基于级联H桥多级有源整流器的双模型预测控制研究  

Dual model predictive control research based on cascadedH-bridge multi-stage active rectifier

作　　者：杜仕海 张代润[1] 黄伟[1] 涂丹凤 Du Shihai;Zhang Dairun;Huang Wei;Tu Danfeng(School of Electrical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学,电气工程学院,成都610065

出　　处：《电测与仪表》2021年第3期112-117,共6页Electrical Measurement & Instrumentation

摘　　要：在级联H桥(Cascaded H-Bridge,简称CHB)多级有源整流器中,针对其常使用PI控制器难以准确调节、反应不够快速等问题,提出了一种新颖的CHB多级有源整流器的双模型预测控制(MPC)方法。一次模型是将CHB多级有源整流器的数学模型离散化,应用离散化公式对采样数据进行预测,通过预测值与参考值的差值来控制目标函数。二次模型利用功率守恒法计算参考源电流,省去了基于PI控制的外环调节。应用了一个基于Luenberger的观察器来估计直流负载电流,从而减少传感器数量。通过MATLAB/Simulink对单相7电平CHB有源整流器的仿真实验,验证了该方法在稳态和瞬态条件下的有效性。In cascaded H-Bridge(CHB)multi-stage active rectifier,a novel double model predictive control(MPC)method is proposed to solve the problems of PI controller which is difficult to accurately adjust and the response is not fast enough.The first model is to discretize the mathematical model of CHB multi-stage active rectifier,and then,predict the sampling data by using the discretization formula,and finally,control the objective function by the difference between the predicted value and the reference value.The secondary model adopts the power conservation method to calculate the reference source current,eliminating the outer loop regulation based on PI control.In addition,a luenberger-based observer is used to estimate the DC load current,thus reducing the number of sensors.Finally,the simulation experiment of single-phase 7-level CHB active rectifier with MATLAB/Simulink verifies the validity of proposed method under steady and transient conditions.

关 键 词：级联H桥 模型预测控制 Luenberger观察器 

分 类 号：TM461[电气工程—电器]