Another question is this: when I have not fixed loads only I have dispatchable loads how can I define power factor for generators and loads separately?
Best Wishes Carlos On Thu, Mar 10, 2011 at 13:53, Carlos Gonzalez Almeida < [email protected]> wrote: > Dear Prof. Zimmerman > > Thanks a lot for your useful guidance. > > For example, in the attached file for a simple case study with 2 loads and > generators I want to have a power factor 0.95. I have problem with adjusting > power factor in MATPOWER. How can I do it in the attached file? Also I don't > know why I have voltage constraint 1.5 pu. I think because of these > constraints I have a little bit difference in the value of lambda > I have done runmarket with the following offers and bids. > Could you please tell me why? > > +++++++++++++++++++++ > mpc0 = loadcase('case4gs1'); > mpc = load2disp(mpc0); > mkt.OPF = 'AC'; > offers.P.qty = [100;70]; > offers.P.prc = [50;100]; > bids.P.qty = [50 ;70 ]; > bids.P.prc = [150 ;130 ]; > [r, co, cb] = runmarket(mpc, offers, bids, mkt); > co.P.qty > co.P.prc > cb.P.qty > cb.P.prc > ++++++++++++++++++++++++ > > Best Wishes > > C. Gonzalez Almeida > > > > On Wed, Mar 9, 2011 at 19:47, Ray Zimmerman <[email protected]> wrote: > >> Carlos, >> >> I'm not sure what you mean by "test the example ... regarding zero power >> factor". If you are going to change some of the existing dispatchable loads >> to have a zero power factor, then the existing market structure for the >> example, which includes only $/MW bids for active power, will not be >> applicable. So you need to decide how you want to handle these reactive-only >> loads. I suppose you'll need to specify reactive power bids for them. >> >> On your second question, the offers and bids are used to construct a >> gencost matrix with negative costs for the negative generators that >> represent dispatchable loads. The objective function is then to minimize >> this "cost" of generation, which is computed in opf_costfcn.m. You are >> correct that this is equivalent to maximizing social welfare. >> >> -- >> Ray Zimmerman >> Senior Research Associate >> 211 Warren Hall, Cornell University, Ithaca, NY 14853 >> phone: (607) 255-9645 >> >> >> >> On Mar 8, 2011, at 5:04 PM, Carlos Gonzalez Almeida wrote: >> >> Dear Dr. Zimmerman >> >> -Could you please test the example provided in the manual (t_auction_case) >> regarding zero power factor. What changes should be carried out? >> >> -Moreover, as you know, the objective function obtained in the runmarket >> is Social welfare. Could you please address me the file that you calculated >> objective function because I couldn't find it. I want to know in which file >> (the m file) you have calculated that? >> >> Best Regards >> >> Carlos >> >> >> >> On Tue, Mar 8, 2011 at 22:34, Ray Zimmerman <[email protected]> wrote: >> >>> I'm not really sure without seeing the details of your example. I'm not >>> sure I've ever tested the runmarket code with pure reactive power loads. >>> It would require reactive power bids for those loads, but I'll need the >>> details to be able to help you further. >>> >>> -- >>> Ray Zimmerman >>> Senior Research Associate >>> 211 Warren Hall, Cornell University, Ithaca, NY 14853 >>> phone: (607) 255-9645 >>> >>> >>> >>> On Mar 7, 2011, at 10:42 AM, Carlos Gonzalez Almeida wrote: >>> >>> Hi >>> >>> I am new in MATPOWER abd I want to have zero power factor for example in >>> example case of manual in runmarket, but several error are occured. please >>> tell me why >>> >>> >>> Best Wishes >>> >>> C. Gonzalez Almeida >>> >>> >>> >> >> >> Best Wishes >> >> C. Gonzalez Almeida >> >> >> > >
