L-shaped distribution structure of valve hall converter transformer of extra-high-voltage direct-current converter station

Abstract

The invention relates to an L-shaped distribution structure of a valve hall converter transformer of an extra-high-voltage direct-current converter station. The L-shaped distribution structure comprises two master control buildings, two low-end valve halls, two high-end valve halls, and a plurality of converter transformers. The main control buildings, the low-end valve halls, the high-end valve halls, and the converter transformers are distributed in a left-right mirror image mode. The low-end valve halls and the high-end valve halls are arranged at the rears of the main control buildings in an L-shaped mode; the low-end valve halls are distributed right behind the main control buildings longitudinally; and the high-end valve halls are distributed at the outer sides of the low-end valve halls. One parts of the converter transformers are distributed at the inner sides of the low-end valve halls horizontally in a linear mode; and the other parts of the converter transformers are distributed at the front sides of the high-end valve halls longitudinally in a linear mode. Access leads of the converter transformers are directly inserted into wiring terminals of the low-end valve halls and the high-end valve halls by direct-current wall-through casing tubes; and current convergence of the outputs of the converter transformers is realized by wide-span leads. Therefore, a dual-L-shaped distribution structure distributed at the two sides of the wide-span leads symmetrically is formed. The arrangement is flexible and compact; the occupied area is small; and the initial investment cost can be reduced well.

Description

technical field [0001] The invention relates to an L-shaped distribution structure of a valve hall converter transformer of an UHV DC converter station, which can be applied to double valves and single-phase double-winding converter transformer equipment in power plants, and is especially suitable for ±800kV UHV DC converter stations Arrangement structure of valve hall converter transformer. It belongs to the field of electric construction. Background technique [0002] With the development of my country's economy and the implementation of long-distance large-capacity power transmission projects such as west-to-east power transmission, there are more and more ±800kV UHV DC power transmission projects. The converter stations at the sending and receiving ends adopt the connection mode of two sets of 12-pulse converter valves connected in series for each pole, that is, four valve halls need to be set up for both poles of each converter station. The UHV converter station occup...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a UHV DC converter station valve to solve the problems of large occupied area of ​​existing face-to-face converter stations, difficulty in steering and long time when replacing spare high-end and low-end converter transformers, etc. Hall converter transformer L-shaped distribution structure

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