改进的并网逆变器模型预测控制方法  

Improved Model Predictive Control Method Based on Gridconnected Inverter

作　　者：张子成[1] 陈阿莲[1] 邢相洋[1] ZHANG Zicheng;CHEN Alian;XING Xiangyang(School of Control Science and Engineering,Shandong University,Jinan 250061,China)

机构地区：[1]山东大学控制科学与工程学院,济南250061

出　　处：《电源学报》2018年第2期137-143,共7页Journal of Power Supply

基　　金：国家自然科学基金资助项目(51377101);教育部新世纪优秀人才支持计划资助项目(NCET-13-0339)~~

摘　　要：三相并网逆变器因具有高效率、高功率以及低成本等优点而备受关注,模型预测控制鲁棒性强、动态响应快,因此被广泛应用于并网逆变器的控制中。但传统预测控制存在开关状态切换不规律的缺点,将降低电流跟踪精度,产生输出脉动和电磁噪声。针对上述缺点,提出了一种基于开关状态选择和矢量作用时间的改进预测控制方法,将矢量作用时间作为一个维度参与控制,使电流的跟踪精度得到改善,并减少逆变器输出电流畸变和电磁噪声。仿真和实验结果验证了算法的可行性与有效性。Three-phase grid-connected inverters have been popularized owing to their high efficiency,higher power and low cost.The model predictive control method,which has the merits of high robustness and fast dynamic response,has been widely applied to the control of grid-connected inverters.However,the traditional predictive control has the disadvantage of irregular switching operation,which will reduce the current tracking accuracy and generate output pulse as well as electromagnetic noises.To solve the above problems,an improved model predictive control method is proposed based on the selection of switching states and the effective time of vectors.The second factor is considered as a dimension in the control,which improves the current tracking accuracy and reduces the inverter’s output current distortion and electromagnetic noises.The feasibility and effectiveness of the proposed method were verified by simulation and experimental results.

关 键 词：三相并网逆变器 改进预测控制 电流跟踪精度 开关切换 有效作用时间 

分 类 号：TM464[电气工程—电器]