| Title |
Section Voltage Calculation while a Loop Operation by Tie-Switch Close in a Distribution Management System |
| Authors |
서정수(Seo, Jeong-Soo) ; 임일형(Lim, Il-Hyung) ; 박종호(Park, Jong-Ho) ; 신용학(Shin, Yonh-Hak) ; 최면송(Choi, Myeon-Song) |
| DOI |
https://doi.org/10.5370/KIEE.2016.65.3.397 |
| Keywords |
Load flow ; Power flow ; Phase difference ; Distribution system ; Loop |
| Abstract |
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. |