Unfortunately, as the manual states, the user-defined constraints included by MATPOWER are only linear. If you want to include additional non-linear constraints, you will need to get into the details of the OPF implementation and modify the files that compute the constraints and their derivatives. It is a non-trivial task. At a minimum, you will need to do the following ...
1. add a new set of nonlinear constraints in opf_setup.m around line 243. 2. add the implementation of the constraints and corresponding gradients to opf_consfcn.m 3. modify the hessian accordingly in opf_hessfcn.m If you do end up doing this, I'd love to see the result. It would be nice to make this process as easy as possible so your experience would be helpful. -- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Feb 16, 2012, at 2:09 AM, 델카스틸로 wrote: > Prof. Ray Zimmerman > Senior Research Associate > 419A Warren Hall, Cornell University, Ithaca, NY 14853 > Dear Prof. Zimmerman: > > My name is Manuelito Y. Del Castillo, Jr., a master's degree student in Seoul > National University of Science and Technology. I am currently working in my > reseacch for optimal power flow considering fault current constraints. > > I am aware that MATPOWER is the best tool I can use for my research. I am > currently studying on how to use MATPOWER through reading the user's manual > and your related published papers. Base on my reading, my research will be > specifically utilizing the extended OPF formulation. Thus, I will include the > fault current constraints under the option "user-defined constraints" which > is equation number 5.25 at page 31 of the MATPOWER 4.1 User's Manual. As per > section 5.3.2 of the manual, it states that "The user-defined constraints > (5.25) are general linear restrictions.." My concern now is that the fault > current constraints I am hoping to add to the OPF are non-linear equations. > > I am requesting your guide and help sir on how to deal with this matter. I > look forward for your favorable response. Thank you very much for your time. > It would be an utmost honor and pleasure to have a discussion with you sir. > > > Respectfully Yours, > > Manuelito Y. Del Castillo, Jr. > Seoul National University of Science and Technology >
