This article proposes a new controller for power regulation in dual active bridge (DAB) dc–dc converter based on a new scheme that tracks minimum RMS current to ensure minimum losses. The proposed controller is based on an implementation of perturb and observe (P&O) tracking method that enables minimum current point tracking (MCPT) at any desired level of active power transfer and dc voltage ratio. The P&O is embedded in a closed-loop control scheme which simultaneously regulates active power in DAB converter. The nonlinear $I$ – $V$ characteristic of DAB presents the basis for this proposed controller and the rationale of using P&O algorithm. The proposed controller does not require complex nonlinear converter modeling and is not circuit parameter dependent. Design procedure of the proposed controller is presented, and extensive simulation is carried out using MATLAB/Simulink to validate the effectiveness of the proposed MCPT closed-loop controller. An experimental prototype also substantiates the results achieved.

中文翻译：

---

具有最小电流点跟踪技术的双有源桥式DC-DC转换器中的新型有源功率控制器

本文基于一种跟踪最小RMS电流以确保最小损耗的新方案，提出了一种用于双有源桥（DAB）dc-dc转换器中的功率调节的新型控制器。所提出的控制器基于扰动和观察（P＆O）跟踪方法的实现，该方法可在任何所需水平的有功功率传输和直流电压比下实现最小电流点跟踪（MCPT）。P＆O嵌入在闭环控制方案中，该方案可同时调节DAB转换器中的有功功率。非线性 $ I $ – $ V $ DAB的特性提供了该控制器的基础以及使用P＆O算法的原理。所提出的控制器不需要复杂的非线性转换器建模，并且与电路参数无关。给出了所提出控制器的设计程序，并使用MATLAB / Simulink进行了广泛的仿真，以验证所提出的MCPT闭环控制器的有效性。实验原型也证实了所获得的结果。