Conversor Interlink Multiportas: conversor flyback multidirecional multi-enrolamentos

Abstract

This work aims to present a new topology of a multiport converter DC-DC. Entitled as multi-winding multidirectional Flyback converter of n port (inputs/outputs) operating as an interface between photovoltaic system, DC load, battery energy storage system, wind system, electric vehicle (EV) and utility grid. Therefore, there are several possibilities to connect, once it can group up to n systems, different or not, in the proposed topology. This interface is known as an Interlink Multi-Port Converter (IMPC), which supply power in any direction and centralized control of the flow between the converter ports. Furthermore, it is possible to connect the systems directly to the IMPC, as a consequence, ensuring that the sources are not connected to the same bus, as well as, reducing the need for additional DC-DC converters and the systems can operate at different rated voltages and current. Due to its multidirectional functioning, a port can be responsible for supplying or receiving energy, demanding, however, the observance of the duty-cycle control when providing it or the phase-shift control when collecting energy. Thus, control strategies are elaborated using techniques, such as selective control, uncoupling the operation modes of the IMPC converter (supplying/receiving energy) through the hybrid predictive current controller. At last, the simulations are implemented in the PSIM® software, in order to evaluate the robustness of the control and validate the performance of the IMPC in managing the power flow between the ports.