基于动态矩阵控制的混合三电平双有源桥变换器回流功率优化  

Optimization of Backflow Power of Hybrid Three-level Dual Active Bridge Converter Based on Dynamic Matrix Control

作　　者：刘文强 刘春喜[1] 蔡金汕 LIU Wenqiang;LIU Chunxi;CAI Jinshan(Faculty of Electrical and Control Engineering,Liaoning Technical University,Huludao 125105)

机构地区：[1]辽宁工程技术大学电气与控制工程学院,葫芦岛125105

出　　处：《电气工程学报》2025年第1期150-159,共10页Journal of Electrical Engineering

基　　金：辽宁省教育厅科学研究经费重点攻关资助项目(LJ2020ZD004)。

摘　　要：针对扩展移相控制下混合三电平双有源桥直流电/直流电(Direct current direct current,DC-DC)变换器普遍存在回流功率大、动态响应慢、鲁棒性不强等问题,提出一种基于输出电压动态矩阵控制与卡罗需-库恩-塔克条件(Karush-Kuhn-Tucker,KKT)实现回流功率优化的混合控制策略。建立了传输功率数学模型,对回流功率特性进行分析,并推导了在不同工作模式下实现最小回流功率的最优移相比组合;从预测模型、滚动优化和反馈校正三个步骤阐述了动态矩阵控制预测电压实现过程,提高系统的动态性能。最后,通过与传统扩展移相控制以及传输功率误差最小控制进行比较,仿真和试验结果表明,所提控制策略可以在全功率范围内实现回流功率的优化,同时也改善了变换器的动态响应性能,验证了该方法的正确性与有效性。Aiming at the problems of high backflow power,slow dynamic response and weak robustness of hybrid three-level dual active bridge direct current direct current(DC-DC)converters under extended phase shift control,a hybrid control strategy based on output voltage dynamic matrix control and Karush-Kuhn-Tucker(KKT)condition is proposed to optimize backflow power.The mathematical model of transmission power is established and the characteristics of reflux power are analyzed,and the optimal combination of phase shift ratio to achieve the minimum backflow power in different operating modes is derived.The realization process of dynamic matrix control voltage prediction is described from three steps of prediction model,rolling optimization and feedback correction,so as to improve the dynamic performance of the system.Finally,compared with the traditional extended phase shift control and transmission power error minimization control,the simulation and experimental results show that the proposed control strategy can optimize the reflux power in the full power range,and also improve the dynamic response performance of the converter,which verifies the correctness and effectiveness of the proposed method.

关 键 词：混合三电平双有源桥变换器 扩展移相控制 KKT条件 动态矩阵控制 回流功率 

分 类 号：TM561[电气工程—电器]