几种削减变压器励磁涌流的方法

Several Methods to Reduce Transformer Inrush Current

变压器在空载合闸时将产生很大的励磁涌流,这种励磁涌流对变压器的稳定运行极为不利。为削减这种励磁涌流,提出了3种方法:控制三相开关合闸的时间法,内插电阻法和改变变压器绕组的分布法。理论分析和实验表明,这3种方法各有其优缺点,都能有效地削减励磁涌流,前两种方法的可行性更好。

Large inrush current occurs when energizing unloaded transformer in power system, which provides unfavorable condition in transformer operation. Three methods are proposed in this paper to reduce inrush current： by controlled three-phase switching; by resistor insertion and by changing the distribution of coil winding. The three methods are proved to be effective both by the theoretical and practical considerations which all have advantages and disadvantages, but the feasibility of the former two methods is better.