Thank you so much for your help. Just another question: If I want to maximize profit instead of minimizing cost what changes in the objective function of MATPOWER and what m.files and where should be carried out? Best Regards
D. Xu On Fri, Oct 21, 2011 at 15:46, Ray Zimmerman <[email protected]> wrote: > If you call runmarket as ... > > define_constants; > [QUANTITY, PRICE, FCOST, VCOST, SCOST, PENALTY] = idx_disp; > [r, co, cb, f, dispatch, success, et] = runmarket(mpc, offers, bids, mkt, > mpopt); > > There are two equivalent ways to get the cost ... > > cost = totcost(r.gencost, r.gen(:, PG)); > cost = dispatch(:, FCOST) + dispatch(:, VCOST); > > And the profit (for generators) or benefit (for loads) is simply the > revenue minus the cost ... > > profit = dispatch(:, QUANTITY) .* dispatch(:, PRICE) - cost; > > Regarding the transformer, I had in mind something like ... > > voltage_not_ok = 1; > while voltage_not_ok > r = runpf(mpc, mpopt); % or runmarket or whatever > if <voltage in r.bus(k, VM) too low> > <increase tap in mpc.branch(i, TAP)> > elseif <voltage in r.bus(k, VM) too high> > <decrease tap in mpc.branch(i, TAP)> > else > voltage_not_ok = 0; % exit the loop > end > end > > That's just the overall idea. Obviously, you would have to make sure that > your tap update scheme does not result in cycling, etc. > > Hope this helps, > > -- > Ray Zimmerman > Senior Research Associate > 419A Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > > > On Oct 21, 2011, at 9:10 AM, Dailan Xu wrote: > > Thank you.But my mean is this: where can I find the generator costs, profit > and benefits in the runmarket results? I don't have problem in MATLAB > programming. > > Could you please explain clearer the following sentence: you could call the > power flow in a loop that adjusts the taps based on the voltages in the > solution. > > > Best Regards > > D. Xu > > > > On Fri, Oct 21, 2011 at 15:03, Ray Zimmerman <[email protected]> wrote: > >> 1. This is a very general question. Since I can't guess exactly what you >> are having trouble with, it comes across as a general Matlab programming >> question to me. If so, go find a good book on Matlab programming and spend >> some time with it. If you have a specific MATPOWER-related question (for >> example, where can I find the generator cost in the OPF results?), then >> check the manual first and if you can't find the answer I'll be happy to try >> to answer it for you. >> >> 2. The power flow routine in MATPOWER does not automatically control the >> taps on transformers to regulate voltage (see the last sentence before >> section 4.1 in the manual). However, you could call the power flow in a loop >> that adjusts the taps based on the voltages in the solution. >> >> Best regards, >> >> -- >> Ray Zimmerman >> Senior Research Associate >> 419A Warren Hall, Cornell University, Ithaca, NY 14853 >> phone: (607) 255-9645 >> >> >> >> On Oct 21, 2011, at 7:52 AM, Dailan Xu wrote: >> >> Dear Dr. Zimmerman >> >> 1. I have different kinds of loads and generations and I want to have >> profit, cost and Lamba (or market summary) in a separate matrix (each of >> them). Could you please let me know how can I do it? >> >> 2. I want to use an OLTC to centrally control the voltage of the slack >> bus. Is it possible in MATPOWER? >> >> Best Regards >> >> D. Xu >> >> >> >> > >
