The Correlation Between Partial Discharge and Dissolved and Free Gas Analysis in the Dielectric Liquid

Abstract

Nowadays one of the most useful and widely used conditions assessment techniques involves sampling and analysis of gasses dissolved(DGA) in the oil immersed transformers This technique is sensitive to a wide range of malfunctions both thermal and electrical Another detected method partial discharge (PD) is one of the most potential test item in the field detection The engineer can determine the type of failure through phase resolved partial discharge (PRPD) pattern and observe the trend of partial discharge DGA is very popular but the technique is expensive and takes time In contrast PD technique is faster more convenience in the test process and results can be distinguished electrical failures more clearly The main issue in the thesis is tried to find the correlation between PD and DGA in the dielectric liquid through comparison with the results of the PRPD and Duval triangle From the experimental results the energy variation is correlated to the results of DGA and PD

Date of Award	2019
Original language	English
Supervisor	Jiann-Fuh Chen (Supervisor)