In this paper, power frequency model for unified power flow controller (UPFC) is presented with its DC link capacitor dynamics included. A novel interface of UPFC to AC network for transient stability study is then suggested and realised using Power System Toolbox (PST) of MATLAB. The control strategies for UPFC shunt and series elements are also discussed. Computer results on a 4-generator interconnected test power system show that the convergence and accuracy of the suggested interface are challenging and the suggested interface makes it very easy to incorporate the UPFC model into the conventional transient stability programme. The results also show that the UPFC control strategy had strong impacts on the performance of UPFC.
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机译:本文提出了统一潮流控制器(UPFC)的工频模型,其中包括直流环节电容器的动态特性。然后提出并使用MATLAB的Power System Toolbox(PST)提出并实现了UPFC与交流网络的新型接口,用于瞬态稳定性研究。还讨论了UPFC分流和串联元件的控制策略。在四发电机互连测试电源系统上的计算机结果表明,所建议接口的收敛性和准确性具有挑战性,并且所建议接口使将UPFC模型轻松集成到常规暂态稳定程序中非常容易。结果还表明,UPFC控制策略对UPFC的性能有很大影响。
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