I found the error I should had defined that Pb =g= Pdis and Pb=g=Pch. Now conopt3 works fine

Î¤Î· Î Î±ÏÎ±ÏƒÎºÎµÏ…Î®, 23 Î‘Ï…Î³Î¿ÏÏƒÏ„Î¿Ï… 2013 8:57:49 Î¼.Î¼. UTC+3, Î¿ Ï‡ÏÎ®ÏƒÏ„Î·Ï‚ saosan ÎÎ³ÏÎ±ÏˆÎµ:

The problem is situated on the below statement:

AVA1(BSS(N),Off(T))… Qava(N,T) =e= sqrt(sqr(Pb(N))-sqr(Pch(N,T)));

AVA2(BSS(N),On(T))… Qava(N,T) =e= sqrt(sqr(Pb(N))-sqr(Pdis(N,T))));

where BSS(N) are the busses in which there are batteries. On(T) is a subset of set T/1*24/ which has this format /1*8/ and off(T) is the complementary set of On.

Qava is the available reactive power. Pb(N) is the rated power of battery, Pch is the active power of charging and Pdis is the active power of discharging.

Snopt solver works in this model. If I want to work conopt solver this happens only if I eliminiate sqrt from the statements. Any idea why does it happen?

Thanks a lot

Î¤Î· Î ÎÎ¼Ï€Ï„Î·, 22 Î‘Ï…Î³Î¿ÏÏƒÏ„Î¿Ï… 2013 11:38:22 Î¼.Î¼. UTC+3, Î¿ Ï‡ÏÎ®ÏƒÏ„Î·Ï‚ saosan ÎÎ³ÏÎ±ÏˆÎµ:

I am trying to solve one power flow problem. The strange thing in this effort is that I should use two solvers to give me the optimal solution.

I can not understand how conopt solve more dificult problem (active and reactive power flow) and can not give me solution for only active power flow. So in this case I use snopt which gave the optimal values to me.

Any idea?

Thanks a lot

–

To unsubscribe from this group and stop receiving emails from it, send an email to gamsworld+unsubscribe@googlegroups.com.

To post to this group, send email to gamsworld@googlegroups.com.

Visit this group at http://groups.google.com/group/gamsworld.

For more options, visit https://groups.google.com/groups/opt_out.