Photovoltaic energy storage device and system

Abstract

The utility model provides photovoltaic energy storage equipment and system. The equipment comprises a photovoltaic grid-connected cabinet, a capacitor cabinet, a first outgoing line cabinet, a second outgoing line cabinet, a main cabinet, a transformer, an energy storage grid-connected cabinet, an EMS cabinet, an energy storage cabinet and a main line. The main line is connected with the solar photovoltaic panel and the main cabinet; the main cabinet is in circuit connection with the transformer; the main cabinet is in circuit connection with the energy storage grid-connected cabinet; the energy storage grid-connected cabinet is in circuit connection with the EMS cabinet; the EMS cabinet is in circuit connection with the energy storage cabinet; the photovoltaic grid-connected cabinet is connected with the main line circuit through a first access point; the capacitor cabinet is connected with the main line circuit through a second access point; the first outgoing line cabinet is connected with the main line circuit through a third access point; the first outgoing line cabinet is in circuit connection with the electric equipment group; the second outgoing line cabinet is connected with the main line circuit through a fourth access point; and the second outgoing line cabinet is in circuit connection with the electric equipment group, so that the problem of cooperation conflict between the photovoltaic equipment and the energy storage system is solved.

Description

Technical Field

[0001] The utility model relates to the field of energy storage, and in particular to a photovoltaic energy storage device and system. Background Art

[0002] Energy storage systems significantly enhance the flexibility and reliability of power systems by storing and releasing electrical energy, playing a key role in promoting the large-scale grid integration and consumption of renewable energy. However, with the increasing proportion of renewable energy sources such as photovoltaics, conflicts have arisen between the coordination of photovoltaic equipment and energy storage systems, resulting in the inability of energy storage systems with photovoltaics to operate properly.

[0003] However, there is currently no effective photovoltaic energy storage system to address the conflict between photovoltaic equipment and energy storage systems. Therefore, there is an urgent need for a photovoltaic energy storage system that can address the conflict between photovoltaic equipment and energy storage systems to ensure the normal operation of photovoltaic energy storage systems. Utility Model Content

[0004] The present application provides a photovoltaic energy storage device and system to solve the problem of conflict between photovoltaic devices and energy storage systems, and ensure the normal operation of the photovoltaic energy storage system.

[0005] In a first aspect, the present invention provides a photovoltaic energy storage device, comprising:

[0006] Photovoltaic grid-connected cabinet (101), capacitor cabinet (102), first outgoing line cabinet (103), second outgoing line cabinet (104), main cabinet (105), transformer (106), energy storage grid-connected cabinet (107), energy management system EMS cabinet (108), energy storage cabinet (109) and main line (110);

[0007] One end of the main line (110) is connected to the output end of the solar photovoltaic panel (20), and the other end of the main line (110) is connected to the first end of the main cabinet (105);

[0008] The second end of the main cabinet (105) is connected to the transformer (106) in a circuit;

[0009] A third end of the main cabinet (105) is connected to one end of the energy storage grid cabinet (107) in a circuit;

[0010] The other end of the energy storage grid cabinet (107) is connected to one end of the EMS cabinet (108) by a circuit;

[0011] The other end of the EMS cabinet (108) is connected to the energy storage cabinet (109) by a circuit;

[0012] The photovoltaic grid-connected cabinet (101) is connected to the main line (110) circuit via a first access point;

[0013] The capacitor cabinet (102) is connected to the main line (110) circuit via a second access point;

[0014] The input end of the first outlet cabinet (103) is connected to the main line (110) circuit via a third access point;

[0015] The output end of the first outlet cabinet (103) is connected to the electrical equipment group (30);

[0016] The input end of the second outlet cabinet (104) is connected to the main line (110) circuit via a fourth access point;

[0017] The output end of the second outlet cabinet (104) is connected to the electrical equipment group (30) via a circuit.

[0018] In a possible design, the photovoltaic grid-connected cabinet (101) comprises: a first isolator (1011), a first molded case circuit breaker (1012) and a photovoltaic energy storage device (1013); one end of the first isolator (1011) is connected to the main line (110) circuit via a first access point; the other end of the first isolator (1011) is connected to one end of the first molded case circuit breaker (1012); and the other end of the first molded case circuit breaker (1012) is connected to the photovoltaic energy storage device (1013).

[0019] In a possible design, the capacitor cabinet (102) includes: a second isolator (1021), a first three-coil current transformer (1022), a first low-voltage lightning arrester (1023), a second molded case circuit breaker (1024), a first spring returner (1025) and a capacitor (1026); one end of the second isolator (1021) is connected to the main line (110) circuit through a second access point; the other end of the second isolator (1021) is connected to the first end of the first three-coil current transformer (1022). The first three-coil current transformer (1022) is circuit-connected to one end of the first molded case circuit breaker (1024); the second end of the first three-coil current transformer (1022) is circuit-connected to the first low-voltage lightning arrester (1023); the third end of the first three-coil current transformer (1022) is circuit-connected to one end of the second molded case circuit breaker (1024); the other end of the second molded case circuit breaker (1024) is circuit-connected to one end of the first spring returner (1025); the other end of the first spring returner (1025) is circuit-connected to the capacitor (1026).

[0020] In a possible design, the first outlet cabinet (103) comprises: a third isolator (1031), a third molded case circuit breaker (1032), a fourth molded case circuit breaker (1033), a first single-coil current transformer (1034), a second single-coil current transformer (1035), a first amplifier (1036) and a second amplifier (1037); the input end of the third isolator (1031) is connected to the main line (110) circuit through a third access point; the output end of the third isolator (1031) is connected to the input end of the third molded case circuit breaker (1032) and the input end of the fourth molded case circuit breaker (1033); the third molded case circuit breaker ( The output end of the first single-coil current transformer (1032) is circuit-connected to the input end of the first single-coil current transformer (1034); the output end of the fourth molded case circuit breaker (1033) is circuit-connected to the input end of the second single-coil current transformer (1035); the output end of the first single-coil current transformer (1034) is circuit-connected to the input end of the first amplifier (1036); the output end of the second single-coil current transformer (1035) is circuit-connected to the input end of the second amplifier (1037); the output end of the first amplifier (1036) and the output end of the second amplifier (1037) are respectively circuit-connected to the electrical equipment group (30).

[0021] In a possible design, the second outlet cabinet (104) includes: a fourth isolator (1041), a fifth molded case circuit breaker (1042), a sixth molded case circuit breaker (1043), a seventh molded case circuit breaker (1044), a third single-coil current transformer (1045), a fourth single-coil current transformer (1046), a fifth single-coil current transformer (1047), a third amplifier (1048), a fourth amplifier (1049), and a fifth amplifier (10410). ); the input end of the fourth isolator (1041) is connected to the main line (110) circuit through a fourth access point; the output end of the fourth isolator (1041) is respectively connected to the input end of the fifth molded case circuit breaker (1042), the input end of the sixth molded case circuit breaker (1043), and the input end of the seventh molded case circuit breaker (1044); the output end of the fifth molded case circuit breaker (1042) is connected to the third single-coil current transformer (1 045); the output end of the sixth molded case circuit breaker (1043) is circuit-connected to the input end of the fourth single-coil current transformer (1046); the output end of the seventh molded case circuit breaker (1044) is circuit-connected to the input end of the fifth single-coil current transformer (1047); the output end of the third single-coil current transformer (1045) is circuit-connected to the input end of the third amplifier (1048); the output end of the fourth single-coil current transformer (1046) is circuit-connected to the input end of the fourth amplifier (1049); the output end of the fifth single-coil current transformer (1047) is circuit-connected to the input end of the fifth amplifier (10410); the output end of the third amplifier (1048), the output end of the fourth amplifier (1049) and the output end of the fifth amplifier (10410) are circuit-connected to the electrical equipment group (30) respectively.

[0022] In a possible design, the main cabinet (105) includes: a vacuum circuit breaker (1051), a current transformer group (1052), a first electric energy meter (1053) and a second low-voltage lightning arrester (1054); the second low-voltage lightning arrester (1054) is connected to the other end of the main line (110); the first end of the current transformer group (1052) is connected to the other end of the main line (110); the second end of the current transformer group (1052) is connected to the first electric energy meter (1053); the third end of the current transformer group (1052) is connected to one end of the energy storage grid cabinet (107); the fourth end of the current transformer group (1052) is connected to one end of the vacuum circuit breaker (1051); and the other end of the vacuum circuit breaker (1051) is connected to the transformer (106).

[0023] In a possible design, the energy storage grid-connected cabinet (107) comprises: an anti-islanding device (1071), a fifth isolator (1072), a second three-coil current transformer (1073), a second electric energy meter (1074), an eighth molded case circuit breaker (1075), a ninth molded case circuit breaker (1076), a socket (1077), a third three-coil current transformer (1078), a tenth molded case circuit breaker (1079) and a third low-voltage lightning arrester (10710); the anti-islanding device (1071) One end of the fifth isolator (1072) is connected to the third end of the current transformer group (1052); one end of the fifth isolator (1072) is connected to the third end of the current transformer group (1052); the other end of the fifth isolator (1072) is connected to one end of the second three-coil current transformer (1073); the first end of the second three-coil current transformer (1073) is connected to the second electric energy meter (1074); the second three-coil current transformer (1074) is connected to the third end of the current transformer group (1052); ... 73), is connected to one end of the eighth molded case circuit breaker (1075); the third end of the second three-coil current transformer (1073) is connected to the first end of the ninth molded case circuit breaker (1076); the other end of the eighth molded case circuit breaker (1075) is connected to the socket (1077); the second end of the ninth molded case circuit breaker (1076) is connected to the other end of the anti-islanding device (1071); the ninth molded case circuit breaker ( 1076), is circuit-connected to the first end of the third three-coil current transformer (1078); the second end of the third three-coil current transformer (1078) is circuit-connected to one end of the tenth molded case circuit breaker (1079); the other end of the tenth molded case circuit breaker (1079) is circuit-connected to the third low-voltage lightning arrester (10710); the third end of the third three-coil current transformer (1078) is circuit-connected to one end of the EMS cabinet (108).

[0024] In a possible design, the EMS cabinet (108) comprises: an eleventh molded case circuit breaker (1081), a twelfth molded case circuit breaker (1082), and a thirteenth molded case circuit breaker (1083); one end of the eleventh molded case circuit breaker (1081) is circuit-connected to the third end of the third three-coil current transformer (1078); the other end of the eleventh molded case circuit breaker (1081) is circuit-connected to one end of the twelfth molded case circuit breaker (1082) and one end of the thirteenth molded case circuit breaker (1083); the other end of the twelfth molded case circuit breaker (1082) and the other end of the thirteenth molded case circuit breaker (1083) are circuit-connected to the energy storage cabinet (109).

[0025] In a possible design, the energy storage cabinet (109) includes: a sixth amplifier (1091), a seventh amplifier (1092), a first energy storage energy block (1093), a second energy storage energy block (1094), a first battery pack (1095) and a second battery pack (1096); one end of the sixth amplifier (1091) is connected to the other end of the twelfth molded case circuit breaker (1082); one end of the seventh amplifier (1092) is connected to the thirteenth molded case circuit breaker (1083) the other end of the sixth amplifier (1091) is circuit-connected to one end of the first energy storage energy block (1093); the other end of the first energy storage energy block (1093) is circuit-connected to the first battery pack (1095); the other end of the seventh amplifier (1092) is circuit-connected to one end of the second energy storage energy block (1094); the other end of the second energy storage energy block (1094) is circuit-connected to the second battery pack (1096).

[0026] In a second aspect, the utility model provides a photovoltaic energy storage system, comprising the photovoltaic energy storage device as described in the first aspect, as well as a solar photovoltaic panel (20) and an electrical equipment group (30);

[0027] The output end of the solar photovoltaic panel (20) is connected to the photovoltaic grid cabinet (101) in a circuit;

[0028] The electrical equipment group (30) is respectively connected to the output end of the first outgoing line cabinet (103) and the output end of the second outgoing line cabinet (104).

[0029] The photovoltaic energy storage device and system provided by the utility model provide electric energy for an electric device group (30) through the cooperation of a solar photovoltaic panel (20), a photovoltaic grid-connected cabinet (101), a capacitor cabinet (102), a first outlet cabinet (103), a second outlet cabinet (104), a main cabinet (105), a transformer (106), an energy storage grid-connected cabinet (107), an energy management system EMS cabinet (108), an energy storage cabinet (109) and a main line (110), thereby solving the problem of conflict between the photovoltaic device and the energy storage system and ensuring the normal operation of the photovoltaic energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0031] Figure 1 A schematic diagram of a photovoltaic energy storage device provided in an embodiment of the present utility model Figure 1 ;

[0032] Figure 2 A schematic diagram of a photovoltaic energy storage device provided in an embodiment of the present utility model Figure 2 ;

[0033] Figure 3 A photovoltaic energy storage system is provided in an embodiment of the present application.

[0034] Reference numerals:

[0035] 10: Photovoltaic energy storage equipment;

[0036] 101: Photovoltaic grid-connected cabinet;

[0037] 1011: first isolator;

[0038] 1012: First molded case circuit breaker;

[0039] 1013: Photovoltaic energy storage;

[0040] 102: capacitor cabinet;

[0041] 1021: second isolator;

[0042] 1022: the first three-coil current transformer;

[0043] 1023: First low voltage arrester;

[0044] 1024: second molded case circuit breaker;

[0045] 1025: first spring returner;

[0046] 1026: capacitor;

[0047] 103: First outlet cabinet;

[0048] 1031: the third isolator;

[0049] 1032: The third molded case circuit breaker;

[0050] 1033: Fourth molded case circuit breaker;

[0051] 1034: first single-coil current transformer;

[0052] 1035: second single-coil current transformer;

[0053] 1036: first amplifier;

[0054] 1037: second amplifier;

[0055] 104: Second outlet cabinet;

[0056] 1041: fourth isolator;

[0057] 1042: Fifth molded case circuit breaker;

[0058] 1043: Sixth molded case circuit breaker;

[0059] 1044: seventh molded case circuit breaker;

[0060] 1045: third single-coil current transformer;

[0061] 1046: fourth single-coil current transformer;

[0062] 1047: Fifth single-coil current transformer;

[0063] 1048: third amplifier;

[0064] 1049: fourth amplifier;

[0065] 10410: fifth amplifier;

[0066] 105: Main counter;

[0067] 1051: vacuum circuit breaker;

[0068] 1052: Current transformer group;

[0069] 1053: first electric energy meter;

[0070] 1054: Second low voltage arrester;

[0071] 106: Transformer;

[0072] 107: Energy storage grid cabinet;

[0073] 1071: Anti-islanding device;

[0074] 1072: fifth isolator;

[0075] 1073: Second and third coil current transformer;

[0076] 1074: second electric energy meter;

[0077] 1075: Eighth Molded Case Circuit Breaker;

[0078] 1076: Ninth Molded Case Circuit Breaker;

[0079] 1077: socket;

[0080] 1078: Third three-coil current transformer;

[0081] 1079: 10th Molded Case Circuit Breaker;

[0082] 10710: The third low voltage arrester;

[0083] 108: Energy management system EMS cabinet;

[0084] 1081: 11th Molded Case Circuit Breaker;

[0085] 1082: 12th molded case circuit breaker;

[0086] 1083: 13th Molded Case Circuit Breaker;

[0087] 109: Energy storage cabinet;

[0088] 1091: Sixth amplifier;

[0089] 1092: Seventh amplifier;

[0090] 1093: First energy storage energy block;

[0091] 1094: Second energy storage energy block;

[0092] 1095: first battery pack;

[0093] 1096: second battery pack;

[0094] 110: Main line;

[0095] 20: Solar photovoltaic panels;

[0096] 30: Electrical equipment group. DETAILED DESCRIPTION

[0097] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0098] Energy storage equipment systems significantly improve the flexibility and reliability of power systems by storing and releasing electrical energy. They play a key role in promoting the large-scale grid connection and absorption of renewable energy. Their role is mainly reflected in balancing grid supply and demand, improving the utilization rate of renewable energy, providing peak-shaving capabilities, improving the responsiveness and reliability of power systems, and improving system flexibility and sustainability. However, with the increasing proportion of renewable energy such as photovoltaics, conflicts have arisen in the collaboration between photovoltaic equipment and energy storage systems, resulting in the inability of photovoltaic energy storage systems to operate normally. However, there is currently no effective photovoltaic energy storage system to regulate the conflict between photovoltaic equipment and energy storage systems. Therefore, there is an urgent need for a photovoltaic energy storage system that can regulate the conflict between photovoltaic equipment and energy storage systems to ensure the normal operation of photovoltaic energy storage systems.

[0099] In order to solve the above technical problems, the embodiments of the present application propose the following technical concept: the inventors construct photovoltaic energy storage equipment based on a photovoltaic grid-connected cabinet, a capacitor cabinet, a first outgoing line cabinet, a second outgoing line cabinet, a main cabinet, a transformer, an energy storage grid-connected cabinet, an EMS cabinet, an energy storage cabinet and a main line, and use solar photovoltaic panels, photovoltaic energy storage equipment and electrical equipment groups to construct a photovoltaic energy storage system, thereby solving the problem of collaborative conflict between photovoltaic equipment and energy storage system and ensuring the normal operation of photovoltaic energy storage equipment.

[0100] Figure 1 A schematic diagram of a photovoltaic energy storage device provided in an embodiment of the present utility model Figure 1 .like Figure 1 The photovoltaic energy storage device 10 includes: a photovoltaic grid-connected cabinet 101, a capacitor cabinet 102, a first outgoing line cabinet 103, a second outgoing line cabinet 104, a main cabinet 105, a transformer 106, an energy storage grid-connected cabinet 107, an energy management system EMS cabinet 108, an energy storage cabinet 109 and a main line 110.

[0101] One end of the main line 110 is connected to the output end of the solar photovoltaic panel 20 , and the other end of the main line 110 is connected to the first end of the main cabinet 105 .

[0102] In this embodiment, the solar photovoltaic panel 20 is an electrical device that uses solar energy as a resource and converts solar energy into direct current electricity through the photovoltaic effect.

[0103] In this embodiment, the main cabinet 105 is used for power transmission and grid connection, power monitoring and detection, and induction current limitation.

[0104] Among them, power transmission and grid connection are used to transmit the electric energy generated by photovoltaic energy storage equipment to the power grid, realize the contribution of electricity and obtain electricity bill income.

[0105] Among them, power monitoring and detection are used to monitor parameters such as voltage, current and power of the power grid to ensure operational reliability.

[0106] The second end of the main cabinet 105 is connected to the transformer 106 in a circuit.

[0107] In this embodiment, the transformer 106 is used for voltage stepping, transmission loss reduction, power distribution, power system interconnection, and power load matching.

[0108] Among them, voltage boosting is used to reduce a high voltage to a required low voltage, or to increase a low voltage to a required high voltage.

[0109] Among them, the interconnection of power systems is used to connect power systems of different voltage levels to realize the transmission and distribution of electricity.

[0110] The third end of the main cabinet 105 is circuit-connected to one end of the energy storage grid cabinet 107 .

[0111] In this embodiment, the energy storage grid-connected cabinet 107 has an energy storage function, which can store the electric energy transmitted from the power grid during the off-peak period, and release the stored electric energy to the power grid when electricity is needed during the peak period to achieve a stable supply of electricity.

[0112] The other end of the energy storage grid cabinet 107 is circuit-connected to one end of the EMS cabinet 108 .

[0113] In this embodiment, the EMS cabinet 108 is used for operation monitoring, status prediction, fault diagnosis, and optimization control of the energy storage cabinet 109.

[0114] The other end of the EMS cabinet 108 is connected to the energy storage cabinet 109 by a circuit.

[0115] In this embodiment, the energy storage cabinet 109 is used to store and release electrical energy, and can quickly provide electricity during peak load periods of the power grid, ensuring continuous power supply to important equipment and places.

[0116] In this embodiment, the energy storage cabinet 109 can also serve as a variable load to adjust photovoltaic power generation and solve the problem of new energy consumption.

[0117] The photovoltaic grid-connected cabinet 101 is connected to the main line 110 circuit through a first access point.

[0118] In this embodiment, the photovoltaic grid-connected cabinet 101 is used to connect the photovoltaic power generation system to the power grid, and energy storage devices can also be added. These devices can be combined with the photovoltaic power generation system to form a grid-connected energy storage system, thereby realizing the storage and release of electric energy to meet the different needs of the power grid.

[0119] The capacitor cabinet 102 is connected to the main line 110 through a second access point.

[0120] In this embodiment, the capacitor bank 102 is used to generate capacitive current in the circuit, thereby offsetting the inductive current, reducing reactive current, and maintaining reactive power balance in the circuit. In addition, when the grid power decreases, the compensation capability of the capacitor bank can balance the power factor.

[0121] The input end of the first outlet cabinet 103 is connected to the main line 110 circuit through the third access point.

[0122] In this embodiment, the first outgoing line cabinet 103 is used to distribute, control, protect and monitor the power of the circuit.

[0123] The output end of the first outlet cabinet 103 is connected to the electrical equipment group 30 .

[0124] In this embodiment, the electric device group 30 may be one or more electric devices.

[0125] The input end of the second outlet cabinet 104 is connected to the main line 110 circuit through the fourth access point.

[0126] In this embodiment, the second outgoing line cabinet 104 is used to distribute, control, protect and monitor the power of the circuit.

[0127] The output end of the second outlet cabinet 104 is connected to the electrical equipment group 30 .

[0128] From the description of the above embodiments, it can be seen that the embodiments of the utility model provide electric energy to the electrical equipment group 30 through the collaboration of the solar photovoltaic panel 20, the photovoltaic grid-connected cabinet 101, the capacitor cabinet 102, the first outlet cabinet 103, the second outlet cabinet 104, the main cabinet 105, the transformer 106, the energy storage grid-connected cabinet 107, the energy management system EMS cabinet 108, the energy storage cabinet 109 and the main line 110, thereby solving the problem of collaborative conflict between the photovoltaic equipment and the energy storage system and ensuring the normal operation of the photovoltaic energy storage equipment.

[0129] Reference 2, Figure 2 A schematic diagram of a photovoltaic energy storage device provided in an embodiment of the present utility model Figure 2 .exist Figure 1 Based on the illustrated embodiment, the photovoltaic grid-connected cabinet 101 includes: a first isolator 1011 , a first molded case circuit breaker 1012 and a photovoltaic energy storage device 1013 .

[0130] One end of the first isolator 1011 is circuit-connected to the main line 110 through a first access point.

[0131] In this embodiment, the first isolator 1011 is used to protect circuit elements, overvoltage protection, overcurrent protection, short circuit protection, and improve the stability of the power system.

[0132] The other end of the first isolator 1011 is electrically connected to one end of the first molded case circuit breaker 1012 .

[0133] In this embodiment, the first molded case circuit breaker 1012 is used for overload protection, short circuit protection, and undervoltage protection of circuits and equipment.

[0134] Among them, overload protection is used when the current in the circuit exceeds its rated value. The molded case circuit breaker can automatically cut off the current to prevent the equipment from being damaged due to overload.

[0135] Among them, short-circuit protection is used when a short circuit occurs in the circuit. The molded case circuit breaker can quickly cut off the power supply to prevent the short-circuit current from damaging the equipment and lines.

[0136] Among them, undervoltage protection is used to cut off the power supply when the voltage is insufficient to protect the equipment from the impact of undervoltage.

[0137] The other end of the first molded case circuit breaker 1012 is connected to the photovoltaic energy storage device 1013 .

[0138] In this embodiment, the photovoltaic energy storage device 1013 is used to store electrical energy when there is sufficient sunshine, and to release it for use during peak electricity price periods.

[0139] In this embodiment, the photovoltaic energy storage device 1013 can store excess electricity and make it available to the grid through the main cabinet.

[0140] In addition, if the photovoltaic energy storage device 1013 does not exist, the photovoltaic grid-connected cabinet can directly generate electricity for its own use and upload the surplus electricity to the grid.

[0141] Continue to refer Figure 2 The capacitor cabinet 102 includes: a second isolator 1021, a first three-coil current transformer 1022, a first low-voltage lightning arrester 1023, a second molded case circuit breaker 1024, a first spring returner 1025 and a capacitor 1026.

[0142] One end of the second isolator 1021 is circuit-connected to the main line 110 through a second access point.

[0143] The other end of the second isolator 1021 is circuit-connected to the first end of the first three-coil current transformer 1022 .

[0144] In this embodiment, the first three-coil current transformer 1022 is used for current measurement, overcurrent protection, electric energy metering, fault detection, and connection of electrical instruments.

[0145] The second end of the first three-coil current transformer 1022 is circuit-connected to the first low-voltage lightning arrester 1023 .

[0146] In this embodiment, the first low-voltage lightning arrester 1023 is used to protect electrical equipment from the hazards of high transient overvoltage. It is connected between the grid conductor and the ground wire, or connected next to the electrical winding or between the conductors. It can effectively limit the amplitude and continuous current time of the overvoltage, thereby protecting the equipment from damage.

[0147] The third end of the first three-coil current transformer 1022 is circuit-connected to one end of the second molded case circuit breaker 1024 .

[0148] The other end of the second molded case circuit breaker 1024 is electrically connected to one end of the first spring returner 1025 .

[0149] In this embodiment, the first spring returner 1025 is used to provide a fast automatic return mechanism to avoid serious problems such as medium loss due to manual operation errors, and ensure that the device or valve can close automatically when no one is operating.

[0150] The other end of the first spring returner 1025 is connected to the circuit between the capacitor 1026 .

[0151] In this embodiment, the capacitor 1026 is used to improve the power factor, save energy, and protect the circuit.

[0152] Among them, improving the power factor is by compensating for reactive power, and the capacitor helps adjust the phase difference between the voltage and current in the circuit, thereby improving the power factor of the equipment.

[0153] Among them, saving electricity can achieve electricity saving by optimizing the operation of the power system and capacitors help reduce unnecessary energy consumption.

[0154] The protection circuit is used to prevent the subsequent electrical equipment group 30 from being damaged due to excessive current or voltage fluctuation.

[0155] Continue to refer Figure 2 The first outlet cabinet 103 includes: a third isolator 1031, a third molded case circuit breaker 1032, a fourth molded case circuit breaker 1033, a first single-coil current transformer 1034, a second single-coil current transformer 1035, a first amplifier 1036 and a second amplifier 1037.

[0156] An input end of the third isolator 1031 is connected to the main line 110 circuit through a third access point.

[0157] The output end of the third isolator 1031 is circuit-connected to the input end of the third molded case circuit breaker 1032 and the input end of the fourth molded case circuit breaker 1033 .

[0158] The output end of the third molded case circuit breaker 1032 is circuit-connected to the input end of the first single-coil current transformer 1034 .

[0159] In this embodiment, the first single-coil current transformer 1034 is used for current measurement, overcurrent protection, energy metering, and fault detection.

[0160] An output end of the fourth molded case circuit breaker 1033 is circuit-connected to an input end of the second single-coil current transformer 1035 .

[0161] The output end of the first single-coil current transformer 1034 is circuit-connected to the input end of the first amplifier 1036 .

[0162] In this embodiment, the first amplifier 1036 may be a voltage amplifier or a current amplifier.

[0163] Among them, the voltage amplifier is used to amplify the input voltage to a larger output voltage. The input impedance of the amplifier is high and the output impedance is low.

[0164] Among them, the current amplifier is used to convert the input current into a larger output current. The input impedance of the amplifier is low and the output impedance is high.

[0165] The output end of the second single-coil current transformer 1035 is circuit-connected to the input end of the second amplifier 1037 .

[0166] The output end of the first amplifier 1036 and the output end of the second amplifier 1037 are respectively connected to the circuit between the electrical equipment group 30.

[0167] Specifically, the output end of the first amplifier 1036 and the output end of the second amplifier 1037 are respectively connected to the electrical device 1 in the electrical device group 30 .

[0168] Continue to refer Figure 2 The second outlet cabinet 104 includes: a fourth isolator 1041, a fifth molded case circuit breaker 1042, a sixth molded case circuit breaker 1043, a seventh molded case circuit breaker 1044, a third single-coil current transformer 1045, a fourth single-coil current transformer 1046, a fifth single-coil current transformer 1047, a third amplifier 1048, a fourth amplifier 1049 and a fifth amplifier 10410.

[0169] An input end of the fourth isolator 1041 is connected to the main line 110 circuit through a fourth access point.

[0170] The output end of the fourth isolator 1041 is respectively connected to the input end of the fifth molded case circuit breaker 1042, the input end of the sixth molded case circuit breaker 1043, and the input end of the seventh molded case circuit breaker (1044).

[0171] The output end of the fifth molded case circuit breaker 1042 is circuit-connected to the input end of the third single-coil current transformer 1045 .

[0172] The output end of the sixth molded case circuit breaker 1043 is circuit-connected to the input end of the fourth single-coil current transformer 1046 .

[0173] The output end of the seventh molded case circuit breaker 1044 is circuit-connected to the input end of the fifth single-coil current transformer 1047 .

[0174] The output end of the third single-coil current transformer 1045 is circuit-connected to the input end of the third amplifier 1048 .

[0175] An output end of the fourth single-coil current transformer 1046 is circuit-connected to an input end of the fourth amplifier 1049 .

[0176] The output end of the fifth single-coil current transformer 1047 is circuit-connected to the input end of the fifth amplifier 10410 .

[0177] The output end of the third amplifier 1048 , the output end of the fourth amplifier 1049 , and the output end of the fifth amplifier 10410 are respectively connected to the circuit between the electrical equipment group 30 .

[0178] Specifically, the output end of the third amplifier 1048 , the output end of the fourth amplifier 1049 , and the output end of the fifth amplifier 10410 are respectively connected to the circuits of the electric device 2 in the electric device group 30 .

[0179] For example, if the electric energy of the solar photovoltaic panel 20 is less than the electric energy required by the electric device 1 and the electric device 2, the electric energy sources of the electric device 1 and the electric device 2 are the electric energy of the solar photovoltaic panel 20, the stored energy of the energy storage cabinet 109 and the grid power from the transformer 106.

[0180] For example, if the electric energy of the solar photovoltaic panel 20 is greater than the electric energy required by the electric device 1 and the electric device 2, the photovoltaic grid-connected cabinet 101 can be selected to prohibit charging the photovoltaic energy storage device 1013 and the energy storage cabinet 109, and feed full power to the grid; it can also be selected to allow charging of the photovoltaic energy storage device 1013 and the energy storage cabinet 109, with green electricity taking priority.

[0181] For example, the grid power from the transformer 106 can directly charge the energy storage cabinet 109 , and the power of the energy storage cabinet 109 can be transmitted to the power consumption device 1 and the power consumption device 2 .

[0182] For example, the grid power from the transformer 106 and the power from the solar photovoltaic panel 20 can directly charge the energy storage cabinet 109 , and the power of the energy storage cabinet 109 can be transmitted to the power consumption device 1 and the power consumption device 2 .

[0183] Continue to refer Figure 2 The main cabinet 105 includes: a vacuum circuit breaker 1051, a current transformer group 1052, a first electric energy meter 1053 and a second low-voltage lightning arrester 1054.

[0184] The second low-voltage lightning arrester 1054 is electrically connected to the other end of the main line 110 .

[0185] A first end of the current transformer group 1052 is circuit-connected to the other end of the main line 110 .

[0186] In this embodiment, the current transformer group 1052 includes seven single-coil current transformers.

[0187] The second end of the current transformer group 1052 is connected to the first electric energy meter 1053 in a circuit.

[0188] Specifically, the three parallel single-coil current transformers at the second end of the current transformer group 1052 are circuit-connected to the first electric energy meter 1053 .

[0189] The first electric energy meter 1053 may be a power quality monitoring instrument, which is used to sample the current of the low-voltage bus at a level of 0.2S, thereby monitoring the power quality.

[0190] The third end of the current transformer group 1052 is circuit-connected to one end of the energy storage grid cabinet 107 .

[0191] A fourth end of the current transformer group 1052 is circuit-connected to one end of the vacuum circuit breaker 1051 .

[0192] In this embodiment, the vacuum circuit breaker 1051 is used to protect circuits and equipment, preventing overload, short circuit, undervoltage and other situations from causing damage to the circuits and equipment.

[0193] The other end of the vacuum circuit breaker 1051 is connected to the transformer 106 in an electrical circuit.

[0194] Continue to refer Figure 2 The energy storage grid-connected cabinet 107 includes: an anti-islanding device 1071, a fifth isolator 1072, a second three-coil current transformer 1073, a second electric energy meter 1074, an eighth molded case circuit breaker 1075, a ninth molded case circuit breaker 1076, a socket 1077, a third three-coil current transformer 1078, a tenth molded case circuit breaker 1079 and a third low-voltage lightning arrester 10710.

[0195] One end of the anti-islanding device 1071 is circuit-connected to the third end of the current transformer group 1052 .

[0196] In this embodiment, the anti-islanding device 1071 is used to prevent the "islanding" state formed after the distributed power generation system is disconnected from the power grid when a power grid failure occurs, thereby ensuring the safe and stable operation of the power system.

[0197] One end of the fifth isolator 1072 is circuit-connected to the third end of the current transformer group 1052 .

[0198] The other end of the fifth isolator 1072 is circuit-connected to one end of the second three-coil current transformer 1073 .

[0199] A first end of the second three-coil current transformer 1073 is circuit-connected to the second electric energy meter 1074 .

[0200] In this embodiment, the second electric energy meter 1074 may be an electric energy quality monitoring instrument, which is used to prevent backflow and adjust the amount of energy storage power.

[0201] The second end of the second three-coil current transformer 1073 is circuit-connected to one end of the eighth molded case circuit breaker 1075 .

[0202] The third end of the second three-coil current transformer 1073 is circuit-connected to the first end of the ninth molded case circuit breaker 1076 .

[0203] The other end of the eighth molded case circuit breaker 1075 is electrically connected to the socket 1077;

[0204] In this embodiment, the socket 1077 can also be a socket with two or three holes.

[0205] A second end of the ninth molded case circuit breaker 1076 is circuit-connected to the other end of the anti-islanding device 1071 .

[0206] The third terminal of the ninth molded case circuit breaker 1076 is circuit-connected to the first terminal of the third three-coil current transformer 1078 .

[0207] The second end of the third three-coil current transformer 1078 is circuit-connected to one end of the tenth molded case circuit breaker 1079 .

[0208] In this embodiment, the tenth molded case circuit breaker 1079 also includes functions such as shunt, undervoltage tripping, auxiliary contacts, and alarm.

[0209] The other end of the tenth molded case circuit breaker 1079 is circuit-connected to the third low-voltage lightning arrester 10710 .

[0210] In this embodiment, the third low-voltage lightning arrester 10710 may also be a T1-level surge protector.

[0211] The third end of the third three-coil current transformer 1078 is circuit-connected to one end of the EMS cabinet 108 .

[0212] Continue to refer Figure 2 , EMS cabinet 108 , includes: an eleventh molded case circuit breaker 1081 , a twelfth molded case circuit breaker 1082 , and a thirteenth molded case circuit breaker 1083 .

[0213] One end of the eleventh molded case circuit breaker 1081 is circuit-connected to the third end of the third three-coil current transformer 1078 .

[0214] The other end of the eleventh molded case circuit breaker 1081 is circuit-connected to one end of the twelfth molded case circuit breaker 1082 and one end of the thirteenth molded case circuit breaker 1083 .

[0215] The other end of the twelfth molded case circuit breaker 1082 and the other end of the thirteenth molded case circuit breaker 1083 are circuit-connected to the energy storage cabinet 109 .

[0216] Continue to refer Figure 2 The energy storage cabinet 109 includes: a sixth amplifier 1091, a seventh amplifier 1092, a first energy storage energy block 1093, a second energy storage energy block 1094, a first battery group 1095 and a second battery group 1096.

[0217] One end of the sixth amplifier 1091 is circuit-connected to the other end of the twelfth molded case circuit breaker 1082 .

[0218] One end of the seventh amplifier 1092 is circuit-connected to the other end of the thirteenth molded case circuit breaker 1083 .

[0219] The other end of the sixth amplifier 1091 is circuit-connected to one end of the first energy storage block 1093 .

[0220] In this embodiment, the first energy storage block 1093 is used to store energy in a short period of time and release the energy at an appropriate time.

[0221] In this embodiment, the first energy storage block 1093 includes a 100kW bidirectional converter with an isolation function.

[0222] The other end of the first energy storage block 1093 is circuit-connected to the first battery pack 1095 .

[0223] In this embodiment, the total capacity of the first battery group 1095 is 400 kWh, including two battery clusters with a capacity of 200 kWh.

[0224] The other end of the seventh amplifier 1092 is circuit-connected to one end of the second energy storage block 1094 .

[0225] In this embodiment, the second energy storage block 1094 also includes a 100kW bidirectional converter with an isolation function.

[0226] The other end of the second energy storage block 1094 is circuit-connected to the second battery pack 1096 .

[0227] In this embodiment, the total capacity of the second battery group 1096 is also 400 kWh, including two battery clusters with a capacity of 200 kWh.

[0228] From the description of the above embodiments, it can be seen that the embodiments of the utility model provide electrical energy to the electrical equipment group 30 through the collaboration of internal components of the solar photovoltaic panel 20, the photovoltaic grid-connected cabinet 101, the capacitor cabinet 102, the first outlet cabinet 103, the second outlet cabinet 104, the main cabinet 105, the transformer 106, the energy storage grid-connected cabinet 107, the energy management system EMS cabinet 108, the energy storage cabinet 109 and the main line 110, thereby solving the problem of collaborative conflict between the photovoltaic equipment and the energy storage system and ensuring the normal operation of the photovoltaic energy storage equipment.

[0229] Figure 3 A photovoltaic energy storage system is provided in the embodiment of the present utility model. Figure 3 The photovoltaic energy storage system includes: a photovoltaic energy storage device 10, a solar photovoltaic panel 20 and an electrical equipment group 30.

[0230] The output end of the solar photovoltaic panel 20 is connected to the photovoltaic grid cabinet 101 via a circuit.

[0231] In this embodiment, the discussion about the solar photovoltaic panel 20 and the photovoltaic grid cabinet 101 has been Figure 1 The corresponding embodiments are described in detail and will not be repeated here.

[0232] The electrical equipment group 30 is respectively connected to the output end of the first outgoing line cabinet 103 and the output end of the second outgoing line cabinet 104 .

[0233] In this embodiment, the discussion about the electric equipment group 30, the first outlet cabinet 103 and the second outlet cabinet 104 has been made in Figure 1 The corresponding embodiments are described in detail and will not be repeated here.

[0234] In addition, the photovoltaic energy storage device 10 also includes functions such as frequency regulation, peak shaving and valley filling, power generation plan curve correction, peak-valley arbitrage, smooth output, and over-demand prevention.

[0235] From the description of the above embodiments, it can be seen that the embodiments of the present invention make the photovoltaic energy storage device system more complete through the cooperation between the photovoltaic energy storage device 10, the solar photovoltaic panel 20 and the electrical equipment group 30.

[0236] Those skilled in the art will readily recognize other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0237] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A photovoltaic energy storage device, characterized in that: include: Photovoltaic grid-connected cabinet (101), capacitor cabinet (102), first outgoing line cabinet (103), second outgoing line cabinet (104), main cabinet (105), transformer (106), energy storage grid-connected cabinet (107), energy management system EMS cabinet (108), energy storage cabinet (109) and main line (110); One end of the main line (110) is connected to the output end of the solar photovoltaic panel (20), and the other end of the main line (110) is connected to the first end of the main cabinet (105); The second end of the main cabinet (105) is connected to the transformer (106) in a circuit; A third end of the main cabinet (105) is connected to one end of the energy storage grid cabinet (107) in a circuit; The other end of the energy storage grid cabinet (107) is connected to one end of the EMS cabinet (108) by a circuit; The other end of the EMS cabinet (108) is connected to the energy storage cabinet (109) by a circuit; The photovoltaic grid-connected cabinet (101) is connected to the main line (110) circuit via a first access point; The capacitor cabinet (102) is connected to the main line (110) circuit via a second access point; The input end of the first outlet cabinet (103) is connected to the main line (110) circuit via a third access point; The output end of the first outlet cabinet (103) is connected to the electrical equipment group (30); The input end of the second outlet cabinet (104) is connected to the main line (110) circuit via a fourth access point; The output end of the second outlet cabinet (104) is connected to the electrical circuit of the electrical equipment group (30).

2. The photovoltaic energy storage device according to claim 1, characterized in that: The photovoltaic grid-connected cabinet (101) comprises: A first isolator (1011), a first molded case circuit breaker (1012), and a photovoltaic energy storage device (1013); One end of the first isolator (1011) is connected to the main line (110) circuit via a first access point; The other end of the first isolator (1011) is connected to one end of the first molded case circuit breaker (1012) in a circuit; The other end of the first molded case circuit breaker (1012) is connected to the photovoltaic energy storage device (1013) in a circuit.

3. The photovoltaic energy storage device according to claim 1, characterized in that: The capacitor cabinet (102) comprises: A second isolator (1021), a first three-coil current transformer (1022), a first low-voltage lightning arrester (1023), a second molded case circuit breaker (1024), a first spring returner (1025), and a capacitor (1026); One end of the second isolator (1021) is connected to the main line (110) circuit via a second access point; The other end of the second isolator (1021) is connected in a circuit to the first end of the first three-coil current transformer (1022); The second end of the first three-coil current transformer (1022) is connected to the first low-voltage lightning arrester (1023); A third end of the first three-coil current transformer (1022) is connected in a circuit to one end of the second molded case circuit breaker (1024); The other end of the second molded case circuit breaker (1024) is electrically connected to one end of the first spring returner (1025); The other end of the first spring returner (1025) is connected to the circuit between the capacitor (1026).

4. The photovoltaic energy storage device according to claim 1, characterized in that: The first outlet cabinet (103) comprises: A third isolator (1031), a third molded case circuit breaker (1032), a fourth molded case circuit breaker (1033), a first single-coil current transformer (1034), a second single-coil current transformer (1035), a first amplifier (1036), and a second amplifier (1037); The input end of the third isolator (1031) is connected to the main line (110) circuit via a third access point; The output end of the third isolator (1031) is respectively connected to the input end of the third molded case circuit breaker (1032) and the input end of the fourth molded case circuit breaker (1033); The output end of the third molded case circuit breaker (1032) is circuit-connected to the input end of the first single-coil current transformer (1034); The output end of the fourth molded case circuit breaker (1033) is connected to the input end of the second single-coil current transformer (1035); The output end of the first single-coil current transformer (1034) is connected in a circuit to the input end of the first amplifier (1036); The output end of the second single-coil current transformer (1035) is connected to the input end of the second amplifier (1037); The output end of the first amplifier (1036) and the output end of the second amplifier (1037) are respectively connected to the circuit between the electrical equipment group (30).

5. The photovoltaic energy storage device according to claim 1, characterized in that: The second outlet cabinet (104) comprises: a fourth isolator (1041), a fifth molded case circuit breaker (1042), a sixth molded case circuit breaker (1043), a seventh molded case circuit breaker (1044), a third single-coil current transformer (1045), a fourth single-coil current transformer (1046), a fifth single-coil current transformer (1047), a third amplifier (1048), a fourth amplifier (1049), and a fifth amplifier (10410); The input end of the fourth isolator (1041) is connected to the main line (110) circuit via a fourth access point; The output end of the fourth isolator (1041) is respectively connected to the input end of the fifth molded case circuit breaker (1042), the input end of the sixth molded case circuit breaker (1043), and the input end of the seventh molded case circuit breaker (1044); The output end of the fifth molded case circuit breaker (1042) is connected to the input end of the third single-coil current transformer (1045); The output end of the sixth molded case circuit breaker (1043) is connected to the input end of the fourth single-coil current transformer (1046); The output end of the seventh molded case circuit breaker (1044) is connected to the input end of the fifth single-coil current transformer (1047); The output end of the third single-coil current transformer (1045) is connected to the input end of the third amplifier (1048); The output end of the fourth single-coil current transformer (1046) is connected in a circuit to the input end of the fourth amplifier (1049); The output end of the fifth single-coil current transformer (1047) is connected in a circuit to the input end of the fifth amplifier (10410); The output end of the third amplifier (1048), the output end of the fourth amplifier (1049), and the output end of the fifth amplifier (10410) are respectively connected to the circuit between the electrical equipment group (30).

6. The photovoltaic energy storage device according to claim 1, characterized in that: The main cabinet (105) includes: A vacuum circuit breaker (1051), a current transformer group (1052), a first electric energy meter (1053), and a second low-voltage lightning arrester (1054); The second low-voltage lightning arrester (1054) is connected to the other end of the main line (110) in an electrical circuit; A first end of the current transformer group (1052) is connected in circuit to the other end of the main line (110); The second end of the current transformer group (1052) is connected to the first electric energy meter (1053); A third end of the current transformer group (1052) is connected to one end of the energy storage grid cabinet (107); A fourth end of the current transformer group (1052) is connected to one end of the vacuum circuit breaker (1051); The other end of the vacuum circuit breaker (1051) is connected to the transformer (106) in a circuit.

7. The photovoltaic energy storage device according to claim 6, characterized in that: The energy storage grid cabinet (107) comprises: an anti-islanding device (1071), a fifth isolator (1072), a second three-coil current transformer (1073), a second electric energy meter (1074), an eighth molded case circuit breaker (1075), a ninth molded case circuit breaker (1076), a socket (1077), a third three-coil current transformer (1078), a tenth molded case circuit breaker (1079), and a third low-voltage lightning arrester (10710); One end of the anti-islanding device (1071) is connected to the third end of the current transformer group (1052) in a circuit; One end of the fifth isolator (1072) is connected to the third end of the current transformer group (1052); The other end of the fifth isolator (1072) is connected in a circuit to one end of the second three-coil current transformer (1073); The first end of the second three-coil current transformer (1073) is connected to the second electric energy meter (1074); The second end of the second three-coil current transformer (1073) is connected to one end of the eighth molded case circuit breaker (1075); The third end of the second three-coil current transformer (1073) is connected to the first end of the ninth molded case circuit breaker (1076); The other end of the eighth molded case circuit breaker (1075) is connected to the socket (1077); The second end of the ninth molded case circuit breaker (1076) is connected to the other end of the anti-islanding device (1071); The third end of the ninth molded case circuit breaker (1076) is electrically connected to the first end of the third three-coil current transformer (1078); The second end of the third three-coil current transformer (1078) is connected to one end of the tenth molded case circuit breaker (1079); The other end of the tenth molded case circuit breaker (1079) is connected to the third low-voltage lightning arrester (10710); The third end of the third three-coil current transformer (1078) is connected to one end of the EMS cabinet (108) in an electrical circuit.

8. The photovoltaic energy storage device according to claim 7, characterized in that: The EMS cabinet (108) comprises: an eleventh molded case circuit breaker (1081), a twelfth molded case circuit breaker (1082), and a thirteenth molded case circuit breaker (1083); One end of the eleventh molded case circuit breaker (1081) is connected to the third end of the third three-coil current transformer (1078); The other end of the eleventh molded case circuit breaker (1081) is respectively connected to one end of the twelfth molded case circuit breaker (1082) and one end of the thirteenth molded case circuit breaker (1083); The other end of the twelfth molded case circuit breaker (1082) and the other end of the thirteenth molded case circuit breaker (1083) are connected to the energy storage cabinet (109) in a circuit.

9. The photovoltaic energy storage device according to claim 8, characterized in that: The energy storage cabinet (109) comprises: a sixth amplifier (1091), a seventh amplifier (1092), a first energy storage energy block (1093), a second energy storage energy block (1094), a first battery group (1095), and a second battery group (1096); One end of the sixth amplifier (1091) is connected to the other end of the twelfth molded case circuit breaker (1082); One end of the seventh amplifier (1092) is connected to the other end of the thirteenth molded case circuit breaker (1083); The other end of the sixth amplifier (1091) is connected in a circuit to one end of the first energy storage block (1093); The other end of the first energy storage block (1093) is connected to the first battery pack (1095) in a circuit; The other end of the seventh amplifier (1092) is circuit-connected to one end of the second energy storage block (1094); The other end of the second energy storage block (1094) is connected to the circuit of the second battery pack (1096).

10. A photovoltaic energy storage system, characterized in that: Comprising the photovoltaic energy storage device according to any one of claims 1 to 9, as well as a solar photovoltaic panel (20) and an electrical equipment group (30); The output end of the solar photovoltaic panel (20) is connected to the photovoltaic grid cabinet (101) in a circuit; The electrical equipment group (30) is respectively connected to the output end of the first outgoing line cabinet (103) and the output end of the second outgoing line cabinet (104).

Images