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SF6断路器开断并联电抗器的截流过电压及其特性分析

, PP. 170-176

Keywords: 并联电抗器开断,中性点电抗,电弧模型,拍频振荡

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Abstract:

断路器开断并联电抗器时会引起截流,产生严重的过电压。针对带中性点小电抗的并联电抗器,通过建立等效电路从理论上分析了其开断过程的过电压特点,阐明了拍频振荡产生的机理,给出了近距离开断和带长线开断并联电抗器时拍频振荡频率随电抗器参数变化的的三维图像。基于我国某一条750kV输电线路的具体参数,通过引入较准确的开关电弧模型,分析了带长线和近距离开断并联电抗器两种工况下操作过电压的具体特征。研究结果为超、特高压输电线路的建设与运行提供了有价值的参考依据。

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