中阻抗母线保护母联CT接线的理论分析

The Theoretical Analysis on the Bus-coupled CT Arrangement for Moderate Impedance Busbar Protection

对国内中阻抗原理的母线差动保护所采用的一组母联CT带两组辅助CT的接线方式在母联CT饱和时，装置可能发生误动进行了理论上的分析，并提出防止母线保护误动的措施。

Now,some moderate impedance busbar protective devices adopt the arrangement of one bus-coupled CT with two auxiliary CTs in our country. An theoretical analysis on the possible maloperations occurred under this arrangement is presented and some measures are proposed to prevent faults to design.