| 基于自适应小波方法的小电流故障选线研究 |
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| 引用本文： | 罗龙,艾琳.基于自适应小波方法的小电流故障选线研究[J].广西电力,2008,31(6). |
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| 作者姓名： | 罗龙 艾琳 |
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| 作者单位： | 1. 华北电力大学电气与电子工程学院,北京 102206;杭州供电局,浙江 杭州 310018
2. 华北电力大学电气与电子工程学院,北京,102206 |
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| 摘 要： | 分析了小电流接地系统发生单相接地故障时的暂态故障特征,指出了传统小波选线方法的优点和需要改进的地方,提出了一种新型的自适应小波选线方法.该方法定义了2个衡量反映小波分解后各个尺度信息优劣的指标:绝对幅值强度和平均幅值强度,基于这2个指标,该方法能够自适应地选择分解尺度,提高选线结果的正确性.对仿真结果的分析表明了该方法的有效性和可行性.
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| 关 键 词： | 小电流接地系统 故障选线 自适应小波方法 |
Research of Fault Line Selection of Non-direct-ground System Based on Selfadaptive Wavelet Method |
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| LUO Long,AI Lin.Research of Fault Line Selection of Non-direct-ground System Based on Selfadaptive Wavelet Method[J].Guangxi Electric Power,2008,31(6). |
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| Authors: | LUO Long AI Lin |
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| Affiliation: | LUO Long1,2,AI Lin1(1.School of Electrical & Electronic Engineering,North China Electric Power University,Beijing 102206,China,2.Hangzhou Electric Power Company,Hangzhou 310018,China) |
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| Abstract: | The transient fault characters of single-line-to-ground fault in no-direct-ground system are analyzed.The merits and demerits of traditional wavelet methods for fault line selection in no-direct-ground system are summarized and a new self-adaptive wavelet method is proposed.Two indices: absolute amplitude value and average amplitude value are defined to evaluate the nature of different scales of wavelet decomposition.Based on these indices,the proposed method can self-adaptively select decomposition scale a... |
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| Keywords: | no-direct-ground system fault line selection self-adaptive wavelet method |
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