Lifetime Study of Transformer 150KV Gas and Steam Power Plant

Transformer BAT.12 PLTGU Priok is a power transformer which has an important role in distributing electrical power from PLTGU Priok to the load network. BAT 12 transformer which has been operating for a long time will certainly experience a decrease in standard and quality due to electrical, thermal, mechanical, chemical, and aging factors. One of the decreases in the standard and quality of the transformer is the decrease in the quality of the winding insulation. During the last two years of operation, there were several disturbances in the BAT. 12 PLTGU Priok transformer. Based on the Maximo 201819647 work order, there is a disturbance that can damage the isolation on the transformer. To determine the condition of the isolation quality and anticipate unexpected transformer breakdowns, it is necessary to test the transformer standard parameters. This test includes testing the insulation quality of the transformer windings. The Tangent Delta, Insulation Resistance and Dielectric Frekeuncy Respone test methods were carried out to determine the standard parameters of the dissipation factor, insulation resistance, polarity index, moisture content and oil conductivity. The test results are Tangent Delta of <0.5%, Oil conductivity of <6.7 pS / m, moisture content of <1.5%, HV / LV Insulation Resistance of 538 MΩ and polarity index of 2.76. The results of this test show that the transformer is still in good condition.