Development of user panel for polarization and depolarization current (PDC) measurement analysis of high voltage (HV) machine insulation system

Abstract

Insulation system is the backbone in any HV machine and as well as power system. However, degradation that always happens in the insulation system will reduce the lifespan of the machine. Thus, condition monitoring of the insulation system is highly recommended in order to maintain the reliability and efficiency of the machine during operation. Polarization and Depolarization Current (PDC) measurement is one of the time domain condition monitoring that been acknowledge by the researchers around the globe. This predictive maintenance with the aid of online monitoring provides an indication of the machine's condition. The development of measurement technologies and data analysis techniques using computational methods give an advantage in saving time and improve safety. This paper presents the user panel that had been developed for the application of PDC diagnostic methods. Through this panel the conductivity level based on PDC measurement on the machine insulation system can be analyze and monitored. The developed user-friendly panel enable user to run the recorded PDC data to evaluate the performance of the insulator in term of its conductivity. It was found that the conductivity level of the insulation material is related to its PDC curves. The system developed was found successfully helping user to do analysis on PDC data by giving the PDC pattern and conductivity of the tested insulator.