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.
出处
《电测与仪表》
北大核心
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)
关键词
故障测距
反向行波
突变性检测
均值化
fault location, reverse traveling wave, mutation detection, average
