三电平ANPC变换器中点电压平衡的MPC  

Model Predictive Control Strategy of Neutral-point Potential Balancing for Three-level ANPC Converter

作　　者：刘影[1] 胡存刚[1,2,3] 马大俊 陈权[1,2,3] LIU Ying;HU Cun-gang;MA Da-jun;CHEN Quan(Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学电气工程与自动化学院,安徽合肥230601 [2]安徽省工业节电与电能质量控制协同创新中心(安徽大学),安徽合肥230601 [3]教育部电能质量工程研究中心(安徽大学),安徽合肥230601

出　　处：《电力电子技术》2018年第8期110-113,共4页Power Electronics

基　　金：国家自然科学基金(51777001;51637001)~~

摘　　要：针对三电平有源中点箝位型(ANPC)变换器的中点电压平衡问题,提出了一种三电平ANPC变换器中点电压平衡的模型预测控制(MPC)策略。根据变换器拓扑的数学模型,建立了三电平ANPC变换器的虚拟磁链模型;通过对变换器三相负载电流进行采样,计算出中点电压的偏移量;在确保磁链误差在一定范围的前提下,有效减少了中点电压的偏移量,实现了对中点电压平衡的控制。分别搭建了三电平ANPC变换器的仿真模型和实验平台,仿真与实验结果表明所提控制策略易于数字实现且能较好地控制中点电压平衡。The unbalancing of neutral-point potential is an inherent problem for three-level active neutral-pointclamped（ANPC） converter. An NP balancing control strategy based on virtual flux model predictive control（MPC） is proposed.The strategy is based on the mathematical model of the converter,and established a virtual flux model of three-level ANPC converter; the converter is sampled by three-phase load current, calculate the offset neutral-point potential; Premise to ensure the flux error in a certain range, effectively reduce the offset of the neutral-point potential, so that achieve neutral-point potential control.Lastly,the simulation model and experimental platform is built, and the results are provided to verify the flexible,easy to implement and effectiveness of the proposed control strategy.

关 键 词：变换器 有源中点箝位 虚拟磁链 模型预测控制 

分 类 号：TM46[电气工程—电器]