That is correct. All of the callbacks are technically optional. Typically you
need the formulation callback to implement the actual problem modifications,
and possibly ext2int and int2ext if you need to do some handling of input and
output data, respectively. The printpf and savecase callbacks are only needed
if you want to add things to the standard pretty-printed output or saved case
data.
Ray
> On Mar 29, 2019, at 12:15 PM, Jubeyer Rahman <[email protected]> wrote:
>
> Just how important it is to include printpf and savecase callback during the
> extension of OPF, if I don't really need anything printed out right after I
> call the power flow? Will it be still possible to extract information from
> the 'results' when I say results=runopf(mycase)?
>
> To my understanding, after runopf being called, 'results' struct will be
> returned and can be accessed by writing some command like results.gen(:,2),
> etc. Let me know if I am thinking correctly or not?
>
> On Fri, Mar 29, 2019 at 9:53 AM Jubeyer Rahman <[email protected]
> <mailto:[email protected]>> wrote:
> Thank you very much.
>
> On Fri, Mar 29, 2019 at 8:43 AM Ray Zimmerman <[email protected]
> <mailto:[email protected]>> wrote:
> Are you attempting to use the provided extension for fixed reserves, or are
> you attempting to write your own extension?
>
> If it’s the former, the full implementation is included in toggle_reserves()
> <http://www.pserc.cornell.edu/matpower/docs/ref/matpower6.0/toggle_reserves.html>.
> Simply load your case file, use toggle_reserves() to enable the callbacks,
> then run the OPF (or just call runopf_w_res()
> <http://www.pserc.cornell.edu/matpower/docs/ref/matpower6.0/runopf_w_res.html>,
> which does these 3 steps automatically for you).
>
> If you are attempting to write your own extension, I suggest making a copy of
> toggle_reserves.m and rename it and all of the functions in it and use it as
> a template for your own extension.
>
> Ray
>
>
>> On Mar 28, 2019, at 12:40 PM, Jubeyer Rahman <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>> Hi,
>>
>> Recently I was digging through the extending OPF chapter of Matpower manual,
>> but I don't quite catch the process. Regarding the example given there on
>> 'Fixed zonal reserves' what I understand from my reading is, it is required
>> to write down a call back function for formulation along with some call of
>> callback functions. I have followed every steps mentioned there but could
>> not make the code run (I am using version 6.0). I am adding my code snippet
>> here for better conveying.
>>
>> %%%
>> mpc=loadcase('case30.m');
>> mpopt = mpoption('out.all', 0, 'verbose', 0);
>> mpc=add_usefcn(mpc,'formulation',@userfcn_reserves_formulation);
>> mpc=ext2int(mpc,mpopt);
>> results=runopf(mpc);
>> results=int2ext;
>>
>> %%%%
>> Error message:
>> Access to an object's fields is only permitted within its methods.
>>
>> I have added the mpc.reserve data(cost, req, zones) posted in
>> 't_case30_userfcns.m' file.
>> I have written the userfcn_reserves_formulation in a different script , but
>> it is not working.
>> I didn't write the add_var and add_constraint explicitly since the
>> add_userfcn callback function already contains those.
>>
>> Can you tell me what I am missing?
>>
>> Regards,
>> Jubeyer
>>
>
