Partial Discharge Modelling and Measurement of HV Insulation

Abstract

Insulation of high voltage power equipment is very much important for their safe and reliable operation. The insulating material is of solid, liquid or gaseous forms. Most of the insulating material cannot be designed without having impurities inside it. Presence of defect or impurities in the insulation creates weak spot in the insulation and leads to local field enhancement surrounding the insulation and very cause of partial discharge. It is observed that PD is one of most pronounced cause of failure of insulation in HV power transformer and HV cable. So, insulation condition assessment is very much necessary for safe and reliable operation of power system network. In this work a MATLAB based SIMULINK model is developed for cable insulation considering all its design parameter and to generate PD pulses a void is considered in insulation of cable. In addition to that PD in transformer oil insulation is detected using electrical method and ultra-high frequency detection method by using antenna.