Effect of STATCOM placement on performance of voltage sag mitigation

Voltage sag is considered as one of the most common power quality problems. It may cause sensitive equipment to malfunction and process interruption. This paper investigates the effect of placement of STATCOM to mitigate voltage sags in power system network. The simulation results show that it is effective to place one STATCOM in low voltage network and other in high voltage network instead of placing both the STATCOM in the same network. Also an ability of the STATCOM to mitigate the voltage sags due to symmetrical as well as unsymmetrical faults has been investigated. The developed algorithm has been applied to the IEEE 24 bus Reliability Test System (RTS).