A New Multiport DC-DC Converter for DC Microgrid Applications
Ahmed Amr Saafan, Vinod Khadkikar, Mohamed Shawky El Moursi, Hatem Zeineldin
Abstract
In this paper, a new multiport DC-DC converter is proposed for DC Microgrid applications. The bidirectional buck- boost structure of the proposed topology allows an enhanced flexibility to connect sources and loads with different voltage and power levels. The control strategy is developed to achieve power control for renewable sources such as PV, in addition to a certain degree of resilience for DC sources availability maintaining boosted DC link voltage. A detailed steady state analysis is conducted to derive voltage relations between all ports. The proposed configuration has several benefits for the design and operation of DC microgrids such as reducing multiple power conversions, reduced number of elements, voltage boosting capability, and higher efficiency. A MATLAB/Simulink based simulation study is conducted to demonstrate the performance of proposed multiport converter topology under different operating conditions.