电力系统保护与控制Issue(18)：9-13,5.
基于差分双正交小波熵的变压器励磁涌流识别算法
Identification of transformer inrush current based on difference biorthogonal wavelet entropy
摘要
Abstract
Inrush current is still one of the most important issues which restricts the accuracy movements of differential protection. The characteristics of the differential current under the conditions of inrush and internal fault are analyzed. According to the feature of the inrush mutations, a new judgment to identify the inrush current based on wavelet entropy is proposed. In order to solve the problem that the downhill mutations are difficult to identify, biorthogonal multi-resolution analysis is used instead of the conventional orthogonal multi-resolution analysis. The difference pretreatment is used to amplify the characteristics of the singularity of mutations, and the inrush current is identified by the use of the distribution of the three-phase wavelet entropy. Based on the above analysis, the specific implementation scheme is made. Simulation and experiments show that the proposed method is effective.关键词
励磁涌流/差动保护/差分预处理/双正交多分辨率分析/小波熵Key words
inrush current/differential protection/difference pretreatment/biorthogonal multi-resolution/wavelet entropy分类
信息技术与安全科学引用本文复制引用
张炳达,黄杰..基于差分双正交小波熵的变压器励磁涌流识别算法[J].电力系统保护与控制,2014,(18):9-13,5.基金项目
国家自然科学基金资助项目(51277128) （51277128）
