Dear Carleton, Which format this tools accept, I tried to drag and drop my data as mpc and as .mat but it didn't accept it.
Best regards, On Thu, Jan 7, 2016 at 12:50 PM, Carleton Coffrin < [email protected]> wrote: > Dear Falah, > > Did you have a look at your test cases in the "validation view" of this > tool? > > immersive.erc.monash.edu.au/stac/ > > It can identify some simple issues that can make a case infeasible. > > Cheers, > -Carleton > > > On Jan 8, 2016, at 7:31 AM, Alanazi, Falah <[email protected]> > wrote: > > Dear Abhyankar, > > The power flow is runing (runpf) and converge but the optimal power flow > (runopf) is not converging. > > I used professor Ray suggestion by eliminating the branch flow limits but > still the optimal power flow (runopf) it is not converging. > > Is there any suggestion may help to find out the cause > > regards, > > > On Thu, Jan 7, 2016 at 11:50 AM, Abhyankar, Shrirang G. <[email protected]> > wrote: > >> You are running a power flow (runpf), not an optimal power flow (runopf). >> The branch limits (and the voltage constraints) are ignored for power flow >> calculations. If the power flow does not converge then most likely the >> optimal power flow may not converge either. Please take a look at >> http://www.pserc.cornell.edu//matpower/#pfconvergence for some useful >> hints on getting the power flow to converge. >> >> Shri >> >> From: <Alanazi>, Falah <[email protected]> >> Reply-To: MATPOWER discussion forum <[email protected]> >> Date: Thursday, January 7, 2016 at 1:22 PM >> To: MATPOWER discussion forum <[email protected]> >> Subject: Re: How to Show Voltage Constraints and Branch Flow Constraints >> >> Dear professor Ray, >> >> >> I eliminated the branch flow limits but still the solution didn't >> converge. >> >> also I checked the mpc values and the limits it seems ok. In addition, I >> tried to change some of the limits but still did not work >> >> I attached my data in case that may be helpful to find the problem. >> >> >> On Tue, Jan 5, 2016 at 1:30 PM, Ray Zimmerman <[email protected]> wrote: >> >>> There are many possible reasons for a non-convergent OPF. One of the >>> first things I always try is to eliminate the branch flow limits. E.g. >>> >>> define_constants; >>> mpc= loadcase ('WECC179_3Area.mat');. >>> mpopt = mpoption('out.lim.all',2) >>> mpc.branch(:, RATE_A) = 0; >>> results = runopf(mpc, mpopt); >>> >>> If that converges, then you likely have an infeasible problem, where >>> some branch flow limit can’t be satisfied without violating something else. >>> In that case, you can try multiplying the limits by some large factor that >>> you gradually reduce toward 1 and observe which constraints (including >>> voltage, reactive generation) bind hardest. They may show you which are >>> your conflicting constraints. >>> >>> Hope these ideas help point you in the right direction ... >>> >>> Ray >>> >>> >>> On Jan 5, 2016, at 12:42 PM, Alanazi, Falah <[email protected]> >>> wrote: >>> >>> Dear Ray, >>> >>> I was running AC PF and it was working but when I tried to run AC OPF >>> the solution did not converge. >>> This is my code. >>> >>> define_constants; >>> mpc= loadcase ('WECC179_3Area.mat');. >>> mpopt = mpoption('out.lim.all',2) >>> results = runopf(mpc, mpopt); >>> >>> best regards >>> >>> Falah >>> >>> >>> >>> >>> On Tue, Jan 5, 2016 at 5:40 AM, Ray Zimmerman <[email protected]> wrote: >>> >>>> The options you are using should work when running an AC OPF. Is that >>>> what you are running? >>>> >>>> Two other notes, regarding your options … >>>> 1. The ENFORCE_Q_LIMS option is only for power flow, not OPF, and that >>>> the VERBOSE option only affects display of solution progress, not >>>> final results. >>>> 2. You are mixing old-style option names (all caps) in your first line, >>>> with new-style options in the second. This still works, but the old-style >>>> options are deprecated. The new versions of ENFORCE_Q_LIMS and VERBOSE >>>> are pf.enforce_q_lims and verbose, respectively. >>>> >>>> — Ray >>>> >>>> >>>> >>>> On Jan 4, 2016, at 5:09 PM, Alanazi, Falah <[email protected]> >>>> wrote: >>>> >>>> Dear Sir, >>>> >>>> I would like to know how I can show the voltage constraints and the >>>> branch flow constraints when I run OPF. >>>> >>>> When I used the matpower cases both constraints showes up but when I >>>> used the WECC data they do not show up. I tried to use >>>> >>>> mpopt = mpoption('ENFORCE_Q_LIMS',0,'VERBOSE',3); >>>> mpopt = mpoption(mpopt,'out.lim.all',2) >>>> >>>> best regards >>>> >>>> Falah >>>> >>>> >>>> >>> >>> >> > > > ------------------------------ > > The information in this e-mail may be confidential and subject to legal > professional privilege and/or copyright. National ICT Australia Limited > accepts no liability for any damage caused by this email or its attachments. >
