Underground power transmission network line transformer zone area

Abstract

The invention discloses an underground power transmission network line transformer zone area. The underground power transmission network line transformer zone area comprises a high-low voltage module chamber and a transformer chamber fixedly installed at the top of the high-low voltage module chamber; a high-voltage chamber and a low-voltage chamber are arranged in the high-low voltage module chamber side by side; a high-voltage cabinet and a manhole are arranged in the high-voltage chamber; a low-voltage cabinet is arranged in the low-voltage chamber; an oil-immersed transformer is arranged in the transformer chamber; the oil-immersed transformer is of a bottom-in and bottom-out structure; the output end of the high-voltage cabinet is electrically connected with a high-voltage lead connector of the oil-immersed transformer through a high-voltage cable; a low-voltage lead connector and a low-voltage zero-phase connector of the oil-immersed transformer are electrically connected with the input end of the low-voltage cabinet through wires respectively; and the high-voltage lead connector, the low-voltage lead connector and the low-voltage zero-phase connector are all manufactured by adopting a standard insulation full-touch electric process. The underground power transmission network line transformer zone area has the advantages of reasonable layout, simple structure, convenience in transportation, low maintenance cost, small occupied area, small occupied space and the like, and can be widely applied to construction of underground power transmission network line transformer zone areas in various large, medium and small cities.

Description

technical field [0001] The invention belongs to the technical field of power supply and distribution, and more specifically relates to an underground power transmission network substation station area. Background technique [0002] At present, most power distribution systems are box-type substations composed of high-voltage rooms, transformer rooms, and low-voltage rooms. The high-voltage room is responsible for introducing power, and the transformer room is responsible for changing high voltage into low voltage, or changing low voltage into high voltage The low-voltage room is responsible for distributing electric energy to users and compensating power factor. In traditional box-type substations, the transformer room, high-voltage room and low-voltage room are generally arranged side by side. Since each room occupies a large area, it takes up a lot of space. Especially in some large and medium-sized cities, it can be said that land is very expensive. The overhead power gri...

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Problems solved by technology

Not only does it need to be protected by lightning arresters, but there are also disadvantages such as scattered combinations, messy wiring, inconvenient maintenance, unguaranteed power supply quality, exposed high and low voltage bushings, messy high and low voltage cables, and extremely inconvenient daily monitoring and maintenance, which not only easily cause electric shocks Huge manpower and financial resources are invested in the operation and maintenance management of pole-mounted substation stations, and power outages for distribution transformers and accessories often involve power outages on the main line, which has a relatively large impact on distribution network reliability index management and customer service. Big

Especially now that underground power grids are generally laid in large and medium-sized cities, which beautifies the city appearance, but when building substation stations, it is necessary to lead the underground high-voltage cables to the air through poles, and then connect them to the high-voltage leads of the transformer, which is not only troublesome and time-consuming to install It takes a lot of labor and wastes materials, and the high and low voltage lead bushings of the transformer are still exposed, which poses a safety hazard

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