Thank you for your prompt response By the form of these values i had the idea of that were these coefficients that you confirms to me. The first four values, do you know that they represent? Again thank you very much, I hope not to importune. Att: Angie JoaquiUniversidad del ValleCali - Colombia From: abhy...@mcs.anl.gov To: matpowe...@list.cornell.edu Subject: Re: OPF: Objetive Function - Cost Model Date: Thu, 27 Feb 2014 23:15:04 +0000
On Feb 27, 2014, at 4:40 PM, Angie Joaqui Rendon wrote: Regards I'm working with tho OPF in MATPOWER, and i wanted to know which is the model of costs that the program uses. I need the information to be able to compare results with other simulators, because of it I must have very well definite each datum of the information to using. 1. Looking at the information of the system of 9 Nodes; I find the following information of costs for the system: %% generator cost data % 1 startup shutdown n x1 y1 ... xn yn % 2 startup shutdown n c(n-1) ... c0 mpc.gencost = [ 2 1500 0 3 0.11 5 150; 2 2000 0 3 0.085 1.2 600; 2 3000 0 3 0.1225 1 335; ]; What kind of cost model this information refers? MATPOWER supports two types of cost functions: (a) Piecewise linear and (b) Polynomial. See the manual page on Generator cost data format to see how to specify the data for the two cost functions. For the above 9-bus case, the cost function is quadratic of the form c0 + c1*P + c2*P^2 where c0, c1, and c2 are the coefficients in the last, second last, and third last columns of gencost data. 2. In the page says that by default the objective function of the system is the minimization of costs, this objective function can be changed for others, e.g. minimize losses MVAR? http://www.pserc.cornell.edu//matpower/#faq Shri I appreciate the information you can give me.
