Photovoltaic energy storage grid-connected circuit

Abstract

The utility model provides a kind of photovoltaic energy storage grid-connected circuit, comprising: main line, photovoltaic panel group, first grid-connected cabinet, second grid-connected cabinet, transformer equipment group, energy storage equipment group, low-voltage power distribution room and power equipment group;The electrical energy output end of photovoltaic panel group is connected with the electrical energy input end circuit of first grid-connected cabinet;The electrical energy output end of first grid-connected cabinet is connected with the first access point circuit of main line;The electrical energy input end of low-voltage power distribution room is connected with the second access point circuit of main line;The electrical energy output end of low-voltage power distribution room is connected with the circuit of power equipment group;The electrical energy end of second grid-connected cabinet is connected with the third access point circuit of main line;The energy storage end of second grid-connected cabinet is connected with the circuit of energy storage equipment group;The electrical energy end of transformer equipment group is connected with the fourth access point circuit of main line;Through main line, photovoltaic panel group, first grid-connected cabinet, second grid-connected cabinet, transformer, energy storage equipment group, low-voltage power distribution room and power equipment group collaborative operation, the stable operation of photovoltaic energy storage grid-connected circuit is ensured.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic energy storage technology, and in particular to a photovoltaic energy storage grid-connected circuit. Background Technology

[0002] Grid-connected photovoltaic (PV) circuits convert solar energy into direct current (DC) through PV modules, which is then converted into alternating current (AC) that meets the grid frequency, voltage, and waveform requirements by an inverter, and finally connected to the public grid through the grid connection point. Distributed PV reduces users' electricity costs through "net metering," while centralized power plants enjoy green electricity premiums. Experiments have shown that every 1MW of PV system reduces carbon emissions by approximately 1600 tons per year, contributing to the achievement of "dual carbon" goals. However, with the increasing proportion of renewable energy sources such as PV, the internal instability of PV equipment and energy storage systems can easily lead to conflicts, causing grid-connected energy storage systems with PV to malfunction.

[0003] However, there is currently no effective circuit to ensure the normal operation of photovoltaic energy storage systems; therefore, there is an urgent need for a grid-connected circuit that can stabilize the internal circuits of photovoltaic equipment and energy storage systems to ensure the normal operation of photovoltaic energy storage systems. Utility Model Content

[0004] This utility model aims to at least solve the technical problems existing in the prior art, and in particular, it innovatively proposes a photovoltaic energy storage grid-connected circuit.

[0005] To achieve the above-mentioned objectives of this utility model, this utility model provides a photovoltaic energy storage grid-connected circuit, comprising:

[0006] The main line, photovoltaic panel group, first grid-connected cabinet and photovoltaic grid-connected control circuit installed in the first grid-connected cabinet, second grid-connected cabinet and energy storage grid-connected control circuit and energy storage equipment group installed in the second grid-connected cabinet;

[0007] The power output terminal of the photovoltaic panel array is connected to the power input terminal of the photovoltaic grid-connected control circuit;

[0008] The power output terminal of the photovoltaic grid-connected control circuit is connected to the first access point circuit of the main line;

[0009] The power supply end of the energy storage grid-connected control circuit is connected to the third access point circuit of the main line;

[0010] The energy storage terminal of the energy storage grid-connected control circuit is connected to the energy storage equipment group.

[0011] In a preferred embodiment of this utility model, the photovoltaic grid-connected control circuit includes: a grid-connected control circuit and at least one photovoltaic power supply circuit;

[0012] The photovoltaic power supply circuit includes: the power output terminal of the photovoltaic panel assembly is connected to the power input terminal of the inverter; the three-phase power output terminal of the inverter is connected to the three-phase power input terminal of the molded case circuit breaker; and the three-phase power output terminal of the molded case circuit breaker is connected to the power connection line; wherein, the photovoltaic panel assembly includes at least one photovoltaic panel.

[0013] The grid-connected control circuit includes: the three-phase power input terminal of the safety measure control circuit is connected to the power connection line; the three-phase power output terminal of the safety measure control circuit is connected to the three-phase power input terminal of the second molded case circuit breaker; the three-phase power output terminal of the second molded case circuit breaker is connected to the three-phase power input terminal of the third molded case circuit breaker; and the three-phase power output terminal of the third molded case circuit breaker is connected to the first access point circuit of the main line.

[0014] In a preferred embodiment of this utility model, the safety control circuit includes: the three-phase power input terminal of the first molded case circuit breaker is connected to the power connection line, and the three-phase power output terminal of the first molded case circuit breaker is connected to the three-phase power input terminal of the second molded case circuit breaker.

[0015] One end of the A-phase coil of the first current transformer is connected to the current signal terminal C01 of the anti-islanding device; one end of the B-phase coil of the first current transformer is connected to the current signal terminal C03 of the anti-islanding device; and one end of the C-phase coil of the first current transformer is connected to the current signal terminal C05 of the anti-islanding device. The current signal terminal C02 of the anti-islanding device is connected to and grounded with the current signal terminals C04 and C06 of the anti-islanding device, the other ends of the A-phase coil, the B-phase coil, and the C-phase coil of the first current transformer.

[0016] The voltage signal terminal C09 of the anti-islanding device is connected to the first terminal of the first circuit of the fourth miniature circuit breaker, and the second terminal of the first circuit of the fourth miniature circuit breaker is connected to the A-phase line of the three-phase power input terminal of the first molded case circuit breaker; the voltage signal terminal C10 of the anti-islanding device is connected to the first terminal of the second circuit of the fourth miniature circuit breaker, and the second terminal of the second circuit of the fourth miniature circuit breaker is connected to the B-phase line of the three-phase power input terminal of the first molded case circuit breaker; the voltage signal terminal C11 of the anti-islanding device is connected to the first terminal of the third circuit of the fourth miniature circuit breaker, and the second terminal of the third circuit of the fourth miniature circuit breaker is connected to the C-phase line of the three-phase power input terminal of the first molded case circuit breaker.

[0017] The first terminal of the first circuit of the seventh miniature circuit breaker is connected to the positive terminal of the UPS power supply; the second terminal of the first circuit of the seventh miniature circuit breaker is connected to the positive terminal A23 of the anti-islanding device, the positive terminal P1 of the first molded case circuit breaker, and the auxiliary terminal F11 of the first molded case circuit breaker; the common terminal A01 of the anti-islanding device is connected to one end of the normally open contact of the intermediate relay, one end of the normally closed contact of the intermediate relay, the distal end of the first knob, and the first end of the first pressure plate; the other end of the normally closed contact of the intermediate relay is connected to the switch position terminal of the anti-islanding device. A03 connection, the other end of the normally open contact of the intermediate relay is connected to the closed position terminal A02 of the anti-islanding device; the local terminal of the first knob is connected to the remote / local terminal A10 of the anti-islanding device, the second end of the first pressure plate is connected to the closing interlock terminal A13 of the anti-islanding device; the negative power supply terminal A24 of the anti-islanding device is connected to the first terminal of the second circuit of the seventh miniature circuit breaker, the common terminal A16 of the anti-islanding device is connected to the remote control common terminal A19 of the anti-islanding device and the second terminal of the second knob, the first... The third terminal of the second knob is connected to the common control terminal S1 of the first molded case circuit breaker; the fourth terminal of the second knob is connected to the first terminal of the trip button and the first terminal of the close button; the second terminal of the trip button is connected to the trip signal acquisition terminal S2 of the first molded case circuit breaker and the second terminal of the second pressure plate; the first terminal of the second pressure plate is connected to the trip output terminal A15 of the anti-islanding device and the remote trip terminal A18 of the anti-islanding device; the second terminal of the close button is connected to the close signal acquisition terminal S4 of the first molded case circuit breaker and the second terminal of the third pressure plate. The first end of the third pressure plate is connected to the closing output terminal A14 of the anti-islanding device and the remote closing terminal A17 of the anti-islanding device; the auxiliary terminal F14 of the first molded case circuit breaker is connected to the positive terminal of the coil of the intermediate relay; the auxiliary terminal F14 of the first molded case circuit breaker is connected to the first end of the indicator light; the negative terminal of the coil of the intermediate relay is connected to the second end of the indicator light, the negative power supply terminal P2 of the first molded case circuit breaker, and the first end of the second circuit of the seventh miniature circuit breaker; the second end of the second circuit of the seventh miniature circuit breaker is connected to the negative power supply terminal of the UPS.

[0018] In a preferred embodiment of this utility model, the energy storage grid-connected control circuit includes: the three-phase power input terminal of the disconnecting switch is connected to the third access point of the main line, the three-phase power output terminal of the disconnecting switch is connected to the three-phase power input terminal of the sixth molded case circuit breaker, and the three-phase power output terminal of the sixth molded case circuit breaker is connected to the power input terminal of the energy storage equipment group.

[0019] In a preferred embodiment of this utility model, it further includes:

[0020] Low-voltage power distribution room, electrical equipment group and transformer equipment group;

[0021] The power supply terminal of the low-voltage distribution room is connected to the second access point of the main line circuit;

[0022] The power input terminal of the electrical equipment group is connected to the power output terminal of the low-voltage power distribution room via a circuit.

[0023] The power terminal of the transformer equipment group is connected to the fourth access point of the main line.

[0024] In a preferred embodiment of this utility model, the intermediate relay model is JZC4-22AC220V.

[0025] In a preferred embodiment of this utility model, the anti-islanding device is model number WD300AC220V.

[0026] In summary, due to the adoption of the above technical solutions, the beneficial effects of this utility model are: the photovoltaic panel converts light energy into electrical energy, the inverter converts DC power into AC power, and the three-phase power generated by the inverter is safely and stably transmitted to the main line through the first molded case circuit breaker and anti-islanding equipment; the energy storage equipment group can store the surplus power and release it for use during peak electricity consumption periods.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 This is a schematic diagram of a photovoltaic energy storage grid-connected circuit.

[0030] Figure 2 This is a schematic diagram of the first grid-connected cabinet circuit of the photovoltaic energy storage grid-connected circuit.

[0031] Figure 3 This is a schematic diagram of the second grid-connected cabinet circuit for photovoltaic energy storage grid connection.

[0032] Figure 4 This is a partial circuit diagram of the safety control circuit.

[0033] Figure 5 This is a partial circuit diagram of the safety control circuit. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] like Figures 1-5 As shown, this utility model discloses a photovoltaic energy storage grid-connected circuit, wherein the schematic diagram of the photovoltaic energy storage grid-connected circuit is as follows:

[0036] This includes: main line, photovoltaic panel group, first grid-connected cabinet, second grid-connected cabinet, transformer equipment group, energy storage equipment group, low-voltage power distribution room and electrical equipment group;

[0037] The power output terminal of the photovoltaic panel array is connected to the power input terminal of the first grid-connected cabinet.

[0038] The power output terminal of the first grid-connected cabinet is connected to the circuit of the first access point of the main line;

[0039] The power input terminal of the low-voltage distribution room is connected to the second access point circuit of the main line;

[0040] The power output terminal of the low-voltage power distribution room is connected to the circuit of the electrical equipment group;

[0041] The power supply terminal of the second grid-connected cabinet is connected to the third access point of the main line.

[0042] The energy storage terminal of the second grid-connected cabinet is connected to the circuit of the energy storage equipment group;

[0043] The power supply terminal of the transformer equipment group is connected to the fourth access point of the main line.

[0044] Photovoltaic panels convert solar energy into direct current (DC) power. The first grid-connected cabinet uses an inverter to convert the DC power from photovoltaic panels into alternating current (AC) power and connects to the main line to access the power grid. The low-voltage distribution room is responsible for power distribution and management. The second grid-connected cabinet is mainly responsible for the power exchange between the energy storage equipment group and the power grid. The energy storage equipment group is mainly composed of lithium iron phosphate batteries, which are used to store electricity during periods of surplus and release electricity during periods of insufficient sunlight or peak electricity consumption to balance supply and demand fluctuations and improve system stability.

[0045] like Figure 2 , 4 As shown in Figure 5, this utility model discloses a photovoltaic energy storage grid-connected circuit, wherein the schematic diagram of the first grid-connected cabinet circuit is as follows:

[0046] Includes: grid-connected control circuit and at least one photovoltaic power supply circuit;

[0047] The photovoltaic power supply circuit includes: the power output terminal of the photovoltaic panel assembly is connected to the power input terminal of the inverter; the three-phase power output terminal of the inverter is connected to the three-phase power input terminal of the molded case circuit breaker; and the three-phase power output terminal of the molded case circuit breaker is connected to the power connection line; wherein, the photovoltaic panel assembly includes at least one photovoltaic panel.

[0048] The grid-connected control circuit includes: the three-phase power input terminal of the safety measure control circuit is connected to the power connection line; the three-phase power output terminal of the safety measure control circuit is connected to the three-phase power input terminal of the second molded case circuit breaker 19; the three-phase power output terminal of the second molded case circuit breaker 19 is connected to the three-phase power input terminal of the third molded case circuit breaker 24; and the three-phase power output terminal of the third molded case circuit breaker 24 is connected to the first access point circuit of the main line.

[0049] The safety control circuit includes: the three-phase power input terminal of the first molded case circuit breaker 18 is connected to the power connection line, and the three-phase power output terminal of the first molded case circuit breaker 18 is connected to the three-phase power input terminal of the second molded case circuit breaker 19.

[0050] One end of the phase coil of the first current transformer 20A is connected to the current signal terminal C01 of the anti-islanding device 88; one end of the phase coil of the first current transformer 20B is connected to the current signal terminal C03 of the anti-islanding device 88; and one end of the phase coil of the first current transformer 20C is connected to the current signal terminal C05 of the anti-islanding device 88. The current signal terminal C02 of the anti-islanding device 88 is connected to and grounded to the current signal terminals C04 and C06 of the anti-islanding device 88, the other end of the phase coils of the first current transformer 20A, the other end of the phase coils of the first current transformer 20B, and the other end of the phase coil of the first current transformer 20C.

[0051] The voltage signal terminal C09 of the anti-islanding device 88 is connected to the first terminal of the first circuit 61 of the fourth miniature circuit breaker, and the second terminal of the first circuit 61 of the fourth miniature circuit breaker is connected to the A-phase line of the three-phase power input terminal of the first molded case circuit breaker 18; the voltage signal terminal C10 of the anti-islanding device 88 is connected to the first terminal of the second circuit 62 of the fourth miniature circuit breaker, and the second terminal of the second circuit 62 of the fourth miniature circuit breaker is connected to the B-phase line of the three-phase power input terminal of the first molded case circuit breaker 18; the voltage signal terminal C11 of the anti-islanding device 88 is connected to the first terminal of the third circuit 63 of the fourth miniature circuit breaker, and the second terminal of the third circuit 63 of the fourth miniature circuit breaker is connected to the C-phase line of the three-phase power input terminal of the first molded case circuit breaker 18.

[0052] The first terminal of the first circuit of the seventh miniature circuit breaker 66 is connected to the positive terminal of the UPS power supply; the second terminal of the first circuit of the seventh miniature circuit breaker 66 is connected to the positive terminal A23 of the anti-islanding device 88, the positive terminal P1 of the first molded case circuit breaker 18, and the auxiliary terminal F11 of the first molded case circuit breaker 18; the common terminal A01 of the anti-islanding device 88 is connected to one end of the normally open contact of the intermediate relay 46, one end of the normally closed contact of the intermediate relay 46, the remote terminal of the first knob 48, and the first end of the first pressure plate 49; the other end of the normally closed contact of the intermediate relay 46 is connected to the switch position A of the anti-islanding device 88. 03 Connection: The other end of the normally open contact of the intermediate relay 46 is connected to the closed position terminal A02 of the anti-islanding device 88; the local terminal of the first knob 48 is connected to the remote / local terminal A10 of the anti-islanding device 88; the second end of the first pressure plate 49 is connected to the closing interlock terminal A13 of the anti-islanding device 88; the negative power supply terminal A24 of the anti-islanding device 88 is connected to the first terminal of the second circuit of the seventh miniature circuit breaker 66; the common terminal A16 of the anti-islanding device 88 is connected to the remote control common terminal A19 of the anti-islanding device 88 and the second end of the second knob 50; the first end of the second knob 50 is connected to... The third end of the second knob 50 is connected to the common control terminal S1 of the first molded case circuit breaker 18; the fourth end of the second knob 50 is connected to the first end of the trip button 51 and the first end of the close button 53; the second end of the trip button 51 is connected to the trip signal acquisition terminal S2 of the first molded case circuit breaker 18 and the second end of the second pressure plate 52; the first end of the second pressure plate 52 is connected to the trip output terminal A15 of the anti-islanding device 88 and the remote trip terminal A18 of the anti-islanding device 88; the second end of the close button 53 is connected to the close signal acquisition terminal S4 of the first molded case circuit breaker 18 and the second end of the third pressure plate 54. Connect the first end of the third pressure plate 54 to the closing output terminal A14 and the remote closing terminal A17 of the anti-islanding device 88; connect the auxiliary terminal F14 of the first molded case circuit breaker 18 to the positive terminal of the coil of the intermediate relay 46; connect the auxiliary terminal F14 of the first molded case circuit breaker 18 to the first end of the indicator light 56; connect the negative terminal of the coil of the intermediate relay 46 to the second end of the indicator light 56, the negative power supply terminal P2 of the first molded case circuit breaker 18, and the first end of the second circuit of the seventh miniature circuit breaker 66; connect the second end of the second circuit of the seventh miniature circuit breaker 66 to the negative power supply terminal of the UPS.

[0053] It also includes a surge protection circuit, comprising: the energy input terminal of the first surge protector 17 is connected to the power output terminal of the fourth molded case circuit breaker 26; the power input terminal of the fourth molded case circuit breaker 26 is connected to the power connection line; and the grounding terminal of the first surge protector 17 is grounded.

[0054] The anti-islanding device 88 connects to the first current transformer 20 via its current signal terminals C01 to C06 to collect three-phase current, and connects to the sixth miniature circuit breaker via its voltage signal terminals C09 to C11 to collect output voltage; this enables the determination of operating conditions to switch the first molded case circuit breaker on or off; specifically including:

[0055] The positive power terminal A23 and negative power terminal A24 of the anti-islanding device 88, as well as the positive power terminal P1 and negative power terminal P2 of the first molded case circuit breaker 18, are connected to the uninterruptible power supply UPS through the seventh miniature circuit breaker 66, which can provide a stable power supply for the anti-islanding device 88 and the first molded case circuit breaker 18.

[0056] Rotate the second knob 50 so that its third end connects with its fourth end, switching to manual mode. When manual operation or equipment maintenance is required, simply press the trip button 51. The signal from the common control terminal S1 of the first molded case circuit breaker 18 is transmitted through the trip button 51 to the trip signal acquisition terminal S2 of the first molded case circuit breaker 18, and the first molded case circuit breaker 18 trips. When closing is required, simply press the close button 53. The signal from the common control terminal S1 of the first molded case circuit breaker 18 is transmitted through the close button 53 to the close signal acquisition terminal S2 of the first molded case circuit breaker 18, and the first molded case circuit breaker 18 closes.

[0057] Rotate the second knob 50 so that its first end connects with its second end. The signal from the common control terminal S1 of the first molded case circuit breaker 18 is transmitted through the second knob 50 to the common terminal A16 of the anti-islanding device 88 and the common terminal A19 of the remote control of the anti-islanding device 88. At this time, the system switches to automatic mode. When the first knob 48 is rotated to the local terminal, if it is determined that the circuit breaker needs to be opened on-site, a signal is sent through the opening output terminal A15 of the anti-islanding device 88 and transmitted through the second pressure plate 52 to the opening signal acquisition terminal S2 of the first molded case circuit breaker 18, and the first molded case circuit breaker 18 opens. Conversely, if it is determined that the circuit breaker needs to be closed on-site, a signal is sent through the closing output terminal A14 of the anti-islanding device 88 and transmitted through the third pressure plate 54 to the closing signal acquisition terminal S4 of the first molded case circuit breaker 18, and the first molded case circuit breaker 18 closes.

[0058] Rotate the second knob 50 so that its first end connects with its second end. The signal from the common control terminal S1 of the first molded case circuit breaker 18 is transmitted through the second knob 50 to the common terminal A16 of the anti-islanding device 88 and the common terminal A19 of the remote control of the anti-islanding device 88. At this time, the system switches to automatic mode. When the first knob 48 is rotated to the far end, if it is determined that remote tripping is required, a signal is sent through the remote tripping terminal A18 of the anti-islanding device 88 and transmitted through the second pressure plate 52 to the tripping signal acquisition terminal S2 of the first molded case circuit breaker 18, and the first molded case circuit breaker 18 trips. Conversely, if it is determined that remote closing is required, a signal is sent through the remote closing terminal A17 of the anti-islanding device 88 and transmitted through the third pressure plate 54 to the closing signal acquisition terminal S4 of the first molded case circuit breaker 18, and the first molded case circuit breaker 18 closes.

[0059] Regardless of whether it is in automatic or manual mode, when the first molded case circuit breaker 18 is closed, its auxiliary terminals F14 and F11 are connected, energizing the coil of its intermediate relay 46. At this time, the normally closed contact of the intermediate relay 46 changes from normally closed to open, and the normally open contact changes from normally open to closed. The closing terminal A02 of the anti-islanding device 88 receives the closing signal, indicating that the first molded case circuit breaker 18 is closed. Simultaneously, the indicator light 56 ​​illuminates red, providing feedback to the first molded case circuit breaker 18. When the circuit breaker is in the closed state, similarly, when the first molded case circuit breaker 18 is in the open state, the auxiliary terminals F14 and F11 of the first molded case circuit breaker 18 are in the open state. At this time, the coil of the intermediate relay 46 is de-energized, the normally open contact of the intermediate relay 46 is in the open state, and the normally closed contact of the intermediate relay 46 is in the closed state. The switch open terminal A03 of the anti-islanding device 88 collects the open signal, indicating that the first molded case circuit breaker 18 is open. At the same time, the indicator light 56 ​​goes out and the light cover of the indicator light 56 ​​turns green, indicating that the first molded case circuit breaker 18 is in the open state.

[0060] like Figure 3 As shown, this utility model discloses a photovoltaic energy storage grid-connected circuit, wherein the schematic diagram of the second grid-connected cabinet circuit is as follows:

[0061] This includes: the three-phase power input terminal of the disconnecting switch 30 is connected to the third access point of the main line; the three-phase power output terminal of the disconnecting switch 30 is connected to the three-phase power input terminal of the sixth molded case circuit breaker 31; and the three-phase power output terminal of the sixth molded case circuit breaker 31 is connected to the power input terminal of the energy storage equipment group. It may also include the following: the three-phase power output terminal of the disconnecting switch 30 is connected to the three-phase power input terminal of the fifth molded case circuit breaker 35 and the three-phase power input terminal of the first miniature circuit breaker 32; the three-phase power output terminal of the fifth molded case circuit breaker 35 is connected to the energy input terminal of the second surge protector 60; the grounding terminal of the second surge protector 60 is grounded; the three-phase power output terminal of the first miniature circuit breaker 32 is connected to the energy input terminal of the third energy meter 3; the energy output terminal of the third energy meter 3 is connected to the three-phase power input terminals of the second miniature circuit breaker 33 and the third miniature circuit breaker 34; and the three-phase power output terminals of the second miniature circuit breaker 33 and the third miniature circuit breaker 34 are connected to an external power supply circuit.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic energy storage grid-connected circuit, characterized in that, include: The main line, photovoltaic panel group, first grid-connected cabinet and photovoltaic grid-connected control circuit installed in the first grid-connected cabinet, second grid-connected cabinet and energy storage grid-connected control circuit and energy storage equipment group installed in the second grid-connected cabinet; The power output terminal of the photovoltaic panel array is connected to the power input terminal of the photovoltaic grid-connected control circuit; The power output terminal of the photovoltaic grid-connected control circuit is connected to the first access point circuit of the main line; The power supply end of the energy storage grid-connected control circuit is connected to the third access point circuit of the main line; The energy storage terminal of the energy storage grid-connected control circuit is connected to the energy storage equipment group.

2. The photovoltaic energy storage grid-connected circuit according to claim 1, characterized in that, The photovoltaic grid-connected control circuit includes: a grid-connected control circuit and at least one photovoltaic power supply circuit; The photovoltaic power supply circuit includes: the power output terminal of the photovoltaic panel assembly is connected to the power input terminal of the inverter; the three-phase power output terminal of the inverter is connected to the three-phase power input terminal of the molded case circuit breaker; and the three-phase power output terminal of the molded case circuit breaker is connected to the power connection line; wherein, the photovoltaic panel assembly includes at least one photovoltaic panel. The grid-connected control circuit includes: the three-phase power input terminal of the safety measure control circuit is connected to the power connection line; the three-phase power output terminal of the safety measure control circuit is connected to the three-phase power input terminal of the second molded case circuit breaker (19); the three-phase power output terminal of the second molded case circuit breaker (19) is connected to the three-phase power input terminal of the third molded case circuit breaker (24); and the three-phase power output terminal of the third molded case circuit breaker (24) is connected to the first access point circuit of the main line.

3. A photovoltaic energy storage grid-connected circuit according to claim 2, characterized in that, The safety control circuit includes: the three-phase power input terminal of the first molded case circuit breaker (18) is connected to the power connection line, and the three-phase power output terminal of the first molded case circuit breaker (18) is connected to the three-phase power input terminal of the second molded case circuit breaker (19). One end of the A-phase coil of the first current transformer (20) is connected to the current signal terminal C01 of the anti-islanding device (88); one end of the B-phase coil of the first current transformer (20) is connected to the current signal terminal C03 of the anti-islanding device (88); one end of the C-phase coil of the first current transformer (20) is connected to the current signal terminal C05 of the anti-islanding device (88); the current signal terminal C02 of the anti-islanding device (88) is connected to the current signal terminals C04 and C06 of the anti-islanding device (88), the other end of the A-phase coil of the first current transformer (20), the other end of the B-phase coil of the first current transformer (20), and the other end of the C-phase coil of the first current transformer (20) and grounded. The voltage signal terminal C09 of the anti-islanding device (88) is connected to the first terminal of the first circuit (61) of the fourth miniature circuit breaker, and the second terminal of the first circuit (61) of the fourth miniature circuit breaker is connected to the A-phase line of the three-phase power input terminal of the first molded case circuit breaker (18); the voltage signal terminal C10 of the anti-islanding device (88) is connected to the first terminal of the second circuit (62) of the fourth miniature circuit breaker, and the second terminal of the second circuit (62) of the fourth miniature circuit breaker is connected to the B-phase line of the three-phase power input terminal of the first molded case circuit breaker (18); the voltage signal terminal C11 of the anti-islanding device (88) is connected to the first terminal of the third circuit (63) of the fourth miniature circuit breaker, and the second terminal of the third circuit (63) of the fourth miniature circuit breaker is connected to the C-phase line of the three-phase power input terminal of the first molded case circuit breaker (18); The first terminal of the first circuit of the seventh miniature circuit breaker (66) is connected to the positive terminal of the UPS power supply. The second terminal of the first circuit of the seventh miniature circuit breaker (66) is connected to the positive terminal A23 of the anti-islanding device (88), the positive terminal P1 of the first molded case circuit breaker (18), and the auxiliary terminal F11 of the first molded case circuit breaker (18). The common terminal A01 of the anti-islanding device (88) is connected to one end of the normally open contact of the intermediate relay (46), one end of the normally closed contact of the intermediate relay (46), the far end of the first knob (48), and the first end of the first pressure plate (49). The other end of the normally closed contact of the intermediate relay (46) is connected to the switch position terminal A0 of the anti-islanding device (88).

3. The other end of the normally open contact of the intermediate relay (46) is connected to the switch closing terminal A02 of the anti-islanding device (88); the local terminal of the first knob (48) is connected to the remote / local terminal A10 of the anti-islanding device (88); the second end of the first pressure plate (49) is connected to the closing interlock terminal A13 of the anti-islanding device (88); the negative power supply terminal A24 of the anti-islanding device (88) is connected to the first terminal of the second circuit of the seventh miniature circuit breaker (66); the common terminal A16 of the anti-islanding device (88) is connected to the common terminal A19 of the anti-islanding device (88) and the second end of the second knob (50); the first end of the second knob (50) is connected to the second The third end of the knob (50) is connected to the common control terminal S1 of the first molded case circuit breaker (18); the fourth end of the second knob (50) is connected to the first end of the trip button (51) and the first end of the close button (53); the second end of the trip button (51) is connected to the trip signal acquisition terminal S2 of the first molded case circuit breaker (18) and the second end of the second pressure plate (52); the first end of the second pressure plate (52) is connected to the trip output terminal A15 of the anti-islanding device (88) and the remote trip terminal A18 of the anti-islanding device (88); the second end of the close button (53) is connected to the close signal acquisition terminal S4 of the first molded case circuit breaker (18) and the second end of the third pressure plate (54). Connections; the first end of the third pressure plate (54) is connected to the closing output end A14 of the anti-islanding device (88) and the remote closing end A17 of the anti-islanding device (88); the auxiliary end F14 of the first molded case circuit breaker (18) is connected to the positive terminal of the coil of the intermediate relay (46); the auxiliary end F14 of the first molded case circuit breaker (18) is connected to the first end of the indicator light (56); the negative terminal of the coil of the intermediate relay (46) is connected to the second end of the indicator light (56), the negative power supply terminal P2 of the first molded case circuit breaker (18) and the first end of the second circuit of the seventh miniature circuit breaker (66); the second end of the second circuit of the seventh miniature circuit breaker (66) is connected to the negative power supply terminal of the UPS.

4. The photovoltaic energy storage grid-connected circuit according to claim 1, characterized in that, The energy storage grid-connected control circuit includes: the three-phase power input terminal of the disconnecting switch (30) is connected to the third access point of the main line, the three-phase power output terminal of the disconnecting switch (30) is connected to the three-phase power input terminal of the sixth molded case circuit breaker (31), and the three-phase power output terminal of the sixth molded case circuit breaker (31) is connected to the power input terminal of the energy storage equipment group.

5. A photovoltaic energy storage grid-connected circuit according to claim 1, characterized in that, Also includes: Low-voltage power distribution room, electrical equipment group and transformer equipment group; The power supply terminal of the low-voltage distribution room is connected to the second access point of the main line circuit; The power input terminal of the electrical equipment group is connected to the power output terminal of the low-voltage power distribution room via a circuit. The power terminal of the transformer equipment group is connected to the fourth access point of the main line.

6. The photovoltaic energy storage grid-connected circuit according to claim 3, characterized in that, The intermediate relay (46) is model number JZC4-22 AC220V.

7. A photovoltaic energy storage grid-connected circuit according to claim 3, characterized in that, The anti-islanding device model is: WD300 AC220V.

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