Analysis of Partial Discharge Measurements on Medium Voltage Covered Conductor for Overhead Transmission Lines

Abstract

This paper presents the partial discharge measurements and analysis for MVCC (Medium Voltage Covered Conductor). An 11kV, 70sqmm XLPE insulated covered conductor is used for experimental analysis. The PD (Partial Discharge) measurements have been carried out under various conditions of insulation of MVCC. The structural stress condition due to the environment is analyzed through PD measurements. The experimental results are presented under various voltage levels to evaluate the effect of voltage stress. The results presented verify the significance of PD measurement as a condition monitoring tool for fault protection of MVCC. The test results show that the typical issue in insulation is generating contemplating local discharge phenomenon which has lower initial discharge voltage and the stable discharge quantity is on the higher side.