| Title |
Line Voltage Regulation of Urban Transit Systems Using Supercapacitors |
| Authors |
Kyoung-Min Son ; Jaeho Choi ; Hyung-Chul Kim |
| Keywords |
Line voltage regulation; Supercapacitor; Bi-directional DC-DC converter; Energy storage system |
| Abstract |
This paper presents a novel series connected DC/DC converter and a proper variable phase shift switching method in order to obtain high voltage ratio for fuel cell system. The proposed series connected DC/DC converter has same rectifier and LC filter for DC output voltage, so it can reduce the number of passive devices regardless of the converter number. In the conventional constant phase shift switching method, the proposed series connected DC converters have inverse bias output voltage. In order to overcome this problem, a simple but proper variable phase shift switching method is proposed in the a novel series connected DC/DC converter. In order to verify the proposed system, simulation and experiments are implemented. |