Hybrid Full-Bridge Boost-Converter with Full ZCS for MVDC Grids

To realize the single-stage integration into medium-voltage de grids for renewable energy, a hybrid full-bridge boost module for input-parallel-output-series de-de converter is proposed. Except for a full bridge, the proposed module includes two blocking didoes and a resonant tank on the primary side, which can keep the current as zero and obtain reverse current, respectively. Along with the put forward novel control strategy, the zero current switching for all semiconductors is realized, including both the primary and secondary ones. The proposed module has been well verified by the simulation results.