1. If you have a specific MATPOWER question, I'll be happy to answer it, but I can't implement it for you you. My suggestion was to use MATPOWER's OPF as a subroutine for your own simple single variable greedy search optimization.
2. MATPOWER's OPF always treats generator reactive power injection as an optimization variable (constrained by QMIN, QMAX and possibly a trapezoidal capability curve, see Section 5.4.3 in the manual). If you a case *without* reactive power control, I suppose you could set QMIN equal to QMAX or something. 3. You will see evidence of Qg being included in the optimization variable x in most of the OPF related files (Tables D-8, D-9). Have a look at opf_setup.m, mipsopf_solver.m, opf_costfcn.m, opf_consfcn.m, for starters. -- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Feb 6, 2012, at 4:49 PM, Carlos Gonzalez Almeida wrote: > Dear Prof. Zimmerman, > > Thank you for help. > > 1. I care a single tap ratio for the slack bus only. Could you please help me > to implement it in MATPOWER? > > 2. My mean about "Phi", is : Power Factor = Cos (Phi). I need PF as > optimization variable in order to compare the results with and without > reactive power control. If you have another solution for this, please let me > know. > > 3. Could you please let me know in what .m file you have considered reactive > power as optimization variable? what is the name of the m file in MATPOWER? > > Best Wishes > > C. G. Almeida > > > > > On Mon, Feb 6, 2012 at 22:02, Ray Zimmerman <[email protected]> wrote: > Unfortunately, including a transformer tap ratio as an optimization variable > is not possible without major modifications. I would like to add this some > day, but no promises. If anyone has any good references on this that would be > appreciated. > > If it is a single tap ratio that you care about, it might be possible to use > some brute force greedy search that simply calls runopf iteratively while > adjusting the tap ratio in search of an improved solution. > > Regarding reactive power as an optimization variable, I'm not sure about the > "Phi" you are referring to. However, all reactive power injections from > generators are already optimization variables (see Qg in equation (5.5) in > the manual). > > -- > Ray Zimmerman > Senior Research Associate > 419A Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > > > On Feb 6, 2012, at 5:24 AM, Carlos Gonzalez Almeida wrote: > >> Dear Dr. Zimmerman >> >> I want to use the tap of Transformer at slack bus as optimization variable >> in MATPOWER? How can I do this? >> >> Also, how can I add reactive power as variable of optimization. In other >> words, if I want to have "Phi" of cos Phi as optimization variable, how can >> I add this? >> >> Best Regards >> >> Carlos >> > >
