三电平ANPC变换器快速模型预测控制策略研究

Research on Fast Model Predictive Control Strategy for Three-level ANPC Converter

针对有限控制集模型预测控制(MPC)策略在多电平变换器中预测模型和价值函数在线计算量大的不足,提出一种快速有限控制集MPC策略。该算法分两步预测,第一步根据价值函数代入6个正小矢量计算,从中选择一个值最小的正小矢量;第二步根据第一步计算出的价值函数最小的正小矢量,计算以该正小矢量为中心的四边形矢量的价值函数,最终选择一个最小的值作为输出矢量,这样大幅降低计算量,提高计算效率。最后,通过仿真和实验验证了该控制策略的可行性与有效性。

A fast finite control set model predictive control(MPC) method is proposed to overcome the shortcoming of the large online computation of predictive model and cost function in multilevel converters.The algorithm is divided into two steps,the first step is to calculate six positive and small vectors according to the cost function,and choose the one with the smallest value.The second step is to calculate the positive and small vectors with the smallest cost function based on the first step,calculate the cost function of the quadrilateral vector centered on the positive and small vectors,and finally select the smallest value as the output vector,which greatly reduces the amount of calculation and improves the calculation efficiency.Finally,the simulation and experimental results verify the effectiveness and feasibility of the proposed control strategy.