输电线路故障暂态信号的模型与仿真研究  

The Research on the Model and Simulation to the Transient Signal in the Trans-Mission Line

作　　者：杨朝兵 付学文[1] 魏智娟[1] 

机构地区：[1]国网河北省电力公司邢台供电分公司,河北邢台054001

出　　处：《电气技术》2014年第5期39-43,共5页Electrical Engineering

摘　　要：分析了超高压输电线路故障时的特征,对输电线路故障时的波形特征、影响因素等进行了理论分析和仿真研究,提出了一种基于小波包能量熵的方法去甄别超高压输电线路故障相。在Matlab环境下建立了研究模型,模拟输电线路在不同工况下的工频故障特征量,选取db4小波作为小波基,用小波包分析电力系统仿真得到的大量实验数据进行处理。The paper analyzed the characteristics of the Ultra-high voltage transmission line fault on the waveform characteristics of transmission line fault, influence factors and so on. The paper carried on the theoretical analysis and simulation study. From the perspective of wavelet packet energy and the information entropy, this paper proposes a based on wavelet packet energy entropy to identify new ways of the Ultra-high voltage transmission line fault phase. The power system model is established in the Matlab environment. The paper used the simulation system to simulate transmission line under different conditions of fault voltage, and selected db3 wavelet as the wavelet base, and used wavelet packet analysis for power system simulation to get a lot of experimental data processing of fre-quency band energy entropy, and carried on the processing. Because of transmission line fault occurs, the mechanism of the breakdown voltage of the after wavelet packet transform the energy entropy is different.

关 键 词：暂态信号 故障选相 小波包变换 能量熵 

分 类 号：TM75[电气工程—电力系统及自动化]