三相牵引变压器励磁涌流模糊识别的研究

Research of Three-phase Traction Transformer Inrush Current Fuzzy Recognition

影响三相牵引变压器微机差动保护速动性的根本问题是如何有效识别励磁涌流。单一判据或保护原理双重化有时也会出现误判,或影响速动性。文章通过仿真提取励磁涌流波形并进行分析,根据其主要特征,分别建立隶属函数,并对隶属度和相关权重进行分析,最后给出了整个励磁涌流判据的逻辑框图。

Affecting three-phase transformer differential protection speeding fundamental problem is how to effectively iden- tify magnetizing inrush. The single criterion or the protection of the principle of double sometimes misjudge, or affect speeding. Through simulation extracting excitation inrush current waveform and analysis, according to its main feature, membership func- tion were established respectively, and analysis of membership and its weight, finally giving out the magnetizing inrush criterion of logical block diagram.