统一潮流控制器电磁暂态过程数字仿真的初步研究

首先对ＵＰＦＣ并联部分ＳＴＡＴＣＯＭ的电磁暂态特性进行了详细的仿真。采用ＧＴＯ结构的逆变器，构造了两种类型的ＳＴＡＴＣＯＭ产暂态模型。在ＳＴＡＴＣＯＭ仿真的基础上，进行了ＵＰＦＣ一些电磁暂态特性的仿真。仿真采用了常规的ＰＩＤ控制方法，适当选取了ＰＩＤ参数，能够使设备表现出良好的性能。仿真结果表明，，ＰＵＦＣ能够对系统的潮流和电压进行有效的控制。仿真工作晃应用ＥＭＴＰ进行的。

PRELIMINARY STUDY ABOUT DIGITAL SIMULATION OF ELECTROMAGNETIC TRANSIZNT PROCESSES OF UPFC

To obtain the electromagnetic transient characteristics of STATCOM,equal to the shunt part of UPFC,some simulations are performed.Two types of STATCOM,made up of GTO\|based inverter,are involved.Referring to the STATCOM's simulations,the simulations about UPFC are carried on.All the simulations are based on PID controlling strategies.Properly selecting PID parameters,good performances about these devices can be obtained. The results of simulations demonstrate that UPFC can effectively control the power flow and voltage characteristics of power system.These simulations are based on EMTP.