Fault Phase Selector of Protective Relay for Cross Country Fault on Double Circuit Lines

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Fault Phase Selector of Protective Relay for Cross Country Fault on Double Circuit Lines

更新时间：2025-07-09

- Fault Phase Selector of Protective Relay for Cross Country Fault on Double Circuit Lines
- Vol. 45, Issue 2, Pages: 97-101(2011)
- 作者机构：
  
  新乡供电公司,河南,新乡,453002
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM771
- Online First：10 February 2011，
  
  Published：2011
- 稿件说明：
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Fault Phase Selector of Protective Relay for Cross Country Fault on Double Circuit Lines[J]. 2011, 45(2): 97-101.
DOI：

Fault Phase Selector of Protective Relay for Cross Country Fault on Double Circuit Lines[J]. 2011, 45(2): 97-101. DOI：

摘要

针对相电流差选相元件在平行双回线首端发生跨线故障时会误选相的问题

提出了基于故障分量方向元件的选相方案.将平行双回线路跨线故障作为复故障

分析了相电流差选相元件在线路首端跨线故障时误选相的原因.在故障被判为跨线故障的情况下

利用电压元件选出故障相

对每一回线

利用故障分量方向元件判断对应相故障是否在本回线路内部

当故障分量电压与故障分量电流间的相角在0°～180°时

判故障在本回线内

从而选出每回线的故障相.EMTP仿真结果表明

该方案在各种跨线故障下均能正确选相

可直接应用于现有基于单回线信息的微机保护装置.

Abstract

Aiming at the misoperation of the conventional phase selector by phase current-differential during some cross country faults

a fault phase selector for double circuit lines on the same tower using fault superimposed components direction element is developed

where the cross country fault of double circuit lines is considered as multiple faults of single circuit lines to analyze the misoperation of conventional phase selector. The new scheme selects fault phase by fault superimposed component voltage

and the fault lines of the corresponding fault phase are selected with fault superimposed component direction element. If the phase angle between faults superimposed component voltage and current of either double circuit line is in the range of 0°～180°

the fault is in the line. The EMTP simulation results show that the proposed scheme is applicable to microcomputer-based protection.

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references

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