统一潮流控制器逆系统方法控制策略

Inverse-system control scheme for unified-power-flow controller

中文关键词  统一潮流控制器  逆系统方法  变结构控制  伪线性系统

英文关键词  unified-power-flow controller  inverse-system method  variable-structure control  pseudo-linear system

中文摘要

      统一潮流控制器在同步旋转dq坐标系下的数学模型, 反映出统一潮流控制器是一个强耦合的、非线性的系统. 为解决对这个强耦合、非线性系统直接设计控制器的困难, 采用逆系统方法, 将原系统线性化且解耦, 构造出一个伪线性系统. 然后, 运用变结构控制, 针对构造出的这个伪线性系统, 设计该系统的控制策略以实现对统一潮流控制器综合控制. 最后, 通过建立仿真试验模型进行仿真, 仿真的结果验证了文中提出的这种控制策略的可行性和有效性.

英文摘要

      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.