船舶电力系统带电压反馈的超导磁储能装置的H_∞鲁棒非线性励磁控制

Nonlinear H∞ Robust Excitation Controller of Superconducting Magnetic Energy Storage with Voltage Feedback in Ship Power System

电力系统的暂态稳定在控制方面是典型的非线性问题。针对非线性特性,提出直接反馈线性化和非线性鲁棒H∞控制理论加超导磁储能系统(SMES)相结合的励磁控制器设计方法,在励磁控制规律中引入机端电压偏差的比例积分控制,使设计的控制器不仅提高了电力系统的暂态稳定,而且当机械功率由于负荷变化机端电压仍能回到给定点运行。使用MATLAB/SIMULINK仿真结果表明提出的带电压反馈的控制器在增强电力系统的稳定性及改善机端电压精度有很好的控制效果。

The transient stability of the power system is a typical nonlinear control problem. Combined with the direct feedback linearization and nonlinear robust H∞ control theory and superconducting magnetic energy storage （SMES ） unit. an excitation controller is proposed, which takes the nonlinearity of power system and introduces the terminal voltage deviation feedback of generator based PI control to control rules. The design of the controller not only improves the transient stability of the power system, but also the terminal voltage about the given operating point when mechanical power varies with load. Simulation results show that the controller with voltage feedback has better control effect on enhancing stabilization of power system and generator terminal voltage by Matlab/Simulink.