The healthy line is unloaded for zero-sequencecomponent when a single-phase fault occurs in a non-solid earthed network.
小电流接地系统发生单相接地故障时，对零序分量而言，非故障线路相当于空载。
2
Because there is no need for acquiring the zero-sequencecomponent, 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。
3
The zerosequencecomponent and the positive sequence component equations of transmission lines are derived on the basis of telegraph equations.