摘要
针对统一潮流控制器(Unified Power Flow Controller,UPFC)在dq旋转坐标系下数学模型的非线性、强耦合的特点,以及交叉解耦控制鲁棒性差的问题,提出基于无源控制理论的非线性控制策略。首先通过对UPFC系统的拓扑结构与工作机理的分析,建立数学模型与Euler-Lagrange(EL)模型;其次在交叉解耦控制策略的基础之上引入无源控制理论设计功率外环与电流内环的无源控制器;最后在MATLAB/Simulink中进行仿真验证。结果表明,UPFC在调节潮流时既保留了交叉解耦控制的优点,稳定了直流母线电压,又提高了系统的鲁棒性。
In view of nonlinearity and strong coupling of the mathematical model of the unified power flow Controller（ UPFC） in the rotating dq coordinate system,as well as poorrobustness of cross decoupling control,a nonlinear control strategy was proposed on the basis of passive control theory. Firstly,the topological structure and working mechanism of the UPFC was analyzed,and its mathematical model and Euler-Lagrange（ EL） model were established. Secondly,on the basis of the cross decoupling control strategy,passive control theory was introduced to design passive controllers for the power outer loop and current inner loop. Finally,MATLAB/Simulink simulation results showed that,in flow regulation,UPFC could not only retain the advantages of cross decoupling control and stabilize DC bus voltage,but also improve system robustness.
作者
申淑丽
周渊深
Shen Shuli;Zhou Yuanshen(College of Information and Control Engineering,China Mining University,Xuzhou Jiangsu 221000,China;College of Electronic Engineering,Huaihai Institute of Technology,Lianyungang Jiangsu 222000,China)
出处
《电气自动化》
2018年第4期99-101,114,共4页
Electrical Automation
