High-Resolution Partial Discharge Location Estimation in Power Cables

This study proposes a new approach to estimate the partial discharge (PD) location for power cables. For the PD location estimation, we estimate the time-of-arrival (TOA) interval between the direct and reflected PD pulses using time-domain reflectometry. In the proposed scheme, we introduce a high-resolution technique known as the multiple signal classification method. This method is a powerful tool that extracts the PD pulses in a noisy environment using the orthogonality of the signal vectors to noise eigenvectors. Simulation results of the theoretical and experimental PD signals show that the proposed scheme accurately estimates the TOA interval of the PD pulses in a noisy environment.