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

The Korean Institute of Power Electronics (전력전자학회)
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A Seamless and Autonomous Mode Transfer Method of Grid-connected Inverter in Microgrid

마이크로그리드에서 계통연계 인버터의 자율적이며 끊김없는 모드전환 기법

  • Park, Sung-Youl (Dept. of Electrical & Information Eng., Seoul Nat'l Univ. of Science and Technology) ;
  • Kwon, Min-Ho (Korea Electrotechnology Research Institute (KERI)) ;
  • Choi, Se-Wan (Dept. of Electrical & Information Eng., Seoul Nat'l Univ. of Science and Technology)
  • Received : 2019.03.17
  • Accepted : 2019.04.25
  • Published : 2019.10.20
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Abstract

A grid-connected inverter with critical loads should be able to supply a stable voltage to critical loads at mode change and during clearing time while detecting unintentional islanding. This study proposes a mode transfer method for a grid-connected inverter with critical loads. The proposed method, which integrates the grid-connected and islanded mode control loops into one control block, provides an autonomous and seamless mode transfer from the current control to the voltage control. Therefore, the proposed scheme can supply a stable voltage to critical loads at mode change and during clearing time. Experimental results are provided to validate the proposed method.

Keywords

Acknowledgement

Supported by : 한국연구재단

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