多机电力系统H_∞滑模分散鲁棒励磁控制器设计

H_∞ Sliding Mode Robust Excitation Controller for Multi-machine Power System

针对电力系统鲁棒励磁控制模型的非线性和不确定性等特点,提出了一种应用于多机电力系统的抑制不完全满足匹配条件干扰的分散鲁棒励磁控制律。首先通过反馈线性化技术预设反馈控制律将多机系统分散解耦,且控制律中均为本地可测量量,并对解耦后的系统设计了H∞滑模励磁控制器(HSMEC)。最后根据实际电力系统对暂态稳定和静态稳定的要求,结合HSMEC和线性最优励磁控制(LOEC)的优点,设计了HSMEC+LOEC综合励磁控制器。仿真结果表明,所设计的控制器能够快速有效地稳定电力系统,且具有良好的动态性能。

Due to the nonlinear and uncertainty of power system robust excitation control model, a decentralized robust control law for multi-machine power system is proposed to attenuate mismatching disturbances. First, a preset control law is designed with local measurable variables to decentralize and decouple multi-machine system. Then a H∞ sliding mode variable structure robust excitation controller is designed for the system. Finally, a HSMEC＆LOEC excitation controller is designed according to the requirement of transient and static stability. The simulation results show that the proposed excitation controller can improve the power system stability effectively and has good dynamic responses.