The Effect of Harmonics on Purification Scheduling of Transformer Oil to Restrain The Degradation Rate

In ideal conditions the electric power system has a sinusoidal current and voltage waveform. In fact, voltage and current distortion occur from non-linear load. Trends in the use of electronic component-based equipment for energy efficiency contribute to the loss of the transformer. Non linear load which is fed by the transformer will continuously increase the temperature to be an indication of reducing the quality of the transformer insulation oil. This results in a loss in the performance of the transformer. Non-linear loads can generate harmonic currents caused by rectifier inputs that tend to draw currents in the form of non-sinusoidal and non-continuous. The paper will discuss the effect of harmonics on the deterioration in the quality of transformer insulation materials. Insulating oil is an important part of the transformer given its function as a cooler and insulation, so the quality of the insulation material must be maintained so that the breakdown voltage is always at the permitted limit. Calculation of transformer loss due to harmonics which causes isolation failure will be carried out. The calculation results will be discussed later efforts to reduce transformer losses due to harmonics are expected to be the solution used to reduce the failure rate of transformer isolation.