| 基于数字滤波器的直流系统接地故障检测法 |
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| 引用本文： | 胡君,尹华杰.基于数字滤波器的直流系统接地故障检测法[J].电力系统保护与控制,2006,34(17):13-17. |
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| 作者姓名： | 胡君 尹华杰 |
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| 作者单位： | 华南理工大学电力学院 广东广州510640 |
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| 摘 要： | 在分析低频信号注入法缺陷的基础上,采用数字滤波器处理的检测方案。即在支路电流信号中存在着大幅值低频干扰的情况下,通过加入低通数字滤波的方法提高信噪比,滤除绝大部分低频干扰,达到精确检测的目的。利用数字滤波器的方法可以很好地排除各种低频干扰,减少检测误报。详细讲述了基于数字滤波器的接地故障检测的基本原理和设计过程,并给出了实验计算结果。
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| 关 键 词： | 直流系统 接地故障检测 数字滤波器 |
| 文章编号： | 1003-4897(2006)17-0013-05 |
| 收稿时间： | 2006-04-01 |
| 修稿时间： | 2006-06-05 |
Fault grounding detecting of DC system based on digital filter |
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| HU Jun,YIN Hua-jie.Fault grounding detecting of DC system based on digital filter[J].Power System Protection and Control,2006,34(17):13-17. |
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| Authors: | HU Jun YIN Hua-jie |
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| Affiliation: | Electric Power College, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | By analyzing the elementary principle of detecting earth fault by injecting a low frequency sine wave signal to the DC system,the paper presents a new method based on digital filter.The method can sieve a lot of interfere,extract the sine current signal that has same frequency with the injected signal from each branch current.It can enhance the signal-to-noise of circuit and eliminate most of the harmonic voltages of low frequency.The paper depicts the whole thought of the detection process and the main result tested by experiment. |
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| Keywords: | DC system fault grounding detection digital filter |
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