This paper aims to use Static Synchronous Compensators (STATCOMs) in two
cases combined or distributed, where it act in the first case as one compensator at
one placement of electrical network, for the same required power of studied network,
and d
istributed compensators as multi-STACOM with suitable powers in the second
case where they are connected at the best placements of studied network, for
improving critical clearing time of IEEE-9 nodes test system and its transient
stability.