Grid-connected and off-grid switching optical storage distributed energy storage cabinet

Abstract

The utility model relates to the field of energy storage, in particular to a grid-connected and off-grid switching optical storage distributed energy storage cabinet. Comprising a cabinet body and a battery cluster, the battery cluster is arranged in a battery cabin, the battery cluster is composed of multiple groups of battery plug boxes, and batteries are installed in the battery plug boxes; the high-voltage box is fixedly arranged at the bottom of the cabinet body and is connected with the battery cluster; the energy storage converter is arranged in the cabinet body, and one end of the energy storage converter is connected with the high-voltage box; the static change-over switch is located in the cabinet body, the static change-over switch is arranged at the lower part of the energy storage converter, and the other end of the energy storage converter is connected with the static change-over switch; and the bidirectional inverter group is connected between the energy storage converter and the high-voltage box through a line 1. According to the distributed energy storage cabinet, the internal layout of the distributed energy storage cabinet is adjusted, and a photovoltaic access system is added, so that light storage integration is realized, and the utilization rate of new energy is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of energy storage, and particularly relates to a grid-connected and off-grid switching photovoltaic storage distributed energy storage cabinet. BACKGROUND

[0002] With the continuous optimization and adjustment of global energy structure, the photovoltaic storage integrated system as an important development direction in the new energy field is receiving more and more attention. The utility model aims to provide a comprehensive, efficient and sustainable photovoltaic storage integrated solution to meet the growing demand for new energy "green electricity".

[0003] Most of the existing distributed energy storage cabinets do not have a direct DC / DC access photovoltaic system, which has certain deficiencies in improving the utilization rate of new energy, especially photovoltaic power generation, reducing the utilization rate of traditional petrochemical energy, and reducing carbon emissions. In addition, the existing distributed energy storage cabinet generally adopts a grid-connected operation mode, and rarely adopts an off-grid operation mode. In the off-grid operation mode, a manual off-grid operation mode is mostly adopted, and seamless switching between grid-connected and off-grid operation modes cannot be achieved. SUMMARY

[0004] To solve the problems of the prior art, the utility model provides a grid-connected and off-grid switching photovoltaic storage distributed energy storage cabinet.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A grid-connected and off-grid switching photovoltaic storage distributed energy storage cabinet comprises:

[0007] A cabinet body, a power distribution control cabin on the left side, and a battery cabin on the right side;

[0008] A battery cluster arranged in the battery cabin, the battery cluster being composed of a plurality of battery plug-in boxes, and batteries being arranged in the battery plug-in boxes;

[0009] A high-voltage box fixedly arranged at the bottom of the cabinet body, the high-voltage box being connected with the battery cluster;

[0010] An energy storage converter arranged in the cabinet body, one end of the energy storage converter being connected with the high-voltage box;

[0011] A static transfer switch arranged in the cabinet body, the static transfer switch being arranged below the energy storage converter, and the other end of the energy storage converter being connected with the static transfer switch;

[0012] A bidirectional inverter group connected with the bidirectional inverter group through a line one between the energy storage converter and the high-voltage box.

[0013] Further, the static transfer switch is connected with the commercial power through a circuit breaker one.

[0014] Further, the energy storage converter and the static transfer switch are connected with a load through a line two.

[0015] Further, the static transfer switch is connected with the circuit breaker one through the line three and the line two, and the circuit breaker two is arranged on the line three.

[0016] Further, the circuit breaker three is arranged on the line two, and one end of the circuit breaker three is connected with the load.

[0017] Further, the bidirectional inverter group comprises:

[0018] The bidirectional inverter one is connected with the circuit breaker four, and the bidirectional inverter one is connected with the photovoltaic system one through the circuit breaker four;

[0019] The bidirectional inverter two is connected with the circuit breaker five, and the bidirectional inverter two is connected with the photovoltaic system two through the circuit breaker five.

[0020] Compared with the prior art, the utility model has the beneficial effects that: the utility model adjusts the internal layout of the distributed energy storage cabinet, adds the photovoltaic access system, realizes the photovoltaic storage integration, and further improves the utilization rate of new energy; in the case of power failure, the static transfer switch is cut off with the power grid, the load is powered by the battery cluster, and the requirements of seamless switching of on-grid and off-grid are met. BRIEF DESCRIPTION OF DRAWINGS

[0021] Other characteristics, objects and advantages of the utility model will become more apparent through reading the following detailed description of the non-restrictive embodiments with reference to the accompanying drawings.

[0022] Figure 1 It is the cabinet body main view structural schematic diagram in the utility model.

[0023] Figure 2 It is the cabinet body side view structural schematic diagram in the utility model.

[0024] Figure 3 It is the cabinet body rear portion structural schematic diagram in the utility model.

[0025] Figure 4 It is the cabinet body internal structure schematic diagram in the utility model.

[0026] Figure 5 It is the topology diagram of the utility model.

[0027] Figure 6 It is the communication architecture diagram of the utility model.

[0028] Wherein: 100, cabinet body; 101, battery cluster; 1011, smoke detector; 1012, temperature detector; 1013, combustible gas detector; 103, battery cabin; 1031, battery plug-in box; 102, power distribution control cabin; 200, high voltage box; 300, energy storage converter; 400, static transfer switch; 600, line one; 401, circuit breaker one; 700, line two; 701, circuit breaker three; 800, line three; 801, circuit breaker two; 500, bidirectional inverter group; 501, bidirectional inverter one; 502, bidirectional inverter two; 601, circuit breaker four; 602, circuit breaker five; 901, photovoltaic system one; 902, photovoltaic system two; 903, load. DETAILED DESCRIPTION

[0029] The utility model will be further explained in detail by examples below, and the examples are only used to illustrate the utility model and do not limit the scope of the utility model.

[0030] A kind of parallel and off-grid switching's light storage distributed energy storage cabinet, comprising:

[0031] Cabinet body 100 adopts left and right cabin integrated structure, and its left side is power distribution control cabin 102, and right side is battery cabin 103;

[0032] Battery cluster 101 is arranged in battery cabin 103, and battery cluster 101 is composed of multiple battery plug-in boxes 1031, batteries are installed in battery plug-in box 1031, and the voltage of battery cluster 101 is 768v, and the power is 215.04kWh;Battery plug-in box 1031 is symmetrically arranged in battery cabin 103, so that the weight of battery cluster 101 in cabinet body 100 is evenly arranged.

[0033] High voltage box 200 is fixedly arranged at the bottom of cabinet body 100, and high voltage box 200 is connected with battery cluster 101;

[0034] Energy storage converter 300 is arranged in cabinet body 100, one end of energy storage converter 300 is connected with high voltage box 200, and the rated power of energy storage converter 300 is 100KW;

[0035] Static transfer switch 400 is located in the interior of cabinet body 100, and static transfer switch 400 is arranged in the lower part of energy storage converter 300, and the other end of energy storage converter 300 is connected with static transfer switch 400;The rated power of static transfer switch 400 is 200KW;

[0036] Bidirectional inverter group 500 is connected with bidirectional inverter group 500 through line one 600 between energy storage converter 300 and high voltage box 200;Bidirectional inverter group 500 is connected with photovoltaic system.Photovoltaic system includes photovoltaic system one 901 and photovoltaic system two 902.

[0037] The static transfer switch 400 is connected with the mains through the circuit breaker one 401; the circuit breaker one 401 is a 4P circuit breaker, and the rated current thereof is 400 A;

[0038] The energy storage converter 300 and the static transfer switch 400 are connected with the load 903 through the circuit two 700;

[0039] The static transfer switch 400 and the circuit breaker one 401 are connected with the circuit two 700 through the circuit three 800, and the circuit breaker two 801 is arranged on the circuit three 800; the circuit breaker two 801 is a 3P circuit breaker, and the rated current thereof is 400 A;

[0040] The circuit breaker three 701 is arranged on the circuit two 700; the circuit breaker three 701 is a 3P circuit breaker, and the rated current thereof is 20 A; one end of the circuit breaker three 701 is connected with the load 903;

[0041] The bidirectional inverter group 500 comprises:

[0042] The bidirectional inverter one 501 has a rated power of 50 KW, and one end thereof is connected with the circuit breaker four 601; the circuit breaker four 601 is a 4P circuit breaker, and the rated current thereof is 100 A; the bidirectional inverter one 501 is connected with the photovoltaic system one 901 through the circuit breaker four 601; the bidirectional inverter one 501 is a DC / DC module;

[0043] The bidirectional inverter two 502 has a rated power of 50 KW, and one end thereof is connected with the circuit breaker five 602; the circuit breaker five 602 is a 4P circuit breaker, and the rated current thereof is 100 A; the bidirectional inverter two 502 is connected with the photovoltaic system two 902 through the circuit breaker five 602; the bidirectional inverter two 502 is a DC / DC module;

[0044] The circuit breaker four 601 and the circuit breaker five 602 are arranged at the front part of the power distribution control cabin 102.

[0045] The bidirectional inverter group 500 is located in the cabinet body 100, and the bidirectional inverter group 500 is located at the upper part of the energy storage converter 300; the bidirectional inverter one 501 is located at the upper part of the bidirectional inverter two 502;

[0046] The direct current of the photovoltaic system one 901 passes through the circuit breaker four 601 to the bidirectional inverter one 501, and then the direct current of the photovoltaic system one 901 is directly connected to the direct current side of the energy storage converter 300 and the high-voltage box 200 after voltage conversion of the bidirectional inverter one 501. The direct current of the photovoltaic system one 901 passes through the energy storage converter 300, and can supply power to the load 903, or passes through the high-voltage box 200, and charges the battery cluster 101.

[0047] When photovoltaic system one 901 and photovoltaic system two 902 generate insufficient electricity, photovoltaic system one 901 and photovoltaic system two 902 and battery cluster 101 jointly supply power to load 903, and if insufficient, the remaining power is supplemented by the mains; when photovoltaic system one 901 and photovoltaic system two 902 are sufficient, photovoltaic system one 901 and photovoltaic system two 902 supply power to load 903, if there is a photovoltaic power surplus, photovoltaic system one 901 and photovoltaic system two 902 charge battery cluster 101, and if there is a photovoltaic power surplus, the photovoltaic power of photovoltaic system one 901 and photovoltaic system two 902 is limited to prevent reverse flow to the power grid of the mains.

[0048] The mains supply power to load 903 through circuit breaker one 401, static transfer switch 400 and line two 700 and circuit breaker three 701. If static transfer switch 400 fails, the mains can supply power to load 903 through circuit breaker two 801 and circuit breaker three 701. In the case of mains power failure, static transfer switch 400 and circuit breaker two 801 are disconnected, cutting off the connection with the power grid of the mains, and EMS issues an instruction, and energy storage converter 300 enters an off-grid operating state, and battery cluster 101 supplies power to load 903, and the switching time is not greater than 20ms, meeting the requirement of seamless switching between on-grid and off-grid.

[0049] Smoke detector 1011, heat detector 1012 and combustible gas detector 1013 are fixedly arranged on the upper part of battery cabin 103, and specifically, smoke detector 1011, heat detector 1012 and combustible gas detector 1013 are located on the upper part of the battery plug-in box.

[0050] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. A grid-connected and off-grid switching optical storage distributed energy storage cabinet, characterized in that, The utility model relates to a cabinet for energy storage and photovoltaic system, comprising: a cabinet body, with a power distribution control cabin on the left side and a battery cabin on the right side; a battery cluster arranged in the battery cabin, the battery cluster being composed of a plurality of battery plug-in boxes, and batteries being installed in the battery plug-in boxes; a high-voltage box fixedly arranged at the bottom of the cabinet body, the high-voltage box being connected with the battery cluster; a storage energy converter arranged in the cabinet body, one end of the storage energy converter being connected with the high-voltage box; a static transfer switch arranged inside the cabinet body, the static transfer switch being arranged below the storage energy converter, and the other end of the storage energy converter being connected with the static transfer switch; a bidirectional inverter group connected with the storage energy converter and the high-voltage box through a line one.

2. The off-grid switched optical storage distributed energy cabinet according to claim 1, characterized in that, The static transfer switch is connected with a commercial power supply through a circuit breaker one.

3. The off-grid switched optical storage distributed energy cabinet according to claim 1, characterized in that, The storage energy converter and the static transfer switch are connected with a load through a line two.

4. The off-grid switched optical storage distributed energy cabinet according to claim 3, characterized in that, The static transfer switch and the circuit breaker one are connected with the line two through a line three, and a circuit breaker two is arranged on the line three.

5. The off-grid switched optical storage distributed energy cabinet according to claim 3, characterized in that, A circuit breaker three is arranged on the line two, one end of the circuit breaker three being connected with the load.

6. The off-grid switched optical storage distributed energy cabinet according to claim 4, characterized in that, The bidirectional inverter group comprises: a bidirectional inverter one, one end of the bidirectional inverter one being connected with a circuit breaker four, and the bidirectional inverter one being connected with a photovoltaic system one through the circuit breaker four; a bidirectional inverter two, one end of the bidirectional inverter two being connected with a circuit breaker five, and the bidirectional inverter two being connected with a photovoltaic system two through the circuit breaker five.

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