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| 一种利用小波原理防止差动保护误动的新方法 | |
| 引用本文： | 李贵存,刘万顺,李鹏,刘建飞,滕林,杜振华. 一种利用小波原理防止差动保护误动的新方法[J]. 电力系统自动化, 2002, 26(2): 45-48 |
| 作者姓名： | 李贵存 刘万顺 李鹏 刘建飞 滕林 杜振华 |
| 作者单位： | 1. 华北电力大学四方研究所,北京市,100085 2. 东北电力学院电力系,吉林省吉林市,132012 3. 北京和利时系统工程股份有限公司,北京市,100096 |
| 摘 要： | 外部发生短路故障时，由于电流互感器饱和引起的暂态不平衡电流造成的差动保护误动作，是一个值得仔细研究的重要课题。文中提出了一种应用小波变换原理提取和分析故障发生时刻及电流互感器饱和后故障相电流波形与差流波形的暂态特性，有效地防止因电流互感器饱和造成的差动保护误动作的新方法。 |
| 关 键 词： | 小波变换 电流互感器 饱和 差动保护 误动 电力系统 继电保护 |
| 收稿时间： | 1900-01-01 |
| 修稿时间： | 1900-01-01 |
NEW METHOD FOR AVOIDING DIFFERENTIAL PROTECTION TO MAL-OPERATE BASED ON WAVELET TRANSFORM |
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| Li Guicun,L iu Wanshun,L i Peng,L iu Jianfei,Teng L in,Du Zhenhua .North China Electric Power U niversity,Beijing ,China . Northeast China Institute of Electric Power Engineering,Jilin ,China. NEW METHOD FOR AVOIDING DIFFERENTIAL PROTECTION TO MAL-OPERATE BASED ON WAVELET TRANSFORM[J]. Automation of Electric Power Systems, 2002, 26(2): 45-48 | |
| Authors: | Li Guicun L iu Wanshun L i Peng L iu Jianfei Teng L in Du Zhenhua .North China Electric Power U niversity Beijing China . Northeast China Institute of Electric Power Engineering Jilin China |
| Affiliation: | Li Guicun1,L iu Wanshun1,L i Peng2,L iu Jianfei1,Teng L in1,Du Zhenhua3 1.North China Electric Power U niversity,Beijing10 0 0 85,China 2 . Northeast China Institute of Electric Power Engineering,Jilin 132 0 12,China 3. Beijing Hollysys Co |
| Abstract: | Differential protection is easy to be influenced by the im balance current caused by current transformer saturation to mal- operate. A m ethod for analyzing the differential currentand the phase current of the transformer by wavelettransform is presented to detect accurately fault point happening and differential current appearing.The instantaneous current value after the saturation of current transform er is also analyzed to avoid the differential protection to mal- operate when the fault from external fault zone to internal fault zone. |
| Keywords: | wavelet transform s current transform er saturation differential protection |
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