Dear Matpower community, I have a question regarding capability curves of generators. It was mentioned here and in the Manual that capability curve has a trapezoidal shape. In my case I'd like to modify the curve to be triangular. Therefore, the six points I've specified in mpc.gen are:
mpc.gen(:,11) = 0; % pc1 mpc.gen(:,12) = mpc.gen(:,9)*cos(0.85); % pc2 mpc.gen(:,13) = 0; % min q at pc1 mpc.gen(:,14) = 0; % max q at pc1 mpc.gen(:,15) = mpc.gen(:,5); % min q at pc2 mpc.gen(:,16) = mpc.gen(:,4); % max q at pc2 But when I check results of OPF I see that reactive power output of some generators is outside of these limits of capability curves. Could you tell me if such 'triangular' formulation of capability curve is handled correctly by OPF? Or only trapezoidal shapes are allowed? Unfortunately, I cannot understand why OPF converges with such constraints violation.... My system has additional gen buses which play a role of unlimited compensators, so in case of violation of generator's capability curve limits, reactive power should be supplied from compensators (I suppose). Costs of reactive power for generators and compensators are equal. The mpc file is attached. I'm looking forward to your reply and would appreciate any help! Best regards, Irina Boiarchuk
mpc123.mat
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