基于MATLAB的500kV自耦变压器建模及仿真

MATLAB Based Modeling and Simulation of 500 kV Autotransformer

基于所推导的500kV自耦变压器数学模型，利用MATLAB软件中的电力系统模块库（PSB）建立了仿真模型。以500kV七甸变电站自耦变压器为例进行仿真分析，结果显示，主变压器空载合闸励磁涌流可达到1．9倍的额定电流值。因此，在进行主变合闸操作时过电流保护（譬如充电保护）不宜投入，以避免合闸失败。

Based on the mathematical model of 500 kV autotransformer derived in this paper, a simulation model is built up by using power system block set （PSB） in MATLAB software. With the simulation model, anlysis on the 500 kV autotransformer in Qidian substation, as an example, is carried out, and the results show that the no-load closing inrush current may reach upto 1.9 times of the rated current value when transformer is in closing operation. Therefore, the over current protection （such as charging protection） should not be put in during the operation as to avoid possible closing failure.