This paper analyzes a Dual Active Bridge seriesresonant DC-DC converter for solar photovoltaic DC microgrid. These converters are particularly attracted for renewable energy applications due to high switching frequency with low switching losses. The analysis is composed of the equivalent circuit using Fourier series. Besides, the steady-state response is shown where the current flow depends only on the phase shift modulation. MPPT algorithm is designed and discussed. Finally, the simulations results using the PSIM software for a 500 W prototype are shown. © 2019 IEEE.

The design of a Single-Stage Three Port AC-DC converter is analyzed in this article. The structure analyzed is the Triple Active Bridge (TAB) single phase AC-DC converter which can be used for charging of Plug in Hybrid Electric Vehicles or to control the power flow in a micro-grid composed by a renewable source, a battery pack and the single phase grid. The analysis of the converter is focused in the modulation and the high frequency (HF) transformer sizing. The three winding transformer allows safety and voltage matching between the three sources. The sources are connected to the HF transformer with three active bridges which are modulated with a fixed frequency. To compensate the time-variant AC grid voltage in the HF transformer, the grid voltage is modulated with a 50% duty ratio and, the renewable DC source and the battery are modulated with a low frequency sinusoidal time-variant ...

This work was financed by CONCYTEC-FONDECYT within the call for projects E041-01 [Contract Number 176-2018-BM-FT].