Abstract

A mathematical model is proposed that allows simulating the currents in the transformer windings during turn shorting when the supply voltage is unbalanced in any load mode. The results of simulation of currents in windings and shorted coils depending on their number in the primary winding in the idle and load modes are presented. Verification of the adequacy of the model by comparing the results of calculation and experiment for the TT-6 transformer showed that the error in simulated currents when shorting a small number of turns does not exceed 10% and meets the requirements of relay protection.

中文翻译：

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三相三绕组变压器绕组中的线圈短路仿真

摘要

提出了一个数学模型，该模型允许在任何负载模式下电源电压不平衡时，在匝间短路期间模拟变压器绕组中的电流。给出了绕组和短路线圈中电流的仿真结果，这些电流取决于空载和负载模式下初级绕组中的电流数量。通过比较TT-6变压器的计算结果和实验结果，验证了模型的适当性，结果表明，短路短匝时模拟电流的误差不超过10％，并且符合继电器保护的要求。