基于单一矢量的两电平逆变器快速模型预测控制  

Fast Model Predictive Control of Two-Level Inverter Based on Single Vector

作　　者：陈琢 王琛琛[1] 成前 Chen Zhuo;Wang Chenchen;Cheng Qian(School of Electrical Engineering Beijing Jiaotong University,Beijing 100044 China)

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《电工技术学报》2021年第S02期654-664,687,共12页Transactions of China Electrotechnical Society

摘　　要：近年来被广泛应用于两电平逆变器(2L-VSI)控制的有限集模型预测控制(FCS-MPC)算法,由于存在计算量大、权重因子分配复杂等问题,严重限制了其实用性。该文结合无差拍控制思想提出一种基于单一矢量的快速模型预测控制(F-MPC)算法,与传统FCS-MPC需要8次预测才能得到最优矢量相比,该算法只需1次预测和矢量定位即可确定最优矢量,在大幅度降低计算量的同时保证了与FCS-MPC在两种单一电流控制代价函数形式下的等价性。在此基础上,当两电平逆变器的开关频率和电流一起作为控制目标时,该算法通过简单地调整滞环区域宽度解决了权重因子分配复杂的问题。该文从稳态、动态性能等方面对F-MPC和FCS-MPC算法进行单一控制目标下的等价性验证;同时验证了F-MPC算法的多变量控制能力。仿真和实验结果验证了所提方法的正确性和有效性。In recent years,finite control set model predictive control(FCS-MPC),which has been widely used in the control of 2L-VSI,had been severely restricted by heavy computation burden and complex weighting factor assignment.Based on the idea of deadbeat control,fast model predictive control(F-MPC)algorithm based on single vector is presented in this paper.Compared with the traditional FCS-MPC which requires 8 predictions to obtain the optimal vector,this algorithm only needs one step prediction and vector positioning,which significantly reduces the computation burden while ensuring the equivalence with traditional FCS-MPC under two forms cost functions of single current control.Moreover,when the switching frequency of the 2L-VSI is considered in the control targets,this method solves the problem of complex weighting factor assignment by simply adjusting the width of hysteresis area.This paper verifies the equivalence of F-MPC and FCS-MPC algorithms under single current control from the aspects of steady state and dynamic performance.At the same time,it verifies the multi-variable control ability of F-MPC algorithm.The simulation and experimental results confirm the effectiveness of the proposed methods.

关 键 词：有限集模型预测控制 两电平逆变器 无差拍控制 多控制目标 

分 类 号：TM464[电气工程—电器]