Title :
Analysis of variations in measured recovery voltage peaks due to presence of moisture in insulation of power transformers
Author :
Mallik, S.B. ; Purkait, P. ; Mohandas, Nimesh ; Kulkarni, S.V.
Author_Institution :
Electr. Eng. Dept., Haldia Inst. of Technol., Haldia, India
Abstract :
The main focus of this article is to investigate the relation between recovery voltage peaks and moisture content in oil-paper insulation system in power transformers. It investigates the causes of non-standard recovery voltage peaks and uses an algorithm to simulate different oil-paper moisture conditions. Two different transformers have been studied and an attempt has been made to correlate the shifting of recovery voltage peaks in the response to variations in oil and paper moisture contents. A brief discussion on the appearance of subdominant peaks has also been given to relate their presence with interfacial polarization processes.
Keywords :
moisture; power transformer insulation; statistical analysis; transformer oil; analysis of variation; interfacial polarization process; oil-paper moisture condition; power transformer insulation; voltage peaks recovery measurement; Capacitance; Moisture; Oil insulation; Power transformer insulation; Resistance; Voltage measurement; Recovery voltage; dipoles; moisture; subdominant peaks; transformer insulation;
Conference_Titel :
Condition Assessment Techniques in Electrical Systems (CATCON), 2013 IEEE 1st International Conference on
Conference_Location :
Kolkata
Print_ISBN :
978-1-4799-0081-7
DOI :
10.1109/CATCON.2013.6737494
