Improved Methods for UHF Localization of Partial Discharge in Air-Insulated Substations

A time-difference-of-arrival-based partial discharge (PD) location system that utilises prior knowledge of substation layout is presented. We propose a new time delay estimator employs onset detection techniques and demonstrate, through experimental results, it at least 2.8 times more accurate than other conventional estimators. Using substation’s layout, we develop minimum mean-square-error (MMSE)-based an algorithm optimises antenna placement to maximise accuracy in regions occupied by high-voltage equipment. Simulation results show uses the proposed 5.9 high-noise environment.