同杆双回线下接地距离保护Ⅰ段动作边界计算与仿真测试

ZOU Xiaofeng

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同杆双回线下接地距离保护Ⅰ段动作边界计算与仿真测试

更新时间：2025-08-13

- 同杆双回线下接地距离保护Ⅰ段动作边界计算与仿真测试
- Automation of Electric Power Systems Vol. 39, Issue 15, Pages: 154-159(2015)
- 作者机构：
  
  国网上海市电力公司电力科学研究院,上海市,200437
- 作者简介：
- 基金信息：
- DOI：
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- Published：2015
- 稿件说明：
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ZOU Xiaofeng. [J]. Automation of electric power systems, 2015, 39(15): 154-159.
DOI：

ZOU Xiaofeng. [J]. Automation of electric power systems, 2015, 39(15): 154-159. DOI：

摘要

同杆并架双回线近年来得到了广泛的应用

但其双回线的零序互感对接地距离保护的误差影响给运行整定带来了挑战。文中通过对双回线运行、本线运行邻线检修、本线单侧运行3种工况下接地距离保护测量阻抗及距离保护Ⅰ段动作边界的计算

分析了各工况下距离保护Ⅰ段动作边界的影响因素及误差程度

并根据特高压系统参数在实时数字仿真器(RTDS)中对实际保护装置进行了仿真测试

验证了所述的计算与分析结论

从而为距离保护的定值整定提供了依据

分析表明在双回线互感影响下距离保护Ⅰ段应在传统定值下合理回缩以确保其选择性。

Abstract

Double-circuit transmission lines on the same tower are widely applied recently bringing challenges to operation and value setting due to errors in earth-fault distance protection. Through calculation of measured impedance and trip boundary of zone Ⅰ of earth-fault distance protection in the double-circuit normal operation mode

single line operation mode and single side operation mode

the factors influencing trip boundary of zone Ⅰ of distance protection magnitude of errors are analyzed in different operation modes. Based on actual ultra-high voltage alternating current system parameters

the line protection device is tested with a real-time digital simulator (RTDS) to verify the calculation and analysis above

providing a basis for value setting of distance protection. It is shown by analysis that

influenced by double-circuit mutual inductance

traditional value setting of zone Ⅰ of earth-fault distance protection should be reduced to a rational extent to ensure the selectivity of protection.

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