Inverse-system control scheme for unified-power-flow controller
统一潮流控制器逆系统方法控制策略

The mathematical model of the unified-power-flow controller(UPFC) in a synchronous rotating dq coordinate system reflects that it is a strong coupling nonlinear system. To avoid the difficulties in designing the controllers for the system, an inverse-system control is proposed. Firstly, using the inverse-system method, we linearize and decouple the original system of UPFC into a pseudo-linear system. Secondly, employing the variable-structure-control(VSC) theory, we design the variable-structure controllers of the pseudo-linear system for controlling the system of UPFC. Finally, by performing simulations on a simulation model, we validate the feasibility and effectiveness of the proposed control strategy.