Grid-connected cabin and cascade energy storage system

Abstract

The utility model belongs to the technical field of energy storage systems, and discloses a grid-connected cabin and a cascade energy storage system. The grid-connected cabin comprises a box body, a first support, a second support and a third support. A partition plate is arranged in the box body and is used for dividing the box body into a high-voltage area and a low-voltage area; the first support and the second support are both arranged in a high-voltage area, an electric reactor is fixed on the first support, a soft start switch, a current transformer and a voltage transformer are fixed on the second support, the electric reactor is connected with one end of the soft start switch, and the other end of the soft start switch is connected with the current transformer. The voltage transformer is connected in parallel to the soft start switch and the current transformer branch; the third support is arranged in the low-voltage area, a first control cabinet is fixed to the third support, and the first control cabinet is used for controlling the energy storage converter. The grid-connected cabin is compact in structure, small in occupied area and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage system technical field especially relates to a kind of grid-connected cabin and cascade energy storage system. BACKGROUND

[0002] High-voltage direct-hanging cascade energy storage system is composed of grid-connected cabin and chain cabin, that is, all equipment is installed in cabin, thereby reducing equipment floor area and field installation wiring workload. Among them, grid-connected cabin is composed of high-voltage switch cabinet (including vacuum circuit breaker, isolation grounding switch, arrester, voltage transformer, current transformer, relay protection device, etc.), connecting reactor, low-voltage switch cabinet, PCS control cabinet, EMS cabinet, BMS cabinet, etc.

[0003] At present, when high-voltage direct-hanging cascade energy storage system is applied in user side energy storage project (connected to 10kV and below power grid, single system energy is 4~10MWh), high-voltage distribution equipment of its grid-connected cabin uses standard high-voltage switch cabinet, and low-voltage distribution device uses low-voltage switch cabinet, and there are problems such as redundancy in design configuration, high cost, etc.

[0004] Therefore, it is urgent to propose a grid-connected cabin and cascade energy storage system to solve the above technical problems. UTILITY MODEL CONTENT

[0005] According to one aspect of the utility model, the utility model provides a kind of grid-connected cabin, its structure is compact, and floor area is smaller, and cost is lower.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Grid-connected cabin includes:

[0008] Box, the box is equipped with partition, the partition is used to divide the high-voltage area and low-voltage area in the box;

[0009] First support and second support are all arranged in the high-voltage area, the first support is fixed with reactor, the second support is fixed with soft start switch, current transformer and voltage transformer, the reactor is connected with one end of the soft start switch, the other end of the soft start switch is connected with the current transformer, and the voltage transformer is connected in parallel on the soft start switch and the current transformer branch;

[0010] Third support is arranged in the low-voltage area, and the first control cabinet is fixed on the third support, and the first control cabinet is used to control energy storage converter.

[0011] Optionally, the second support frame comprises a first frame, a first bracket and a second bracket, the first bracket and the second bracket are arranged on the first frame in a vertical direction; the soft start switch comprises a first vacuum contactor, a second vacuum contactor and a starting resistor; the first vacuum contactor and the current transformer are arranged on the first bracket, the first vacuum contactor is close to the reactor relative to the current transformer, the second vacuum contactor and the voltage transformer are arranged on the second bracket, the second vacuum contactor is close to the reactor relative to the voltage transformer, and the starting resistor is arranged on one side of the first frame close to the reactor.

[0012] Optionally, one side of the first frame close to the current transformer and the voltage transformer is provided with a lightning arrester, and the lightning arrester is connected in parallel with the soft start switch and the current transformer branch.

[0013] Optionally, the first support frame comprises a second frame and a supporting plate arranged on the top of the second frame, the reactor is fixed on the top of the second frame and the supporting plate, and the side of the second frame is provided with a first jack hole for cooperating with a fork plate of a forklift truck.

[0014] And / or, the third support frame comprises a third frame, the first control cabinet is fixed on the top of the third frame, and the side of the third frame is provided with a second jack hole for cooperating with a fork plate of a forklift truck.

[0015] And / or, the low-voltage area is further provided with a fourth support frame, and a second control cabinet is fixed on the fourth support frame, and the second control cabinet is used for controlling an energy management system.

[0016] And / or, the cabinet door of the first control cabinet is provided with a battery management system.

[0017] Optionally, one side wall of the cabinet surrounding the high-voltage area is provided with a primary incoming line hole, and the other side wall of the cabinet surrounding the high-voltage area is provided with a primary outgoing line hole.

[0018] The cabinet surrounding the low-voltage area is provided with a secondary incoming line hole and a secondary outgoing line hole on one side wall.

[0019] Optionally, the cabinet is further provided with a high-voltage cabinet door corresponding to the high-voltage area, the high-voltage cabinet door is provided with an air inlet, and a fan corresponding to the air inlet is arranged in the high-voltage area; and an air conditioner is arranged in the low-voltage area.

[0020] Optionally, a fire detection device is arranged in the high-voltage area and / or the low-voltage area on the top of the cabinet.

[0021] Optionally, a visual monitoring device is arranged on the top of the box in the high-pressure area and / or the low-pressure area.

[0022] Optionally, an observation window is arranged on the partition plate.

[0023] According to another aspect of the present application, the present application further provides a cascade energy storage system, comprising a chain cabin and the grid-connected cabin according to any one of the above technical solutions, and the reactor of the grid-connected cabin is electrically connected with the power module of the chain cabin.

[0024] The present application has the following advantages:

[0025] The present application provides a grid-connected cabin, comprising a box, a first support, a second support and a third support. The box is divided into a high-pressure area and a low-pressure area by arranging a partition plate in the box, and high-voltage components are arranged in the high-pressure area and low-voltage components are arranged in the low-pressure area. Compared with the multi-cabinet structure in the prior art, the gap between the cabinets and the excess frame structure are eliminated, the compactness of the structure is improved, and the occupied space is reduced. Moreover, it is convenient for maintenance personnel to repair the components in the high-pressure area or the low-pressure area, and the failure of one area can be prevented from spreading to another area. In addition, the high-voltage components and the low-voltage components can be arranged according to actual needs, and compared with the integrated high-voltage switch cabinet and low-voltage switch cabinet, unnecessary excess components are saved, and the cost is greatly saved.

[0026] The first support, the second support and the third support are used to fix the components, the modularity of the components is realized, most of the assembly, wiring and debugging work can be completed in the factory, and the modular production and transportation are facilitated.

[0027] The present application further provides a cascade energy storage system, comprising a chain cabin and the grid-connected cabin. The cascade energy storage system has low cost, is convenient to maintain and occupies small space due to the adoption of the grid-connected cabin. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and the drawings.

[0029] Figure 1 is a schematic diagram of the internal structure of the grid-connected cabin provided by the embodiments of the present application;

[0030] Figure 2 is a schematic diagram of the internal structure of the box provided by the embodiments of the present application;

[0031] Figure 3 is Figure 1 Enlarged view at A;

[0032] Figure 4 is Figure 2 Enlarged view at B;

[0033] Figure 5 is a circuit diagram in a high-voltage area provided by an embodiment of the present application;

[0034] Figure 6 is a structural schematic view of a first support provided by an embodiment of the present application;

[0035] Figure 7 is a structural schematic view of a third support provided by an embodiment of the present application;

[0036] Figure 8 is an external structural schematic view of a box from one perspective provided by an embodiment of the present application;

[0037] Figure 9 is an external structural schematic view of a box from another perspective provided by an embodiment of the present application.

[0038] In the figure:

[0039] 100, box; 101, high-voltage area; 1011, primary incoming line hole; 1012, primary outgoing line hole; 102, low-voltage area; 1021, secondary incoming line hole; 1022, secondary outgoing line hole; 1023, low-voltage box door; 110, partition; 120, first support; 121, second frame; 1211, first jack; 122, supporting plate; 130, second support; 131, first frame; 132, first bracket; 1321, supporting plate; 133, second bracket; 140, third support; 141, third frame; 1411, second jack; 150, fourth support; 160, high-voltage box door; 161, air inlet; 170, fan; 180, air conditioner; 191, fire detection device; 192, visual monitoring device; 210, soft start switch; 211, first vacuum contactor; 212, second vacuum contactor; 213, starting resistor; 220, electric reactor; 230, current transformer; 240, voltage transformer; 250, lightning arrester; 310, first control cabinet; 320, second control cabinet; 330, battery management system. DETAILED DESCRIPTION

[0040] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0041] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0042] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0043] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0044] The embodiment provides a grid-connected cabin, which is compact in structure, small in floor area and low in cost.

[0045] Specifically, as Figure 1 and Figure 2As shown, the grid-connected cabin includes a box body 100, a first support 120, a second support 130 and a third support 140. The box body 100 is provided with a partition plate 110, which is used to divide the box body 100 into a high-voltage area 101 and a low-voltage area 102. The first support 120 and the second support 130 are both arranged in the high-voltage area 101. The first support 120 is fixed with a reactor 220, and the second support 130 is fixed with a soft start switch 210, a current transformer 230 and a voltage transformer 240. The reactor 220 is connected with one end of the soft start switch 210, and the other end of the soft start switch 210 is connected with the current transformer 230. The voltage transformer 240 is connected in parallel with the soft start switch 210 and the current transformer 230. The third support 140 is arranged in the low-voltage area 102. The third support 140 is fixed with a first control cabinet 310, which is used to control an energy storage converter.

[0046] The grid-connected cabin provided by the embodiment divides the box 100 into the high-voltage area 101 and the low-voltage area 102 by arranging the partition plate 110 in the box 100, and arranges the high-voltage components in the high-voltage area 101 and the low-voltage components in the low-voltage area 102. Compared with the multi-cabinet structure in the prior art, the gap between the cabinets and the redundant frame structure are eliminated, the structural compactness is improved, and the occupied space is reduced. Moreover, it is convenient for maintenance personnel to repair the components in the high-voltage area 101 or the low-voltage area 102, and the failure of one area can be prevented from spreading to another area. In addition, the high-voltage components and the low-voltage components can be arranged according to actual needs, and compared with the integrated high-voltage switch cabinet and the low-voltage switch cabinet, unnecessary redundant components are saved, and the cost is greatly saved. The components are fixed by the first support 120, the second support 130 and the third support 140, the modularity of the components is realized, most of the assembly, wiring and debugging work can be completed in the factory, and the modular production and transportation are facilitated.

[0047] Optionally, continuing to refer to Figure 1 The cabinet door of the first control cabinet 310 is provided with a battery management system 330. By integrating the battery management system 330 on the cabinet door of the first control cabinet 310, compared with separately arranging a cabinet for the battery management system 330 in the prior art, the size of the box body 100 is reduced, and the maintenance of the battery management system 330 is facilitated.

[0048] Optionally, continuing to refer to Figure 1A fourth bracket 150 is also provided within the low-pressure zone 102. A second control cabinet 320 is fixed to the fourth bracket 150, and the second control cabinet 320 is used to control the energy management system. The fourth bracket 150 facilitates the assembly of the second control cabinet 320 with the enclosure 100. This facilitates the transportation and assembly of the second control cabinet 320; it also elevates the second control cabinet 320, improving heat dissipation; furthermore, the connection between the fourth bracket 150 and the enclosure 100 secures the second control cabinet 320 without requiring structural modifications, thus reducing costs.

[0049] Optionally, such as Figure 3 As shown, in one possible embodiment, the soft-start switch 210 includes a first vacuum contactor 211, a second vacuum contactor 212, and a starting resistor 213. Typically, the first vacuum contactor 211 and the starting resistor 213 are connected in series, and the second vacuum contactor 212 is connected in parallel across the first vacuum contactor 211 and the starter switch 213. Using the vacuum contactor 212 as the switch, compared to the prior art using a vacuum circuit breaker, reduces space requirements and saves costs while maintaining switching performance.

[0050] Further, see also Figure 3 and Figure 4 The second support 130 includes a first frame 131, a first bracket 132, and a second bracket 133. The first bracket 132 and the second bracket 133 are arranged vertically at intervals on the first frame 131. That is, the first support 130 has a multi-layer structure, which makes the first support 130 occupy a smaller area.

[0051] The first vacuum contactor 211 and the current transformer 230 are arranged on the first bracket 132 in a spaced manner, and the first vacuum contactor 211 is closer to the reactor 220 than the current transformer 230. The second vacuum contactor 212 and the voltage transformer 240 are arranged on the second bracket 133 in a spaced manner, and the second vacuum contactor 212 is closer to the reactor 220 than the voltage transformer 240. The starting resistor 213 is arranged on the first frame 131 on a side close to the reactor 220. In this arrangement, the electrical insulation distance between the first vacuum contactor 211, the second vacuum contactor 212, the starting resistor 213, the current transformer 230 and the voltage transformer 240 is ensured, and the space of the second bracket 130 is fully utilized, so that the occupied space is greatly reduced. Moreover, the arrangement considers the electrical connection relationship between the first vacuum contactor 211, the second vacuum contactor 212, the starting resistor 213, the current transformer 230, the voltage transformer 240 and the reactor 220, so that the first vacuum contactor 211, the second vacuum contactor 212, the starting resistor 213, the current transformer 230, the voltage transformer 240 and the reactor 220 can be connected through the shortest path, which is convenient for the arrangement of wires and reduces the cost of wires.

[0052] Optionally, continuing to refer to Figure 3 , the first frame 131 is provided with a lightning arrester 250 on a side close to the current transformer 230 and the voltage transformer 240. The lightning arrester 250 is connected in parallel with the current transformer 230 and the soft start switch 210. By arranging the lightning arrester 250 close to the current transformer 230 and the voltage transformer 240, the lightning arrester 250 can be connected in parallel with the current transformer 230 and the soft start switch 210 through the shortest path.

[0053] Figure 5 is a circuit diagram of the high-voltage area 101 in the grid-connected cabin. It can be understood that FV represents the lightning arrester 250, TA represents the current transformer 230, TV represents the voltage transformer 240, KM1 and KM2 respectively represent the first vacuum contactor 211 and the second vacuum contactor 212, R represents the starting resistor 213, and L represents the reactor 220. The grid-connected cabin uses the first vacuum contactor 211 and the second vacuum contactor 212 as the switching device of the main circuit and the soft start circuit. Compared with the prior art scheme using a vacuum circuit breaker, the grid-connected cabin has smaller occupied space and lower cost while ensuring reliable function.

[0054] Further, continuing to refer to Figure 4In one possible implementation, the first bracket 132 is provided with two spaced-apart support plates 1321, one of which is provided with the first vacuum contactor 211, and the other of which is provided with the current transformer 230. In this way, the current transformer 230 can be connected in series with the second vacuum contactor 212 on the second bracket 133 through the gap between the two support plates 1321, improving the regularity of wiring.

[0055] Optionally, if the second bracket 130 is made of metal material, the high-voltage components integrated on the second bracket 130 can be short-circuited due to the conductive property of the second bracket 130. Therefore, a plurality of insulators can be arranged on the second bracket 130, and the other end of the insulator is connected with the conductive row in the circuit to meet the requirement of insulation performance, and the insulator can also serve to fix the conductive row.

[0056] Optionally, as shown in Figure 6 The first bracket 120 includes a second frame 121 and a support plate 122 arranged on the top of the second frame 121. The reactor 220 is fixed on the top of the second frame 121 and the support plate 122. The first bracket 120 has simple structure and light weight, and the strength of the first bracket 120 is high by arranging the support plate 122 on the second frame 121. In addition, the second frame 121 and the support plate 122 jointly support the reactor 220, improving the stability of the installation of the reactor 220.

[0057] The side of the second frame 121 is provided with a first jack 1211 for cooperating with the fork plate of the forklift. When the grid-connected cabin is installed, the reactor 220 is first fixed on the first bracket 120, and then the fork plate of the forklift is inserted into the first jack 1211 on the second frame 121 to carry the first bracket 120 and the reactor 220 on the first bracket 120 into the high-voltage area 101. That is, the arrangement of the first jack 1211 facilitates the transportation and assembly of the reactor 220.

[0058] Optionally, continuing to refer to Figure 6 A support plate 122 with a suitable size can be selected according to the size of the reactor 220. A plurality of support plates 122 can also be arranged according to the size of the reactor 220, and the plurality of support plates 122 can be arranged at intervals, which is beneficial to heat dissipation of the reactor 220.

[0059] Further, as shown in Figure 7As shown, the third support 140 comprises a third frame 141. The first control cabinet 310 is fixed on the top of the third frame 141. The side of the third frame 141 is provided with a second insertion hole 1411, which is used to cooperate with the fork plate of the forklift. When the grid-connected cabin is installed, the first control cabinet 310 is first fixed on the third frame 141, and then the fork plate of the forklift is inserted into the second insertion hole 1211 on the third frame 141, so as to carry the third frame 141 and the first control cabinet 310 on the third frame 141 into the low-voltage area 102. That is, the second insertion hole 1211 is provided, which facilitates the transportation and assembly of the first control cabinet 310. Moreover, the third support 140 has simple structure, is convenient to process, and has low cost.

[0060] Optionally, continuing to refer to Figure 2 In the scheme that the fourth support 150 is further arranged in the low-voltage area 102, the structure of the fourth support 150 can be arranged in the same way as the third support 140. Since the fourth support 150 is used to fix the second control cabinet 320, the fourth support 150 has the same function as the third support 140. Arranging the structure of the fourth support 150 in the same way as the structure of the third support 140 can not only ensure that the fourth support 150 realizes its function, but also reduce the research and development and processing costs.

[0061] In the prior art, the incoming and outgoing lines of the grid-connected cabin of the cascade energy storage system are generally arranged at the bottom, which makes the concrete foundation at the bottom need to reserve a large space to facilitate the operation of the workers to connect the lines, and the connection difficulty and the construction difficulty are high.

[0062] As shown in Figure 8 and Figure 9 To solve this technical problem, the grid-connected cabin provided by the embodiment is provided with a first incoming line hole 1011 on one side wall of the cabinet 100 surrounding the high-voltage area 101, and a first outgoing line hole 1012 on the other side wall of the cabinet 100 surrounding the high-voltage area 101. The cabinet 100 is provided with a second incoming line hole 1021 and a second outgoing line hole 1022 on one side wall of the cabinet 100 surrounding the low-voltage area 102. This side outgoing line mode not only reduces the construction difficulty of the concrete foundation, but also reduces the connection difficulty. Moreover, since there are many components in the high-voltage area 101, the first incoming line hole 1011 and the first outgoing line hole 1012 are arranged on different side walls of the cabinet 100, which is beneficial to reasonable wiring and maintaining electrical insulation distance.

[0063] Further, continuing to refer to Figure 1 and Figure 8The box body 100 is further provided with a high-pressure box door 160 corresponding to the high-pressure area 101, the high-pressure box door 160 is provided with an air inlet 161, and a fan 170 corresponding to the air inlet 161 is arranged in the high-pressure area 101. It can be understood that the fan 170 can make the external cold air enter the high-pressure area 101 to cool the parts in the high-pressure area 101, because there is a certain interval between each part in the high-pressure area 101, and the heat quantity is not large, the cooling by the fan 170 can meet the demand while the cost is low.

[0064] The low-pressure area 102 is provided with an air conditioner 180. Because the heating elements in the first control cabinet 310 in the low-pressure area 102 are mostly circuit boards, the circuit board heating is concentrated, and the cooling demand is high, therefore, the air conditioner 180 with high refrigeration efficiency is adopted for cooling.

[0065] Optionally, the high-pressure box door 160 can be provided with two high-pressure box doors 160, the two high-pressure box doors 160 are oppositely arranged and divided into corresponding first supports 120 and second supports 130, each high-pressure box door 160 is provided with an air inlet 161, and each air inlet 161 is provided with a fan 170. In this way, the cold air entering from each air inlet 161 can be targeted to cool the parts on the first support 120 and the second support 130, and the heat exchange efficiency is high.

[0066] Optionally, in order to reduce the risk of dust entering the high-pressure area 101, an air inlet grille can be arranged at the air inlet 161.

[0067] Of course, the box body 100 can also be provided with a low-pressure box door 1023 corresponding to the low-pressure area 102, so that the maintenance personnel can open the low-pressure box door 1023 to enter the low-pressure area 102, and the maintenance of the parts in the low-pressure area 102 is facilitated.

[0068] Optionally, in the embodiment, the low-pressure box door 1023 is arranged on the front side and the rear side of the box body 100. In this way, the low-pressure area 102 can be entered from the front side and the rear side of the box body 100. Of course, in other embodiments, the arrangement mode of the low-pressure box door 1023 can also be other, which can be arranged according to actual needs, and the application is not limited in this regard.

[0069] Further, continuing to refer to Figure 2 The box body 100 is further provided with a high-pressure box door 160 corresponding to the high-pressure area 101, the high-pressure box door 160 is provided with an air inlet 161, and a fan 170 corresponding to the air inlet 161 is arranged in the high-pressure area 101. It can be understood that the fan 170 can make the external cold air enter the high-pressure area 101 to cool the parts in the high-pressure area 101, because there is a certain interval between each part in the high-pressure area 101, and the heat quantity is not large, the cooling by the fan 170 can meet the demand while the cost is low.

[0070] Optionally, the fire detector can be a smoke detection device, a temperature detection device, a flame detection device, etc., which can be set according to actual needs, and the application does not make specific limitations.

[0071] Further, continuing to refer to Figure 2 On the top of the box 100, the visual monitoring device 192 is arranged in the high-pressure area 101 and / or the low-pressure area 102. By arranging the visual monitoring device 192, on the one hand, the working state of each device can be remotely checked, and the efficiency and safety of daily inspection are improved; on the other hand, for the on-site maintenance personnel, the rear experts can remotely guide through the real-time video, which is beneficial to improve the maintenance efficiency; on the other hand, when receiving the alarm signal, the staff can first evaluate the situation inside the box 100 through the visual monitoring device 192, so as to avoid recklessly entering the dangerous environment under unknown circumstances, and the personal safety of the staff is improved.

[0072] It can be understood that the visual monitoring device 192 can be selected but is not limited to a network camera.

[0073] Optionally, an observation window can be arranged on the partition plate 110. By arranging the observation window on the partition plate 110, the maintenance personnel can observe the working condition of the components in the low-pressure area 102 through the observation window in the high-pressure area 101, or the maintenance personnel can observe the working condition of the components in the high-pressure area 101 through the observation window in the low-pressure area 102, that is, the maintenance personnel only need to enter one of the high-pressure area 101 or the low-pressure area 102, and the working condition of all components in the high-pressure area 101 and the low-pressure area 102 can be observed, and the working convenience of the maintenance personnel is improved.

[0074] The embodiment also provides a kind of cascade energy storage system, including link cabin and the grid-connected cabin described above.The electric reactor 220 in grid-connected cabin is electrically connected with the power module of link cabin.

[0075] The cascade energy storage system is low in cost, easy to maintain and small in space occupation due to the grid-connected cabin described above.

[0076] Obviously, the above embodiments of the utility model are only for clear illustration of the utility model, and are not limited to the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments are not required or can not be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A grid tie cabin, characterized in that, The utility model relates to a kind of energy storage transformer cabinet, including: Box (100), partition (110) is arranged in the box (100), the partition (110) is used to divide the box (100) into high-pressure area (101) and low-pressure area (102); First support (120) and second support (130) are arranged in the high-pressure area (101), the first support (120) is fixed with electric reactor (220), the second support (130) is fixed with soft start switch (210), current transformer (230) and voltage transformer (240), the electric reactor (220) is connected with one end of the soft start switch (210), the other end of the soft start switch (210) is connected with the current transformer (230), and the voltage transformer (240) is connected in parallel on the soft start switch (210) and the current transformer (230) branch; Third support (140) is arranged in the low-pressure area (102), and the third support (140) is fixed with first control cabinet (310), and the first control cabinet (310) is used to control energy storage converter.

2. The grid tie pod of claim 1, wherein, The second support (130) includes first frame (131), first bracket (132) and second bracket (133), the first bracket (132) and the second bracket (133) are spaced apart on the first frame (131) in vertical direction;The soft start switch (210) includes first vacuum contactor (211), second vacuum contactor (212) and starting resistance (213);The first vacuum contactor (211) and the current transformer (230) are spaced apart on the first bracket (132), the first vacuum contactor (211) is close to the electric reactor (220) relative to the current transformer (230), the second vacuum contactor (212) and the voltage transformer (240) are spaced apart on the second bracket (133), the second vacuum contactor (212) is close to the electric reactor (220) relative to the voltage transformer (240), and the starting resistance (213) is arranged on the side of the first frame (131) close to the electric reactor (220).

3. The grid tie pod of claim 2, wherein, The side of the first frame (131) close to the current transformer (230) and the voltage transformer (240) is provided with lightning arrester (250), and the lightning arrester (250) is connected in parallel on the soft start switch (210) and the current transformer (230) branch.

4. The grid tie pod of claim 1, wherein, The first support (120) includes second frame (121) and bracket (122) arranged on the top of the second frame (121), and the electric reactor (220) is fixed on the top of the second frame (121) and the bracket (122), the side of the second frame (121) is provided with first jack (1211), and the first jack (1211) is used to cooperate with the fork plate of forklift truck. And / or, the third support (140) comprises a third frame (141), the first control cabinet (310) is fixed on the top of the third frame (141), and the side of the third frame (141) is provided with a second jack (1411) used for cooperating with a fork plate of a forklift truck. And / or, the low-voltage area (102) is further provided with a fourth support (150), and a second control cabinet (320) used for controlling an energy management system is fixed on the fourth support (150). And / or, a battery management system (330) is arranged on a cabinet door of the first control cabinet (310).

5. The grid tie pod of claim 1, wherein, One side wall of the high-voltage area (101) surrounded by the box (100) is provided with a primary incoming line hole (1011), and the other side wall of the high-voltage area (101) surrounded by the box (100) is provided with a primary outgoing line hole (1012). The box (100) is further provided with a secondary incoming line hole (1021) and a secondary outgoing line hole (1022) on a side wall of the low-voltage area (102).

6. The grid tie pod of any of claims 1-5, wherein, The box (100) is further provided with a high-voltage box door (160) corresponding to the high-voltage area (101), the high-voltage box door (160) is provided with an air inlet (161), and a fan (170) corresponding to the air inlet (161) is arranged in the high-voltage area (101); and an air conditioner (180) is arranged in the low-voltage area (102).

7. The grid tie pod of any of claims 1-5, wherein, A fire-fighting detection device (191) is arranged in the high-voltage area (101) and / or the low-voltage area (102) on the top of the box (100).

8. The grid tie pod of any of claims 1-5, wherein, A visual monitoring device (192) is arranged in the high-voltage area (101) and / or the low-voltage area (102) on the top of the box (100).

9. The grid tie pod of any of claims 1-5, wherein, The partition plate (110) is provided with an observation window.

10. A cascaded energy storage system, characterized by The grid-connected cabin comprises a chain cabin and the grid-connected cabin according to any one of claims 1-9, and the reactor (220) in the grid-connected cabin is electrically connected with the power module of the chain cabin.

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