| 基于仙农模糊熵的融合故障选线方法 |
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| 引用本文： | 张钧,何正友,陈鉴. 基于仙农模糊熵的融合故障选线方法[J]. 电网技术, 2011, 35(9): 216-222 |
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| 作者姓名： | 张钧 何正友 陈鉴 |
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| 作者单位： | 西南交通大学电气工程学院,四川省成都市,610031 |
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| 基金项目： | 国家自然科学基金项目(50877068)~~ |
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| 摘 要： | 利用S变换对零序电流和零序电压进行分解,提取S变换结果中的幅值和相角作为故障特征量.研究了仙农模糊熵的涵义,通过模糊熵和不确定性的关系,定义了信心度来刻画一个事件是否发生的确定性.介绍了2种基于S变换的故障选线方法(比相法和能量函数法)的基本原理,基于定义的信心度对2种选线方法得到的选线结果进行了融合,从而选定故障线路...
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| 关 键 词： | 小电流接地系统 故障选线 仙农模糊熵 选线信心度 |
A Shannon Fuzzy Entropy Based Approach to Merge Fault Line Selection Results |
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| ZHANG Jun , HE Zhengyou , Chen Jian. A Shannon Fuzzy Entropy Based Approach to Merge Fault Line Selection Results[J]. Power System Technology, 2011, 35(9): 216-222 |
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| Authors: | ZHANG Jun HE Zhengyou Chen Jian |
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| Affiliation: | ZHANG Jun,HE Zhengyou,Chen Jian(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan Province,China) |
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| Abstract: | Applying S-transform to the decomposition of zero-sequence current and voltage,the amplitudes and phases in the results of S-transform are chosen as fault characteristic quantities.The meaning of Shannon fuzzy entropy is researched and by means of the relation between fuzzy entropy and uncertainty the confidence degree is defined to depict the certainty whether the event occurs or not.The principles of two fault line selection methods based on S-transform,i.e.,the phase comparison method and the energy func... |
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| Keywords: | small current neutral grounding system fault line selection Shannon fuzzy entropy confidence degree of fault line identification |
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