基于三步离散法的DC-DC变换器模型预测控制研究  

Research on Model Predictive Control of DC-DC Converters Based on the Three-Step Discrete Method

作　　者：陈荣[1] 张胜涛 李兆伟 毛永强 CHEN Rong;ZHANG Sheng-tao;LI Zhao-wei;MAO Yong-Qiang(College of New Energy,China University of Petroleum,Qingdao Shandong 266580,China;State Grid Linyi Power Supply Company,Linyi Shandong 276000,China)

机构地区：[1]中国石油大学(华东)新能源学院,山东青岛266580 [2]国网临沂供电公司,山东临沂276000

出　　处：《计算机仿真》2022年第7期274-280,共7页Computer Simulation

基　　金：国家自然科学基金面上项目(51777216)。

摘　　要：为了改善DC-DC变换器的控制精度和动态性能,设计了一种基于三步离散法的模型预测控制策略。所提策略在连续导通模式下,通过细化变换器可控开关管占空比所在区间,建立了Buck变换器、Boost变换器和双管Buck-Boost变换器的精确预测模型。此外,通过增设选择环节提高双管Buck-Boost变换器两模式工作状态下占空比区间选择准确度。最后,基于预测模型推导最优控制律,并建立了基于MATLAB/Simulink的仿真模型。仿真结果表明,所提控制方案能够有效降低输出电压超调并具有良好的动态响应特性。To improve the control accuracy and dynamic performance of a DC-DC converter,a model predictive control strategy based on the three-step discrete method is presented in this paper.By dividing the duty ratio interval,accurate predictive models of buck converter,boost converter,and two-switch Buck-boost converter working in the continuous-conduction mode were established.In addition,a selection scheme was adopted to improve the accuracy of the duty ratio interval selection of the two-switch Buck-boost converter with the two-mode condition.Finally,the optimal control laws were derived based on predictive models,and the simulation model using MATLAB/Simulink was built.The simulation results show that the proposed control scheme can effectively reduce the output voltage overshoot,and the dynamic response characteristic is good.

关 键 词：变换器 模型预测控制 三步离散法 

分 类 号：TM743[电气工程—电力系统及自动化]