When I think of a multi-period OPF, I think of something that simultaneously
solves for the dispatch of several different time periods, typically with some
inter-temporal constraints of some sort. If that's what you mean too, then I
think the answer is no. The code below cannot be used to solve such a
multi-period OPF. If all you want to do is solve a sequence of independent
OPFs, or even a sequence of OPFs where the inputs of one depend on the outputs
of the previous, then certainly the structure of that code can be used.
--
Ray Zimmerman
Senior Research Associate
419A Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Mar 23, 2012, at 5:23 PM, Carlos Gonzalez Almeida wrote:
> Dear Dr. Zimmerman,
>
> Can I do a multiperiod OPF by this method, i.e. as the following code that
> you have written?
>
> define_constants;
> mpc = loadcase('mybasecase');
> for k = 1:52
> mpc.bus(:, PD) = load_profile(:, k);
> mpc.gen(:, PG) = gen_profile(:, k);
> r = runpf(mpc);
> loss(k) = sum(mpc.gen(:, PG)) - sum(mpc.bus(:, PD));
> end
> total_loss = sum(loss);
>
> Regards
>
> C. Gonzalez Almeida
>
>
> On Thu, Mar 22, 2012 at 13:39, Ray Zimmerman <[email protected]> wrote:
> Here's what I would do. Create a matrix gen_profile with the generator output
> values, where each row corresponds to a generator and each column to a week
> of the year. You could set up another matrix load_profile with the nodal
> loads in it, then do something like the following ...
>
> define_constants;
> mpc = loadcase('mybasecase');
> for k = 1:52
> mpc.bus(:, PD) = load_profile(:, k);
> mpc.gen(:, PG) = gen_profile(:, k);
> r = runpf(mpc);
> loss(k) = sum(mpc.gen(:, PG)) - sum(mpc.bus(:, PD));
> end
> total_loss = sum(loss);
>
> Hope this helps,
>
> --
> Ray Zimmerman
> Senior Research Associate
> 419A Warren Hall, Cornell University, Ithaca, NY 14853
> phone: (607) 255-9645
>
>
>
>
> On Mar 22, 2012, at 4:24 AM, Ruhaizad Ishak wrote:
>
>> Dear All,
>>
>> First of all please forgive if the question that I wanted to ask here sounds
>> repetitive. I am new in this community.
>>
>> I had browsed through the archive but couldn't find any similar topic or
>> otherwise I may missed it.
>>
>> Although found one closely related on how to add generator but mine is a
>> liitle bit different.
>>
>> Using the existing generators (same number of generators) how can I change
>> the output of each generator?
>>
>> So far I tried the same method for changing load power demand but it doesn't
>> work.
>>
>> Apart from changing the output, I also plan to set an output profile for
>> each generator for certain time frame (such as 52 weeks.)
>>
>> For example:
>> Generator 1
>> Week 1: 20 MW
>> Week 2: 40 MW
>> Week 3: 25 MW
>>
>> Generator 2
>> Week 1: 10 MW
>> Week 2: 25 MW
>> Week 3: 13 MW
>>
>> Then I would like to find the total losess for the system in MWh unit.
>>
>> Can someone guide me on this?
>>
>> I appreciate your helpful advice and comment in advance.
>>
>> Thank you.
>>
>>
>>
>>
>
>
