CN203367763U - 35kV, SF6 inflatable switchgear for wind power - Google Patents

Abstract

_The utility model discloses a 35kV SF ₆ inflatable switchgear dedicated to wind power, comprising: a cable transfer cabinet, a load switch _cabinet and a vacuum circuit breaker cabinet. A circuit breaker, an isolating switch, and a grounding switch are connected in sequence from top to bottom in the box. The aforementioned circuit breaker is connected to a pre-installed cable head, and the aforementioned grounding switch is connected to the cable head in the cable room through the cable busbar; the aforementioned vacuum circuit breaker cabinet is set There is a photoelectric conversion interface. The utility model is beneficial in that: since the vacuum circuit breaker, isolating switch, and grounding switch are placed in the SF ₆ inflatable box, the switchgear of the utility model is small in size and can be directly installed as a whole through the tower door without disassembly ;Simple structure, complete protection, basically maintenance-free, and can be freely combined into a variety of wiring schemes, and can realize remote monitoring and control of the 35kV system of the entire wind farm through the optical fiber network.

Description

35kV, SF6 inflatable switchgear for wind power

technical field

The utility model relates to a switchgear, in particular to a 35kV, SF ₆ inflatable switchgear for wind power installed in a fan tower, and belongs to the technical field of electric appliance manufacturing.

Background technique

The existing wind power switchgear installed in the wind turbine tower has a large volume and usually cannot pass through the tower door as a whole. It needs to be disassembled and then assembled. The operation is troublesome, not only time-consuming and laborious, but also has a high failure rate. , and the maintenance workload during the operation period is also relatively large. In addition, the existing switchgear has complex wiring, cannot realize the combination of various wiring schemes, and has single protection, so the application has relatively large limitations. Therefore, it is necessary to improve the structure of the existing switchgear. the

Utility model content

In order to solve the deficiencies of the existing technology, the purpose of this utility model is to provide a 35kV, SF ₆ inflatable switchgear for wind power that is small in size, does not need to be disassembled and can be freely combined into various wiring schemes.

In order to achieve the above goals, the utility model adopts the following technical solutions:

A 35kV, SF ₆ inflatable switchgear dedicated to wind power, including: a cable transfer cabinet, a vacuum circuit breaker cabinet, characterized in that the aforementioned vacuum circuit breaker cabinet includes: a vacuum circuit breaker cabinet body, which is arranged on the vacuum circuit breaker cabinet body The upper microcomputer comprehensive protection device is set in the SF ₆ air box in the middle of the vacuum circuit breaker cabinet. The top of the vacuum circuit breaker cabinet is the low-voltage room and the bottom is the cable room. The aforementioned SF ₆ air box is in order from top to bottom A circuit breaker, an isolating switch, and a grounding switch are connected, and a pre-installed cable head is connected to the circuit breaker, and the grounding switch is connected to the cable head in the cable room through a cable bus.

The aforementioned 35kV, SF ₆ inflatable switchgear dedicated to wind power is characterized in that it also includes: a load switchgear, and the load switchgear is connected between the cable transfer cabinet and the vacuum circuit breaker cabinet through cables.

The aforementioned 35kV, SF ₆ inflatable switchgear dedicated to wind power is characterized in that the aforementioned load switchgear includes: a load switch cabinet body, a load switch and a fuse arranged in the load switch cabinet body, connected to the aforementioned load switch and fuse The operating mechanism; the aforementioned load switch is connected to a pre-installed cable head, and the aforementioned fuse is connected to the cable head at the bottom of the load switch cabinet through the cable busbar.

The aforementioned 35kV, SF ₆ inflatable switchgear dedicated to wind power is characterized in that a 35kV pre-installed lightning arrester is connected to the aforementioned vacuum circuit breaker cabinet.

The aforementioned 35kV, SF ₆ inflatable switchgear dedicated to wind power is characterized in that the aforementioned vacuum circuit breaker cabinet is provided with a photoelectric conversion interface, and the aforementioned photoelectric conversion interface is connected to the computer monitoring system through an optical fiber network.

The utility model is beneficial in that: because the vacuum circuit breaker, isolating switch, grounding switch and other switchgears are placed in the SF ₆ inflatable box, the switchgear of the utility model is small in size and can be directly installed as a whole through the tower door , no need to disassemble, which solves the problem that the 35kV switchgear occupies a large area and cannot realize the fan booster variable 35kV side on (on) off (on) control in the fan tower; the structure is simple, the protection is complete, and it can basically be done It is maintenance-free and can be freely combined into a variety of wiring schemes. It can realize the remote monitoring and control of the 35kV system of the entire wind farm through the optical fiber network, especially suitable for the protection and control of the 35kV side of offshore wind turbines.

Description of drawings

Fig. 1 is a structural schematic diagram of a specific embodiment of the vacuum circuit breaker cabinet in the 35kV dedicated to wind power, SF ₆ inflatable switchgear of the present utility model;

Fig. 2 is a structural schematic diagram of a specific embodiment of the load switchgear in the 35kV, SF ₆ inflatable switchgear dedicated to wind power of the present utility model;

Fig. 3 is a kind of wiring scheme of the wind power dedicated 35kV, SF ₆ inflatable switchgear of the utility model;

Fig. 4 is another wiring scheme of the wind power dedicated 35kV, SF ₆ inflatable switchgear of the present invention.

The meanings of reference marks in the figure: 1-cable transfer cabinet, 2-vacuum circuit breaker cabinet, 201-vacuum circuit breaker cabinet body, 202-microcomputer integrated protection device, 203-SF ₆ gas box, 204-low voltage room, 205-cable room, 206-circuit breaker, 207-isolating switch, 208-grounding switch, 209-pre-installed cable head, 210-cable busbar, 211-cable head, 3-load switch cabinet, 301-load switch cabinet Body, 302-load switch, 303-fuse, 304-operating mechanism, 305-cable busbar, 306-cable head.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is made concrete introduction. the

Referring to Fig. 1 and Fig. 3, the 35kV, SF ₆ inflatable switch cabinet for wind power of the present utility model includes: a cable transfer cabinet 1 and a vacuum circuit breaker cabinet 2. Among them, the vacuum circuit breaker cabinet 2 includes: a vacuum circuit breaker cabinet body 201, a microcomputer integrated protection device 202 arranged on the upper part of the vacuum circuit breaker cabinet body 201, and an SF ₆ gas tank 203 arranged in the middle part of the vacuum circuit breaker cabinet body 201 , the top of the vacuum circuit breaker cabinet body 201 is a low-voltage chamber 204, and the bottom is a cable chamber 205; the SF ₆ gas tank 203 is connected with a circuit breaker 206, an isolating switch 207, and a grounding switch 208 in sequence from top to bottom, wherein the circuit breaker 206 is connected with a pre-installed cable head 209, the pre-installed cable head 209 is connected to the cable transition cabinet through the cable, the grounding switch 208 is connected to the cable head 211 in the cable room 205 through the cable busbar, and the cable head in the cable room 205 211 is connected with the fan transformer through a cable, which is a wiring scheme of the wind power dedicated 35kV, SF ₆ inflatable switchgear of the utility model.

Since the vacuum circuit breaker 206, isolating switch 207, grounding switch 208 and other switching devices are placed in the SF ₆ inflatable box, the SF ₆ gas has high dielectric strength and good arc extinguishing performance, and is 2- 3 times, and the insulation strength is equivalent to that of transformer oil at 3 atmospheric pressures. Therefore, the switchgear of the utility model can be made to be small in size, and can be installed directly through the tower door without disassembly, which solves the problem of occupying an area of 35kV switchgear The area is large, and it is difficult to realize the fan booster variable 35kV side on (on) off (off) control in the fan tower.

As a preferred solution, the 35kV, SF ₆ inflatable switchgear dedicated to wind power of the present utility model also includes: a load switchgear 3 .

2, the load switch cabinet 3 includes: a load switch cabinet body 301, a load switch 302 and a fuse 303 arranged in the load switch cabinet body 301, and an operating mechanism 304 connected with the load switch 302 and the fuse 303. Among them, the load switch 302 is connected with a pre-installed cable head (not shown), and the pre-installed cable head is used to connect with the cable transfer cabinet; the fuse 303 is connected to the cable at the bottom of the load switch cabinet 301 through the cable bus 305 The head 306 is connected, and the cable head 306 is used to connect with the fan transformer. the

Referring to Fig. 4, the load switch cabinet 3 is connected between the cable transfer cabinet and the vacuum circuit breaker cabinet through cables. Among them, the other interface of the cable transfer cabinet is connected to the cable line, the other interface of the load switch cabinet 3 is connected to the cable line, and the cable head in the cable chamber 205 of the vacuum circuit breaker cabinet is still connected to the fan transformer through the cable. Another wiring scheme for the new wind power dedicated 35kV, SF ₆ inflatable switchgear.

It can be seen that the switchgear of the utility model is not only simple in wiring, but also can be freely combined into various wiring schemes, with comprehensive protection and wider application range. the

In order to improve the use safety of the switch cabinet of the present utility model, as a preferred solution, a 35kV pre-installed lightning arrester (not shown) is connected to the vacuum circuit breaker cabinet. the

As a preferred solution, the vacuum circuit breaker cabinet of the switchgear of the present utility model is provided with a photoelectric conversion interface (not shown), and the photoelectric conversion interface is connected to the computer monitoring system through an optical fiber network, thereby realizing the control of the 35kV system of the entire wind farm. Remote monitoring and control, especially suitable for the protection and control of the 35kV side of offshore wind turbines. the

It should be noted that the above-mentioned embodiments do not limit the utility model in any form, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the utility model. the

Claims (5)

1. special-purpose 35kV, SF of wind-powered electricity generation ₆inflating switch cabinet comprises: Splices cable cabinet, vacuum circuit breaker cabinet; it is characterized in that; above-mentioned vacuum circuit breaker cabinet comprises: the vacuum circuit breaker cabinet cabinet, be arranged on the computer integrated protection on vacuum circuit breaker cabinet cabinet top, and be arranged on the SF at vacuum circuit breaker cabinet cabinet middle part ₆gas tank, the top of vacuum circuit breaker cabinet cabinet is that low-pressure chamber, bottom are cable vault, above-mentioned SF ₆be connected with from top to bottom circuit breaker, isolating switch, earthed switch in gas tank in turn, be connected with the prepackage type cable end on above-mentioned circuit breaker, above-mentioned earthed switch is connected with the cable end in cable vault by cable bus.

2. special-purpose 35kV, SF of wind-powered electricity generation according to claim 1 ₆inflating switch cabinet, is characterized in that, also comprises: loading switch cabinet, above-mentioned loading switch cabinet is connected between Splices cable cabinet and vacuum circuit breaker cabinet by cable.

3. special-purpose 35kV, SF of wind-powered electricity generation according to claim 2 ₆inflating switch cabinet, is characterized in that, above-mentioned loading switch cabinet comprises: load switch cabinet body is arranged on on-load switch and fuse in load switch cabinet body, the operating mechanism be connected with fuse with above-mentioned on-load switch; Be connected with the prepackage type cable end on above-mentioned on-load switch, above-mentioned fuse is connected with the cable end of load switch cabinet body bottom by cable bus.

4. special-purpose 35kV, SF of wind-powered electricity generation according to claim 1 ₆inflating switch cabinet, is characterized in that, above-mentioned vacuum circuit-breaker is connected with 35kV prepackage type lightning arrester cashier's office in a shop.

5. according to the described wind-powered electricity generation of claim 1 to 4 any one special-purpose 35kV, SF ₆inflating switch cabinet, is characterized in that, above-mentioned vacuum circuit-breaker is provided with photoelectric conversion interface cashier's office in a shop, and above-mentioned photoelectric conversion interface is connected with computer supervisory control system by optical networking.

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