by the power generation device 32 is not transmitted to the other customers 30 via the transmission line 50.

  The grid interconnection device 100 controls interconnection between the bank (power transmission line 50) and the power generation device 32 in accordance with whether or not AC power is transmitted through the power transmission line 50. Specifically, as shown in FIG. 4, the grid interconnection device 100 includes a detection unit 101, a reception unit 102, a storage unit 103, a determination unit 104, and an interconnection control unit 105.

  The detection unit 101 monitors the state of AC power transmitted through the bank (power transmission line 50). Moreover, the detection part 101 detects whether alternating current power is transmitted via the bank based on the state of alternating current power.

  For example, the detection unit 101 monitors voltage, phase difference between voltage and current, frequency, change in voltage, change in voltage phase, change in frequency, and the like for AC power transmitted through the bank. The detection unit 101 detects whether AC power is being transmitted through the bank, based on voltage, phase difference between voltage and current, frequency, voltage change, voltage phase change, frequency change, and the like. For example, the detection unit 101 transmits AC power when the voltage, phase difference between voltage and current, frequency, voltage change, voltage phase change, frequency change, and the like are within the allowable range of commercial power. Judge that started.

  Specifically, regarding the “voltage”, if the voltage of the AC power is within a predetermined range with respect to the standard voltage (AC100V, AC200V), the detection unit 101 determines that transmission of the AC power is started. .

  Regarding the “phase difference between voltage and current”, if the phase difference between the voltage and current of the AC power is within a predetermined range, the detection unit 101 determines that transmission of AC power has started.

  As for “frequency”, if the frequency of AC power is within a predetermined range with respect to the standard frequency of commercial power (60 Hz or 50 Hz, depending on the region), the detection unit 101 has started transmission of AC power. to decide.

  Regarding “change in voltage”, if the amount of change in the voltage of the AC power is within a predetermined range, the detection unit 101 determines that transmission of the AC power has started.

  As for “change in voltage phase”, if the amount of change in the phase of the AC power voltage is within a predetermined range, the detection unit 101 determines that transmission of AC power has started.

  Regarding “frequency change”, if the amount of change in the frequency of the AC power is within a predetermined range, the detection unit 101 determines that transmission of the AC power has started.

  The receiving unit 102 receives information for notifying the occurrence of a power failure (interconnection stop instruction), information for notifying the recovery from a power failure (interconnection start instruction), and the like.

  Specifically, the receiving unit 102 receives information such as an interconnection stop instruction and an interconnection start instruction using each power transmission line 50. The receiving unit 102 also receives information such as a grid stop instruction and a grid start instruction on a transmission path different from each power transmission line 50. For example, in the terrestrial digital broadcasting, the receiving unit 102 receives information such as a connection stop instruction and a connection start instruction using a data distribution area provided separately from the content distribution area.

  The memory | storage part 103 memorize | stores the information (own area information) which identifies the area where the own consumer 30 was provided. The local area information includes, for example, information for specifying a district where the customer 30 is provided (a bank to which the customer 30 is connected), information for specifying a wider area than the district where the customer 30 is provided, and the like. It is.

  The memory | storage part 103 memorize | stores the information (adjacent area information) which specifies the area | region (adjacent area) adjacent to the area where the consumer 30 was provided. The adjacent area information is, for example, information for identifying a district adjacent to the district where the consumer 30 is provided (a bank adjacent to the bank to which the consumer 30 is connected), from the district where the consumer 30 is provided. Also, information that identifies areas adjacent to a wide area.

  The storage unit 103 stores the order of starting the linkage of the power generation device 32 when it is determined that the linkage between the bank and the power generation device 32 should be started. The order of starting the interconnection of the power generation devices 32 may be the order in which the power generation amount of the power generation device 32 is large or the order in which the power generation amount of the power generation device 32 is small. The order of starting the interconnection of the power generation apparatus 32 may be the order in which the environmental load (for example, CO2 emission amount) of the power generation apparatus 32 is small. It is preferable that the order of starting the interconnection of the power generation devices 32 is determined so that the balance between the load state of the power consuming device 31 provided in the customer 30 and the power generation amount of the power generation device 32 is maintained.

  Based on the result detected by the detection unit 101 and the information received by the reception unit 102, the determination unit 104 should disconnect the bank (power transmission line 50) and the power generation device 32, or the bank (power transmission line 50). It is determined whether the power generation device 32 should be linked.

  Specifically, the determination unit 104 determines whether the AC and the power generation stop when the reception unit 102 receives a connection stop instruction including local area information after the detection stop of the AC power transmission is detected by the detection unit 101. It is determined that the connection with the device 32 should be stopped. That is, the determination unit 104 determines that the bank and the power generation device 32 should be disconnected.

  On the other hand, in the case where the start of AC power transmission is detected by the detection unit 101 and the connection start instruction including the local area information is received by the reception unit 102, the determination unit 104 determines that the bank and the power generation device 32. It is determined that the linkage with should be started. That is, the determination unit 104 determines that the bank and the power generation device 32 should be linked.

  The determination unit 104 determines that the connection between the bank and the power generation device 32 should be prepared when the connection start instruction including the adjacent area information is received by the reception unit 102. Here, examples of the power generation device 32 that should be prepared for interconnection include a fuel cell system, a micro gas turbine, and an engine generator that require time for preparation for interconnection.

  The interconnection control unit 105 controls the interconnection between the bank and the power generation device 32 according to the result determined by the determination unit 104. Specifically, when it is determined that the connection between the bank and the power generation device 32 should be stopped, the connection control unit 105 disconnects the bank and the power generation device 32 from the connection switching unit 33. To instruct.

  On the other hand, if it is determined that the connection between the bank and the power generation device 32 should be started, the connection control unit 105 instructs the connection switching unit 33 to start the connection between the bank and the power generation device 32. Instruct. Here, the interconnection control unit 105 instructs the power generation device 32 to start the interconnection of the power generation device 32 according to the order stored in the storage unit 103.

  When it is determined that the connection between the bank and the power generation device 32 is to be prepared, the interconnection control unit 105 instructs the power generation device 32 to prepare for the connection of the power generation device 32.

  The interconnection control unit 105 controls the power generated by the power generation device 32 so as to synchronize with the AC power of the bank. Specifically, when the power generation device 32 is a DC power source (for example, a photovoltaic power generation system or a fuel cell system), the interconnection control unit 105 boosts DC power generated by the power generation device 32 with a booster circuit. Later, in order to synchronize with the AC power of the bank, the inverter circuit converts it to AC power. On the other hand, when the power generation device 32 is an AC power source (for example, a wind power generation system), the interconnection control unit 105 converts the AC power generated by the power generation device 32 into a DC by a rectifier circuit, and then converts the AC to the bank In order to synchronize with electric power, it is converted into AC power by an inverter circuit. Alternatively, the interconnection control unit 105 directly converts AC power generated by the power generation device 32 into AC power using a matrix converter circuit, a cycloconverter circuit, or the like in order to synchronize with the AC power of the bank.

(Operation of grid interconnection device)
Hereinafter, the operation of the grid interconnection apparatus according to the first embodiment will be described with reference to the drawings. FIG. 5 is a flowchart showing the operation of the grid interconnection device 100 according to the first embodiment. In FIG. 5, it should be noted that the operation of the grid interconnection device 100 that starts the interconnection between the bank and the power generation device 32 will be described.

  As shown in FIG. 5, in step 10, grid interconnection device 100 detects the start of AC power transmission based on the state of AC power transmitted via the bank (power transmission line 50).

  In step 20, the grid interconnection device 100 determines whether or not an interconnection start instruction has been received. Subsequently, when the grid interconnection device 100 receives the interconnection start instruction, the grid interconnection device 100 proceeds to the process of step 30. On the other hand, the grid interconnection device 100 waits for reception of a grid connection start instruction until it receives a grid connection start instruction.

  In step 30, the grid interconnection device 100 determines whether or not the area information included in the interconnection start instruction is its own area information. When the regional information included in the interconnection start instruction is the local area information, the grid interconnection device 100 proceeds to the process of step 40, and when the regional information included in the interconnection start instruction is not the local area information. The process proceeds to step 50.

  In step 40, the grid interconnection device 100 starts interconnection between the bank and the power generation device 32 (interconnection start processing). Here, the grid interconnection device 100 starts interconnection of the power generation device 32 in accordance with the order stored in the storage unit 103. The details of the interconnection start process will be described later (see FIGS. 10 and 12).

  In step 50, the grid interconnection device 100 determines whether or not the area information included in the interconnection start instruction is adjacent area information. When the area information included in the interconnection start instruction is adjacent area information, the grid interconnection apparatus 100 moves to the process of step 60, and when the area information included in the interconnection start instruction is not adjacent area information. Returning to the process of step 20.

  In step 60, the grid interconnection device 100 prepares interconnection between the bank and the power generation device 32. Specifically, the grid interconnection device 100 prepares to start interconnection of the power generation device 32.

  Note that the grid interconnection device 100 may transmit an error message to the substation 20 side when the reception start state of the interconnection start instruction continues in step 20 for a predetermined time or more.

  In step 70, the grid interconnection device 100 determines whether all the power generation devices 32 are linked to the bank. The grid interconnection device 100 ends the series of processes when all the power generation devices 32 are linked to the bank, and proceeds to the processing of step 80 when all the power generation devices 32 are not linked to the bank. Move.

  In step 80, the grid interconnection device 100 shifts to the next time limit. Subsequently, in step 90, the grid interconnection device 100 acquires the load (A) of the power consumption device 31 and the power generation amount (B) of the power generation device 32 corresponding to the current time limit.

  Here, when the consumer 30 or the like makes a contract with the power company, the type of the power consuming device 31 and the contracted power amount are presented to the power company. When the customer 30 or the like introduces the power generation device 32, the type and power generation capacity of the power generation device 32 are presented to the power company.

  Therefore, the grid interconnection device 100 can acquire the load (A) of the power consumption device 31 and the power generation amount (B) of the power generation device 32 corresponding to each time period based on the information presented to the power company. Should. That is, the load (A) of the power consuming device 31 and the power generation amount (B) of the power generation device 32 corresponding to each time period are information known to the grid interconnection device 100 or information that can be estimated for the grid interconnection device 100. It is.

  Therefore, the load (A) of the power consumption device 31 and the power generation amount (B) of the power generation device 32 are the load of the power consumption device 31 provided in the customer 30 having the grid interconnection device 100 and the power generation amount of the power generation device 32. It may be. Further, the load (A) of the power consumption device 31 and the power generation amount (B) of the power generation device 32 are the load of the power consumption device 31 connected to the bank including the grid interconnection device 100 and the power generation amount of the power generation device 32. May be.

(Function and effect)
According to the grid interconnection device 100 according to the first embodiment, the interconnection control unit 105 is instructed to start interconnection in a state where it is detected that transmission of AC power is started via the transmission line 50 (bank). Is received, the interconnection between the power transmission line 50 (bank) and the power generation device 32 is started. Therefore, it is suppressed that the consumer 30 side arbitrarily starts interconnection of the power generation device 32 and an excessive load is imposed on the transmission line 50.

  Therefore, when the transmission of AC power from the substation 20 is restored, the connection between the power transmission line 50 (bank) and the power generation device 32 is started while suppressing an excessive load on the power transmission line. be able to.

  According to the grid interconnection device 100 according to the first embodiment, the interconnection control unit 105, when the area information included in the interconnection start instruction is adjacent area information, the power transmission line 50 (bank) and the power generation apparatus 32. Prepare for interconnection. In general, when the connection between the bank and the power generation device 32 is possible in the adjacent area, there is a high possibility that the bank and the power generation device 32 can be connected in the local area. In such a case, by preparing the connection between the bank and the power generation device 32 in advance, the connection between the bank and the power generation device 32 can be quickly started.

[Second Embodiment]
The second embodiment will be described below with reference to the drawings. In the following, differences between the first embodiment and the second embodiment described above will be mainly described.

  Specifically, in the first embodiment described above, the customer 30 includes a power generation device such as a solar power generation device, a fuel cell power generation device, or a wind power generation device as a power supply device. On the other hand, in the second embodiment, the customer 30 has a power storage device such as a secondary battery, a flyhole power storage device, or an electric double layer capacitor power storage device as a power supply device.

(Composition of customers)
Below, the structure of the consumer which concerns on 2nd Embodiment is demonstrated, referring drawings. FIG. 6 is a block diagram illustrating a configuration of the customer 30 according to the second embodiment.

  As illustrated in FIG. 6, the consumer 30 includes a plurality of power consuming devices 31 (power consuming devices 31A to 31C), a plurality of power storage devices 34 (power storage devices 34A to 34B), and interconnection switching. The unit 33 and the grid interconnection device 100 are included. It should be noted that the power storage device 34 and the grid interconnection device 100 constitute a grid interconnection system.

  The power consuming device 31 is a household appliance that operates while consuming AC power transmitted through a bank (power transmission line 50), power supplied by the power storage device 34, and the like.

  The power storage device 34 is a power storage device such as a secondary battery, a flyhole power storage device, or an electric double layer capacitor power storage device. The power storage device 34 stores AC power transmitted through the bank (power transmission line 50), and can supply power to the plurality of power consuming devices 31 and transmit power to other consumers 30.

  Specifically, when the power consumption in the plurality of power consumption devices 31 is small, the power storage device 34 stores the alternating current transmitted through the bank (transmission line 50) and consumes in the plurality of power consumption devices 31. When the power is large, the power supply to the plurality of power consuming devices 31 is preferentially performed over the power transmission to the other consumers 30.

  In addition, when the electricity charges are set in stages in the season or time zone, the power storage device 34 transmits AC power through the bank (power transmission line 50) at a time or time zone when the electricity charges are cheap. The power is stored, and the power supply to the plurality of power consuming devices 31 and the power transmission to the other consumers 30 are preferentially performed at a time and time period when the electricity rate is high.

  The interconnection switching unit 33 links the bank (power transmission line 50) and the power storage device 34 or disconnects the bank (power transmission line 50) and the power storage device 34 in accordance with an instruction from the grid interconnection device 100. Switch between.

  Here, in a state where the bank and the power storage device 34 are connected, the power supplied by the power storage device 34 is not only consumed by the own consumer 30, but also to the other customers 30 via the power transmission line 50. Power is transmitted. On the other hand, in a state where the bank and the power storage device 34 are disconnected, the power supplied by the power storage device 34 is not transmitted to the other customers 30 via the power transmission line 50.

  The grid interconnection device 100 controls interconnection between the bank (power transmission line 50) and the power storage device 34 depending on whether or not AC power is being transmitted through the power transmission line 50.

[Third Embodiment]
Hereinafter, a third embodiment will be described with reference to the drawings. The third embodiment is a combination of the first embodiment and the second embodiment described above. Specifically, in the third embodiment, the customer 30 includes a power generation device 32 and a power storage device 34 as a power supply device.

(Composition of customers)
Below, the structure of the consumer which concerns on 3rd Embodiment is demonstrated, referring drawings. FIG. 7 is a block diagram illustrating a configuration of the customer 30 according to the third embodiment.

  As shown in FIG. 7, the customer 30 includes a plurality of power consuming devices 31 (power consuming devices 31 </ b> A to 31 </ b> C), a power generating device 32, a power storage device 34, an interconnection switching unit 33, and a grid connection. System device 100. It should be noted that the power generation device 32, the power storage device 34, and the grid interconnection device 100 constitute a grid interconnection system.

  Note that the power consuming device 31, the interconnection switching unit 33, and the grid interconnection device 100 are the same as those in the first embodiment and the second embodiment described above, and thus description thereof will be omitted as appropriate.

  The power generation device 32 and the power storage device 34 are connected to the grid interconnection device 100 in parallel.

  The power generation device 32 is a device such as a solar power generation device, a fuel cell power generation device, or a wind power generation device, as in the first embodiment described above. The power generation device 31A can generate electric power without using an alternating current transmitted through the bank (power transmission line 50).

  The power storage device 34 is a power storage device such as a secondary battery, a flyhole power storage device, and an electric double layer capacitor power storage device, as in the second embodiment described above. The power storage device 34 stores AC power transmitted via the bank (power transmission line 50), and can supply power to the plurality of power consuming devices 31 and transmit power to other consumers 30.

[Fourth Embodiment]
Hereinafter, a fourth embodiment will be described with reference to the drawings. In the following, differences between the above-described third embodiment and the fourth embodiment will be mainly described.

  Specifically, in the third embodiment described above, the power generation device 32 and the power storage device 34 are connected to the grid interconnection device 100 in parallel. On the other hand, in 4th Embodiment, the electric power generating apparatus 32 and the electrical storage apparatus 34 are connected to the grid connection apparatus 100 in series.

(Composition of customers)
Below, the structure of the consumer which concerns on 4th Embodiment is demonstrated, referring drawings. FIG. 8 is a block diagram illustrating a configuration of the customer 30 according to the fourth embodiment.

  As shown in FIG. 8, the consumer 30 includes a plurality of power consuming devices 31 (power consuming devices 31 </ b> A to 31 </ b> C), a power generating device 32, a power storage device 34, an interconnection switching unit 33, and a grid connection. System device 100. It should be noted that the power generation device 32, the power storage device 34, and the grid interconnection device 100 constitute a grid interconnection system.

  Note that the power consuming device 31, the interconnection switching unit 33, and the grid interconnection device 100 are the same as those in the first embodiment and the second embodiment described above, and thus description thereof will be omitted as appropriate.

  The power generation device 32 and the power storage device 34 are connected to the grid interconnection device 100 in series. Specifically, the power storage device 34 is connected to the grid interconnection device 100, and the power generation device 32 is connected to the power storage device 34.

  The power generation device 32 is a device such as a solar power generation device, a fuel cell power generation device, or a wind power generation device, as in the first embodiment described above. The power generation device 32 can generate electric power without using an alternating current transmitted through the bank (power transmission line 50).

  The power storage device 34 is a power storage device such as a secondary battery, a flyhole power storage device, and an electric double layer capacitor power storage device, as in the second embodiment described above. The power storage device 34 stores AC power transmitted via the bank (power transmission line 50), and can supply power to the plurality of power consuming devices 31 and transmit power to other consumers 30.

  Here, when the power generation device 32 is a solar power generation device, a wind power generation device, or the like, the power generated due to weather conditions or the like is not constant, so the power supplied to the plurality of power consumption devices 31 and other consumers It is necessary to level the power transmitted to 30. Therefore, in the fourth embodiment, the power storage device 34 stores the power generated from the power generation device 32 and leveles the power supplied to the plurality of power consumption devices 31 and the power transmitted to the other consumers 30. It is possible.

[Fifth Embodiment]
Hereinafter, a fifth embodiment will be described with reference to the drawings. In the following, differences between the above-described first to fourth embodiments and the fifth embodiment will be mainly described.

  Specifically, although not described in detail in the first embodiment to the fourth embodiment described above, in the fifth embodiment, the bank and the power supply device ( The operation (interconnection start process) of the grid interconnection device 100 that starts interconnection with the power generation device 32 or the power storage device 34) will be described.

(Start of interconnection of power supply)
Hereinafter, the start of interconnection of the power supply device according to the fifth embodiment will be described with reference to the drawings. FIG. 9 is a diagram for explaining the start of interconnection of the power supply device according to the fifth embodiment.

  As shown in FIG. 9, when the customer 30 is a factory, the increase in the load (power consumption) of the power consuming device 31 provided in the factory is small immediately after the power failure is restored, and the time elapses. It grows with it. This is because the power consuming apparatus 31 provided in the factory is a machine tool or the like, and after the machine tool is inspected or the machine tool is automatically started, the machine tool is fully operated.

  Therefore, in order to maintain a balance between the load (power consumption) of the power consuming device 31 and the power supply amount of the power supply device, the power supply devices are linked in order from the power supply device with the smallest power supply amount. This reduces the possibility that the amount of power transmitted to the bank (transmission line 50) side will be temporarily excessive.

  The power supply amount is the amount of power that can be supplied by the power supply device. The power supply amount is determined according to the power generation amount of the power generation device 32, the power storage amount of the power storage device 34, and the like.

(Operation of grid interconnection device)
Hereinafter, the operation of the grid interconnection apparatus according to the fifth embodiment will be described with reference to the drawings. FIG. 10 is a flowchart showing the operation of the grid interconnection device 100 according to the fifth embodiment. FIG. 10 shows the process executed in step 40 described above.

  As shown in FIG. 10, in step 110, the grid interconnection device 100 sets initial values for the load (A) of the power consuming device 31 and the power supply amount (B) of the power supply device. The initial value of the load (A) is the load of the power consuming device 31 at which the interconnection is first started after the power failure is restored. The initial value of the power supply amount (B) is “0”.

  In step 120, the grid interconnection device 100 sets the load (A) to the difference (Dold) between the load (A) and the power supply amount (B). The difference (Dold) is a difference between the load (A) and the power supply amount (B) before starting the connection of a new power supply device.

  It should be noted that when the process of step 90 described above is performed, the processes of step 110 and step 120 are omitted.

  In step 130, the grid interconnection device 100 sets the absolute value of the difference between the load (A) and the power supply amount (B) as the difference (Dnow) between the load (A) and the power supply amount (B). Note that the difference (Dnow) is the difference between the load (A) and the power supply amount (B) after starting the connection of a new power supply device. It should be noted that the load (A) and the power supply amount (B) are information acquired in step 90 described above.

  In step 140, the grid interconnection device 100 determines whether or not the difference (Dnow) is equal to or less than a threshold value (Dth). When the difference (Dnow) is equal to or less than the threshold value (Dth), the grid interconnection device 100 determines that the balance between the load (A) and the power supply amount (B) is maintained, and performs a series of processes. finish. On the other hand, when the difference (Dnow) is larger than the threshold value (Dth), the grid interconnection device 100 proceeds to the process of step 150.

  In step 150, the grid interconnection device 100 determines whether or not the load (A) is larger than the power supply amount (B). When the load (A) is larger than the power supply amount (B), the grid interconnection device 100 determines that the power supply amount is insufficient, and proceeds to the processing of step 180. On the other hand, when the load (A) is smaller than the power supply amount (B), the grid interconnection device 100 determines that the power supply amount is excessive, and proceeds to the process of step 160.

  In step 160, the grid interconnection device 100 determines whether or not the difference (Dold) is equal to or greater than the difference (Dnow). When the difference (Dold) is equal to or greater than the difference (Dnow), the grid interconnection device 100 determines that the balance between the load (A) and the power supply amount (B) is improved, and performs a series of processes. finish. On the other hand, if the difference (Dold) is less than the difference (Dnow), the grid interconnection device 100 determines that the balance between the load (A) and the amount of power supply (B) has deteriorated, and Move on to processing.

  In step 170, the grid interconnection device 100 cancels the interconnection of the power supply device added last time, that is, disconnects the power supply device added last time.

  In step 180, the grid interconnection device 100 sets the difference (Dnow) as the difference (Dold).

  In step 190, the grid interconnection device 100 starts interconnection of the power supply devices with the smallest power supply amount among the power supply devices that have not started interconnection.

  As described above, the load (A) and the power supply amount (B) may be the load of the power consuming device 31 provided in the consumer 30 having the grid interconnection device 100 and the power supply amount of the power supply device. In this case, the order of starting the interconnection of the power supply devices is determined based on the load of the power consuming device 31 provided in the customer 30 having the grid interconnection device 100 and the power supply amount of the power supply device.

  On the other hand, as described above, the load (A) and the power supply amount (B) may be the load of the power consuming device 31 connected to the bank including the grid interconnection device 100 and the power supply amount of the power supply device. In this case, the order of starting the interconnection of the power supply devices is determined based on the load of the power consuming device 31 connected to the bank including the grid interconnection device 100 and the power supply amount of the power supply device.

[Sixth Embodiment]
The sixth embodiment will be described below with reference to the drawings. In the following, differences between the above-described first to fourth embodiments and the sixth embodiment will be mainly described.

  Specifically, although not described in detail in the first embodiment to the fourth embodiment described above, in the sixth embodiment, a bank and a power supply device ( The operation (interconnection start process) of the grid interconnection device 100 that starts interconnection with the power generation device 32 or the power storage device 34) will be described.

(Start of interconnection of power supply)
Hereinafter, the start of interconnection of the power supply device according to the sixth embodiment will be described with reference to the drawings. FIG. 11 is a diagram for explaining the start of interconnection of the power supply device according to the sixth embodiment.

  As shown in FIG. 11, when the consumer 30 is a general house, the amount of increase in the load (power consumption) of the power consuming device 31 provided in the general house is the largest immediately after the power failure is restored, and the time It will get smaller as time passes. This is because the power consuming device 31 provided in a general house is a general home appliance, and the power consumption of the connection of the general home appliance starts with the restoration of the power failure.

  Therefore, in order to maintain the balance between the load (power consumption) of the power consuming device 31 and the power supply amount of the power supply device, the power supply devices are linked in order from the power supply device with the largest power supply amount. This reduces the possibility that the amount of power received from the bank (transmission line 50) side will be temporarily excessive.

(Operation of grid interconnection device)
The operation of the grid interconnection device according to the sixth embodiment will be described below with reference to the drawings. FIG. 12 is a flowchart showing the operation of the grid interconnection device 100 according to the sixth embodiment. FIG. 12 shows the processing executed in step 40 described above.

  In FIG. 12, it should be noted that the same processing steps as those in FIG. 10 are given the same step numbers. That is, the processing of step 110 to step 180 is the same processing as in FIG. Therefore, the description of step 110 to step 180 is omitted.

  In step 192, the grid interconnection device 100 starts interconnection of the power supply devices having the largest power supply amount among the power supply devices that have not started interconnection.

  As described above, the load (A) and the power supply amount (B) may be the load of the power consuming device 31 provided in the consumer 30 having the grid interconnection device 100 and the power supply amount of the power supply device. In this case, the order of starting the interconnection of the power supply devices is determined based on the load of the power consuming device 31 provided in the customer 30 having the grid interconnection device 100 and the power supply amount of the power supply device.

  On the other hand, as described above, the load (A) and the power supply amount (B) may be the load of the power consuming device 31 connected to the bank including the grid interconnection device 100 and the power supply amount of the power supply device. In this case, the order of starting the interconnection of the power supply devices is determined based on the load of the power consuming device 31 connected to the bank including the grid interconnection device 100 and the power supply amount of the power supply device.

[Seventh Embodiment]
Hereinafter, a seventh embodiment will be described with reference to the drawings. In the following description, differences between the above-described first to fourth embodiments and the seventh embodiment will be mainly described.

  Specifically, although not described in detail in the first to fourth embodiments described above, in the seventh embodiment, the grid interconnection device 100 is configured such that the area information included in the interconnection start instruction is local area information. In this case, the power supply amount of the power supply device is compared with a predetermined comparison value.

(Operation of grid interconnection device)
Below, operation | movement of the grid connection apparatus which concerns on 7th Embodiment is demonstrated, referring drawings. FIG. 13 is a flowchart showing the operation of the grid interconnection device 100 according to the seventh embodiment.

  In FIG. 13, it should be noted that the same step numbers are assigned to the same processes as in FIG. 5. That is, the processing in steps 10 to 60 is the same as that in FIG. Therefore, the description of step 10 to step 60 is omitted.

  In step 32, the grid interconnection device 100 compares the power supply amount of the power supply device with a predetermined comparison value. When the power supply amount of the power supply apparatus is less than the comparison value, the grid interconnection apparatus 100 proceeds to the process of step 40, and when the power supply amount of the power supply apparatus is equal to or greater than the comparison value, the system interconnection apparatus 100 proceeds to the process of step 60. .

  Here, it should be noted that the comparison value is predetermined by the substation 20 or the like. In the seventh embodiment, it should be noted that the comparison value increases with an increase in the time elapsed since the start of AC power transmission (recovery).

  The interconnection start instruction may include power supply amount information (that is, the above-described comparison value) that specifies the power supply amount of the power supply device that starts the connection with the bank. Here, the substation 20 determines the power supply amount information (comparison value) for each bank provided under the substation 20 in consideration of the load state of the power consuming device 31 and the power supply amount of the power supply device. Therefore, it is possible to control the interconnection of the power supply devices in consideration of the load state and the power supply amount in units of banks, not in units of consumers 30.

[Eighth Embodiment]
The eighth embodiment will be described below with reference to the drawings. In the following, differences between the above-described seventh embodiment and the eighth embodiment will be mainly described.

  Specifically, in the above-described seventh embodiment, the power supply devices are interconnected in order from the power supply device with the smallest power supply amount. On the other hand, in the eighth embodiment, the power supply devices are interconnected in order from the power supply device with the largest power supply amount.

(Operation of grid interconnection device)
The operation of the grid interconnection device according to the eighth embodiment will be described below with reference to the drawings. FIG. 14 is a flowchart showing the operation of the grid interconnection device 100 according to the eighth embodiment.

  In FIG. 14, it should be noted that the same step numbers are assigned to the same processes as in FIG. That is, the processing in steps 10 to 60 is the same as that in FIG. Therefore, the description of step 10 to step 60 is omitted.

  In step 32, the grid interconnection device 100 compares the power supply amount of the power supply device with a predetermined comparison value. When the power supply amount of the power supply device is larger than the comparison value, the grid interconnection device 100 proceeds to the process of step 40, and when the power supply amount of the power supply device is equal to or greater than the comparison value, the grid interconnection device 100 proceeds to the process of step 60. .

  Here, it should be noted that the comparison value is predetermined by the substation 20 or the like. In the eighth embodiment, it should be noted that the comparison value decreases as the time elapsed from the start of AC power transmission (recovery).

  The interconnection start instruction may include power supply amount information (that is, the above-described comparison value) that specifies the power supply amount of the power supply device that starts the connection with the bank. Here, the substation 20 determines the power supply amount information (comparison value) for each bank provided under the substation 20 in consideration of the load state of the power consuming device 31 and the power supply amount of the power supply device. Therefore, it is possible to control the interconnection of the power supply devices in consideration of the load state and the power supply amount in units of banks, not in units of consumers 30.

[Other Embodiments]
Although the present invention has been described with reference to the above-described embodiments, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, in the above-described embodiment, the interconnection start instruction is transmitted using a data distribution area in terrestrial digital broadcasting, but is not limited thereto. Specifically, the connection start instruction uses a paging system, a mobile phone network, 802.11X-compliant wireless communication (wireless LAN), BS broadcasting, CS broadcasting, CATV, analog TV broadcasting, radio, cable broadcasting, and the like. Then, it may be transmitted to each consumer 30. The interconnection start instruction may be transmitted to each consumer 30 by expanding information used for time adjustment of the radio timepiece. The interconnection start instruction may be transmitted to each customer 30 using a network. When a network is used, confirmation may be made at regular intervals with a server or the like installed on the substation 20 side. That is, the information is updated on the server, and the information serves as an instruction for connection / disconnection / connection preparation.

  In the above-described embodiment, the interconnection start instruction includes the area information indicating the area where the connection between the bank and the power supply device is to be started, but is not limited thereto. Specifically, the interconnection start instruction may not include regional information.

  The interconnection start instruction may include information for specifying a power supply device that should start interconnection with the bank. In this case, the grid interconnection device 100 may start interconnection of the power supply device specified by the interconnection start instruction and prepare for interconnection of the power supply device not specified by the interconnection start instruction. preferable.

  Here, the interconnection start instruction is information specifying the type of the power supply device, such as the power supply amount of the power supply device (for example, 4 kW class), the power generation method of the power supply device (for example, solar power generation or wind power generation). May be included. Alternatively, the interconnection start instruction can specify the power supply device such as an identification number unique to the power supply device, a serial number assigned to the power supply device under the substation 20, and a registration number at the time of the interconnection contract. Such information may be included.

  In the embodiment described above, the order of starting the interconnection of the power supply devices is stored in the grid interconnection device 100 (storage unit 103), but is not limited to this. Specifically, the order of starting the interconnection of the power supply devices may be included in the interconnection start instruction.

  Although not mentioned in the above-described embodiment, the interconnection start instruction may include information for specifying the type of the customer 30. In this case, the substation 20 transmits an interconnection start instruction with higher priority to the customer 30 (medical facility, public facility, infrastructure facility) having higher importance than the customer 30 having lower importance. Is preferred.

  Here, when the customer 30 specified by the interconnection start instruction is the own customer 30, the grid interconnection device 100 naturally starts interconnection between the bank and the power supply device. Further, the grid interconnection device 100 may prepare for interconnection of the power supply device when the customer 30 specified by the interconnection start instruction is not the own customer 30.

  In the embodiment described above, the interconnection start instruction is transmitted to each customer 30 through two transmission paths, but is not limited to this. Specifically, the interconnection start instruction may be transmitted through one transmission path, or may be transmitted through three or more transmission paths.

  In the embodiment described above, the interconnection start instruction is transmitted from the substation 20, but is not limited to this. Specifically, the interconnection start instruction may be transmitted from another device (such as a power company or a broadcasting station). In addition, for example, a power supply device that has little influence on the distribution system even when connected, such as a power supply device with a small amount of power supply, appropriately stops the reception function of the connection start instruction and restores power simultaneously. Interconnection may be started.

It is the schematic which shows the structure of the power transmission system which concerns on 1st Embodiment. It is a block diagram which shows the structure of the substation 20 which concerns on 1st Embodiment. It is a block diagram which shows the structure of the consumer 30 which concerns on 1st Embodiment. It is a block diagram which shows the structure of the grid connection apparatus 100 which concerns on 1st Embodiment. It is a flowchart which shows operation | movement of the grid connection apparatus 100 which concerns on 1st Embodiment. It is a block diagram which shows the structure of the customer 30 which concerns on 2nd Embodiment. It is a block diagram which shows the structure of the consumer 30 which concerns on 3rd Embodiment. It is a block diagram which shows the structure of the customer 30 which concerns on 4th Embodiment. It is a figure for demonstrating the connection start of the power supply device which concerns on 5th Embodiment. It is a flowchart which shows operation | movement of the grid connection apparatus 100 which concerns on 5th Embodiment. It is a figure for demonstrating the connection start of the power supply device which concerns on 6th Embodiment. It is a flowchart which shows operation | movement of the grid connection apparatus 100 which concerns on 6th Embodiment. It is a flowchart which shows operation | movement of the grid connection apparatus 100 which concerns on 7th Embodiment. It is a flowchart which shows operation | movement of the grid connection apparatus 100 which concerns on 8th Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... High voltage power supply source, 20 ... Substation, 21 ... Power transmission control part, 22 ... Transmission part, 30 ... Consumer, 31 ... Power consumption apparatus, 32 ... Power generation device 34 ... Power storage device 40 ... High-voltage power transmission line 50 ... Power transmission line 100 ... System interconnection device 101 ... Detection unit 102 ... Reception unit 103 ..Storage unit 104 ... determination unit 105 ... interconnection control unit

Claims (10)

A grid interconnection device connected to a power distribution system to which AC power is transmitted and a power supply device provided to a consumer,
Based on the state of the AC power, a detection unit that detects that transmission of the AC power has started,
A receiving unit that receives an interconnection start instruction for instructing the start of interconnection between the power distribution system and the power supply device from a predetermined transmission path;
A control unit that controls interconnection between the power distribution system and the power supply device and disconnection of the power distribution system and the power supply device;
The control unit starts connection between the power distribution system and the power supply device when receiving the connection start instruction in a state where the detection unit detects that transmission of the AC power has started. A grid interconnection device characterized by that. The interconnection start instruction includes information identifying the power supply device that starts interconnection with the distribution system,
The grid interconnection device according to claim 1, wherein the control unit starts interconnection of the power supply device specified by the interconnection start instruction.   The grid interconnection apparatus according to claim 2, wherein preparation for interconnection of the power supply apparatus other than the power supply apparatus specified by the interconnection start instruction is performed.   The grid interconnection apparatus according to claim 2 or 3, wherein the interconnection start instruction includes information for specifying a type of the power supply apparatus. The interconnection start instruction includes area information for specifying an area for starting interconnection between the power distribution system and the power supply device,
2. The grid interconnection device according to claim 1, wherein when the area specified by the area information is a local area, the control unit starts linkage between the power distribution system and the power supply device. .   6. The control unit according to claim 5, wherein when the area specified by the area information is an area adjacent to its own area, preparation for interconnection between the power distribution system and the power supply device is performed. Grid interconnection device.   The power supply device includes a plurality of power supply devices, and the order of starting the interconnection of the plurality of power supply devices is based on a load state of a power consuming device provided in the consumer and a power supply amount of the plurality of power supply devices. The grid interconnection device according to claim 1, wherein the grid interconnection device is defined as follows. The connection start instruction includes power supply amount information for specifying the power supply amount of the power supply device that starts connection with the distribution system,
The said control part starts the connection of the said power distribution system and the said power supply device based on the said electric power feeding amount information, when the area specified by the said area information is an own area. 5. The grid interconnection apparatus according to 5. A grid interconnection system including a grid interconnection device connected to a distribution system to which AC power is transmitted, and a power supply device connected to the grid interconnection device,
The grid interconnection device is
Based on the state of the AC power, a detection unit that detects that transmission of the AC power has started,
A receiving unit that receives an interconnection start instruction for instructing the start of interconnection between the power distribution system and the power supply device from a predetermined transmission path;
A control unit that controls interconnection between the power distribution system and the power supply device and disconnection of the power distribution system and the power supply device;
The control unit starts connection between the power distribution system and the power supply device when receiving the connection start instruction in a state where the detection unit detects that transmission of the AC power has started. System interconnection system characterized by that. A grid interconnection device connected to a distribution system through which alternating current is transmitted;
A power supply connected to the grid interconnection device;
A transmission device that transmits an interconnection start instruction for instructing the start of interconnection between the power distribution system and the power supply device to the grid interconnection device via a predetermined transmission path;
The grid interconnection device is
Based on the state of the AC power, a detection unit that detects that transmission of the AC power has started,
A receiving unit that receives the interconnection start instruction from the transmission device via the predetermined transmission path;
A controller that controls interconnection between the power distribution system and the power supply device and disconnection of the power distribution system and the power supply device;
The control unit starts connection between the power distribution system and the power supply device when receiving the connection start instruction in a state where the detection unit detects that transmission of the AC power has started. A power control system characterized by that.

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