基于统一模型的有源电力滤波器仿真研究

Simulation of Active Power Filter Based on Uniform Simulation Model

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。

The algebraic loop is widely existed in the SimPowerSystem-based simulation of Active Power Filter （APF）, which is extremely time-consuming and needs many memory resources. An efficient simulation method of APF was proposed based on analyzing the dynamic behavior of the switched subsystems of parallel three-phase three-line APF. The simulation model of each subsystem was built via Simulink. A unified simulation model of the main circuit of APF was then obtained by integrating all the subsystems. Because APF could be regarded as discrete event dynamic system, based on the unifed simulation model and Finite State Machine theory, the dynamic simulation of APF was completed using the Stateflow module. Simulation results show that the simulation method can effectively present the dynamic performances of APF and avoid the algebraic loop problem. So the simulation efficiency can be improved significantly. The proposed method provides a new approach to the performance analysis and controller verification of APF.