基于改进滑模控制的电网模拟器逆变侧设计

Inverter design of grid simulator based on improved sliding mode control

文中提出了一种基于趋近律的改进滑模控制方法,改善了电网模拟器的逆变侧设计。文章选择了合适的电网模拟器拓扑结构,建立了三相全桥逆变器的数学模型,通过双幂次滑模趋近律对原有的控制方法进行了改善。在Simulink中设计了系统的控制框图并进行了仿真结果对比;基于PHIL实时仿真技术搭建了电网模拟器实验平台并进行了实验,结果表明所提出的改进滑模控制能够有效削减抖振现象,同时提高系统的稳定性。

An improved sliding mode control method based on the approach law is proposed in this paper,which improves the inverter side design of the grid simulator.The appropriate power grid simulator topology is selected,and the mathematical model of the three-phase full-bridge inverter is established in this research.The original control method is improved by the double-power sliding mode approaching law.The control block diagram of the system was designed in Simulink and the simulation results were compared.Based on the PHIL real-time simulation technology,the grid simulator experimental platform was built and the experiment was carried out.The results show that the improved sliding mode control can effectively reduce the chattering phenomenon and improve the stability of the system.