CAJ | 학술논문

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.实测和计算一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.
특쾌속잠태과전압(VFTO)작용하분단층식변압기선권적전위분포계산대우변압기적절연설계시비상중요적.유우GIS중개관투절산생적두파전과전압대변압기적절연위해겁대,위료준학계산선권중적쾌속잠태과정,제출료일충이단층선권위단원적집총삼수선권모형,개소료전감、전용、전조등삼수계산적물리모형화수학공식.실측화계산일태변압기선권모형전위분포적결과근사일치,설명집총삼수선권모형화계산방법시정학가행적,가이위변압기선권합리적절연설계제공이론의거.
It is very important for transformer insulation design to calculate winding potential distribution of the transformer with subsection and layer winding under VFTO(Very Fast Transient Over-voltage). VFTO generated 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. The physical model and math formula for the calculation of the inductance,capacitance and resistance parameters are introduced. The consistency between simulation and measurement in an actual transformer winding verifies the correctness of proposed model,which provides the theoretical basis for reasonable transformer winding insulation design.