330-kv high-resistance circuit for high-altitude area

Abstract

The invention provides a 330-kV high-resistance circuit for a high-altitude area. The 330-kV high-resistance circuit is composed of a GIS (Geographic Information System), a lightning arrester, a high resistor and lead wires, wherein the GIS is internally provided with an outgoing line voltage transformer; the lightning arrester is simultaneously used for the lightning-protection of an outgoing line and the lightning-protection of the high resistor; after the high resistor and the lightning arrester, which are connected in sequence by one of the lead wires, are connected with the GIS in parallel by the second lead wire, the high resistor, the lightning arrester and the GIS are connected to the outgoing line by the other lead wire. According to the 330-kV high-resistance circuit disclosed by the invention, the outgoing line voltage transformer is arranged inside the GIS so as to prevent the outgoing line voltage transformer from being contacted with the air, reduce the quantity of exposed equipment in the GIS, reduce dirty flash points and improve the reliability; a special isolation switch of the high resistor is cancelled; an outgoing line lightning arrester and a high resistor lightning arrester are arranged in a combined manner so that at last one half of the equipment quantity can be saved; only a structure of three elements needs to be adopted so that an equipment body and foundation investments are saved, the land acquisition area and the occupied area are greatly reduced, and the construction cost and the operation and overhauling cost are saved; the 330-kV high-resistance circuit is very suitable for the high-altitude area.

Description

technical field [0001] The invention belongs to the field of ultra-high voltage equipment, in particular to a 330kV high-resistance circuit used in high-altitude areas. Background technique [0002] With the rapid growth of the national economy and the planning of the national grid, more 330kV ultra-high voltage power grids in my country will be constructed and operated in high-altitude areas. Compared with areas below 1000m above sea level, 330kV substations in high-altitude areas will have higher requirements for air gaps and external insulation of equipment, which will directly affect the composition and layout of power distribution devices; due to the limited terrain in high-altitude areas, it is necessary to consider Various land-saving measures; at the same time, due to its special environmental characteristics, high-altitude areas also put forward higher requirements for installation and maintenance. [0003] Among all the 330kV substations that have been completed a...

AI Technical Summary

Problems solved by technology

This scheme has more high-resistance circuit equipment, large investment, large floor area, and more pollution flash points, which is not conducive to land acquisition in high-altitude areas, and is not conducive to operation and maintenance, and the corona at the high-resistance terminal is more serious.

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