Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Design and Test of ESS DC-DC Converter using Zinc-Bromine Redox Flow Battery for Stand-alone Microgrid
Authors Jung-Muk Choe ; Sun-Gil Ra ; Dong-Hwa Han ; Yong-Jin Lee ; Gyu-Ha Choe
DOI 10.6113/TKPE/2014.19.2.106
Page pp.106-115
ISSN 1229-2214
Keywords redox flow battery; RFB; stand-alone microgrid; battery; energy storage system
Abstract This paper proposes ESS DC-DC Converter using Redox Flow Battery (RFB) for stand-alone microgrid. Price, safety, expandability and dynamics are crucial in ESS. Reports show that Zinc-bromine (ZnBr) RFB is the best choice in ESS. Simple electrical ZnBr RFB model is obtained from charging test. DC-DC converter Inductor current-DClink Voltage model is proposed for the DC microgrid. For the controller design in z-domain, the K-factor method is by considering nature of the digital controller. The control performance has been verified with simulation and hardware experiments. Lastly 10kW DC microgrid using RFB test result is shown.