摘要
为提升能量路由器中双有源桥(DAB)变换器的传输效率,同时改善系统的动态特性,该文提出一种基于扩展移相的输出电压模型预测控制与梯度下降算法实现回流功率优化的混合控制策略。首先,建立DAB变换器在单移相和扩展移相控制下的传输功率数学模型,分析回流功率产生机理,并推导扩展移相控制下的输出电压状态空间平均化方程;其次,在DAB变换器输出电压模型预测控制基础上提出基于梯度下降算法的回流功率优化策略。搭建小功率实验样机,并与传统单移相控制进行对比,实验结果证明了该文所提控制策略的有效性及正确性。
For improving the transmission efficiency and dynamic characteristics of dualactive-bridge(DAB)converter,a hybrid control strategy for backflow power optimization is proposed based on extended-phase-shift output voltage model predictive control and gradient descent algorithm.Firstly,the transmission power mathematical models of DAB converter under single-phase-shift and extended-phase-shift control are established.The mechanism of backflow power is analyzed,and the output voltage state space averaging equation under extended-phase-shift control is also derived.Secondly,based on the output voltage model predictive control of DAB converter,a backflow power optimization strategy based on gradient descent algorithm is proposed.A scale-down experimental prototype of DAB converter was built and compared with the traditional single-phase-shift control.The experimental results have verified the effectiveness and correctness of the proposed control strategy.
作者
周兵凯
杨晓峰
张智
李泽杰
郑琼林
Pavel Kobrle
Zhou Bingkai;Yang Xiaofeng;Zhang Zhi;Li Zejie;Zheng Trillion Q;Pavel Kobrle(School of Electrical Engineering Beijing Jiaotong University,Beijing 100044,China;Faculty of Electrical Engineering Czech Technical University in Prague Prague 16627,Czech Republic)
出处
《电工技术学报》
EI
CSCD
北大核心
2020年第14期3030-3040,共11页
Transactions of China Electrotechnical Society
基金
国家重点研发计划(2016YFE0131700)
捷克共和国青年和体育英才计划(LTACH-17001)资助项目。
关键词
双有源桥变换器
扩展移相控制
回流功率优化
动态响应
梯度下降算法
Dual-active-bridge converter
extended-phase-shift control
backflow power optimization
dynamic response
gradient descent algorithm
