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电网技术  2010 

不同电压等级同塔四回输电线路不同运行方式下零序互感对接地距离保护的影响

, PP. 193-197

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Abstract:

分析了不同电压等级同塔四回线路在不同运行方式下,零序互感对接地距离保护零序电流补偿系数及测量阻抗的影响。理论分析表明所有运行方式中,线路同塔双回运行时零序电流补偿系数最大,测量阻抗最小;1回运行,其他3回检修接地时,对应的零序电流补偿系数最小,测量阻抗最大。在此基础上,给出了接地距离保护零序电流补偿系数的整定建议。利用RTDS对1?000?kV/500?kV同塔四回线路进行了仿真验证,仿真结果与理论分析一致。

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