The Following References may be of some help to ypu in deciding the K parameters.

The K constants are linearization constants. The 16 constants of the model depend on the system parameters and the operating condition.[2]

This model has 28 constants, presented below and, are functions of the system parameters [3]

1.   http://warse.org/pdfs/2014/icetetssp70.pdf

nternational Journal of Advanced Trends in Computer Science and Engineering

, Vol. 3 , No.1, Pages : 363 - 368 (2014)

Dual Damping Controller using Interline Power Flow Controller

M. Spandana,  K.Tirupathi Rao

2.  http://www.researchtrend.net/pdf/14%20ANUBHA%20@%20AMOL.pdf

Interline Power Flow Controller Based Damping Controllers for Damping Low

Frequency Oscillations

Anubha Prajapati and Kanchan Chaturvedi

International Journal of Electrical, Electronics and Computer Engineering

2(1):8 3 - 87 (2013)

3.   http://www.jatit.org/volumes/Vol47No2/58Vol47No2.pdf

SMALL SIGNAL ANALYSIS OF FLEXIBLE AC TRANSMISSION SYSTEM USING INTERLINE POWER FLOW CONTROLLER (IPFC)

CH. VENKATA KRISHNA REDDY, K.KRISHNA VENI,G.TULASIRAM DAS,SIRAJ

Journal of Theoretical and Applied Information Technology 20th January 2013. Vol. 47 No.2© 2005 - 2013 JATIT & LLS. All rights reserved

P.S.