Multi-PD sources location by UWB RF detection on power transformers and a case study on-site

Ultra-wideband (UWB) RF sensor-array PD location is a novel technology based on antenna array detection and time-difference algorithm for power transformers. It has demonstrated high sensitivity and accuracy for single PD source by experiments in laboratory. In this paper, a further study has been carried out for multi-PD sources location using the UWB RF sensor array PD location method. Moreover, a practical location case is given on a real transformer. The results indicate that the method presented in the paper is effective for multi-PD source location and has promising future in real transformers.