Accurate Detection Method for Voltage Traveling Wave Based on L1-Regularization and Least Squares Optimization

Aiming at the problem that the secondary traveling wave obtained by the voltage traveling wave sensor cannot truly reflect the waveform and fault information of the primary traveling wave, this paper proposes an accurate detection method for voltage traveling wave based on L
1
-regularization and least squares optimization. Firstly, the forward transfer function model of the special voltage traveling wave sensor is constructed, and then the inversion model is derived. Then, discrete deconvolution method and L
1
-regularization and least squares inversion algorithm are used to obtain the primary traveling wave signal. Simulation and experimental results show that the proposed method can effectively solve the ill-posed problem in waveform inversion. The similarity between the inversion and simulation of the primary traveling wave is high, and the accurate detection of fault transient traveling wave information can be realized.