基于参数优化变分模态分解的电缆故障点中点行波测距

Traveling Wave Location at Cable Fault Point Based on Parameter Optimized Variational Mode Decomposition

针对传统的电缆行波测距方法中由计算得到的行波速度与实际速度间存在误差及行波波头标定不准确的问题,提出了一种新的相模变换来获取行波模值分量,并采用了中点行波测量法,使用乌燕鸥优化算法优化的变分模态分解对行波特征进行分解,用Teager-Kaiser能量算子来进行波头标定。在MATLAB/Simulink仿真模型中进行测试,所提方法与小波变换及经验模态分解相比,在一定的噪声范围内均具有优异的准确度。

Aiming at the problems of the error between the calculated velocity and the actual velocity and the inaccurate calibration of the traveling wave head in the traditional cable traveling wave location method,this paper proposes a new phase-mode transformation to obtain the traveling wave modulus component,and adopts the midpoint traveling wave measurement method.The sooty tern optimization algorithm(STOA)optimized variational mode decomposition(VMD)is applied to decompose the wave characteristics,and the Teager-Kaiser energy operator(TKEO)is used to calibrate the wave head.The test in MATLAB/Simulink simulation model shows that,compared with wavelet transform and empirical mode decomposition,the proposed method has excellent accuracy in a certain noise range.