| 基于波形分析的直流系统接地故障检测新方法 |
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| 引用本文： | 季涛,谭思圆,徐丙垠,薛永端,孙同景. 基于波形分析的直流系统接地故障检测新方法[J]. 电力系统自动化, 2004, 28(22): 69-72 |
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| 作者姓名： | 季涛 谭思圆 徐丙垠 薛永端 孙同景 |
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| 作者单位： | 山东大学控制科学与工程学院,山东省,济南市,250061;山东科汇电气股份有限公司,山东省,淄博市,255031 |
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| 摘 要： | 提出了一种新的波形分析法用于直流系统接地故障检测，该法通过向直流系统注入低频方波信号，分析方波信号基波及三次谐波之间的相位及幅值关系。检测流过支路的对地电阻电流。计算接地电阻，确定接地支路和接地点。详细分析了波形分析法的工作原理，并提出检测判据，最后通过试验证实了文中方法的正确性。
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| 关 键 词： | 波形分析 直流系统 接地故障检测 检测判据 |
| 收稿时间： | 1900-01-01 |
| 修稿时间： | 1900-01-01 |
NEW METHOD BASED ON WAVEFORM ANALYSIS TO DETECT EARTH FAULT IN DC SYSTEMS |
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| Ji Tao,Tan Siyuan,Xu Bingyin,Xue Yongduan,Sun Tongjing. NEW METHOD BASED ON WAVEFORM ANALYSIS TO DETECT EARTH FAULT IN DC SYSTEMS[J]. Automation of Electric Power Systems, 2004, 28(22): 69-72 |
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| Authors: | Ji Tao Tan Siyuan Xu Bingyin Xue Yongduan Sun Tongjing |
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| Abstract: | A new method of waveform analysis for detecting earth fault in a DC system is proposed. By injecting a low frequency square wave signal to the DC system and analyzing the relationship of phase and amplitude between the fundamental and the third harmonic components, the insulation reduction of branch and locus is detected. This paper discusses the principle of waveform analysis method in details and presents the detecting criterion. Experimental tests verify the correctness and feasibility of the proposed method. |
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| Keywords: | waveform analysis DC system earth fault detection detecting criterion |
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