Dear all I am trying to run my own opf program using ABC algorithm. My program for the basic quadratic cost function aP^2+bp+c is running. Now i would like to add the valve point loading effect. I got a paper titled Optimal-power-flow-using-gravitational-search-algorithm for an IEEE 30 bus system (see table A3 in paper). I would like to know the coefficients for an IEEE57 bus system. Does any one have a paper or the coefficients.
Thank you khirad Link for the paper http://akademikpersonel.kocaeli.edu.tr/nurcan/sci/nurcan03.04.2012_18.57.09sci.pdf -- Friendship is like a red rose with a green stem
