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电网技术  2011 

±800kV特高压直流换流站绝缘配合方案分析

, PP. 18-24

Keywords: ±800?kV特高压直流输电,绝缘配合,平抗分置,避雷器布置

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Abstract:

换流站绝缘配合是±800kV特高压直流输电工程实施中的关键技术之一。基于向家坝—上海和云南—广东2项±800kV特高压直流输电工程,从平波电抗器分置和换流站避雷器配置2个角度分析了特高压直流换流站绝缘配合的特点。重点分析了平抗分置方式在特高压输电中的经济技术优势,指出平抗分置将是特高压换流站平波电抗器的首选布置方式。给出了2个换流站的避雷器布置方案,描述了各个避雷器的保护功能,最后分析了特高压工程采用并联避雷器对直流极线平波电抗器的端对端保护功能,以及2个工程对最高端Y/Y换流变阀侧所采用的不同保护方式的优缺点。

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