极性反转下特高压换流变阀侧套管电场分析

特高压换流变阀侧套管承受混合电压,电场分布十分复杂。采用ANSYS软件仿真分析了特高压换流变阀侧套管在极性反转下的电场分布情况。计算得到了主要介质达到直流稳态的时间常数和最大场强值以及沿伞群的电场分布。计算结果表明:直流稳态后反转的电场要高于极性反转试验中的电场。在介质的分界处,伞群电场有最大值。分析结果为换流变压器阀侧套管的极性反转试验以及设计制作提供了科学的依据。

Electric Field Distribution of Bushing on the HVDC Converter Transformer's Valve Side During Polarity Reversal Test

The bushing on the HVDC converter transformer’s valve side subject to a mixed voltage,electric field distribution is very complex.the electric field distribution of the bushing on the HVDC converter transformer’s valve side is analysis by using ANSYS.The time constant to the steady-state and the maximum electric field and the electric field distribution along sheds of bushing are obtained by calculation.Calculation results show that the reversed electric field after DC steady state is higher than that in the polarity reversal test.The electric field along sheds of bushing has a maximum value in boundary of different dielectric.The research results provide scientific basis for the designing and Polarity reversal testing of the bushing on the HVDC converter transformer’s valve side.