%X This paper addresses the formulation of the nonlinear dynamic model of the power system installed with Interline Power Flow Controller (IPFC). The linearized model for both single-machine infinite-bus and multimachine power system installed with IPFC is developed and incorporated into the Phillips-Heffron model. These models lay the foundation for small signal stability studies of the power system using IPFC. The application of the models is demonstrated for a Multi-machine power system. ©2010 IEEE. %K Dynamic modeling; Interline power flow controllers; IPFC; Linearized models; Multi machine power system; Nonlinear dynamic models; Phillips-Heffron model; Power system modelling; Power systems; Single machine infinite bus; Small signal stability, Electric power systems; Flow control, Electric control equipment %R 10.1109/PECON.2010.5697649 %D 2010 %L scholars985 %J PECon2010 - 2010 IEEE International Conference on Power and Energy %O cited By 4; Conference of 2010 IEEE International Conference on Power and Energy, PECon2010 ; Conference Date: 29 November 2010 Through 1 December 2010; Conference Code:83860 %C Kuala Lumpur %A A.M. Parimi %A N.C. Sahoo %A I. Elamvazuthi %A N. Saad %T Dynamic modeling of interline power flow controller for small signal stability %P 583-588