Electric Field Simulation Analysis of Typical Defects of Main Insulation Burrs in Power Transformers

With the gradual increase of the national economy's demand for electric power, power transformers are also gradually developing in the direction of high voltage level and large capacity. According to incomplete statistics, the damage of insulation structure is one of the main factors leading to the failure of transformers. Therefore, the research on the main insulation of transformers will become a top priority. In this paper, we use COMSOL finite element simulation software to simulate the electric field of the main insulation of power transformers with burr defects. The locations where the maximum field strength appears in the transformer main insulation are analyzed to investigate the effects of different sizes and locations of burr defects on the electric field distribution of the transformer main insulation. This study is of general significance to focus on detecting the main insulation devices of power transformers, avoiding partial discharges that may be caused by burrs and ensuring safe and reliable operation of power transformers.