基于小波变换的中压船舶电力系统接地故障选线方法研究  

Study on Faulty Line Selection in Shipboard Medium Voltage Power System Based on Wavelet Transformation

作　　者：陈双[1] 施伟锋[1] 胡红钱[1] 王桂艳[1] 

机构地区：[1]上海海事大学,上海201306

出　　处：《船电技术》2015年第8期43-47,共5页Marine Electric & Electronic Engineering

摘　　要：本文对中性点经高电阻接地的船舶电网单相接地故障过程做了理论分析。运用小波变换提取了船舶电网故障后的零序电流暂态分量。基于提取的零序电流暂态分量和小波变换模极大值奇异性检测理论,建立了船舶电网单相接地故障选线判据,为船舶电网继电保护研究提供参考。最后在MATLAB软件上进行了船舶电网单相接地故障和选线仿真,验证了选线判据的可行性和正确性。This article analyzes single-phase grounded fault process of ship＇s power system neutral point by high resistance grounded. Zero sequence current transient component of ship grid fault is picked-up by use of the wavelet transformation. Based on the zero-sequence transient current and the wavelet transformation modulus maxima singularity detection theory, the fault line selection criterion is established for ship ＇s power system single-phase grounded. Finally, the simulation of ship power system single-phase ground fault and fault line selection in MATLAB software is made, which proves the feasibility and correctness of the criterion.

关 键 词：船舶电力系统 中性点高电阻接地 小波变换 单相接地故障选线 

分 类 号：TM75[电气工程—电力系统及自动化]