摘要
针对双有源桥DC-DC变换器在电压不匹配时会产生较大的电流应力,导致变换器效率降低的问题,提出1种结合双重内移相与交错双重移相的组合双重移相控制策略。首先,分析2种控制策略工作原理,建立传输功率和电流应力的数学模型;然后,以最小电流应力为优化目标,利用Karush-Kuhn-Tucker条件下的拉格朗日乘子法求解最优移相比;其次,根据电压比和传输功率对2种控制策略下的优化方法进行组合,利用组合双重移相控制获得全局电流应力最优解,并与现有的单移相和双重移相控制进行比较,得出所提控制策略能够在电压比较大的情况下进一步降低电流应力与回流功率,提高传输效率;最后,搭建实验样机验证该控制策略可行性。
To address the issue that a dual-active-bridge DC-DC converter will produce large current stress when voltages mismatch and result in a large reduction of its efficiency,a combined dual-phase-shifting(CDPS)control strategy is proposed,which combines dual-internal-phase-shifting(DIPS)and interlaced-dual-phase-shifting(IDPS).First,the working principles of the two control strategies are analyzed,and the mathematical models of transmission power and current stress are established.Second,with the minimum current stress as the objective,the optimal phase-shifting ratios are solved by using the Lagrange multiplied method under the Karush-Kuhn-Tucker condition.Third,the optimization methods under the two control strategies are combined according to different voltage ratios and transmission power.The CDPS control is used to obtain the optimal solution of current stress,which is compared with those obtained under the existing single-phase-shifting and dualphase-shifting control strategies.Results show that the proposed control strategy can further reduce the current stress and reactive power under the condition of high voltage ratios and improve the efficiency.Finally,an experimental prototype was built to verify the feasibility of the proposed control strategy.
作者
余伟臣
高明
干方宇
石健将
YU Weichen;GAO Ming;GAN Fangyu;SHI Jianjiang(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)
出处
《电源学报》
北大核心
2025年第2期21-30,共10页
Journal of Power Supply
基金
国家自然科学基金资助项目(52077199)。
关键词
双有源桥
双重移相
电压比
电流应力
优化控制
Dual-active-bridge
dual-phase-shifting
voltage ratio
current stress
optimal control
作者简介
余伟臣(1995-),男,硕士研究生。研究方向:双向DC-DC变换器的优化控制。E-mail:21910042@zju.edu.cn;高明(1992-),男,博士研究生。研究方向:太阳能无人机能量管理系统。E-mail:11810059@zju.edu.cn;干方宇(1997-),男,硕士研究生。研究方向:高功率密度LLC谐振变换器。E-mail:21910110@zju.edu.cn;通信作者:石健将(1969-),男,博士,教授。研究方向:高效能电能变换器及其先进数字控制技术、智能固态变压器及微网技术。E-mail:jianjiang@zju.edu.cn。
