Re: How to Show Voltage Constraints and Branch Flow Constraints

It looks like you’re running the check* functions on the original mpc, not the solved power flow case, which won’t give you anything useful. I would start with checklimits(), which can check the active power and flow constraints, and actually prints a pretty nice summary … r = runpf(mpc); [Fv,

Re: How to Show Voltage Constraints and Branch Flow Constraints

Hi, Dr. Zimmerman: In my case, the optimal power flow result is numerically failed. I tried to use check_feasibility(mpc) to find out the reason. The following is the result. V = check_feasibility(mpc) V = 0.6097 Does this mean my generation is not enough? But after I increased the

Re: How to Show Voltage Constraints and Branch Flow Constraints

Ok, here are a few more ideas … Did you try checking the bus voltage limits and generator real and reactive power limits for the successful power flow solution? You might find the check_feasibility

Re: How to Show Voltage Constraints and Branch Flow Constraints

2 PM To: MATPOWER discussion forum <matpowe...@list.cornell.edu<mailto:matpowe...@list.cornell.edu>> 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

Re: How to Show Voltage Constraints and Branch Flow Constraints

.@oregonstate.edu> > Reply-To: MATPOWER discussion forum <matpowe...@list.cornell.edu> > Date: Thursday, January 7, 2016 at 1:22 PM > To: MATPOWER discussion forum <matpowe...@list.cornell.edu> > Subject: Re: How to Show Voltage Constraints and Branch Flow Constraints > >

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

Re: How to Show Voltage Constraints and Branch Flow Constraints

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

Re: How to Show Voltage Constraints and Branch Flow Constraints

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

How to Show Voltage Constraints and Branch Flow Constraints

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);