摘要
本文对SFP400000/500超高压电力变压器的绝缘进行了仿真计算。对主绝缘电场的计算应用有限元法,计算时将主绝缘电场场域划分为三个子区域,得出了各区域中的电位分布和电场强度分布,并计算了相关的绝缘裕度,找出了绝缘的薄弱环节。对纵绝缘电场,建立了绕组在雷电过电压下的电路模型,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的全波和截波下的绝缘裕度,为变压器绝缘设计和改进提供了理论上的参考依据。
In this paper,the insulation electric field in a SFP400000/500 extra-high voltag power transformer is calculated simulately. The main insulation electric field is calculated with finite element method. the main insulation electric field area is divided into three sub-regions to calculation. The distributions of electric potential and the electric field intensity in different regions are obtained. calculated the electric field insulation margin of related parts. For the longitudinal insulation electric field, established circuit model of winding under the action of thunder lightning extra-high voltag, calculated the insulation margin of corresponding oil road under the action of full wave and chopped wave, and provided the theoretical reference basis for the insulation design and improvement.
出处
《电气技术》
2008年第8期43-46,共4页
Electrical Engineering
关键词
变压器
主绝缘
电场强度
纵绝缘
绝缘裕度
transformer
main insulation
electric field intensity
longitudinal insulation
insulation margin
