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电网技术  2007 

500kV交流输变电工程启动调试中断路器分合分试验的探讨

, PP. 7-10

Keywords: 500,kV交流输电线路,启动调试,分合分试验,断路器,输配电工程

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Abstract:

在500kV交流输变电工程建设后期的启动调试中,需要对500kV空载线路进行至少3次单分单合的冲击合闸试验。然而,有些地区在成功进行了上述试验后,还要在500kV空载线路上进行若干次的断路器分合分试验。如果线路两端未装设合闸电阻和高压并联电抗器,在500kV空载线路上进行断路器分合分试验具有一定的风险性。作者根据重合闸过电压的基本理论和一些现场实际经验证明了在特定条件下,分合分试验过电压在2~3pu之间(1pu=550kV),证实了风险的存在,最后提出了规避分合分试验风险的建议。

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