On Dec 1, 2013, at 10:25 AM, Aftognosia Aftognosia wrote:
> Dear Dr Zimmerman,
>
> After the OPF is solved, how can I see the Ybus matrix for the system ?
mpc = runopf('casename')
Ybus = makeYbus(mpc.baseMVA,mpc.bus,mpc.branch);
>
> Secondly, I have 20 lines. All lines have similar resistance. Instead of
> manually adding the resistance in the
> matrix, is there another way of doing it ? Ie do I enter this code in the
> runopf () as parameter?
define_constants;
mpc.branch(:,BR_R) = <res_value>
mpcout = runopf(mpc);
Shri
>
> Thank you
>
>
> On Wednesday, November 27, 2013 5:58 PM, Shri <[email protected]> wrote:
> You can unsubscribe from the list at any time by sending an e-mail to
> [email protected] with the following line in the body of the
> message.
> leave
>
> On Nov 27, 2013, at 11:42 AM, Hamed Pourgharibshahi wrote:
>
>> Dear Dr.Ziverman
>> Please don't send me these emails.
>> Best regerds
>> Hamed Shahi
>>
>>
>> On Wed, Nov 27, 2013 at 8:36 PM, Ray Zimmerman <[email protected]> wrote:
>> I suppose it depends … do you want to minimize costs in the other areas as
>> well, subject to fixed exchange schedules? If so, yes, I think working with
>> toggle_iflims.m is best. If, on the other hand, you are only interested in
>> minimizing cost in one area, with the dispatches fixed in other areas, then
>> I think fixing those dispatches (PG=PMIN=PMAX) is sufficient to fix all of
>> the interface flows as well and you don’t even need additional interface
>> flow constraints.
>>
>> --
>> Ray Zimmerman
>> Senior Research Associate
>> B30 Warren Hall, Cornell University, Ithaca, NY 14853
>> phone: (607) 255-9645
>>
>>
>>
>> On Nov 26, 2013, at 8:10 PM, Henry Lin <[email protected]> wrote:
>>
>>> Dear Dr. Zimmerman,
>>>
>>> Thanks a lot for your help.
>>>
>>> I want to minimize the cost of generation of one area subject to a fixed
>>> value for the exchange between all the other areas. Shall I still work with
>>> toggle_iflims.m as you suggested or you have some other suggestions?
>>>
>>>
>>> Thanks a lot.
>>>
>>> Best,
>>>
>>> Henry
>>>
>>>
>>>
>>>
>>> 2013/11/26 Ray Zimmerman <[email protected]>
>>> Sorry, somehow my previous reply never got sent …
>>>
>>> So, what exactly do you want to optimize, if you are specifying the import
>>> and export? Are you saying you want to minimize cost of generation in both
>>> areas subject to a fixed value for the total exchange between the two
>>> areas? If so, the best you can do is constrain the net flow (DC
>>> approximation) to equal your specified value. The easiest thing is probably
>>> to start with the code in toggle_iflims.m and modify it to use an equality
>>> constraint instead of an inequality constraint on the interface flow.
>>>
>>> --
>>> Ray Zimmerman
>>> Senior Research Associate
>>> B30 Warren Hall, Cornell University, Ithaca, NY 14853
>>> phone: (607) 255-9645
>>>
>>>
>>>
>>> On Nov 26, 2013, at 10:43 AM, 车 <[email protected]> wrote:
>>>
>>>> Hi Matpower users,
>>>>
>>>> Anybody have any ideas about how to calculate opf with the total import
>>>> power and export power specified?
>>>>
>>>>
>>>> Thanks a lot
>>>>
>>>> Lin
>>>>
>>>> On Nov 25, 2013, at 8:59, Henry Lin <[email protected]> wrote:
>>>>
>>>>> Dear all,
>>>>>
>>>>> I am trying to use OPF with area interchange being specified. I know how
>>>>> much power is going to be import and export.
>>>>>
>>>>> How can I do it using Matpower?
>>>>>
>>>>>
>>>>> Thanks,
>>>>> Henry
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>
>
>
