Partial discharge signal transmission of distributed power engineering equipment

Abstract

Generally, power engineering equipment is not designed to nicely transmit high frequency signals as used for partial discharge measurement and monitoring. For distributed equipment, such as transformers or rotating machines, the related effects, such as dispersion, attenuation, reflection, etc. already hamper partial discharge measurements in the frequency range of the IEC60270. Onsite measurements and monitoring often require using higher frequencies, where these effects have an even higher impact. This paper describes the different effects and their impact on measurement techniques.