变压器内部故障仿真模型的设计

STUDY OF SIMULATION OF TRANSFORMER WITH INTERNAL FAULTS

为研究变压器内部故障时电气量的变化规律,提出了改进的变压器内部故障模型,该模型考虑了线圈的不均匀分布特性,并对变压器内部故障进行了仿真实验。内部故障试验结果与仿真实验结果比较吻合,从而验证了改进模型的正确性。

In order to research the variation law of electrical quantities such as the primary and secondary currents and the terminal voltages at the primary and secondary side when internal fault occurred within power transformer, the existing simulation model for internal fault in power transformer is improved, based on this original model the nonuniform distribution of the windings in transformer is considered, then the simulation of power transformer internal fault is carried out with simulation software ATP. The comparison of the results from simulation and those from experiments shows that the improved model is more accurate than existing one.