高电压技术2024，Vol.50Issue(3)：1264-1271,8.DOI:10.13336/j.1003-6520.hve.20231255
基于冗余矢量的T型三电平双向变换器中点电位平衡模型预测控制
Model Predictive Control for Midpoint Potential Balance of T-type Three-level Bidirectional Converter Based on Redundant Vector
摘要
Abstract
The T-type three-level bidirectional converter is suitable for application in low-voltage AC/DC hybrid distri-bution network interconnection scenarios due to its advantages of low loss and high output power quality.In view of the imbalance of midpoint potential on the DC side of T-type three-level bidirectional converter,model-predictive controls have good application value because it is easy to realize multi-objective optimization.However,the traditional finite set model predictive control(FCS-MPC)has the problem of difficulty in weight factors adjusting,which affects the midpoint potential control effect.To solve the problems above,a model-predictive control for midpoint potential balance based on redundant vectors is proposed,which uses the characteristics of redundant small vectors to realize the control of midpoint potential balance and avoid the selection of weight factors.On this basis,the cost function is used to calculate the action time of the vector and predict the optimal switching frequency to improve the steady-state performance of the system.Fi-nally,the effectiveness of the proposed strategy is verified through experimental testing.关键词
T型三电平双向变换器/模型预测控制/中点电位平衡/冗余矢量/交直流混合配电网/固定开关频率Key words
T-type three-level bidirectional converter/model predictive control/midpoint potential balance/redundant vectors/AC-DC hybrid distribution network/fixed switching frequency引用本文复制引用
王勋嵩,李锐华,许嘉杰,王汉卿..基于冗余矢量的T型三电平双向变换器中点电位平衡模型预测控制[J].高电压技术,2024,50(3):1264-1271,8.基金项目
国家自然科学基金(52207243). Project supported by National Natural Science Foundation of China(52207243). （52207243）
