35kv wind power-used compact pre-fabricated substation structure

Abstract

The invention relates to a 35kV wind power-used compact pre-fabricated substation structure transformer field. The 35kV wind power-used compact pre-fabricated substation structure is composed of a shell, a high and low-voltage power transformation device, a transformer, and a solar photovoltaic power generation system, wherein the shell is provided with a high-voltage room, a cable room, a maintenance room and a low-voltage room; radiators of the transformer and the transformer body are exposed outside the box body; high-voltage wire outgoing of the transformer adopts a pure porcelain bushing and is arranged on an outer large steel plate of a transformer connection flange surface; four low-voltage wire outgoing bushings also adopt pure porcelain bushings, are adjacent to the high-voltage bushing group and are vertically arranged, and are connected with the low-voltage cabinet by using a copper busbar. A high-voltage AC isolation vacuum load switch-fuse combined electric appliance transformation device is adopted for the high voltage. The top cover of the pre-fabricated substation is provided with solar panels for providing an operating power supply for the high and low-voltage switch, necessary actions of the high and low-voltage switch in any condition can be ensured, the device reliability is improved, the service life of the pre-fabricated substation is prolonged, the occupied area and the use space are saved, the investment cost is reduced, and the pre-fabricated substation structure design is particularly suitable for high cold and dry and hot climates in a northern region.

Description

Technical field [0001] The 35kV wind power box variable structure of the invention belongs to the field of transformers. Background technique [0002] In the prior art, 35kV wind power transformers are divided into pre-installed substations and wind power combined transformers, and there is also a 35kV wind power combined box transformer structure that is easy to operate and maintain. The prefabricated substation is divided into three independent parts: high-voltage room, low-voltage room and transformer room, and assembled in a housing with a certain degree of protection. The high-voltage adopts the user's internal high-voltage AC isolation vacuum load switch-fuse combination electrical appliance, which is large in size. , The cost is high, and the heat dissipation of the transformer is affected; the load switches and fuses used in the high-voltage protection of the combined transformer are all oil-immersed. During use, the action of the oil-immersed switches will generate arcs,...

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Problems solved by technology

The prefabricated substation is divided into three independent parts: high-voltage room, low-voltage room and transformer room, which are assembled in a shell with a certain degree of protection. , the cost is high, and the heat dissipation of the transformer is affected; the load switches and fuses used in the high-voltage protection of the combined transformer are all oil-immersed. If it bursts, it will completely pollute the transformer oil and affect the life of the transformer

In addition, it is a 35kV wind power combined box-type transformer structure that is easy to operate and maintain. The outlet bushing of the transformer and the high-voltage AC isolation vacuum load switch-fuse combination copper bar wiring are connected at 90°, which requires a large space for wiring, and The connection is difficult and time-consuming. On the other hand, its oil level gauge, oil pressure gauge, oil filling valve, and oil temperature gauge are installed on the front panel of the transformer. It is inconvenient to open the gauge chamber when viewing

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