大型超高压变压器线圈表面电场的分析计算

CALCULATING THE ELECTRIC FIELD ON THE COIL SURFACE OF A GIANT SUPER-HIGH VOLTAGE TRANSFORMER

大型超高压变压器的绝缘问题是电力系统中的重大课题。在油纸绝缘结构中，紧靠线圈表面油道中的场强，和该处的绝缘结构对确定主绝缘距离起决定作用。对此电场作了计算分析，结果说明：相间电场沿面畸变严重，安排绝缘结构时，主纵绝缘应综合考虑。

The isolation for a giant super-high-voltage transformer is a paramountly important problem in the power system. The intensity of electric field under the oil-paper isolation and tightly being on the coil surface and the structure of isolation are the decision factors in determining the distance of the main isolation. The electric field is calculated and analyzed. The result shows that the distortion along the surface of interphase electric field is significant. It must be considered comprehensively about the principal and subordinate isolations in arrangement of the isolation construction.