Switchgear-integrated control panel and power supply system

Abstract

To provide a changeover switch built-in board capable of surely suppressing a consumption of a commercial power in response to a request of a dropping DR, and provide a technique related to the same.SOLUTION: A power supply system 1 comprises: a commercial power supply system 2 containing a commercial power supply 21; a power storage system 3 containing a solar light power generation device 31 and a power storage battery 33; a load system 4; a power supply automatic switch board 5 containing a changeover switch 50; and a remote operation switch device 7 containing an instruction reception part. An aggregator 6 activates a dropping DR. The changeover switch 50 is electrically connected to each of the commercial power supply system 2, the power storage system 3, and the load system 4, switches a connection state of the commercial power supply system 2 and the load system 4, and switches the connection state of the power storage system 3 and the load system 4. The changeover switch 50 electrically separates the commercial power supply system 2 from the load system 4 under the condition that the instruction reception part of the remote operation switch device 7 receives the dropping DR, and electrically connects the power storage system 3 and the load system 4.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a panel incorporated with a switching disconnector capable of switching power according to downward DR and technologies related thereto.

Background Art

[0002] A VPP (Virtual Power Plant) is known which connects energy resources such as production facilities, private power generation facilities, storage batteries, and EVs (electric vehicles) owned by companies, local governments, etc. to each other and controls them by utilizing IoT technology so as to function like a single power plant.

[0003] Also, DR (Demand Response) is known as a mechanism for controlling power demand by a holder of an energy resource on the consumer side or a third party controlling the energy resource. DR is classified into two types: "downward DR" for reducing demand and "upward DR" for increasing demand, depending on the pattern of demand control.

[0004] Patent Document 1 discloses a power control unit and a distribution board system capable of making an existing facility compatible with a VPP. Specifically, the power control unit (1) includes a command receiving unit (111) and an output unit (12) (see FIG. 1 of Patent Document 1). The command receiving unit (111) receives a command from an aggregator (A1). The output unit (12) outputs a control signal for controlling a load (5) electrically connected to a distribution board (2) based on power information regarding power output from a distributed power source (4) and a command from the aggregator (A1).

[0005] When the command from the aggregator (A1) is downward DR, the output unit (12) transmits a control signal including a control command for suppressing or stopping the operation of a demand device (6) to the corresponding demand device (6). Alternatively, the output unit (12) transmits a control signal including a control command for discharging a storage battery (42) to the storage battery (42). Thereby, the power consumption of the load (5) is reduced.

[0006] On the other hand, if the command from the aggregator (A1) is for a power demand increase (DR), the output unit (12) transmits a control signal to the corresponding demand device (6) that includes a control command to increase the power consumption of the demand device (6). Alternatively, it transmits a control signal to the battery (42) that includes a control command to charge the battery (42). This increases the power consumption of the load (5). [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2021-100326 [Overview of the project] [Problems that the invention aims to solve]

[0008] According to the technology described in Patent Document 1 above, when a down DR is received from the aggregator, the power supply from the power grid (9) is suppressed by suppressing or stopping the operation of the demand equipment (6) or by discharging the storage battery (42).

[0009] However, in the technology described in Patent Document 1, even when a demand response (DR) request is received, the power supply from the power grid (9) does not completely stop, and a certain amount of power from the power grid (9) continues to be consumed. Therefore, there is a problem in that the consumption of commercial power cannot be sufficiently suppressed in response to a demand response request.

[0010] Therefore, the present invention aims to provide a control panel with a built-in changeover switch and related technologies that can reliably suppress the consumption of commercial power in response to the demand for reduced demand response (DR). [Means for solving the problem]

[0011] To achieve the above objective, the present invention provides a power supply system comprising: a commercial power supply system including a commercial power source; an energy storage system including a power generator and a battery; a load system including a load; a power automatic switching panel including a switch that is electrically connected to each of the commercial power supply system, the energy storage system and the load system, and which switches the connection state between the commercial power supply system and the load system and also switches the connection state between the energy storage system and the load system; an aggregator that activates a down DR (Demand Response); and a command receiving unit that receives the down DR from the aggregator via a network, wherein the switch electrically disconnects the commercial power supply system and the load system, and electrically connects the energy storage system and the load system, provided that the command receiving unit has received the down DR.

[0012] Herein, the system further comprises a first circuit section including a first terminal electrically connected to the commercial power supply system and the changeover switch, a second circuit section including a second terminal electrically connected to the energy storage system and the changeover switch, and a power conditioner capable of switching between a normal operation mode that outputs voltage to the first terminal and an independent operation mode that outputs voltage to the second terminal. A remote control switch including the command receiving unit is provided between the commercial power supply system and the first circuit, and while the command receiving unit receives the down DR, the remote control switch electrically disconnects the commercial power supply system and the changeover switch, cutting off the power supply from the commercial power supply system, and while the power supply from the commercial power supply system is cut off, the power conditioner switches to the independent operation mode, and in response to the input of voltage to the second terminal, the changeover switch electrically disconnects the commercial power supply system and the load system, and electrically connects the energy storage system and the load system.

[0013] Furthermore, the power conditioner further comprises a first circuit section including a first terminal electrically connected to the commercial power supply system and the changeover switch, a second circuit section including a second terminal electrically connected to the energy storage system and the changeover switch, and a power conditioner capable of switching between a normal operation mode that outputs voltage to the first terminal and a self-sustaining operation mode that outputs voltage to the second terminal, wherein the command receiving unit has a first command receiving unit provided in the power conditioner and a second command receiving unit provided in the changeover switch, and the power conditioner switches to the self-sustaining operation mode while the first command receiving unit is receiving the drop DR, and the changeover switch electrically disconnects the commercial power supply system and the load system and electrically connects the energy storage system and the load system when a voltage is input to the second terminal while the second command receiving unit is receiving the drop DR.

[0014] Furthermore, it is preferable that the system further includes a battery level measuring unit for measuring the remaining battery level of the storage battery, and that the changeover switch electrically disconnects the commercial power system and the load system, and electrically connects the storage system and the load system, with the additional condition that the remaining battery level is above a threshold.

[0015] Furthermore, it is preferable that the changeover switch includes a power consumption measuring unit for measuring the amount of power used by the energy storage system in conjunction with the power reduction DR, and a transmitting unit for transmitting the amount of power used to the aggregator.

[0016] Furthermore, the present invention provides a changeover switch that is electrically connected to each of a commercial power system including a commercial power source, an energy storage system including a power generator and a battery, and a load system including a load, and further provides a changeover switch that switches the connection state between the commercial power system and the load system and also switches the connection state between the energy storage system and the load system, and a command receiving unit that receives a demand response (DR) from an aggregator, wherein the changeover switch electrically disconnects the commercial power system and the load system and electrically connects the energy storage system and the load system, provided that the command receiving unit has received the demand response (DR). [Effects of the Invention]

[0017] According to the present invention, provided that the command receiving unit receives a downgrade DR, the commercial power system and the load system are electrically disconnected, and the energy storage system and the load system are electrically connected. That is, while a downgrade DR is being received, no power from the commercial power system is supplied to the load system. Therefore, it is possible to reliably suppress the consumption of commercial power in response to a downgrade DR request.

[0018] Furthermore, the fact that, as in the switching switch-integrated panel and power supply system of the present invention, the commercial power system and the load system are electrically separated and the energy storage system and the load system are electrically connected, provided that the command receiving unit receives a down DR, is not described at all in the aforementioned Patent Document 1. [Brief explanation of the drawing]

[0019] [Figure 1] A schematic diagram showing the system configuration of a power supply system according to the first embodiment of the present invention. [Figure 2] A functional block diagram showing the schematic configuration of the automatic power transfer panel according to the first embodiment. [Figure 3] A functional block diagram showing the schematic configuration of a remote-controlled switch according to the first embodiment. [Figure 4]Flowchart showing the circuit switching operation during reduced DR reception in the first embodiment. [Figure 5] Schematic diagram showing the flow of current to the load system during commercial power supply in the first embodiment. [Figure 6] Schematic diagram showing the connection state of the switch disconnector during non - commercial power supply in the first embodiment. [Figure 7] Schematic diagram showing the flow of current to the load system during non - commercial power supply in the first embodiment. [Figure 8] Schematic diagram showing the system configuration of the power supply system according to the second embodiment. [Figure 9] Functional block diagram showing the schematic configuration of the automatic power transfer switch according to the second embodiment. [Figure 10] Functional block diagram showing the schematic configuration of the power conditioner according to the second embodiment. [Figure 11] Flowchart showing the circuit switching operation during reduced DR reception in the second embodiment. [Figure 12] Schematic diagram showing the flow of current to the load system during commercial power supply in the second embodiment. [Figure 13] Schematic diagram showing the connection state of the switch disconnector during non - commercial power supply in the second embodiment. [Figure 14] Schematic diagram showing the flow of current to the load system during non - commercial power supply in the second embodiment.

Embodiments for Carrying Out the Invention

[0020] <1. First Embodiment> The switch disconnector built - in panel and the power supply system according to the first embodiment of the present invention will be described based on FIGS. 1 to 7. Hereinafter, as an example of the power supply system, the power supply system 1 shown in FIG. 1 will be exemplified. Also, as an example of the switch disconnector built - in panel, the automatic power transfer switch 5 shown in FIG. 1 will be exemplified.

[0021] As shown in Figure 1, the power supply system 1 comprises a commercial power supply system 2, an energy storage system 3, a load system 4, an automatic power transfer panel 5, an aggregator 6, and a remote control switch 7.

[0022] The commercial power system 2 is the power system from the power company and is equipped with the power company's commercial power supply 21. The energy storage system 3 consists of a solar power generation device 31, a storage battery 33, and a power conditioner 35. The load system 4 consists of a residential distribution board and is equipped with a load 41.

[0023] The automatic power transfer panel 5 comprises a changeover switch 50, a first circuit section 51, a second circuit section 52, a relay circuit section 53, and a load circuit section 54.

[0024] The changeover switch 50 is a switch that switches between the commercial power supply state ST1 shown in Figure 1 and the commercial power non-supply state ST2 shown in Figure 6. The commercial power supply state ST1 shown in Figure 1 is a connection state in which power from the commercial power supply 21 is supplied to the load system 4. The commercial power non-supply state ST2 shown in Figure 6 is a connection state in which power from the commercial power supply 21 is not supplied to the load system 4.

[0025] The first circuit section 51 is a circuit that is electrically connected to the commercial power system 2 and the changeover switch 50. The first circuit section 51 includes a first terminal section 511 that is electrically connected to the commercial power system 2, the changeover switch 50 and the relay circuit section 53.

[0026] The second circuit section 52 is a circuit that is electrically connected to the energy storage system 3 and the changeover switch 50. The second circuit section 52 includes a second terminal section 521 that is electrically connected to the energy storage system 3 and the changeover switch 50.

[0027] The relay circuit section 53 is a circuit electrically connected to the first circuit section 51. The relay circuit section 53 includes relay electrical equipment (not shown) for adding power from the energy storage system 3 to the commercial power supply in the commercial power supply state ST1.

[0028] The load circuit section 54 is a circuit electrically connected to the load 41 and the changeover switch 50. The load circuit section 54 includes load electrical equipment (not shown) that receives power from the changeover switch 50.

[0029] The power conditioner 35 is a device that converts electricity from the solar power generation system 31 and the storage battery 33 into alternating current and supplies it to the first circuit section 51 or the second circuit section 52. While power is supplied from the commercial power supply system 2, the power conditioner 35 outputs the voltage from the energy storage system 3 to the first terminal section 511 of the first circuit section 51. Hereinafter, the state in which the power conditioner 35 outputs the voltage from the energy storage system 3 to the first terminal section 511 of the first circuit section 51 will also be referred to as the normal operation mode.

[0030] On the other hand, when the power conditioner 35 detects a power outage (i.e., the power supply from the commercial power system 2 has stopped), it switches from normal operation mode to independent operation mode. In independent operation mode, the power conditioner 35 outputs the voltage of the energy storage system 3 to the second terminal 521 of the second circuit section 52.

[0031] As shown in Figure 2, the automatic power transfer panel 5 includes, in addition to the transfer switch 50 described above, a power consumption measurement unit 502 and a transmission unit 504. The transfer switch 50 also includes a transfer control unit 503. The transfer control unit 503, power consumption measurement unit 502, and transmission unit 504 are each implemented by a known controller or the like.

[0032] The switching control unit 503 is a processing unit for switching the changeover switch 50 to either a commercial power supply state ST1 or a commercial power non-supply state ST2.

[0033] Specifically, the switching control unit 503 controls the switching switch 50 so that it enters the commercial power supply state ST1 (Figure 1) while the voltage of the commercial power supply system 2 is input to the first terminal 511 of the first circuit unit 51.

[0034] As shown in Figure 5, in commercial power supply state ST1, power from commercial power system 2 and power from energy storage system 3 are supplied to load 41 through the path indicated by the thick dashed arrow. In other words, in commercial power supply state ST1, the power consumed by load 41 is the sum of the power from commercial power system 2 and the power from energy storage system 3.

[0035] On the other hand, the switching control unit 503 controls the switching switch 500 so that it enters a state of no commercial power supply ST2 (Figure 6) while the voltage of the commercial power supply system 2 is not input to the first terminal 511 of the first circuit unit 51 and the voltage of the energy storage system 3 is input to the second terminal 521.

[0036] As shown in Figure 7, in the commercial power outage state ST2, power from the energy storage system 3 is supplied to the load 41 through the path indicated by the thick dashed arrow. In other words, in the commercial power outage state ST2, in response to a demand response (DR) request, the load 41 is disconnected from the commercial power supply system 2, and only power from the energy storage system 3 is consumed by the load 41.

[0037] Refer to Figure 2 again. The power consumption measurement unit 502 is a processing unit that measures the amount of power consumed with respect to the power of the energy storage system 3 consumed in response to the request for reduced demand response (DR).

[0038] The transmitting unit 504 is a processing unit that transmits the amount of power consumption measured by the power consumption measurement unit 502 to the aggregator 6 via the internet and a router.

[0039] Refer to Figure 1 again. Aggregator 6 is the operator's computer that activates upward demand response (DR) and downward demand response (DR) to control the amount of demand from consumers and maintain the balance between the supply and demand of electricity.

[0040] The remote-controlled switch 7 is a switch installed between the commercial power system 2 and the first circuit section 51. The remote-controlled switch 7 is connected to the aggregator 6 via the internet and a router.

[0041] When the remote control switch 7 is in the ON state (connected) (see Figure 1), power supply from the commercial power system 2 to the automatic power transfer panel 5 is permitted. On the other hand, when the remote control switch 7 is in the OFF state (disconnected) (see Figure 6), power supply from the commercial power system 2 to the automatic power transfer panel 5 is stopped. In other words, by turning the remote control switch 7 to the OFF state (disconnecting it), a pseudo-power outage (hereinafter also referred to as a pseudo-power outage) occurs.

[0042] As shown in Figure 3, the remote control switch 7 comprises a command receiving unit 71, a switching control unit 73, and a battery level measuring unit 75. The command receiving unit 71, the switching control unit 73, and the battery level measuring unit 75 are each implemented by a known controller or the like.

[0043] The command receiving unit 71 is a processing unit that receives power reduction commands (DR) from the aggregator 6 via the internet and router. The battery level measurement unit 75 is a processing unit that measures the remaining battery level of the storage battery 33.

[0044] The switching control unit 73 is a processing unit that switches the connection or disconnection of the remote control switch 7 according to the reception status of the power reduction command (DR) received by the command receiving unit 71.

[0045] Specifically, the switching control unit 73 connects the remote control switch 7 when the command receiving unit 71 has not received a power reduction command (DR).

[0046] On the other hand, the switching control unit 73 disconnects the remote control switch 7 and generates a pseudo-power outage when the command receiving unit 71 receives a power reduction command (DR) and the battery level is above a threshold.

[0047] Next, we will explain in detail the circuit switching operation during down-draft reception, following the flowchart shown in Figure 4.

[0048] When the command receiving unit 71 (Figure 3) receives a power reduction command (DR) from the aggregator 6 (YES in step S1), the battery level measurement unit 75 (Figure 3) measures the remaining battery level of the storage battery 33 (step S2).

[0049] If it is determined in step S2 that the remaining battery level is above a preset threshold (YES in step S3), the switching control unit 73 (Figure 3) disconnects the remote control switch 7 and generates a simulated power outage (simulated power outage mode ON) (step S4).

[0050] When a simulated power outage occurs, the power conditioner 35 switches to independent operation mode, as described above. In independent operation mode, the voltage of the energy storage system 3 is output to the second terminal 521 of the second circuit section 52.

[0051] As a result, the voltage from the commercial power supply system 2 is not input to the first terminal 511 of the first circuit section 51, while the voltage from the energy storage system 3 is input to the second terminal 521 of the second circuit section 52. Accordingly, the switching control unit 503 (Figure 2) controls the switching switch 50 so that it enters the commercial power non-supply state ST2 (Figure 6) (step S5).

[0052] When the changeover switch 50 is switched to the commercial power non-supply state ST2, the battery level measurement unit 75 monitors the battery level of the storage battery 33. Here, as long as the storage battery 33 is above the threshold (YES in step S6) and a down DR is being received (YES in step S7), the switching control unit 503 continues to maintain the changeover switch 50 in the commercial power non-supply state ST2.

[0053] On the other hand, if the battery 33 falls below a threshold (NO in step S6) or if it stops receiving a down DR (NO in step S7), the switching control unit 73 (Figure 3) connects the remote control switch 7 and terminates the simulated power outage (simulated power outage mode OFF) (step S8). Once the simulated power outage ends, the power conditioner 35 returns from independent operation mode to normal operation mode.

[0054] As a result, the voltage from the commercial power supply system 2 and the voltage from the energy storage system 3 are input to the first terminal 511 of the first circuit section 51. Accordingly, the switching control unit 503 (Figure 2) controls the switching switch 50 so that it enters the commercial power supply state ST1 (Figure 1) (step S9).

[0055] Furthermore, the power consumption measurement unit 502 measures the amount of power consumed by the energy storage system 3 in response to the request for reduced demand response (step S10). Then, the transmission unit 504 transmits the amount of power consumed measured by the power consumption measurement unit 502 to the aggregator 6 via the internet and router (step S11).

[0056] According to the first embodiment described above, provided that the command receiving unit 71 receives a downgrade DR, the commercial power supply system 2 and the load system 4 are electrically disconnected, and the energy storage system 3 and the load system 4 are electrically connected. In other words, while a downgrade DR is being received, no power from the commercial power supply system 2 is supplied to the load system 4. Therefore, it is possible to reliably suppress the consumption of commercial power in response to a downgrade DR request.

[0057] Furthermore, according to the first embodiment described above, when the remaining charge of the storage battery 33 is above a threshold, the remote control switch 7 is disconnected, and the commercial power system 2 and the load system 4 are electrically disconnected. Conversely, when the remaining charge of the storage battery 33 is below the threshold, the commercial power system 2 and the load system 4 remain electrically connected. In other words, even if a down DR is received from the aggregator 6, if the remaining charge of the storage battery 33 is low and the storage battery 33's power supply capacity to the load system 4 is insufficient, the commercial power system 2 and the load system 4 are not electrically disconnected. Therefore, a stable power supply to the load system 4 can be ensured.

[0058] Furthermore, according to the first embodiment described above, after the reduction DR is canceled, the amount of electricity used in the energy storage system 3 that was consumed in response to the reduction DR request is transmitted to the aggregator 6. Therefore, it becomes possible to provide a reward to the consumer who responded to the reduction DR request from the aggregator 6, in proportion to the amount of electricity used.

[0059] <2. Second Embodiment> Next, with reference to Figures 8 to 14, the control panel with built-in changeover switch and power supply system according to the second embodiment will be described. Note that the second embodiment is a modified version of the first embodiment described above. Therefore, the following description will focus on the differences from the first embodiment, and parts common to both embodiments will be omitted from the description by using the same reference numerals.

[0060] As shown in Figure 8, the power supply system 1 according to the second embodiment differs from the first embodiment in that it does not include a remote control switch 7.

[0061] In the second embodiment, the changeover switch 50 and the power conditioner 35 are each connected to the aggregator 6 via the internet and a router.

[0062] Furthermore, as shown in Figure 9, the changeover switch 50 according to the second embodiment includes a command receiving unit 501 and a battery level measuring unit 505 in addition to the changeover control unit 503. The command receiving unit 501 is an example of the second command receiving unit according to the present invention.

[0063] Furthermore, as shown in Figure 10, the power conditioner 35 according to the second embodiment includes a command receiving unit 351. The command receiving unit 351 is an example of the first command receiving unit according to the present invention.

[0064] Both the command receiving unit 501 and the command receiving unit 351 simultaneously receive the power reduction DR as a power suppression command from the aggregator 6 via the internet and the router.

[0065] In the second embodiment, the method of controlling the changeover switch 50 by the changeover control unit 503 differs significantly from that of the first embodiment.

[0066] Specifically, the switching control unit 503 controls the switching switch 50 so that it enters the commercial power supply state ST1 (Figure 8) while the command receiving unit 501 is not receiving a down DR.

[0067] As shown in Figure 12, in the commercial power supply state ST1, power from the commercial power system 2 and power from the energy storage system 3 are supplied to the load 41 through the path indicated by the thick dashed arrow.

[0068] Meanwhile, the switching control unit 503, in response to the voltage of the energy storage system 3 being input to the second terminal unit 521 while the command receiving unit 501 is receiving a down DR, controls the switching switch 50 so that it enters the commercial power non-supply state ST2 (Figure 13).

[0069] As shown in Figure 14, in the commercial power non-supply state ST2, power from the energy storage system 3 is supplied to the load 41 through the path indicated by the thick dashed arrow.

[0070] Next, the circuit switching operation during down-range DR reception in the second embodiment will be explained with reference to the flowchart shown in Figure 11.

[0071] In the second embodiment, steps S40 and S80 of the flowchart in Figure 11 differ from those in the first embodiment (flowchart in Figure 4).

[0072] Specifically, in step S40, a control signal indicating that a down DR is being received is output to the switching control unit 503 of the changeover switch 50. In addition, a control signal indicating an instruction to switch to independent operation mode is output to the power conditioner 35.

[0073] When the power conditioner 35 switches to independent operation mode, the voltage of the energy storage system 3 is output to the second terminal 521 of the second circuit section 52.

[0074] As a result, while receiving a down DR (more specifically, a control signal indicating that a down DR is being received), the voltage of the energy storage system 3 is input to the second terminal 521 of the second circuit section 52. Accordingly, the switching control unit 503 controls the switching switch 50 so that it enters a state where commercial power is not supplied ST2 (Figure 13) (step S5).

[0075] In step S80, a control signal instructing a switch to the commercial power supply state ST1 is output to the switching control unit 503 of the changeover switch 50. In addition, a control signal indicating a switch to the normal operation mode is output to the power conditioner 35.

[0076] The switching control unit 503 controls the switching switch 50 so that it enters the commercial power supply state ST1 (step S9). The power conditioner 35 also returns to normal operation mode.

[0077] According to the second embodiment described above, it is possible to reliably suppress the consumption of commercial power in response to demand for reduced demand, similar to the first embodiment. In addition, the other effects described in the first embodiment can also be obtained.

[0078] Furthermore, according to the second embodiment described above, since it is not necessary to provide a remote control switch 7, the system configuration of the power supply system 1 can be simplified.

[0079] <3. Variant> The switchgear-integrated panel and power supply system according to the present invention are not limited to the embodiments described above, and various modifications and improvements are possible within the scope of the claims.

[0080] For example, in the embodiments described above, the commercial power system 2 and the load system 4 are electrically disconnected when the remaining charge of the storage battery 33 is above a threshold, but the system is not limited to this. The system may be configured so that the commercial power system 2 and the load system 4 are electrically disconnected regardless of the remaining charge of the storage battery 33.

[0081] In that case, when the battery charge of the storage battery 33 reaches zero, the changeover switch 50 should be controlled so that it returns to the commercial power supply state ST1, thereby reconnecting the commercial power supply system 2 and the load system 4 electrically.

[0082] Furthermore, in the embodiments described above, steps S10 and S11 in Figures 4 and 11 illustrate the case in which, after the reduction DR is canceled, the amount of electricity used for the power of the energy storage system 3 consumed in response to the reduction DR request is transmitted to the aggregator 6, but the embodiment is not limited to this. If no compensation is given to the consumer, steps S10 and S11 in Figures 4 and 11 may be omitted. [Explanation of symbols]

[0083] 1. Power supply system 2 Commercial power system 3 Energy storage system 4 Load system 5. Automatic power switch 6 Aggregators 7. Remote control switch 21 Commercial power supply 31. Solar power generation equipment 33 Storage batteries 35 Power Conditioner 41 Load 50 Changeover switch 51 1st circuit section 52 2nd circuit section 53 Relay Circuit Section 54 Load circuit section 71 Command receiving unit 73 Switching control unit 75 Battery level measurement unit 351 Command Receiving Unit 500 Changeover Switch 501 Command Receiving Unit 502 Power consumption measuring section 503 Switching Control Unit 504 Transmitter 505 Battery level measurement unit 511 1st terminal section 521 2nd terminal section ST1 Commercial power supply status ST2 Commercial power outage

Claims

1. Commercial power systems, including commercial power, A power generation system and a battery storage system, A load system including the load, A power automatic transfer panel including a changeover switch electrically connected to each of the commercial power system, the energy storage system, and the load system, which switches the connection state between the commercial power system and the load system and also switches the connection state between the energy storage system and the load system, Aggregators that trigger a downward DR (Demand Response), A command receiving unit that receives the down DR from the aggregator via the network, Equipped with, The power supply system is characterized in that the changeover switch electrically disconnects the commercial power system from the load system and electrically connects the energy storage system from the load system, provided that the command receiving unit receives the down DR.

2. A first circuit section including a first terminal electrically connected to the commercial power supply system and the changeover switch, A second circuit section including a second terminal electrically connected to the energy storage system and the changeover switch, A power conditioner that can switch between a normal operation mode that outputs voltage to the first terminal and an independent operation mode that outputs voltage to the second terminal, Furthermore, A remote control switch, including the command receiving unit, is provided between the commercial power supply system and the first circuit unit. The remote-controlled switch electrically disconnects the commercial power system and the changeover switch while the command receiving unit receives the down DR, thereby cutting off the power supply from the commercial power system. The power conditioner switches to the self-sustaining operation mode while the power supply from the commercial power grid is interrupted. The power supply system according to claim 1, characterized in that the changeover switch electrically disconnects the commercial power supply system and the load system in response to a voltage being input to the second terminal, and electrically connects the energy storage system and the load system.

3. A first circuit section including a first terminal electrically connected to the commercial power supply system and the changeover switch, A second circuit section including a second terminal electrically connected to the energy storage system and the changeover switch, A power conditioner that can switch between a normal operation mode that outputs voltage to the first terminal and an independent operation mode that outputs voltage to the second terminal, Furthermore, The command receiving unit comprises a first command receiving unit provided in the power conditioner and a second command receiving unit provided in the changeover switch. The power conditioner switches to the self-contained operation mode while the first command receiving unit receives the down DR. The power supply system according to claim 1, characterized in that the changeover switch electrically disconnects the commercial power system from the load system and electrically connects the energy storage system from the load system when a voltage is input to the second terminal while the second command receiving unit is receiving the down DR.

4. The system further includes a battery level measuring unit for measuring the remaining battery level of the aforementioned storage battery, The power supply system according to any one of 1 to 3, wherein the changeover switch electrically disconnects the commercial power supply system and the load system, and electrically connects the energy storage system and the load system, with the additional condition that the battery level is above a threshold.

5. The aforementioned changeover switch is, A power consumption measuring unit for measuring the amount of power used in the energy storage system associated with the aforementioned power reduction DR, A transmitting unit that transmits the amount of power used to the aggregator, A power supply system according to any one of claims 1 to 3, characterized by comprising the above.

6. A changeover switch electrically connected to each of a commercial power system including a commercial power source, a power generation device and a battery storage system including a battery, and a load system including a load, the changeover switch switches the connection state between the commercial power system and the load system, and also switches the connection state between the battery storage system and the load system, A command receiving unit that receives a downward DR (Demand Response) issued by the aggregator, Equipped with, The aforementioned changeover switch is characterized in that, on the condition that the command receiving unit receives the down DR, it electrically disconnects the commercial power supply system from the load system and electrically connects the energy storage system from the load system.

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