Standard power flow computes flows for a specified real power dispatch pattern 
and specified generator voltage setpoints. This can result in voltage limit, 
branch flow limit and gen reactive limit violations. If you want these limits 
to be respected as well, you have to decide which of your power flow inputs you 
are willing to free up in order to fix the violation. If you can tell me that, 
I might be able to suggest a way to do it. I suspect you'll probably end up 
wanting to use an OPF with tightened constraints on certain variables.

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



On Jun 25, 2010, at 11:13 AM, Idris Musa wrote:

> Dear all,
> I am working on Distributed Generation and want to use MATPOWER for Power 
> flow analysis subjects to the following constraints; Voltage limits, Branch 
> flow limits (current limits) 
> How do I enforce this constraints to run the power flow.
> 
> Regards
> Idris 
> 
> 
> 

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