| 引用本文: | 任先文,邹刚,史永广,吴杰珊,李卓.基于ARM的嵌入式系统在直流系统接地故障定位中的研究[J].电力系统保护与控制,2008,36(2):10-12,20.[点击复制] |
| REN Xian-wen,ZOU Gang,SHI Yong-guang,WU Jie-shan,LI zhuo.Research of embedded system based on ARM in DC system grounding fault detection[J].Power System Protection and Control,2008,36(2):10-12,20[点击复制] |
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| 摘要: |
| 介绍了基于ARM9和mC/OS-Ⅱ的嵌入式系统在直流系统接地故障定位中的应用。针对直流系统接地故障检测定位的低频信号注入法容易受到各支路对地电容和环网影响，采用了小波分析方法来实现对故障信号特征的提取。基于小波去噪原理，通过选取适当的小波函数，对支路电流信号进行分析和处理。通过仿真分析，表明该方法可以克服对地电容对接地故障检测定位的不利影响，实现故障支路的准确定位。目前的直流系统接地故障检测定位装置大都是基于单片机设计的，限制了先进算法的使用。引入ARM嵌入式系统，弥补了定位检测系统无法实现先进算法的缺陷。 |
| 关键词: 嵌入式系统 ARM 直流系统 小波分析 |
| DOI：10.7667/j.issn.1674-3415.2008.02.003 |
| 投稿时间：2007-07-20修订日期：2007-09-07 |
| 基金项目: |
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| Research of embedded system based on ARM in DC system grounding fault detection |
| REN Xian-wen,ZOU Gang,SHI Yong-guang,WU Jie-shan,LI zhuo |
| (School of Electrical Engineering, Northeast Dianli University, Jilin 132012, China) |
| Abstract: |
| In this paper, the application of embedded system based on ARM9 and mC/OS-Ⅱ in DC system grounding fault detection is introduced. For the influence of the big grounding capacitance and ring net in DC system grounding fault detection with the method of low frequency injection, wavelet analysis is used to extract the characteristic of signal. The current signal of branch is analyzed and processed by selecting the suitable wavelet function on the basis of the principle of wavelet denoising. The simulation result shows that the method can overcome the influence of the capacitance and find the fault branch accurately. The former DC grounding fault detecting devices were mostly designed based on SCM, which limited the using of advanced algorithm. This paper introduces ARM embedded system into the field of DC system grounding fault detection, which makes it improved that the recent fault detection system can not implement advanced algorithm. |
| Key words: embedded system ARM DC system wavelet analysis |
