CN214227369U

CN214227369U - High-voltage switch box and box-type transformer for wind power plant

Info

Publication number: CN214227369U
Application number: CN202023322559.6U
Authority: CN
Inventors: 刘彪; 郑新建; 刘胜先; 刘学林; 杨阳; 姜武; 邓攀
Original assignee: Hunan Clean Energy Branch Of Huaneng International Power Co ltd
Current assignee: Hunan Clean Energy Branch Of Huaneng International Power Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-17
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a high-voltage switch box and a box type transformer for a wind power plant, wherein the high-voltage switch box comprises a box body; a load switch is arranged in the box body; one end of the load switch is connected with the output end of the box type transformer, and the other end of the load switch is connected with the cable distribution box. The utility model discloses simple structure, high tension switchgear can manual control, also can control it with measurement and control device and switch over different stations to this realizes automatic control, and switching operation weak point consuming time, the power supply is reliable.

Description

High-voltage switch box and box-type transformer for wind power plant

Technical Field

The utility model relates to a wind power equipment, especially a high tension switchgear and box transformer.

Background

The wind power plant scale is getting bigger and bigger, the wind power plant in the prior art adopts the combined American high-voltage switch box, and in the actual production work, the combined American high-voltage switch box has no electric mechanism, so that the problems of long time consumption, large switching workload and poor power supply reliability in power failure and switching operation exist, and certain potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, it is not enough to prior art, provide a high tension switchgear and box transformer, solve prior art switching operation length consuming time, problem that the reliability of power supply is poor.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a high-voltage switch box comprises a box body; a load switch is arranged in the box body; one end of the load switch is connected with the output end of the box type transformer, and the other end of the load switch is connected with the cable distribution box.

The utility model discloses a high tension switchgear sets up load switch (electric machanism), compares prior art, has switching operation weak point consuming time, the reliable advantage of power supply.

The load switch is a three-position switch. The utility model discloses a three station is combined floodgate, separating brake and ground connection respectively, according to the operation requirement of difference, can set up load switch in the station of difference, has simplified the switching operation, has further improved the power supply reliability.

The input side of the three-position switch is connected with the first indicator lamp in parallel; and the output side of the three-position switch is connected with a second indicator light. The pilot lamp can instruct load switch's operating condition, instructs load switch work in which kind of station promptly, guarantees the power consumption safety. The pilot lamp can be installed in the box surface, and the operating personnel of being convenient for looks over.

In order to further ensure the use safety, the surface of the box body is provided with a grounding device, and the grounding device is in contact with the surface of the foundation.

The grounding device is flat steel laid on the surface of the box body; the flat steels are laid on at least three surfaces of the box body, and the flat steels on the three surfaces are connected to form a whole; the lap joint length of the two flat steels which are connected with each other is not less than 100 mm.

Therefore, the flat steel is simple to manufacture, and the attractiveness of the box body is not affected. And flat steel is laid on at least three surfaces and connected into a whole, so that counterattack faults caused by potential gradients in the case of lightning can be prevented. The lap length is not less than 100mm, so that reliable connection between the two flat steels can be ensured.

The box body is arranged on the foundation through a cushion layer; and the connecting cable between the load switch and the output end of the box-type transformer and the connecting cable between the load switch and the cable distribution box are laid in the foundation soil layer. The cable is laid in the soil layer, so that the influence of environmental factors on the cable can be avoided, the service life of the cable is prolonged, the cable can be prevented from being damaged, and the casualties of people and livestock caused by electric leakage are prevented.

The invention also provides a box type transformer for the wind power plant, and the high-voltage switch box is arranged on the high-voltage side of the box type transformer. The utility model discloses a box transformer has used above-mentioned high tension switchgear case, can greatly reduce switching work load.

The load switch is connected with the measurement and control device of the box-type transformer, so that the automatic control of the load switch is convenient to realize.

The utility model discloses in, can manually realize the switching of load switch station, also can utilize measuring and control device to realize the switching of load switch station, simple to use, convenient operation.

Compared with the prior art, the utility model discloses the beneficial effect who has does:

1. the utility model has simple structure, the high-voltage switch box can be manually controlled, and can also be controlled by a measurement and control device to switch different stations, thereby realizing automatic control, short time consumption of switching operation and reliable power supply;

2. an electric mechanism is adopted to replace the existing high-voltage switch box, a load switch in the high-voltage switch box is connected with a measurement and control device, and the measurement and control device sends a corresponding instruction to the high-voltage switch box, so that the load switch is switched to different stations, and the switching workload is greatly reduced;

3. the utility model discloses high tension switchgear sets up in the subaerial of box transformer high-pressure side, and the cable is buried underground in the soil horizon, has reduced the potential safety hazard.

Drawings

Fig. 1 is a circuit structure diagram of the box-type transformer of the embodiment of the present invention.

Detailed Description

As shown in fig. 1, the high-voltage switch box (i.e., the vacuum load switch cabin in fig. 1) of the embodiment of the present invention includes a load switch QL (three-position switch); the input side of the load switch QL is connected with the first indicator lamp L1 in parallel (the input end of the first indicator lamp L1 is connected with the energy storage capacitor 1 SQ), and the output side of the QL is connected with the second indicator lamp L2 (the input end of the L2 is connected with the energy storage capacitor 2 SQ). When the box-type transformer works normally, the QL is switched on, the first indicator lamp L1 is on, and the second indicator lamp L2 is on; when the measurement and control device detects the fault of the box-type transformer, the QL is switched off, the first indicator light L1 is on, and the second indicator light L2 is off; when the box transformer (hereinafter referred to as box transformer) needs to be overhauled, the QL is grounded, the first indicator light L1 is turned off, and the second indicator light L2 is turned off.

In this embodiment, the load switch QL is connected to the measurement and control device through a control cable. The manual operation part, the first indicator light and the second indicator light of the load switch QL are all arranged outside the box body.

Corresponding protective devices, such as fuses FU, are arranged in the high-voltage switch box.

As can be seen from fig. 1, the inlet side of the high-voltage switch box is connected with a transformer T1 (arranged in the box), the transformer T1 is connected with a fan, and the transformer T1 is connected with the self-electric equipment in the box transformer through a transformer T2 to supply power to the load in the box transformer body.

The utility model discloses in, the high tension switchgear case sets up in box transformer hyperbaric chamber. The measurement and control device is positioned in the low-voltage chamber of the box-type transformer. The load switch in the high-voltage switch box is connected with the measurement and control device in the low-voltage chamber through the control cable, the measurement and control device is used for switching the stations of the load switch, and the high-voltage switch box is convenient to remotely control.

The utility model discloses a make basis (bed course) again on high tension switchgear is close to case transformer substation basis one side to with the original cable dismantlement of case transformer get off and insert high tension switchgear (load switch), lay 35KV high tension cable (connecting cable) to box transformer hyperbaric chamber again in, and accomplish terminal preparation and relevant connection construction. The control cable is laid from the low-voltage chamber to realize that the measurement and control device carries out remote configuration control on the vacuum load switch, and the remote control system (namely the measurement and control device) of the box transformer substation is accessed to realize remote operation.

In this embodiment, a circle of ground flat steel is laid around the high-voltage switch box body (made of metal), the ground material used in the ground construction is required to be hot-galvanized flat steel, and the cross section of the flat steel is not less than 50 × 5 mm. The grounding resistance of the equipment is not more than 4 ohms, and the welding operation of the grounding grid construction is performed by professional personnel. The lapping length of the flat steel is not less than 100mm (the lapping length of two mutually connected flat steels is not less than 100 mm), at least three edges are welded, and the welding position is subjected to corrosion prevention treatment.

In this embodiment, the box passes through the basic bed course and sets up on the ground, load switch with connecting cable between the box transformer output, connecting cable between load switch and the cable distribution box all lay in the ground basic soil horizon. The foundation cushion layer is a 1SQ5 concrete cushion layer with the thickness of 100, and measures are taken to ensure the flatness of the surface of the cushion layer during the construction of the cushion layer. The bedding foundation bottom plate adopts C30 concrete.

Claims

1. A high-voltage switch box comprises a box body; it is characterized in that a load switch is arranged in the box body; one end of the load switch is connected with the output end of the box-type transformer, and the other end of the load switch is connected with the cable tapping box; the box body is arranged on the foundation through a cushion layer; and the connecting cable between the load switch and the output end of the box-type transformer and the connecting cable between the load switch and the cable distribution box are laid in the foundation soil layer.

2. The high voltage switch cabinet of claim 1, wherein said load switch is a three-position switch.

3. The high voltage switch box of claim 2, wherein the three position switch input side is connected in parallel with a first indicator light; and the output side of the three-position switch is connected with a second indicator light.

4. The high-voltage switch box according to any one of claims 1 to 3, wherein the surface of the box body is provided with a grounding device, and the grounding device is in contact with the surface of a foundation.

5. The high voltage switch cabinet of claim 4, wherein said grounding means is flat steel laid on the surface of said cabinet.

6. The high voltage switch box of claim 5, wherein said box body is lined with said flat steel on at least three surfaces, and said flat steel on said three surfaces are integrally connected.

7. A high-voltage switch cabinet according to claim 6, characterized in that the length of the overlap of two interconnected flat steels is not less than 100 mm.

8. A box-type transformer for a wind power plant, characterized in that a high-voltage switch box as claimed in any one of claims 1 to 7 is arranged on the high-voltage side of the box-type transformer.

9. The box-type transformer for the wind farm according to claim 8, wherein the load switch is connected with a measurement and control device of the box-type transformer.