Power electronic equipment for increasing capability of transmission links in interconnected power systems

Power Electronic Equipment (FACTS) have been developed and used as economic and efficient means for solving problems arising in full utilization of the capacity of long, heavily loaded interconnected AC transmission systems and in scheduled transferring power between subsystems. Focused on improving the system stability and enhancing the transfer capability of interconnected systems with long transmission links, various FACTS devices, such as HVDC, SVC, TCSC and STATCON as well as UPFC are described in this paper. Based on a simple interconnected system with long transmission links, the effects of different FACTS devices: HVDC, SVC and TCSC are as example demonstrated at transient conditions. Copyright (C) 1998 IFAC.