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논문 기본 정보

자료유형
학술저널
저자정보
박양권 (Korea University of Technology and Education) 이후동 (Korea University of Technology and Education) 태동현 (Korea University of Technology and Education) 노대석 (Korea University of Technology and Education)
저널정보
대한전기학회 전기학회논문지 전기학회논문지 제69권 제7호
발행연도
2020.7
수록면
1,001 - 1,009 (9page)
DOI
10.5370/KIEE.2020.69.7.1001

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이 논문의 연구 히스토리 (5)

초록· 키워드

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In distribution system with PV system, malfunction cases of the DOCGR have been reported by an misuse of RCA(reference characteristics angle) and OPA(operation angle) at installation of CT and caused the problems including interruption and unstable power supply. Accordingly, practical countermeasures to prevent a malfunction of DOCGR in the field are being required. Therefore, this paper presents a malfunction mechanism of DOCGR in distribution system with PV system and proposes of prevention algorithm for malfunction of DOCGR to be operated only in case of SLG(single line-to-ground) fault at PV system side. Furthermore, in order to perform a demonstration of malfunction in DOCGR, this paper presents a modeling of test devices for DOCGR which is composed of power sources, protection devices and PV system based on PSCAD/EMTDC S/W, and also implements a 2.5kW scaled test devices for characteristics of DOCGR. From the simulation and test results of malfunction characteristics of DOCGR based on the proposed modeling and test devices, it is confirmed that the malfunction of DOCGR has been occurred in case of SLG faults at both power source and PV system side if direction of CT is installed to reverse(L-K). In addition, it is found that the proposed algorithm is practical and useful tools to prevent malfunction of DOCGR without modification of wiring and position of CT when the DOCGR is operated by changing the proper setting values of RCA and OPA. And also, it can contribute to user education for preventing malfunction of DOCGR in real distribution system.

목차

Abstract
1. 서론
2. 태양광전원용 DOCGR의 오동작 메커니즘 및 방지 알고리즘
3. PSCAD/EMTDC에 의한 DOCGR의 특성분석 모델링
4. DOCGR의 특성시험장치 구현
5. 시뮬레이션 결과 및 분석
6. 결론
References

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UCI(KEPA) : I410-ECN-0101-2020-560-000860509