Using the energy-based Hamiltonian function method, this paper investigates the decentralized robust nonlinear control of multiple static var compensators (SVCs) in multimachine multiload power systems. First, the uncertain nonlinear differential algebraic equation model is constructed for the power system. Then, the dissipative Hamiltonian realization of the system is completed by means of variable transformation and prefeedback control. Finally, based on the obtained dissipative Hamiltonian realization, a decentralized robust nonlinear controller is put forward. The proposed controller can effectively utilize the internal structure and the energy balance property of the power system. Simulation results verify the effectiveness of the control scheme.
基于SimPowerSystem的有源电力滤波器(Active Power Filter,APF)仿真存在代数环、仿真耗时长、占用资源多等问题,通过对并联型三相三线制APF的切换子系统进行动态分析,提出一种新的APF仿真方法。利用Simulink搭建切换子系统的仿真模型,整合后建立了APF主电路的统一模型。将APF视为离散事件动态系统,基于统一仿真模型和有限状态机理论,结合Stateflow模块实现APF的动态仿真。仿真结果表明,该方法可以充分反映APF的动态特性,有效解决了代数环问题,大大提高了仿真效率,为APF性能分析和控制器验证提供了新的途径。
