【摘要】 从变压器励磁涌流的产生是由于变压器铁心饱和这一原理出发,提出了一种利用计算等效瞬时励磁电感平均值来区分励磁涌流与短路电流的方法。理论分析、EMTP仿真及TEQSIM混合仿真结果均表明:该算法原理清晰,不需考虑变压器参数,特征明显,能够实现轻微匝间短路的识别。更多还原

【Abstract】 According to the mechanism of producing transformer excitation surge current caused by saturation of transformer core, the paper put forward a kind of method to discriminate excitation surge current and short-circuit current adopting calculation of equivalent instant excitation inductance average value. The results of theory analysis, EMTP simulation and TEQSIM mixed simulation show that the principles of this algorithm are distinct, transformer parameters cannot be considered, it can realize the identification of turn to turn light shortcircuit.更多还原