直流馈入下的工频变化量方向纵联保护动作特性分析（二）故障线路的方向保护

LI Haifeng; ZHANG Pu; WANG Gang; ZHU Gelan; ZHAO Manyong; ZHOU Hongyang; ZHAO Youcheng

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直流馈入下的工频变化量方向纵联保护动作特性分析（二）故障线路的方向保护

更新时间：2025-08-13

- 直流馈入下的工频变化量方向纵联保护动作特性分析（二）故障线路的方向保护
- Automation of Electric Power Systems Vol. 33, Issue 10, Pages: 47-53(2009)
- 作者机构：
  
  1. 华南理工大学电力学院,广东省,广州市,510640
  2. 中国南方电网电力调度通信中心,广东省,广州市,510623
- 作者简介：
- 基金信息：
- DOI：
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- Published：2009
- 稿件说明：
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LI Haifeng, ZHANG Pu, WANG Gang, et al. [J]. Automation of electric power systems, 2009, 33(10): 47-53.
DOI：

LI Haifeng, ZHANG Pu, WANG Gang, et al. [J]. Automation of electric power systems, 2009, 33(10): 47-53. DOI：

摘要

基于不同换相失败情况下的直流系统等值工频变化量阻抗特性，结合工频变化量方向保护原理，分析了不同输电线路故障时，直流换相失败对故障线路工频变化量方向元件产生影响的机理，并对各种情况下导致故障线路工频变化量方向纵联保护拒动的条件进行了深入分析。基于PSCAD/EMTDC的仿真验证了理论分析的正确性。

Abstract

Based on impedance characteristics of equivalent power-frequency component variation under different situation of commutation failures in HVDC system， combined with directional protection principle for power-frequency component variation， the influence mechanism of communication failure on the operation of directional relays for the different faulted transmission lines is analyzed. In addition， conditions of refusal to act of directional protection of faulted line under various situations are also deeply analyzed. The correctness of fore-mentioned analysis is confirmed with PSCAD/EMTDC simulation. The work is supported by National Mega-projects of Science Research for the 11th Five-year Plan（No. 2006BAA02A30） and National Natural Science Foundation of China（No. 50337010）.

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