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Modern power system transmission networks are becoming with increasing complexity due to growing demand. Losing stability is one of the major problems of such modern power system following a disturbance. Transient stability control plays a vital role in ensuring the stabile operation of power system during the fault. FACTS technologies is an effective tool for better controllability and increase transfer capability. The main objective is the comparative performance analysis of STATCOM, SVC and UPFC for improve the transient stability of multi machine system so a simple SIMULINK is considered for this purpose.

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