An Isolated Boost-Three Level Bi-directional DC-DC Converter with Phase Shift PWM

A. M. SOOMRO, A. A. SYED, A. N. KHIZER, S. F. KHAHRO, K. TABBASSUM

Abstract


A  novel  bi-directional  DC-DC converter  applicable  to  micro-grid  is  proposed  in this paper,  which  combines  traditional boost-type converter and three-level converter. Excellent power transmission ability (including voltage step-up and step down) can be obtained by deploying phase-shift control strategy. The proposed converter with three-level topology is also capable to lower the voltage stress of the second stage switches to 50%. Operation modes have been analyzed in detailin the paper. A 3-kW laboratory prototype was designed and tested for performance evaluation. Experimental results indicate the effectiveness and stability of the system.

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