一种基于新的相模变换矩阵的输电线路故障测距改进算法

An Improved Algorithm for Transmission Line Fault Location Based on New Phase-Mode Transformation Matrix

针对已有电力系统行波故障测距算法中采用的相模变换、小波变换存在的不足,提出了一种结合新的相模变换矩阵和提升小波的行波故障测距改进算法,实现了单一模量反映所有故障类型,简化了高频小波系数的计算,提高了计算速度。通过Matlab仿真实验,验证了与普通小波测距相比,算法具有较高的测距精度。

Considering the deficiencies of the used phase - mode transformation and wavelet transform in the available transmission line fault location algorithms, an improved algorithm for the fault location based on a new phase - mode transformation matrix and lifting wavelet is proposed. All types of fault can be reflected by a single modulus, the calculation for the wavelet coefficients with high frequency is simplified, and the calculation speed is enhanced. Matlab simulation shows that the algorithm has a higher accuracy compared with the traditional wavelet location methods.