You are correct. And MATPOWER's OPF solvers assume continuous cost functions.
-- Ray Zimmerman Senior Research Associate 211 Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Jun 13, 2011, at 11:53 AM, HOSSEIN SHARIFZADEH wrote: > Dear Dr Zimmerman > > Many thanks for your valuable help. > In the case of 2.A question, I guess something is misunderstood. In the > conventional piecewise linear costs, cost function are continuous and there > is no jumping from one point to another point in cost function. In other > words, in piecewise linear costs and in the boundary region, two piecewise > linear section connects to each other. But in the "Multi-fuel" generators, > theses points are far from each other and cost function is discrete. > > Thanks in advance > > Sincerely, Sharifzadeh
