CN221224794U - Power grid testing device - Google Patents

Abstract

The utility model provides a power grid testing device, wherein a first box body comprises a main control room and a power control room; the second box body comprises an auxiliary transformer chamber and an output control chamber, and the power control chamber is connected with the output control chamber through a cable; the third box body comprises a bypass switch chamber and a bypass wiring chamber, at least one bypass switch cabinet is arranged in the bypass switch chamber, the bypass switch cabinet is connected with the bypass wiring chamber through a cable, the power control chamber, the auxiliary transformer chamber and the output control chamber are all connected with the input end of the bypass wiring chamber through the cable, the switching terminal of the bypass wiring chamber is electrically connected with a power grid, and the bypass wiring chamber is electrically connected with power generation equipment through the cable. According to the scheme, the problem that the power generation equipment cannot normally operate when the detection device fails in the prior art is solved, and the number of cables between boxes is reduced through reasonable arrangement, so that the cost is effectively reduced, and the on-site operation and maintenance are facilitated.

Description

Power grid testing device

Technical Field

The utility model relates to the technical field of power grids, in particular to a power grid testing device.

Background

In recent years, along with the rapid development of the photovoltaic, energy storage and wind power generation industries, the adaptability of power generation equipment to a power grid is gradually improved, a plurality of containers are generally designed, the number of connecting cables between the containers is large, the on-site installation and maintenance are quite inconvenient, the labor and time cost are greatly occupied, the single container is oversized and overweight, the transportation is limited, and meanwhile, when the detection device fails, the problem that the power generation equipment cannot normally operate exists.

Disclosure of utility model

The utility model provides a power grid testing device, which at least solves the problem that power generation equipment cannot normally operate when a detecting device of the power grid testing device in the prior art fails.

In order to solve the problems, the utility model provides a power grid testing device, which comprises a first box body, a second box body and a third box body; the first box body comprises a main control room and a power control room, wherein the main control room is used for controlling and monitoring the running condition of the power grid testing device; the second box body comprises an auxiliary transformer chamber and an output control chamber, and the power control chamber is connected with the output control chamber through a cable; the third box includes bypass switch room and bypass wiring room, is equipped with at least one bypass switch cabinet in the bypass switch room, and bypass switch cabinet passes through cable and bypass wiring room to be connected, and power control room, auxiliary transformer room, output control room are all connected through cable and bypass wiring room, and the switching terminal and the electric wire netting electricity of bypass wiring room are connected, and bypass wiring room passes through cable and power generation facility electricity and is connected.

Further, the bypass switch room further comprises an output switch cabinet, and the output switch cabinet is connected with the bypass wiring room through a cable.

Further, the third box still includes material room and office, and the material room is located the bypass wiring room and keeps away from the one side of bypass switch room, and the office is located the bypass switch room and keeps away from the one side of bypass wiring room, and the material room is used for storing the material, and the office is used for supplying the staff work.

Further, the power control chamber comprises a power box switch chamber, a multi-winding transformer chamber and a power unit chamber, the power box switch chamber is connected with the input end of the bypass wiring chamber through a cable, the multi-winding transformer chamber is respectively connected with the power box switch chamber and the power unit chamber through cables, and the power unit chamber is connected with the output control chamber through the cable.

Further, an input switch cabinet is arranged in the switch cavity of the power box, a multi-winding transformer is arranged in the multi-winding transformer cavity, a plurality of power units and a plurality of reactors are arranged in the power unit cavity, the reactors are electrically connected with the power units in a one-to-one correspondence mode, primary windings of the multi-winding transformer are connected with the input switch cabinet through three-phase cables, the reactors are connected with secondary windings of the multi-winding transformer through the three-phase cables, transfer copper bars after cascade connection of the power units are electrically connected with the output control room through transfer terminals, and the transfer terminals of the input switch cabinet are connected with the input ends of the bypass wiring room through cables.

Further, the output control room includes output transformer cavity and output cavity, and output transformer cavity is located between output cavity and the auxiliary transformer room, and output transformer cavity passes through the cable and is connected with output cavity, and power control room passes through the cable and is connected with output transformer cavity, and output cavity passes through the input of cable and bypass wiring room and is connected, and the switching terminal of auxiliary transformer room passes through the input of cable and bypass wiring room and is connected.

Further, a plurality of single-phase transformers are arranged in the output transformer chamber, an output cabinet is arranged in the output chamber, a load switch, a fuse and a secondary line power supply transformer are arranged in the auxiliary transformer chamber, the fuse is electrically connected with the secondary line power supply transformer, the secondary line power supply transformer is electrically connected with the load switch, the load switch is electrically connected with the input end of the bypass wiring chamber through a switching terminal, the single-phase transformers are connected with the output cabinet through a cable, and the output cabinet is connected with the switching copper bar of the bypass wiring chamber through the cable.

Further, first box, second box and third box all are provided with multiunit air outlet, electric wire netting testing arrangement still includes the air outlet subassembly, the air outlet subassembly includes the air outlet shutter, the apron, rain-proof cloth, damping hinge and bracing piece, the air outlet shutter sets up in air outlet department, the apron is connected with the one end of damping hinge, the lateral wall at first box or second box or third box is installed to the other end of damping hinge, rain-proof cloth sets up on the apron, rain-proof cloth is used for sheltering from the side of air outlet, the one end and the apron sliding fit of bracing piece, the other end and the lateral wall sliding fit of first box or second box or third box of bracing piece are used for supporting the apron, damping hinge is used for adjusting the opening angle of apron.

Further, the first box body and the second box body are both provided with heat dissipation devices, and the heat dissipation devices are water cooling and/or air cooling devices.

Further, at least one opening device is arranged at the top of the first box body and the top of the second box body, and the opening device is detachably arranged so as to facilitate the disassembly and assembly of equipment in the first box body and the second box body.

By applying the technical scheme of the utility model, the power grid testing device comprises a first box body, a second box body and a third box body; the first box body comprises a main control room and a power control room, wherein the main control room is used for controlling and monitoring the running condition of the power grid testing device; the second box body comprises an auxiliary transformer chamber and an output control chamber, and the power control chamber is connected with the output control chamber through a cable; the third box body comprises a bypass switch chamber and a bypass wiring chamber, at least one bypass switch cabinet is arranged in the bypass switch chamber, the bypass switch cabinet is connected with the bypass wiring chamber through a cable, the power control chamber, the auxiliary transformer chamber and the output control chamber are all connected with the input end of the bypass wiring chamber through the cable, the switching terminal of the bypass wiring chamber is electrically connected with a power grid, and the bypass wiring chamber is electrically connected with power generation equipment through the cable. By adopting the scheme, through setting up bypass switch room and bypass wiring room in the third box, and be equipped with bypass switch cabinet in the bypass switch room, bypass switch cabinet all can be connected through cable and bypass wiring room, sets up like this, when first box or second box break down, the bypass switch cabinet in the accessible switch-on third box breaks down, breaks off the power control room in the first box simultaneously to bypass the electric wire netting testing arrangement of this scheme, thereby guaranteed power generation facility normal operating. Meanwhile, the bypass wiring chamber is independently arranged, so that the safety of operators in operation can be improved. By utilizing the power grid testing device, the problem that the power generation equipment cannot normally operate when the detection device fails in the power grid testing device in the prior art is effectively solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

Fig. 1 shows a schematic structural diagram of a power grid testing device according to an embodiment of the present utility model;

FIG. 2 is a schematic view showing the structure of the first case in FIG. 1;

FIG. 3 is a schematic view of the first housing of FIG. 2 at another angle;

FIG. 4 is a schematic view showing the structure of the second case in FIG. 1;

FIG. 5 shows a schematic view of the second housing of FIG. 4 at another angle;

FIG. 6 is a schematic view showing the structure of the third case in FIG. 1;

FIG. 7 is a schematic view of the third housing of FIG. 6 at another angle;

fig. 8 shows a schematic structural view of the air outlet assembly of fig. 1.

Wherein the above figures include the following reference numerals:

10. A first case; 11. a main control room; 12. a power control chamber; 121. a power box switch chamber; 1211. an input switch cabinet; 122. a multi-winding transformer chamber; 1221. a multi-winding transformer; 123. a power cell chamber; 1231. a power unit; 13. an air outlet; 14. an air inlet;

20. A second case; 21. an auxiliary transformation chamber; 22. an output control chamber; 221. an output transformer chamber; 2211. a single-phase transformer; 222. an output chamber; 2221. an output cabinet;

30. A third case; 31. a bypass switch chamber; 311. a bypass switch cabinet; 312. an output switch cabinet; 32. a bypass junction chamber; 33. a material chamber; 34. an office;

40. An air outlet assembly; 41. an air outlet shutter; 42. a cover plate; 43. rain-proof cloth; 44. damping hinges; 45. and (5) supporting the rod.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 8, an embodiment of the present utility model provides a power grid testing apparatus including a first casing 10, a second casing 20, and a third casing 30; the first box 10 comprises a main control room 11 and a power control room 12, wherein the main control room 11 is used for controlling and monitoring the running condition of the power grid testing device; the second box 20 comprises an auxiliary variable chamber 21 and an output control chamber 22, and the power control chamber 12 is connected with the output control chamber 22 through a cable; the third box 30 comprises a bypass switch chamber 31 and a bypass wiring chamber 32, at least one bypass switch cabinet 311 is arranged in the bypass switch chamber 31, the bypass switch cabinet 311 is connected with the bypass wiring chamber 32 through a cable, the power control chamber 12, the auxiliary transformer chamber 21 and the output control chamber 22 are all connected with the bypass wiring chamber 32 through cables, the switching terminal of the bypass wiring chamber 32 is electrically connected with a power grid, and the bypass wiring chamber 32 is electrically connected with power generation equipment through cables.

By adopting the scheme, through setting up bypass switch room 31 and bypass wiring room 32 in third box 30, and be equipped with bypass switch cabinet 311 in the bypass switch room 31, bypass switch cabinet 311 can all be connected through cable and bypass wiring room 32, sets up like this, when first box 10 or second box 20 break down, accessible switch on bypass switch cabinet 311 in the third box 30, disconnection power control room 12 in the first box 10 simultaneously to bypass the electric wire netting testing arrangement of this scheme, thereby guaranteed power generation facility normal operating. Meanwhile, the bypass wiring chamber 32 alone can improve the safety of the operator in operation. By utilizing the power grid testing device, the problem that the power generation equipment cannot normally operate when the detection device fails in the power grid testing device in the prior art is effectively solved.

The bypass switch chamber 31 further comprises an output switch cabinet 312, wherein the output switch cabinet 312 is connected with the bypass wiring chamber 32 through a cable.

It should be noted that: a plurality of bypass switch cabinets 311 can be arranged in the bypass switch chamber 31, so that a proper number of bypass switch cabinets 311 can be selected according to actual needs, and the selectivity of users is improved.

Alternatively, the first casing 10, the second casing 20 and the third casing 30 may each be a container, which is convenient for transportation. The cable may be a high voltage cable. The switch cabinets can all adopt high-voltage switch cabinets.

The output switch cabinet 312 is arranged in the bypass switch chamber 31, so that when the first box body 10 or the second box body 20 fails, the bypass switch cabinet 311 in the third box body 30 can be connected, and meanwhile, the power control chamber 12 and the output switch cabinet 312 in the first box body 10 are disconnected, so that the power grid testing device of the scheme is bypassed, and the normal operation of power generation equipment is ensured.

Specifically, the third box 30 further includes a material chamber 33 and an office 34, the material chamber 33 is located on a side of the bypass wiring chamber 32 away from the bypass switching chamber 31, the office 34 is located on a side of the bypass switching chamber 31 away from the bypass wiring chamber 32, the material chamber 33 is used for storing materials, and the office 34 is used for working by staff.

The material chamber 33 is arranged on one side of the bypass wiring chamber 32 away from the bypass switch chamber 31, so that the bypass wiring chamber 32 is convenient for wiring; an office 34 is provided and is located on the side of the bypass switch room 31 remote from the bypass wiring room 32, which facilitates the operator to view and operate the bypass switch room 31 in time.

In an embodiment not shown in the figures, the grid testing device further comprises a fourth container comprising a material compartment 33 and an office 34, the fourth container and the third container 30 being arranged side by side.

In the present embodiment, the power control chamber 12 includes a power box switch chamber 121, a multi-winding transformer chamber 122, and a power unit chamber 123, the power box switch chamber 121 is connected to the input end of the bypass wiring chamber 32 through a cable, the multi-winding transformer chamber 122 is connected to the power box switch chamber 121 and the power unit chamber 123 through cables, and the power unit chamber 123 is connected to the output control chamber 22 through a cable.

So configured, the on-off of the bypass junction box 32 can be controlled by the power box switch chamber 121; is adjusted to the desired voltage value according to the actual requirements by the multi-winding transformer chamber 122. Wherein the power box switch chamber 121 is connected to the input of the bypass junction box 32 by a 35KV cable.

The power box switch chamber 121 is internally provided with an input switch cabinet 1211, the multi-winding transformer chamber 122 is internally provided with a multi-winding transformer 1221, the power unit chamber 123 is internally provided with a plurality of power units 1231 and a plurality of reactors, the plurality of reactors are electrically connected with the plurality of power units 1231 in a one-to-one correspondence manner, a primary winding of the multi-winding transformer 1221 is connected with the input switch cabinet 1211 through a three-phase cable, the plurality of reactors are connected with a secondary winding of the multi-winding transformer 1221 through the three-phase cable, a transfer copper bar after cascade connection of the plurality of power units 1231 is electrically connected with the output control chamber 22 through a transfer terminal, and the transfer terminal of the input switch cabinet 1211 is connected with an input end of the bypass wiring chamber 32 through a cable.

With the above connection, the transfer terminal of the reactor is connected to the output control room 22 via the 10KV cable, and the transfer terminal of the input switch cabinet 1211 is connected to the input end of the bypass wiring room 32 via the 35KV cable. This enables the input switch cabinet 1211 to be used to control the on-off of the grid test device. In addition, the input switch cabinet 1211 and other power equipment are integrated into the first box body, so that the connection of cables is facilitated, the field wiring is reduced, and the maintenance time and cost are reduced; the power unit and the reactor are directly installed in the power unit chamber 123, so that the size of the first box body is reduced, the transportation is convenient, and the cost is reduced.

In the present embodiment, the output control chamber 22 includes an output transformer chamber 221 and an output chamber 222, the output transformer chamber 221 is located between the output chamber 222 and the auxiliary chamber 21, the output transformer chamber 221 is connected to the output chamber 222 through a cable, the power control chamber 12 is connected to the output transformer chamber 221 through a cable, the output chamber 222 is connected to the input end of the bypass wiring chamber 32 through a cable, and the switching terminal of the auxiliary chamber 21 is connected to the input end of the bypass wiring chamber 32 through a cable.

The switching terminals of the auxiliary transformer chamber 21 are connected to the input end of the bypass wiring chamber 32 by means of 35KV cables, wherein 1 load switch, a fuse combination electrical cabinet and 1 auxiliary transformer are arranged in the auxiliary transformer chamber 21.

Wherein, be equipped with a plurality of single-phase transformers 2211 in the output transformer cavity 221, be equipped with output cabinet 2221 in the output cavity 222, be equipped with load switch in the auxiliary transformer room 21, fuse and secondary line power supply transformer electricity are connected, secondary line power supply transformer and load switch electricity are connected, load switch passes through the switching terminal and is connected with the input electricity of bypass wiring room 32, single-phase transformer 2211 passes through the cable and is connected with output cabinet 2221, output cabinet 2221 passes through the switching copper bar of cable and bypass wiring room 32 and is connected.

So configured, the on-off between the output chamber 222 and the bypass wiring chamber 32 can be controlled by the output cabinet 2221; meanwhile, the load switch can be utilized to conveniently control the on-off of the secondary line power supply transformer.

Specifically, the first box 10, the second box 20 and the third box 30 are provided with a plurality of groups of air outlets 13 and a plurality of groups of air inlets 14, the plurality of groups of air outlets 13 and the plurality of groups of air inlets 14 are arranged in a one-to-one correspondence manner, and the air inlets 14 are provided with shutters.

The plurality of groups of air outlets 13 and the plurality of groups of air inlets 14 are arranged, and the plurality of groups of air outlets 13 and the plurality of groups of air inlets 14 are arranged in a one-to-one correspondence manner, so that the heat dissipation of the first box 10, the second box 20 and the third box 30 is facilitated; and the air inlet 14 is provided with a shutter, so that the protection level of the air inlet 14 is improved.

The power grid testing device further comprises an air outlet assembly 40, the air outlet assembly 40 comprises an air outlet shutter 41, a cover plate 42, a waterproof cloth 43, a damping hinge 44 and a supporting rod 45, the air outlet shutter 41 is arranged at the air outlet 13, one ends of the cover plate 42 and the damping hinge 44 are connected, the other ends of the damping hinge 44 are arranged on the side wall of the first box body 10 or the second box body 20 or the third box body 30, the waterproof cloth 43 is arranged on the cover plate 42, the waterproof cloth 43 is used for shielding the side face of the air outlet 13, one end of the supporting rod 45 is in sliding fit with the cover plate 42, the other end of the supporting rod 45 is in sliding fit with the side wall of the first box body 10 or the second box body 20 or the third box body 30, the supporting rod 45 is used for supporting the cover plate 42, and the damping hinge 44 is used for adjusting the opening angle of the cover plate 42.

So set up, when electric wire netting testing arrangement operates, open apron 42, can adjust the arbitrary angle of apron 42 through damping hinge 44, the angle is less, and rain-proof performance is better, when meetting very big weather of wind-force, can adopt bracing piece 45 as auxiliary stay, keeps apron 42 open state, forms good heat dissipation passageway, when electric wire netting testing arrangement shut down, close apron 42, can play totally sealed, satisfies high protection demand.

Alternatively, one end of the support bar 45 is hinged with the cover plate 42, and the other end of the support bar 45 is slidably fitted with the side wall of the first casing 10 or the second casing 20 or the third casing 30.

Alternatively, the support rod 45 may be detachably provided.

Wherein, the shutter shape of the air inlet is a double S structure, and the shutter 41 of the air outlet is an L-shaped structure.

Specifically, the first case 10 and the second case 20 are both provided with a heat dissipating device, and the heat dissipating device is a water cooling and/or air cooling device.

By the arrangement, the heat dissipation effect of the first box body 10 and the second box body 20 can be improved, and stable operation of equipment in the first box body 10 and the second box body 20 is ensured.

Optionally, the power unit chamber is located between the multi-winding transformer chamber and the main control chamber, and the power box switch chamber is located on a side of the multi-winding transformer chamber remote from the power unit chamber.

Specifically, at least one opening device is provided on the top of the first casing 10 and the top of the second casing 20, and the opening device is detachably provided to facilitate the disassembly and assembly of the devices in the first casing 10 and the second casing 20.

This arrangement facilitates the disassembly and assembly of the equipment within the first and second housings 10, 20.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The power grid testing device is characterized by comprising a first box body (10), a second box body (20) and a third box body (30);

The first box body (10) comprises a main control room (11) and a power control room (12), wherein the main control room (11) is used for controlling and monitoring the running condition of the power grid testing device;

The second box body (20) comprises an auxiliary variable chamber (21) and an output control chamber (22), and the power control chamber (12) is connected with the output control chamber (22) through a cable;

The third box (30) comprises a bypass switch chamber (31) and a bypass wiring chamber (32), at least one bypass switch cabinet (311) is arranged in the bypass switch chamber (31), the bypass switch cabinet (311) is connected with the bypass wiring chamber (32) through a cable, the power control chamber (12) is connected with the auxiliary transformer chamber (21) through the cable, the output control chamber (22) is connected with the bypass wiring chamber (32), the bypass wiring chamber (32) is electrically connected with a power grid, and the bypass wiring chamber (32) is electrically connected with power generation equipment through the cable.

2. The grid test device according to claim 1, characterized in that the bypass switch room (31) further comprises an output switch cabinet (312), the output switch cabinet (312) being connected to the bypass wiring room (32) by means of a cable.

3. The grid test device according to claim 1, characterized in that the third box (30) further comprises a material chamber (33) and an office (34), the material chamber (33) being located on a side of the bypass switch chamber (32) remote from the bypass switch chamber (31), the office (34) being located on a side of the bypass switch chamber (31) remote from the bypass switch chamber (32), the material chamber (33) being for storing material, the office (34) being for working by staff.

4. The grid test device according to claim 1, characterized in that the power control chamber (12) comprises a power box switch chamber (121), a multi-winding transformer chamber (122) and a power unit chamber (123), the power box switch chamber (121) being connected by a cable to the input of the bypass wiring chamber (32), the multi-winding transformer chamber (122) being connected by a cable to the power box switch chamber (121), the power unit chamber (123) respectively, the power unit chamber (123) being connected by a cable to the output control chamber (22).

5. The power grid testing device according to claim 4, wherein an input switch cabinet (1211) is arranged in the power box switch chamber (121), a multi-winding transformer (1221) is arranged in the multi-winding transformer chamber (122), a plurality of power units (1231) and a plurality of reactors are arranged in the power unit chamber (123), the plurality of reactors and the plurality of power units (1231) are electrically connected in a one-to-one correspondence manner, a primary winding of the multi-winding transformer (1221) is connected with the input switch cabinet (1211) through a three-phase cable, the plurality of reactors are connected with a secondary winding of the multi-winding transformer (1221) through three-phase cables, transfer copper bars after cascade connection of the plurality of power units (1231) are electrically connected with the output control chamber (22) through transfer terminals, and transfer terminals of the input switch cabinet (1211) are connected with input ends of the bypass wiring chamber (32) through cables.

6. The grid test device according to claim 1, characterized in that the output control chamber (22) comprises an output transformer chamber (221) and an output chamber (222), the output transformer chamber (221) being located between the output chamber (222) and the auxiliary chamber (21), the output transformer chamber (221) being connected by a cable to the output chamber (222), the power control chamber (12) being connected by a cable to the output transformer chamber (221), the output chamber (222) being connected by a cable to an input of the bypass connection chamber (32), and the changeover terminal of the auxiliary chamber (21) being connected by a cable to an input of the bypass connection chamber (32).

7. The power grid testing device according to claim 6, wherein a plurality of single-phase transformers (2211) are arranged in the output transformer chamber (221), an output cabinet (2221) is arranged in the output chamber (222), a load switch, a fuse and a secondary line power supply transformer are arranged in the auxiliary transformer chamber (21), the fuse is electrically connected with the secondary line power supply transformer, the secondary line power supply transformer is electrically connected with the load switch, the load switch is electrically connected with an input end of the bypass wiring chamber (32) through a transfer terminal, the single-phase transformers (2211) are connected with the output cabinet (2221) through a cable, and the output cabinet (2221) is connected with a transfer copper bar of the bypass wiring chamber (32) through the cable.

8. The power grid testing device according to claim 1, wherein the first box (10), the second box (20) and the third box (30) are provided with a plurality of groups of air outlets (13), the power grid testing device further comprises an air outlet assembly (40), the air outlet assembly (40) comprises an air outlet shutter (41), a cover plate (42), a waterproof cloth (43), a damping hinge (44) and a support rod (45), the air outlet shutter (41) is arranged at the air outlet (13), the cover plate (42) is connected with one end of the damping hinge (44), the other end of the damping hinge (44) is arranged on the side wall of the first box (10) or the second box (20) or the third box (30), the waterproof cloth (43) is arranged on the cover plate (42), the waterproof cloth (43) is used for shielding the side surface of the air outlet (13), one end of the support rod (45) is in sliding fit with one end of the cover plate (42), the other end of the support rod (45) is in sliding fit with the support rod (45) or the side wall of the second box (20) or the third box (30), the damping hinge (44) is used for adjusting the opening angle of the cover plate (42).

9. The power grid testing device according to claim 1, wherein the first box (10) and the second box (20) are both provided with heat dissipation devices, which are water-cooled and/or air-cooled devices.

10. Grid test device according to claim 1, characterized in that the top of the first box (10) and the top of the second box (20) are each provided with at least one opening device, which is detachably arranged for easy dismounting of the equipment in the first box (10) and the second box (20).