IMPROVING TRANSIENT STABILITY MARGIN BY USING DISTRIBUTED STATIC SERIES COMPENSATOR

Series-Flexible AC transmission controllers can be used to improve transient stability of power system but their high cost and lumped nature have restricted their use worldwide. Hence, distributed Flexible AC transmission system (D-FACTS) is introduced to overcome limitation of FACTS controller. In this work, effect of Distributed Static Series Compensator (DSSC) on power angle and response of DSSC during severe three phase fault condition is also studied by using two-machine system. It is found that DSSC is capable of maintaining adequate transient stability margin during severe faults.