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

The Korean Institute of Power Electronics (전력전자학회)
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Control Technique of Triple-Active-Bridge Converter and Its Effective Controller Design Based on Small Signal Model for Islanding Mode Operation

단독운전 모드 동작에서의 Triple-Active-Bridge 컨버터 제어 기법 및 소신호 모델을 기반으로 한 제어기 설계

  • Jeon, Chano (School of Electrical & Computer Engineering, UNIST) ;
  • Heo, Kyoung-Wook (School of Electrical & Computer Engineering, UNIST) ;
  • Ryu, Myung-Hyo (Power Conversion & Control Research Center, KERI) ;
  • Jung, Jee-Hoon (School of Electrical & Computer Engineering, UNIST)
  • Received : 2021.10.12
  • Accepted : 2021.11.25
  • Published : 2022.06.20
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Abstract

In DC distribution systems, a TAB converter employing multiple transformers is one of the most widely used topologies due to its high power density, modularizability, and cost-effectiveness. However, the conventional control technique for a grid-connected mode in the TAB converter cannot maintain its reliability for an islanding mode under a blackout situation. In this paper, the islanding mode control technique is proposed to solve this issue. To verify the relative stability and dynamic characteristics of the control technique, small-signal models of both the grid connected and the islanding mode are derived. Based on the small-signal models, PI controllers are designed to provide suitable power control. The proposed control technique, the accuracy of small-signal models, and the performance of the controllers are verified by simulations and experiments with a 1-kW prototype TAB converter.

Keywords

Acknowledgement

본 연구는 산업통상자원부(MOTIE)와 한국에너지기술평가원(KETEP)의 지원을 받아 수행한 연구과제입니다. (No. 2019381010001A) 이 논문은 2021년도 4단계 두뇌한국21 사업(4단계 BK21 사업)에 의하여 지원되었음.

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