三相逆变电路的离线模型预测控制研究

针对电力电子电路传统开关函数模型只描述电路的控制变迁而忽略了电路的条件变迁,可能导致电路动态信息丢失这一问题,建立了电力电子电路的混合逻辑动态模型,并将其作为预测模型。在此基础上,以电路可行解代替最优解,将可行解及移动闭塞的思想用于电路的模型预测控制(MPC),可有效减少控制序列总数、降低开关频率,实现电路MPC的快速求解,克服了电路MPC的计算难题。详细研究了电力电子电路控制序列的求解算法及实现过程,并以三相逆变电路为例验证了控制方法的可行性与有效性。

The Off-Line Model Predictive Control for Three-Phase Inverter

Traditional switch function model for power electronics circuits only describes the control changes of circuits rather than their conditional changes,which may cause a loss of their dynamic information. Considering this fact,this paper establishes a mixed logic dynamic( MLD)model for power electronic circuits as a predictive model. Based on it,the optimal solution will be replaced by the feasibility solution which,together with the move blocking principle,will be applied to the circuit model predictive control( MPC)so as to effectively reduce the total number of control sequence and the switch frequency,and realize the fast solution of circuits,which offers a solution to the hard problem of calculating circuit MPC. The paper elaborates the algorithm and realization procedure of the control sequence of power electronic circuits and verifies the feasibility and validity of the algorithm by the three-phase inverter circuit.