| Title |
Improved Conditional Integrator Anti-Windup Method for Seamless Transfer of Bidirectional DC-DC Converter in Grid-Connected Battery Energy Storage System |
| Authors |
Jun-Yong Eom ; Sung-Jin Choi ; Hong-Hee Lee |
| DOI |
10.6113/TKPE.2020.25.5.342 |
| Keywords |
Seamless transfer; Mode transition; Anti-windup; Bi-directional converter; DC microgrid system |
| Abstract |
Power exchanges between the grid and the battery through a bidirectional DC-DC converter are essential for DC microgrid systems. In general, the battery is charged when the grid is connected, and the system is powered by the battery when the grid is disconnected. In this mode transition, the saturation of the voltage controller slows down output response and produces large transient errors in DC link voltage. To solve this problem, a novel anti-windup design is proposed to improve anti-windup performance further. The proposed method stabilizes DC bus voltage through a wider range of battery voltage with faster transition compared with that of conventional methods. The proposed method is verified through an experimental setup composed of a 125 W laboratory-scale DC microgrid system. |