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Section Voltage Calculation while a Loop Operation by Tie-Switch Close in a Distribution Management System
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 Title & Authors
Section Voltage Calculation while a Loop Operation by Tie-Switch Close in a Distribution Management System
Seo, Jeong-Soo; Lim, Il-Hyung; Park, Jong-Ho; Shin, Yonh-Hak; Choi, Myeon-Song;
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 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.
 Keywords
Load flow;Power flow;Phase difference;Distribution system;Loop;
 Language
Korean
 Cited by
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