单端电缆供电线路故障类型判断及保护选择性的研究  

Study on judgment and protection selectivity of single-ended cable power line faults

作　　者：王拓 

机构地区：[1]铜仁供电局,贵州铜仁554300

出　　处：《电力大数据》2017年第12期21-23,共3页Power Systems and Big Data

摘　　要：利用小波的性质及暂态电流行波与小波变换模极大值的关系判断故障类型,再利用微机逻辑判断实现保护的选择性。仿真证明了故障类型判断的正确性以及保护有选择动作的可靠性。The fault types are determined by the properties of wavelet and the relationship between the transient current traveling wave and the modulus maxima of wavelet transform, and then the protection selectivity is realized by microcomputer logic judgment. Simulation proves the correctness of the fault type judgment and the reliability of the selective protection action.

关 键 词：行波 小波变换 故障选相 选择性 微机保护 

分 类 号：TM92[电气工程—电力电子与电力传动]