Differentiated Design of Corona Noise Abatement in 500 kV Substation

Based on the analysis of the corona noise, the UV image from bus-bar in some typical designed substation, and the calculations of the 3-dimensional finite element models of spacer, the conclusion is drawn that the two-bundle conductor spacers are the main sources in the switchyard. Differentiation design is applied to optimize the end fitting structure the results show that the surface electric gradient of the optimized spacers can be the same level as that of the bus-bar, which reduces the corona noise in the yard.