基于单端电气量行波测距方法改进  

Improvement of Traveling Wave Fault Location Method Based on the Amount of Single-Ended Electrical Parameters

作　　者：辛超山[1] 李凤婷[1] 贾言争[1] 

机构地区：[1]新疆大学电气工程学院,乌鲁木齐830047

出　　处：《电测与仪表》2013年第10期54-58,共5页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(50967004;51267019)

摘　　要：输电线路行波测距较传统工频测距有明显的优势,通过小波变换可精确定位第一个波头位置。但在复杂线路中,由于波形叠加、交叉透射波等因素的影响,经过小波变换后的第二个反射幅值迅速衰减并小幅震荡,严重影响测量精度。针对第二个波头的衰减,本文提出对变换后的第二个反射波进行均值化处理,达到提高测量精度的效果,并通过MATLAB仿真分析了此方法的正确性和有效性。Transmission Line Traveling Wave Ranging obviously has more advantages than the power frequency ranging for the precise positioning of the first wave head through the wavelet transform. However, in a complex circuit, the second reflection amplitude after wavelet transform rapidly decays and has a slight concussion, which seriously affects the measurement accuracy due to factors such as waveform superimposed, cross transmission wave and so on. In allusion to the second wave attenuation, this paper proposes that the second reflected wave will transform the average treatment effect so as to improve the measurement accuracy. Then the correctness and validity of this method are analyzed with MATLAB simulation.

关 键 词：故障测距 反向行波 突变性检测 均值化 

分 类 号：TM933[电气工程—电力电子与电力传动]