李冬辉,史临潼

• 1:天津大学电气与自动化工程学院
• 2:天津大学电气与自动化工程学院 天津市南开区300072
• 3:天津市南开区300072

摘要(Abstract)：

分析了低频信号注入法的原理及存在的缺陷,针对其缺陷提出了基于小波变换的直流系统接地故障检测方案。发生接地故障后,向直流系统正负母线注入低频正弦电压信号,利用各支路的电流互感器检测出支路中的低频电流信号,通过小波变换从中提取出与注入信号同频的正弦电流信号,计算某支路电流信号中的阻性分量即可求得该支路的接地电阻值,从而判断出故障支路。大量的数值仿真和实验研究验证了该方法的可行性。

关键词(KeyWords)： 直流系统;接地故障;复值小波变换;B样条小波;低频信号注入法;发电厂;变电站

Abstract:

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基金项目(Foundation): 天津市自然科学基金资助项目(033601511)~~

作者(Author): 李冬辉,史临潼

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DOI:

参考文献(References)：

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