直流馈入下的工频变化量方向纵联保护动作特性分析（一）直流系统等值工频变化量阻抗模型

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

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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（一）直流系统等值工频变化量阻抗模型

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（一）直流系统等值工频变化量阻抗模型
- Automation of Electric Power Systems Vol. 33, Issue 9, Pages: 41-46(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：
  CLC：
- 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(9): 41-46.
DOI：

LI Haifeng, ZHANG Pu, WANG Gang, et al. [J]. Automation of electric power systems, 2009, 33(9): 41-46. DOI：

摘要

直流馈入将造成交流电网工频变化量方向保护动作特性发生变化。结合交直流互联电网相互作用机理，针对工频变化量方向保护原理的分析特点，建立了适用于工频变化量方向保护动作特性分析的直流系统等值工频变化量阻抗模型，并在不同短路容量及故障条件下，对其特性进行了理论分析。基于PSCAD/EMTDC对各种直流换相失败进行仿真，验证了所建模型的有效性和准确性。该模型为进一步分析直流馈入下的工频变化量方向保护动作特性提供了依据。

Abstract

The HVDC transmission affects the operation of directional protection based on power-frequency component variationfor ac transmission lines. Modeling of HVDC system suitable for analysis of the performance of directional protection based onpower-frequency component variation is developed. Considering the interaction of HVDC and AC systems， the equivalent DC- system impedance of power-frequency component variation for commutation failures in HVDC system is formulated. Themethod is used to analyze the DC-system impedance characteristics under the conditions of different commutation failures causedby different faults. Simulations based on CIGRE benchmark HVDC system testify the effectiveness of the proposed method.

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