Could you clarify the question?
Ray
On May 2, 2014, at 1:12 PM, Angie Joaqui Rendon <[email protected]> wrote:
> Regards
>
> OPF result for the system of nine nodes ($ 5,296.69 / h), it considers only
> the missing I^2*Z?
>
> Thanks
>
> Date: Mon, 28 Apr 2014 09:32:01 -0500
> Subject: Re: Reactive Losses Power Flow
> From: [email protected]
> To: [email protected]
>
> If your are running ACPF simply change that value and the limits:
>
>
> from:
>
> 39 1000 78.4674 300 -100 1.03 100 1 1100 0
> 0 0 0 0 0 0 0 0 0 0
> 0;
> to:
>
> 39 500 78.4674 300 -100 1.03 100 1 500 0
> 0 0 0 0 0 0 0 0 0 0
> 0;
>
> Those 500MW will be generated by the slack bus.
>
>
>
>
> 2014-04-12 12:53 GMT-05:00 Mahmoud Abdallah <[email protected]>:
>
> dear sir
> I use matpower 3.2
>
> I use runpf on case 39 and I wish to limit power generated at bus 39 to
> certain value how can I do that ?
>
> first guess for power generated from generator at bus 39 = 1000 MW
> I wish to make it generate only 500 MW
>
> thank you in advance
> Eng. Mahmoud abdallah
> Teaching Assistant
> Ain Shams University
> Faculty of Engineering
> On Friday, April 11, 2014 6:19 AM, Ray Zimmerman <[email protected]> wrote:
> I assume you are referring to the “System Summary” part of the MATPOWER
> output?
>
> ================================================================================
> | System Summary
> |
> ================================================================================
>
> How many? How much? P (MW) Q (MVAr)
> --------------------- ------------------- ------------- -----------------
> Buses 9 Total Gen Capacity 820.0 -900.0 to 900.0
> Generators 3 On-line Capacity 820.0 -900.0 to 900.0
> Committed Gens 3 Generation (actual) 320.0 34.9
> Loads 3 Load 315.0 115.0
> Fixed 3 Fixed 315.0 115.0
> Dispatchable 0 Dispatchable -0.0 of -0.0 -0.0
> Shunts 0 Shunt (inj) -0.0 0.0
> Branches 9 Losses (I^2 * Z) 4.95 51.31
> Transformers 0 Branch Charging (inj) - 131.4
> Inter-ties 0 Total Inter-tie Flow 0.0 0.0
> Areas 1
>
>
> If so, please notice that series losses and the branch charging are listed
> separately. So the total reactive loss in the line is the series loss minus
> the branch charging injection.
>
> Ray
>
>
> --
> Ray Zimmerman
> Senior Research Associate
> B30 Warren Hall, Cornell University, Ithaca, NY 14853
> phone: (607) 255-9645
>
>
>
> On Apr 10, 2014, at 5:59 PM, Angie Joaqui Rendon <[email protected]> wrote:
>
> Regards
>
> I am working with the module of power flow, and i want know if the reactive
> losses that shows me the program considers the capacitive effects of the
> lines?.
>
> I am comparing results with other malingerers and these do not coincide with
> some results that gives me MATPOWER, and differ for the lines that possess a
> high capacitive value.
>
> I appreciate the information that you can give me.
