디지털 역결상 보호 계전기의 설계 및 제작 = Design and Fabrication of a Digital Protection Relay for Reverse-Open Phase

다국어 초록 (Multilingual Abstract)

Induction motors connected with a three-phase AC system may malfunction due to reverse phase or open phase faults. Conventional overcurrent relays and overheating relays are used to prevent such accidents; however, their drawbacks include a low response speed and false operation. Therefore, in this study, a digital relay for the reverse-open phase was designed and fabricated. This relay can detect the reverse phase and open phase faults and send a trigger signal to the control circuit. The proposed relay was developed based on a microcontroller. The detection times of the reverse phase and open phase were verified as 320ms and 80ms, respectively. Compared with conventional relays that only protect the motor from one type of fault, the proposed relay can detect both, reverse phase and open phase faults. In addition, the fault detection, identification criterion, and trigger signal patterns can be modified by programming according to the requirements of users.

참고문헌 (Reference)

1 C. W. Park, 756-, 2011

2 김우현, "옥내 배선계통에서 직렬 아크의 검출과 판별" 한국전기전자재료학회 31 (31): 412-416, 2018

3 박병철, "디지털 신호 처리 기반 저압 차단기용 전자식 계전기 개발" 한국조명.전기설비학회 27 (27): 81-88, 2013

4 A.J.B. Agra, "Parametrization of Intelligent Relays SRW01 and Identification of Occurrence of Possible Failures in Actuation and Shutdown Operations of Electric Low-voltage Three-phase Induction Motors" Institute of Electrical and Electronics Engineers (IEEE) 14 (14): 4076-4081, 2016

5 "Electric Power Statistics Information System (EPSIS)"

6 최신형, "3상 전동기 결상에 의한 전기화재 보호를 위한 장치 개발 연구" 한국화재소방학회 26 (26): 61-67, 2012

7 신헤영, "3상 전동기 결상시 무정전 전원공급장치에 대한 연구" 대한전기학회 63 (63): 1317-1320, 2014