Symmetrical Bipolar Output Isolated Four-Port Converters Based on Center-Tapped Winding for Bipolar DC Bus Applications

Using a multiport converter to integrate renewable energy and storage into the bipolar dc bus is desirable solution due its high efficiency reliability. In this article, series of output active rectifiers with center-tapped winding proposed serve as secondary rectification circuits. Then, family isolated four-port converters symmetrical outputs further developed storage. The can achieve single-stage power conversion, voltage, soft switching, decoupled control. A typical converter, named full-bridge interleaving bidirectional buck/boost + semiactive rectifier specifically analyzed in detail terms operation principles, voltage relationship, port current ripples, switching performance, Finally, experimental tests have been performed verify feasibility effectiveness topology.