Oil level assessment of Distribution Transformer by development of Capacitance Model

Abstract

Distribution Transformers are one of the most important equipment in power system network. Distribution transformer failures can be broadly categorized due to electrical and/or mechanical faults. Preventive diagnosis and maintenance of transformer have become more and more popular in recent time in order to improve the reliability of electric power system. It is experienced by the power utility engineers that the distribution transformer failure occurs mainly due to overload condition and improper cooling agent (oil) level in distribution transformer. This paper presents Capacitance Model which is developed by taking actual data of the distribution transformer connected in Maharashtra State Electricity Distribution Company Limited (MSEDCL). The oil leakage problem in terms of oil level in distribution transformer can be detected by developing capacitance modeling as well as by Newton's cooling law.