500kV电力变压器绕组波过程计算与分析

Wave process computation in a 500kV transformer

在纵绝缘的计算中,关键是波过程的计算.对1台500 kV超高压电力变压器的绕组进行了波过程计算,分别计算了高、低压绕组在全波和截波作用下的电位分布和梯度分布,确定了梯度最大的油道,并计算了相应油道在全波和截波下的绝缘裕度,为变压器的绝缘设计提供了理论依据.

The key of insulation computation is the wave process calculation. In this paper, the wave process in a 500kV ultrahigh voltage power transformer winding is calculated and analyzed, the potential distribution and the gradient distribution in high and low voltage winding under the full wave and the truncation wave action are described. The oil road with maximum voltage gradient is found, and the corresponding oil road insulation margin under the full wave and the truncation wave action are calculated. This provides the theoretical basis to the design of the transformer insulation.