Laboratory discrimination of radiated partial discharges

Radiometric detection of partial discharge is advantageous to electric utilities since the measurement can be made from a safe distance within the vicinity of energized equipment without the need for physical or electrical connections. Recent developments in the application of radiometry have shown that radiated discharges can be detected and located in electric plants and transmission lines. This paper describes how radiated partial discharges can be detected and discriminated based on the statistical analysis of pulse characteristics using an experimental test set in the laboratory. The methodology includes antennas, as a mean of detection, and digital processing techniques for point on wave information. This investigation will serve as a basis for the early detection and identification of radiated partial discharges from high-voltage substations and transmission lines.