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Sep 10, 2019 at 15:31 vote accept Masan
Aug 22, 2019 at 2:02 history bumped CommunityBot This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Apr 21, 2019 at 0:03 history bumped CommunityBot This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
S Mar 20, 2019 at 17:00 history edited Voltage Spike CC BY-SA 4.0
make the question title reflect what is being asked
S Mar 20, 2019 at 17:00 history suggested xuva CC BY-SA 4.0
make the question title reflect what is being asked
Mar 19, 2019 at 22:50 review Suggested edits
S Mar 20, 2019 at 17:00
Mar 19, 2019 at 22:49 answer added xuva timeline score: 1
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Sep 5, 2017 at 18:58 history edited Kevin Reid
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Jul 2, 2016 at 1:53 history tweeted twitter.com/StackElectronix/status/749058313204236289
S Jun 3, 2015 at 10:23 history suggested Bence Kaulics
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Jun 3, 2015 at 8:15 review Suggested edits
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May 7, 2015 at 12:02 comment added Masan Thanks @AdeelSabir I have done that already, but it doesn't work. I guess I script the constraint wrong. But I don't know how to check it.
May 7, 2015 at 11:45 comment added Adeel @Jamaisavenir My point being, your can try a different solver for your nonlinear constrained optimization, in MATLAB platform. YALMIP allows you to use many solvers.
May 7, 2015 at 11:14 comment added Masan Thanks for your comment. But, it's an interesting phenomena for researcher who deals with constrained optimization. Anyway, would you propose a more related forum for this problem? @Li-aungYip
May 7, 2015 at 11:07 comment added Masan It is Nonlinear constrained optimization problem. But as I read matlab documentation,LMI toolbox is used for Linear problem @AdeelSabir
May 7, 2015 at 11:05 review Close votes
May 12, 2015 at 10:18
May 7, 2015 at 10:48 comment added Li-aung Yip I am voting to close this question because 'review this MATLAB code' is highly specific to this particular situation, and is unlikely to be interesting to future readers.
May 7, 2015 at 8:53 comment added Adeel I've had a similar experience using convex optimization. It sometimes depends on the solver too. A problem can be feasible under one solver and infeasible under another. The degree of feasibility also can differ with different solvers. If you are familiar with YALMIP you can choose from a variety of solvers to solve your problem. I personally found YALMIP to a be much more satisfying experience for convex optimization than MATLAB's default LMI toolbox.
May 7, 2015 at 8:39 comment added Masan Thanks for your comment. I already added the constraints sequentially and also solved them as a nonlinear system using fsolve to see if the problem is feasible. I think the constraints are feasible. But when I put it in optimization (fmincon) problem it doesn't give the optimal solution. I am now very doubtful if I wrote the constraints correctly in my codes. I also have the same problem in GAMS and that works fine. I checked my script with GAMS and I can't understand why mine doesn't work. @AdeelSabir
May 7, 2015 at 8:30 comment added Adeel I personally have not used fmincon. But my suggestion is, if you can test a similar but smaller system, and then work your way up in steps. You can also remove some constraints, then sequentially add them, to single out the constraint that causes infeasibility.
May 7, 2015 at 8:24 history edited Masan CC BY-SA 3.0
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May 7, 2015 at 8:23 comment added Masan Thanks for your point. The power system data is available in the posted file. I used IEEE New England test system to run OPF on it. This test system contains, 39 Buses, 19 Loads,10 Generators, 46 Lines. @AdeelSabir
May 7, 2015 at 8:16 comment added Adeel It would be helpful if you added some more description of your power system, like no. of generators, no. of buses and their types, loads, etc.
May 7, 2015 at 7:40 review First posts
May 7, 2015 at 8:44
May 7, 2015 at 7:37 history asked Masan CC BY-SA 3.0