Development and Validation of Rogowski Coil with Commercial High Frequency Current Transformer for Partial Discharge Detection

This paper proposes a simple construction of a low-cost air-core Rogowski coil (RC) sensor to measure PD pulse current by investigating the effect of winding turn number. In this study, the characteristic of the designed RC sensor was identified using Vector Network Analyser (VNA) prior to PD measurement in the laboratory. The selection of a suitable number of turns of winding for the RC has been identified to produce an optimal design of the sensor. The experimented performance of RC was compared and validated with a commercial ferrite-core high frequency current transformer (HFCT). Moreover, linear regression statistical methods have been used to validate the performance similarity between both sensors. This comparison shows a positive linear relationship and hence, validating the constructed RC with higher turn number was more suitable for PD detection.