This paper analyses the existing zero sequence directive current selective leakage protection principle which is to surmount the effect of distributed capacitance on it.

对近期提出的克服电网分布电容影响小电流接地选线的零序直流选择性保护原理作了理论分析。

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Because there is no need for acquiring the zero-sequence component, this principle can eliminate the effect of zero-sequence mutual inductance between coupling lines.

由于该方法中没有用到线路两真个零序分量，消除掉耦合线路之间零序互感对测距的影响。

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