Analysis on causes and prevention measures of Corona noise in substation

摘要

Corona noise has become an important part of noise in substations, especially in areas with severe operating conditions such as high winds, sand and dust. UV imaging detection technology can effectively find corona discharges on the surface of substation fittings. In this paper, by analyzing the test results of corona noise and ultraviolet imaging of typical fittings of 500kV substations, the main corona noise generating areas in the substation 500kV area are found. Based on the commonly used fitting structures, improvement measures are given for areas prone to corona noise. The results can provide a basis for corona noise control in 500kV substation.