Comparative Study Of Moisture Impact And Breakdown Voltage Of Various Transformer Insulating Oil Types

Che Roslan, Mohd Hafizul (2017) Comparative Study Of Moisture Impact And Breakdown Voltage Of Various Transformer Insulating Oil Types. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Comparative Study Of Moisture Impact And Breakdown Voltage Of Various Transformer Insulating Oil Types.pdf - Submitted Version Download (503kB)

Abstract

Power transformer life span depends heavily on its insulation systems which consist of paper and insulating oil. Recently, the insulating oil used in transformer application are mineral oil, natural ester oil and silicon oil. One of critical factors that impact the long term operation of transformer is moisture. Presence of moisture in insulation oils can alter the physicochemical property of oil and drastically affects the breakdown voltage. Although the importance of this issue, it is not being stressed by previous researchers. This study will present the effect of moisture on breakdown voltage (BDV) in various type of insulation oils. The effects of moisture content are investigated by varying the amount of distilled water added into the oil samples from 0.2ml to 1ml with an increment of 0.2ml. Breakdown voltage (BDV) test is conducted five times and the mean breakdown voltage is determined for each oil sample. In this study discussed that the insulation oil that content high moisture has lower breakdown voltage (BDV) compared with pure insulation oil. Thus, lower value of breakdown voltage (BDV) are expected by addition of 0.2ml to 1ml of distilled water into the insulation oils.

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