The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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An Empirical Study on Autonomous Operation in Emergency Situation of Microgrids

마이크로그리드의 비상상황시 자율 대처 운전 방안에 관한 실증적 연구

  • Hong, Ji-Song (Dept. of Electrical Engineering, Chonnam National University) ;
  • Kim, Hyun-Woo (Dept. of Electrical Engineering, Chonnam National University) ;
  • Ahn, Seon-Ju (Dept. of Electrical Engineering, Chonnam National University) ;
  • Choi, Joon-Ho (Dept. of Electrical Engineering, Chonnam National University) ;
  • Yun, Sang-Yun (Dept. of Electrical Engineering, Chonnam National University)
  • Received : 2018.09.21
  • Accepted : 2018.11.15
  • Published : 2018.12.01
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Abstract

The biggest obstacle to the commercialization of small and medium size microgrid (MG) is the reliability and economics of MG operation and maintenance. In this paper, we propose an autonomous operation method that is implemented as an application program installed in the MG operating system in emergency situations. The proposed algorithm consists of four steps of distinction, recognition, determination and control of emergency situations that can occur in MG. A fuzzy-based situation decision algorithm has been proposed to eliminate the barriers of autonomous operation in actual emergency situation such as occurrence of bad data and communication delay. In addition, countermeasures have been suggested for cases where multiple emergency situations have occurred in combination. The proposed algorithm was tested in a 500kW actual microgrid site of a university. Through the test, the validity of the proposed method and its applicability to practical MG operation are verified.

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