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首页> 外文会议>2014 International Conference on Power System Technology: Towards Green, Efficient and Smart Power System >A phase selection element for zero sequence current differential protection
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A phase selection element for zero sequence current differential protection

机译：零序电流差动保护的相选择元件

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摘要

A phase selection method for zero sequence current differential protection was proposed in this paper. In the first, electrical quantities characteristics of different ground faults were analyzed. Then zero sequence differential current was used as reference value and sizes of sequence differential currents and zero sequence differential current were compared to identify fault phase. Phase differential current was used to identify healthy phase of two phases to ground faults, theory analysis and simulation results show that the phase selection criterion can identify fault phase correctly and is not affect by load current and fault resistance. It is more sensitive than zero sequence current differential protection.
机译：提出了一种零序电流差动保护的选相方法。首先，分析了不同接地故障的电量特征。然后将零序差动电流用作参考值，并比较零序差动电流和零序差动电流的大小以识别故障相位。通过相差电流识别出接地故障的两相健康状态，理​​论分析和仿真结果表明，相选择准则可以正确识别故障相，不受负载电流和故障电阻的影响。它比零序电流差动保护更灵敏。

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