Partial discharge location of power cables based on an improved single-terminal method

Abstract

The precise location of partial discharge (PD) in power cables is of great significance to ensure the stable operation of the power grid. Therefore, aiming at the problem of the PD location accuracy is the affected by the uncertainty of the wave velocity, an improved single-terminal method is used to estimate the PD location of power cables. In the proposed method, the wave velocity and arrival time difference of the PD signal are modified, so that it has a higher location accuracy and better robustness. Meanwhile, in order to improve the location accuracy of the PD location method in a noisy environment, the denoising algorithm of parameterless adaptive threshold empirical wavelet transform (PATEWT) is proposed in the paper. Compared with the traditional single-terminal method and two-terminal method, the proposed algorithm has a good denoising performance. Finally, simulations are provided to verify the effectiveness and feasibility of the proposed method.