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电网技术  2011 

±660宁东—山东直流输电换流阀最小交流电压运行试验关键应力的研究

, PP. 60-65

Keywords: 直流输电工程,换流阀,运行试验,最小交流电压,关键应力,合成试验方法

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Abstract:

作为直流阀运行试验的一部分,最小交流电压运行试验的目的在于考核换流阀低电压下的开通、关断等重要特性,对试验装置也提出了特殊要求。为达到试验目的,关键在于从等效的角度上对试验装置提出具体要求,前提是确定需要等效的关键应力。本文首先介绍了直流换流阀基本结构与运行特性,分析了换流阀在最小交流电压条件下开通、关断的暂态过程,指出了影响直流换流阀可靠运行的因素,在此基础上总结了最小交流电压运行试验的关键应力,为合成试验装置输出提供了依据。最后,提供了宁东—山东±660kV直流换流阀最小交流电压运行试验结果,验证了以关键应力为依据、以合成的方法进行最小交流电压运行试验经济实用、充分等效,能够满足工程要求。

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