| Title |
A Study on the Fault Tolerance and High Efficiency Control of 4 Leg DC/DC Converter for Battery Energy Storage System in Standalone DC Micro-grid |
| Authors |
최정식(Jung-Sik Choi) ; 오승열(Seung-Yeol Oh) ; 차대석(Dae-Seak Cha) ; 정동화(Dong-Hwa Chung) |
| DOI |
http://doi.org/10.5370/KIEE.2018.67.9.1239 |
| Keywords |
DC microgrid ; BESS ; Bidirectional DC/DC Converter ; Fault tolerance ; High efficiency |
| Abstract |
This paper proposes a fault tolerant and high efficiency operation algorithm for a 4 LEG DC/DC converter for a battery energy storage system(BESS) forming a main power source in a standalone DC micro grid. The BESS for the main power supply in the stand-alone DC micro-grid is required to operate at high speed according to fault tolerant control and load by operating at all times. Fault-tolerance control changes the short-circuit fault to an open-circuit fault by using a fuse in case of leg fault in 4 legs, and operates stably through phase shift control. In addition, considering the loss of the power semiconductor, the number of LEG operation is adjusted to operate at high efficiency in the full load region. In this paper, fault tolerant control and high efficiency operation algorithm of DC/DC converter for BESS in standalone DC micro grid is presented and it is proved through simulation and experiment. |