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| 摘要: |
| 介绍基于多分辨分析的Mallat快速小波分解算法。讨论了EHV输电线路故障电弧及产生的暂态电流的特点和单端量电流暂态保护基本原理，利用小波分析的去噪和时频局部化特性，建立了基于多分辨分析的单端量电流暂态保护启动判居和跳闸判据。借助EMTDC仿真分析软件，研究一实际电网EHV输电线路故障电弧特点，探讨了单端量电流暂态保护机理的可行性。 |
| 关键词: 输电线路 电流暂态保护 EHV 继电保护 多分辨分析 |
| DOI： |
| 分类号:TM726 TM773 |
| 基金项目: |
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| A Study of Non-Unit Current Transient Protection for EHV Transmission Line |
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HE Zheng you QIAN Qing quan
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| Abstract: |
| Mallat fast decomposition algorithm based on multi resolution analysis is introduced. The character of EHV transmission line fault arc and its transient current is discussed, and the principle of non unit current transient protection is studied. Based on the time frequency localization and de noise character of wavelet transform, a new non unit current transient protection criterion based on multi resolution analysis is established. By the simulative analysis software of EMTDC, the fault arc character of a real EHV transmission line is studied and the feasibility of non unit current transient protection discussed. |
| Key words: multi resolution analysis,mallat algorithm,transient protection,protection criterion |
