一种快捷的变压器短路电流分析方法

An efficient transformer short-circuit current analysis method

要弄清变压器一侧短路时另一侧电流的大小和相位,一般采用对称分量法,但该方法操作时较为繁杂。为了在较短时间内读懂变压器不对称短路故障录波图,以便事故发生后在最短时间内判断出变压器的故障性质和保护的动作行为,给出了一种快捷的变压器两侧电流转换计算方法。

In order to find the value and phase of a side current of a transformer under condition of short-circuit fault in opposite side,the method of symmetric components is used usually. But the operation of the method is more complicated. In order to understand the graph of fault recorder of the asymmetric short-circuit fault of the transformer in shorter time and to judge out the fault nature of the transformer and the action of the protection device in the shortest time after fault,a fast transition and calculation method of the currents of two sides of the transformer was given.