向无源网络供电的VSC-HVDC系统的新型控制器设计  

New control design for VSC-HVDC supplying passive networks

作　　者：包宗贤[1] 邹超[2] 

机构地区：[1]四川建筑职业技术学院,四川绵阳618000 [2]西南交通大学电气工程学院,四川成都610031

出　　处：《电力系统保护与控制》2008年第14期22-27,共6页Power System Protection and Control

摘　　要：在同步旋转坐标系下采用电压源型高压直流输电的暂态数学模型,提出一种向无源网络供电的电压源型高压直流输电系统的新型控制策略。基于状态反馈线性化的逆系统方法,推导电压源型高压直流输电系统的逆系统模型,构造出伪线性系统,实现了对电压源型高压直流输电系统有功功率和无功功率的解耦,最后采用滑模变结构控制理论对该伪线性系统进行综合,设计出滑模变结构控制器,并对于反馈线性化中重要的隐动态问题进行了讨论,保证了控制系统的稳定性。仿真结果表明,该控制器具有较好的动态性能和鲁棒性。The transient mathematical model for the VSC-HVDC system in d-q synchronous reference frame is developed and its new controllers are designed. It applies the inverse system method based on nonlinear feedback linearization theory. An inverse system model of VSC-HVDC system is deduced and a pseudo linear system is constructed for the decouple control of the active and reactive power. Finally, by synthesizing the pseudo linear system, a sliding mode variable structure controller is proposed. Furthermore, as an essential problem in nonlinear feedback linearization, the zero dynamics is researched in detail so that the stability of the control system is guaranteed. The simulation results show that the control strategy mentioned in this paper has good dynamics and steady state performance.

关 键 词：滑模变结构控制 电压型高压直流输电 逆系统理论 伪线性系统 隐动态 

分 类 号：TM571[电气工程—电器]