曹虹,周泽昕,吕鹏飞,谢仲润,李博通,徐凯

• 1:中国电力科学研究院有限公司电网安全与节能国家重点实验室
• 2:国家电网有限公司
• 3:天津大学智能电网教育部重点实验室

摘要(Abstract)：

本文对高压直流输电线路故障初始阶段的暂态特性及故障机理展开研究。首先建立了适用于直流故障初始阶段暂态分析的LCC换流器、直流滤波设备及直流线路的等值模型。在此基础上，提出了直流线路故障电气量中首行波暂态量的时域解析方法，对故障点入射波的产生、行波在线路上的传递过程以及保护安装处首行波的传播过程进行了解析。在分析故障初始阶段电气量的稳态分量和暂态分量组成基础上，通过算例仿真验证了所提故障解析方法的有效性，分析了不同影响因素下所提解析方法的精度和时效性。根据所提解析方法，对故障初始阶段的暂态电流时域特性进行了系统性分析，分析了不同情况下故障暂态电流的波动、方向及突变特性。

关键词(KeyWords)： 高压直流输电;直流输电线路;故障解析;故障首行波;影响因素分析

Abstract:

Keywords:

基金项目(Foundation): 电网安全与节能国家重点实验室（中国电力科学研究院有限公司）开放基金资助项目（JBB51202001867）

作者(Author): 曹虹,周泽昕,吕鹏飞,谢仲润,李博通,徐凯

DOI: 10.19635/j.cnki.csu-epsa.000898

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