In this paper, we are studying about partial discharge of insulator with various parameters simulated in MATLAB. There are many types of insulator available in markets which have some impurities. The partial discharges are occurred due to presence of air impurity or void in the insulating material. The insulation failure occurs in high voltage power equipment’s due to Partial discharges, which readily generates at void or rough conductor profiles of equipment’s.

The insulation should be high quality for power transmission and high voltage application, in this way we are studying about the various type of insulation material such as epoxy resin, vulcanized fibres and polyethylene which are having different capacitance value, the power transmission equipment’s has less efficiency due to degradation of insulation material. In this paper, we are studying the partial discharge for the different type of insulation materials.

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