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배전운영 시스템에서 상시개방 연계 스위치 투입에 의한 루프 운전 중 구간전압 계산 방법
서정수(Jeong-Soo Seo),임일형(Il-Hyung Lim),박종호(Jong-Ho Park),신용학(Yonh-Hak Shin),최면송(Myeon-Song Choi) 대한전기학회 2016 전기학회논문지 Vol.65 No.3
Generally, an electrical distribution configuration is a radial system with one-way current in a distribution management system (DMS). All feeders in a DMS have tie-switches to make radial system. Sometimes, DMS should change a tie-switch for operation. In that case, the tie-switch has to be closed first; then a switch is opened as another tie-switch in order to prevent blackout for customers. At the moment when the tie-switch is closed, distribution system is operated in a loop state, not radial. Before the loop operation, DMS operator has to check any expected events for stable distribution system operation; and the most important event is a mis-operation of a protection relay. In addition, DMS operator should check voltage profile violation but a calculation method of section voltages had not been used. Thus, this paper proposes a calculation method of section voltages at a loop operation in a DMS. The proposed calculation algorithm is verified by Matlap Simulink.