Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2008.07a
- /
- Pages.484-485
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- 2008
The Over-current relay considering operating conditions of the micro-grid
마이크로그리드의 운전조건을 고려한 과전류계전기
-
Kang, Yong-Cheol
(Chonbuk National University)
;
- Kang, Hae-Gweon (Chonbuk National University) ;
- Cha, Sun-Hee (Chonbuk National University) ;
- Jang, Sung-Il (Chonbuk National University) ;
-
Lee, Byung-Eun
(Chonbuk National University)
;
- Kim, Yong-Gyun (HanKook IED Eng) ;
- Park, Goon-Cherl (Seoul National University)
- Published : 2008.07.16
Abstract
A micro-grid (MG) is a new concept to aggregate distributed generations (DGs) and loads in a small area. The difference between MG and DG is that MG can supply power to loads even in islanding conditions. The magnitude of the fault current depending on interconnection between the MG and utility and the number of DGs in the MG. Therefore, the setting value of the OCR must be changed depending on operating conditions of the MG. This paper proposes the over-current relay considering operating conditions of the MG. In the proposed algorithm, the supervisory control and data acquisition decides the operating conditions of the MG and sends the proper setting values to each OCR. The performance of the algorithm was investigated in the case of the various operating conditions.
Keywords