직류배전을 위한 넓은 전압범위를 가지는 100㎾급 에너지저장장치의 고효율화 방안연구

This paper describes a 100 kW high-efficiency isolated DC–DC converter for DC distribution system. The DC–DC converter consists of two dual-active-bridge (DAB) converters in parallel. The operating principle of the DAB converter is explained, and the algorithm for parallel operation of the DAB converters is proposed. Simulation and experiments are conducted to verify the performance of the proposed system. Experimental results demonstrate that the developed converter excellently marks 97.4 percent of peak efficiency under its normal operating condition.