| 油中典型局部放电模型放电波形特征参数的提取 |
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| 引用本文： | 王国利,郝艳捧,李彦明. 油中典型局部放电模型放电波形特征参数的提取[J]. 电网技术, 2001, 25(10): 34-37,46 |
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| 作者姓名： | 王国利 郝艳捧 李彦明 |
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| 作者单位： | 1. 西安交通大学电气工程学院,
2. 西安交通大学电气工程学院 |
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| 摘 要： | 根据油中局部放电脉冲波形的特性，提出了一种用于抑制噪声的多分辨率分析和软阈值相结合的小波消噪算法；同时对提取的放电波形的特征参数进行了分析和处理。结果表明，软阈值消噪能较好地解决保留信号局部特征与抑制噪声之间的矛盾，特别适合于对单个局部放电脉冲波形的处理；不同的局部模型，其放电脉冲波形的特征参数有很大差异，提取每种放电的波形特征参数，就可以较好地进行放电类型的识别。
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| 关 键 词： | 电力变压器 绝缘结构 局部放电 放电波形 特征参数 变压器油 |
| 文章编号： | 1000-3673(2001)10-0034-04 |
PULSE CURRENT PARAMETER EVALUATION OF TYPICAL PARTIAL DISCHARGE MODELS IN OIL |
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| WANG Guo-li,HAO Yan-peng,LI Yan-ming. PULSE CURRENT PARAMETER EVALUATION OF TYPICAL PARTIAL DISCHARGE MODELS IN OIL[J]. Power System Technology, 2001, 25(10): 34-37,46 |
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| Authors: | WANG Guo-li HAO Yan-peng LI Yan-ming |
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| Abstract: | According to the characteristics of partial discharge(PD)pulse waveform in tra nsformer oil and on the basis of combining multi-resolution analysis with soft -threshold, a novel wavelet de-noising algorithm for suppressing nois es is presented. The evaluated pulse parameters of discharge waveform are analyz ed and processed. The results from above analysis and processing show that the c ontradiction between partial characteristic and restraining noise can be settled well by soft threshold which is suitable for processing the waveform of single PD pulse. The partial characteristics of discharge pulse waveforms of different PD models are distinct. Evaluating the waveform characteristic parameters corres ponding to each discharge, the recognition of discharge type can be carried out well. |
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| Keywords: | pulse current of partial discharge soft-threshold wavelet de-noising parameter evaluation |
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