| Title |
A Study on Distance Relay Characteristics for Transmission Line with the Unified Power Flow Controller |
| Authors |
Jung-nam Suh ; Chang-Ho Jung ; Jin-O Kim |
| Abstract |
This paper represents impedance calculation of the distance relay using PSCAD/EMTDC software for transmission line involving the UPFC(Unified Power Flow Controller)device, which is the most vigorous component of FACTS. The presence of the UPFC significantly affects the line parameters of transmission system, which are also influenced by the distance relay setting. Moreover, depending on the UPFC location and its parameters, zones of setting the distance relay will be changed. The presence of the UPFC in the fault loop affects both voltage and current seen by relay. Therefore, the distance relay should be taken into account the variable injected voltage of the UPFC. |