特高压皖电东送线路零序互感对接地距离保护的影响

ZHANG Bo

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特高压皖电东送线路零序互感对接地距离保护的影响

更新时间：2025-08-13

- 特高压皖电东送线路零序互感对接地距离保护的影响
- Automation of Electric Power Systems Vol. 37, Issue 21, Pages: 94-98(2013)
- 作者机构：
  
  浙江大学电气工程学院,浙江省,杭州市,310027
- 作者简介：
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- Published：2013
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ZHANG Bo. [J]. Automation of electric power systems, 2013, 37(21): 94-98.
DOI：

ZHANG Bo. [J]. Automation of electric power systems, 2013, 37(21): 94-98. DOI：

摘要

分析了双回线路发生接地故障时零序电流的分布特点、零序互感对接地距离保护的影响、接地距离保护中零序补偿系数（K值）的取值方法，以及不同的K值整定方案对保护动作范围的影响。对特高压1000kV皖电东送工程双回线路进行了仿真分析，给出了不同工况下沿线各点故障测量阻抗的变化轨迹，以及不同零序补偿系数下各自的距离Ⅰ段整定参考值和保护的相应动作范围。最后结合工程实际，综合考虑整定的方便性和保护的灵敏性、安全性，给出了供参考的距离保护相关定值的整定方案。

Abstract

Distribution characteristics of zero-sequence current when parallel transmission lines grounding fault happens，the impact of zero-sequence mutual inductance on phase-earth distance protection，the setting method of zero-sequence compensation coefficient（K values）in grounding distance protection，and the impact of different K value setting schemes on protecting range of action are analyzed.With the simulation analysis of ultra-high voltage（UHV）1000kV Anhui-to-east power transfer parallel transmission lines，change trajectories of fault calculating impedance under different working conditions along the line，the setting reference values and protecting action range of zone I distance with different zero-sequence compensation coefficients are given.Finally，combining with the engineering practice，and considering the setting convenience and the protection sensitivity and safety，referential setting schemes for distance protection related constant values are proposed.

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