CN214176423U

CN214176423U - Wind power plant

Info

Publication number: CN214176423U
Application number: CN202023325900.3U
Authority: CN
Inventors: 郑新建; 刘彪; 刘胜先; 刘学林; 杨阳; 姜武
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: 2021-09-10
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a wind power plant, which comprises N box-type transformers; wherein, the high-voltage chambers of the M box-type transformers are provided with high-voltage switch boxes; 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 tapping box; the load switch is connected with a measurement and control device in the low-voltage chamber of the box-type transformer; wherein M is less than or equal to N; m is more than or equal to 1; and the measurement and control devices of the box-type transformers are communicated with the box-type transformer control system and the fan master control system. The utility model discloses load switch is connected with the measurement and control device of box transformer, is convenient for realize load switch's remote control through measurement and control device, has solved the inconvenient problem of prior art high-voltage switch box control.

Description

Wind power plant

Technical Field

The utility model relates to a wind power equipment specifically is a wind-powered electricity generation field.

Background

The scale of a wind power plant is larger and larger, a combined American high-voltage switch box is adopted in the wind power plant in the prior art, 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; because there is no electric mechanism, it can't carry out remote control to the high-voltage switch box, and the use is not changed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, it is not enough to prior art, provide a wind-powered electricity generation field, be convenient for carry out remote control to its high tension switchgear case.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a wind farm comprises N box-type transformers; wherein, the high-voltage chambers of the M box-type transformers are provided with high-voltage switch boxes; 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 tapping box; the load switch is connected with a measurement and control device in the low-voltage chamber of the box-type transformer; wherein M is less than or equal to N; m is more than or equal to 1; and the measurement and control devices of the box-type transformers are communicated with the box-type transformer control system and the fan master control system.

The utility model discloses a wind-powered electricity generation field adopts the high tension switchgear case that has load switch, and this load switch is connected with the measurement and control device of box transformer, is convenient for realize load switch's remote control, convenient to use through measurement and control device. Meanwhile, the load switch is convenient for electric control, and compared with the prior art, the load switch has the advantages of short switching operation time, relatively small switching workload and reliable 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.

In order to ensure that the grounding structure is stable and reliable in grounding, the bottom end of the flat steel is arranged in the cushion layer; the top end of the flat steel exceeds the cushion layer and is in contact with the box body.

In order to ensure the reliability of remote control, the measurement and control device of each box-type transformer is connected with an access switch; all the access switches are accessed into the convergence switch through optical cables; the convergence switch is connected with the main control system of the fan and the box transformer substation control system.

A UPS is arranged in the box body; the UPS power supply supplies power to the load switch. The UPS power supply is internally provided with an energy storage module, so that the load switch can be electrically switched on and off remotely and locally under the condition that no power grid is supplied within a certain time.

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

1. the utility model discloses load switch is connected with the measurement and control device of box transformer, is convenient for realize load switch's remote control through measurement and control device, has solved the inconvenient problem of prior art high-voltage switch case manipulation;

2. the utility model is convenient for electric control, and has the advantages of short switching operation time and reliable power supply compared with the prior art;

3. 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;

4. 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 block diagram of a circuit structure of a wind farm of the present invention;

fig. 2 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 wind farm of the present invention includes 3 box-type transformers (i.e., #1, #2 … … # N box-type transformer in fig. 1, model CEM 9000); wherein, 2 high-voltage chambers of the box-type transformer are provided with high-voltage switch boxes (if the cost is not considered, 3 box-type transformers can be provided with the high-voltage switch boxes); and the measurement and control devices of the box-type transformers are communicated with the box-type transformer control system and the fan master control system.

As shown in fig. 1, the measurement and control device of each box-type transformer is connected to an access switch (i.e., the fan ring network switch in fig. 1); all the access switches are connected into the convergence switch (namely the switch above the ring network switch of the air machine in fig. 1) through trunk optical cables; the convergence switch is connected with a main control system of the fan and a box-type substation control system (namely, the box-type substation system in fig. 1); each access switch is connected with a fan main control system (located on the side of the fan tower barrel).

As shown in fig. 2, 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); one end of the load switch QL is connected with the output end of the box type transformer, and the other end of the load switch QL is connected with the cable tapping box; the load switch QL is connected with a measurement and control device in the low-voltage chamber of the box-type transformer; 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. 2, 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 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. For the installation high tension switchgear, about 1 meter basic bed course is stretched out to band steel (top) for being convenient for, and the band steel bottom sets up in the bed course, guarantees that the structure is firm, and ground connection is reliable.

In this embodiment, the box passes through the basic bed course and sets up on the ground, and the connecting cable between load switch and the box transformer output, the 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 wind farm comprises N box-type transformers; the transformer is characterized in that high-voltage switch boxes are arranged in the high-voltage chambers of the M box-type transformers; 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 tapping box; the load switch is connected with a measurement and control device in the low-voltage chamber of the box-type transformer; wherein M is less than or equal to N; m is more than or equal to 1; and the measurement and control devices of the box-type transformers are communicated with the box-type transformer control system and the fan master control system.

2. A wind park according to claim 1, wherein the load switch is a three position switch.

3. The wind farm of claim 2, wherein the input side of the three-position switch 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. A wind park according to claim 1, wherein the box surface is provided with grounding means and the grounding means is in contact with the foundation surface.

5. A wind farm according to claim 4, characterised in that the earthing device is a flat steel laid on the surface of the box; the flat steel is laid on at least three surfaces of the box body, and the flat steel on the three surfaces is connected to form a whole.

6. A wind park according to claim 5, wherein the overlap length of the two interconnected flat steels is not less than 100 mm.

7. A wind farm according to claim 5, characterised in that the boxes are arranged on a bedding, which is laid on a foundation; 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.

8. A wind park according to claim 7, wherein the flat steel bottom end is arranged within the bedding; the top end of the flat steel exceeds the cushion layer and is in contact with the box body.

9. A wind farm according to any of claims 1 to 8, wherein the measurement and control device of each box transformer is connected to an access switch; all the access switches are accessed into the convergence switch through optical cables; the convergence switch is connected with the main control system of the fan and the box transformer substation control system.

10. A wind farm according to any of claims 1 to 8, wherein a UPS is arranged in the box body; the UPS power supply supplies power to the load switch.