Decentralized Control for a Multiactive Bridge Converter
Yang Qi, Xiong Liu, Weilin Li, Zhongzheng Zhou, Wenjie Liu, Kaushik Rajashekara
Abstract
Multiactive bridge (MAB) converter has played an important role in the power conversion of renewable-based smart grids, electrical vehicles, and more/all electrical aircraft. However, the increase in MAB submodules greatly complicates the control architecture. In this regard, the conventional centralized control strategies, which highly rely on the central controller, are limited by the computation burden and flexibility. To overcome this problem, this article proposes a decentralized control for MAB converters. The MAB submodules switching frequencies are adaptively regulated based on local information. Through this effort, flexible electrical power routing can be realized without the need for communications. The proposed control strategy not only relieves the computation burden of MAB control system, but also improves its modularity, flexibility, and expandability. Finally, hardware experimental results of a typical MAB converter are presented for verification.