Are you saying you have modified the interior point algorithm (MIPS) used by 
MATPOWER, or something else? It's impossible to suggest what the problem may be 
without a clear description of what you are doing.

-- 
Ray Zimmerman
Senior Research Associate
419A Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645




On Apr 21, 2013, at 11:03 PM, 舒 <[email protected]> wrote:

> Hello,
> recently ,i modify the OPF with interior point algorithm. for the 
>  f_fcn = @opf_objfcn;   %目标函数  可以包括grad+hessian 
>  gh_fcn = @opf_constraintsfcn;  %等式约束+grad 
>  ipm_hessian = @opf_hessmatrixfcn;  %hessian  
> 
> are the same, but the result is different with matpower .I don't know why.who 
> can help me
> 
> 
> 
> 
> --
> -----------------------------------------------------
> 
> 舒德兀(Alex)
> 
> schools of electrical engineering and automation ,Tsinghua University,China..
> 
> 
> At 2013-04-22 01:41:24,"angelina sirri" <[email protected]> wrote:
> Hi everyone!
> I am running ac opf in case ieee24 bus, doing a reliability analysis.In some 
> hours the opf does not converge and I observe that in mpc.gen Qg exceeds the 
> Qmin and Qmax limits. During these hours, the there is not a failure  , and 
> all the branches and generators have status=1. When this problem appears in 
> an opf which are the possible solutions?What I should correct, take into 
> account or change in order not to exceed the reactive power limits??
> Any help would be great!
> Regards,
> Angelina
> 
> 

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