| Title |
Improvement of the Differential Current Relaying Method for Protecting the Transmission Line Equipped with UPFC |
| Authors |
Jung-Uk Lim ; Young-Jin Kwon ; Thordur RunolfssonThordur Runolfsson |
| Keywords |
Unified Power Flow Controller(UPFC) ; Transmission Line Protection ; Differential Current Relaying Method(DCRM) |
| Abstract |
The objective of this paper is to analyze power system dynamics influenced by UPFC(Unified Power Flow Controller) operation and to develop a refined DCRM(Differential Current Relaying Method) to protect the transmission line with UPFC effectively. The implementation of control strategies for UPFC introduces new power system dynamic problems that must be considered while applying the conventional DCRM. In this paper, impact of UPFC operation on the DCRM has been reviewed and a refined DCRM has been proposed to detect faults properly in spite of UPFC operation. The proposed method is verified by simulation on the line-faulted system with UPFC. |