The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Improved Conditional Integrator Anti-Windup Method for Seamless Transfer of Bidirectional DC-DC Converter in Grid-Connected Battery Energy Storage System

계통연계형 배터리 에너지저장장치용 양방향 DC-DC 컨버터의 무순단 절체를 위한 조건부 적분 안티-와인드업 연구

  • Eom, Jun-Yong (School of Electrical Engineering, University of Ulsan) ;
  • Choi, Sung-Jin (School of Electrical Engineering, University of Ulsan) ;
  • Lee, Hong-Hee (School of Electrical Engineering, University of Ulsan)
  • Received : 2020.03.30
  • Accepted : 2020.04.23
  • Published : 2020.10.20
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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.

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References

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