一种序分量高压线路保护选相元件

A Sequence Fault Phase Selector for Transmission Line Protective Relay

本文通过对各种不对称故障的序分量相对相位关系的分析，得出了一种新型的序分量电流相对相位与不对称故障类型的对应关系，提出了新型的故障相区划分方法，用于高压线路保护的选相元件，能够准确确认各种故障类型及故障相别。通过大量动模试验表明。

In this paper the relative phase-angle relationship of negative and zero sequence current to every kinds of unbalance faults are analyzesed,and a new six field relative phase-angle fig.of sequence current and fault types is proposed.An efficient method for determinating the fault phases is made.It can be used for fault phase selector of EHV/UHV transmission line protection .Power system dynamic simulation tests proven this fault phase selector is successful to EHV/UHV transmission line protective relay.