摘要
特快速暂态过电压(VFTO)作用下分段层式变压器线圈的电位分布计算对于变压器的绝缘设计是非常重要的。由于GIS中开关投切产生的陡波前过电压对变压器的绝缘危害极大,为了准确计算线圈中的快速暂态过程,提出了一种以单层线圈为单元的集总参数线圈模型,介绍了电感、电容、电阻等参数计算的物理模型和数学公式。实测和计算1台变压器线圈模型电位分布的结果近似一致,说明集总参数线圈模型和计算方法是正确可行的,可以为变压器线圈合理的绝缘设计提供理论依据。
It is very important for transformer insulation design to calculate winding potential distribution of the transformer with subsection and layer winding under VFFO （Very Fast Transient Over-vohage）, VFFO generated by GIS switchgear switching is very harmful to transformer insulation. In order to accurately simulate the very fast transient process in the winding, a lumped parameter model with single layer winding unit is proposed. Physical model and math formula for the calculation of inductance, capacitance and resistance parameters are introduced. The consisteney between simulation and measurement results in an actual transformer winding verifies the correctness of proposed model, which provides theoretical basis for transformer winding insulation design.
出处
《中国电力》
CSCD
北大核心
2012年第4期42-46,共5页
Electric Power
关键词
特快速暂态过电压
变压器线圈
集总参数
电位分布
very fast transient over-voltage （ VFFO ）
transformer with subsection and layer winding
lumped parameter model
potential distribution
