The gencost matrix expects the coefficients for the total cost function, not
the marginal cost. So I think his gencost parameters are correct.
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Mar 3, 2010, at 9:56 AM, Thomas Trötscher wrote:
If you look at equation (1) it states that the cost function (not the marginal
cost) of the generators is given by:
C(P) = a + b*P + c*P^2
Thus the marginal cost function (which enters the objective function as
parameters in the f and H matrix) is:
Mc = b + 2*c*P
Therefore I assume that you have to double all the values in column 5 of the
gencost matrix to get correct results:
gencost = [
2 0 0 3 0.008 10 0;
2 0 0 3 0.012 15 0;
2 0 0 3 0.016 50 0;
2 0 0 3 0.01 12 0;
2 0 0 3 0.012 15.5 0;
2 0 0 3 0.014 15.5 0;
2 0 0 3 0.016 21.5 0;
2 0 0 3 0.012 16 0;
2 0 0 3 0.01 14 0;
2 0 0 3 0.008 13 0;
2 0 0 3 0.012 16 0;
2 0 0 3 0.018 31 0;
];
I haven’t tried it, but I will assume it works. Look at the lambdas after
simulating. It should also be safe to set all loads in the Pd column of the bus
matrix.
From:
[email protected]<mailto:[email protected]>
[mailto:[email protected]] On Behalf Of xiwen wang
Sent: 3. mars 2010 01:05
To: MATPOWER discussion forum; [email protected]<mailto:[email protected]>
Subject: simple AC OPF problem
Dear Ray,
Thanks very much for the wonderful tool.
I am repeating the 11-bus case as in the attached paper, but I can not get the
results for the base case (table 2 and 3).
Also attached the mat case file. Please let me know what I have done wrong.
If anyone happened done this before, please share the case file with me.
I really appreciate your help.
Cheers,
X
