| 引用本文: | 伍正友,钱清泉.多分辨信息熵的计算及在故障检测中的应用[J].电力自动化设备,2001,(5):9-11,28 |
| .The Computation of Multi-Resolution Entropy and Its Application in EHV Transmission Line Fault Detection[J].Electric Power Automation Equipment,2001,(5):9-11,28 |
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| 摘要: |
| 介绍了连续小波变换定义、多分辨分析及Mallat快速小波分解算法。基于信号的多分辨分析，定义了一种多分辨信息熵指数作为信号小波分析的一种后处理方法。对动态系统的仿真分析表明，该指数对系统系数微小的变换具有独特的敏感性，对EMTDC仿真分析一实际EHV输电线路故障暂态信号的研究结果表明，多分辨信息熵指数对电力设备、电网故障具有较强的检测能力，同时具有抗干扰能力强、实时性好的特点。 |
| 关键词: 多分辨分析 Mallat算法 信息熵 故障检测 小波分析 电力系统 |
| DOI： |
| 分类号:TM711 |
| 基金项目: |
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| The Computation of Multi-Resolution Entropy and Its Application in EHV Transmission Line Fault Detection |
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HE Zheng you QIAN Qing quan
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| Abstract: |
| The continuous wavelet transform definition, multi resolution analysis and Mallat fast decomposition algorithm are introduced. Based on the multi resolution analysis of signals,the multi resolution entropy, a wavelet transform post processing method, is defined. The dynamic system simulation indicates that this index has unique sensitivity to parameter changes. Applied to a real EVH transmission line system, by virtue of EMTDC simulation analysis, the multi resolution entropy can easily detect the faults of power system device and transmission line. It is a real time method, and is insensitive to fault conditions. |
| Key words: multi resolution analysis,Mallat algorithm,entropy,fault detection,real time |
