It appears to me that the versions included in the
<https://github.com/power-grid-lib/pglib-opf> PGLib-OPF
c<https://github.com/power-grid-lib/pglib-opf>ollection are possibly older
versions of the corresponding cases included in MATPOWER. A quick look at the
output of case_info() for the two cases you mention reveals a rather large
discrepancy between the total generation and total load. This is not an issue
for an OPF, which dispatches generation to meet the load, but for a power flow,
the specified generation must be close enough that any difference can be
handled by the slack bus.
So, I would say that, with the generation as specified, those are simply not
valid power flow cases.
Ray
On May 25, 2021, at 12:44 PM, Abdelrahman Aldik
<[email protected]<mailto:[email protected]>> wrote:
Thanks Ray however, my concern is about rte systems taken from the OPF
taskforce collection. An example to that is the systems
"pglib_opf_case2848_rte" and "pglib_opf_case2868_rte". Matpower always diverges
when I try to use it for solving the AC PF problem. I would appreciate your
feedback in this regard.
Regards
On Tue, May 18, 2021 at 12:56 PM Ray Daniel Zimmerman
<[email protected]<mailto:[email protected]>> wrote:
All of the included RTE systems should solve without problems.
>> mpopt = mpoption('verbose', 1, 'out.all', 0);
>> runpf('case1888rte', mpopt)
MATPOWER Version 7.1, 08-Oct-2020 -- AC Power Flow (Newton)
Newton's method power flow (power balance, polar) converged in 2 iterations.
>> runpf('case1951rte', mpopt)
MATPOWER Version 7.1, 08-Oct-2020 -- AC Power Flow (Newton)
Newton's method power flow (power balance, polar) converged in 3 iterations.
>> runpf('case2848rte', mpopt)
MATPOWER Version 7.1, 08-Oct-2020 -- AC Power Flow (Newton)
Newton's method power flow (power balance, polar) converged in 2 iterations.
>> runpf('case2868rte', mpopt)
MATPOWER Version 7.1, 08-Oct-2020 -- AC Power Flow (Newton)
Newton's method power flow (power balance, polar) converged in 5 iterations.
>> runpf('case6468rte', mpopt)
MATPOWER Version 7.1, 08-Oct-2020 -- AC Power Flow (Newton)
Newton's method power flow (power balance, polar) converged in 3 iterations.
>> runpf('case6470rte', mpopt)
MATPOWER Version 7.1, 08-Oct-2020 -- AC Power Flow (Newton)
Newton's method power flow (power balance, polar) converged in 3 iterations.
>> runpf('case6495rte', mpopt)
MATPOWER Version 7.1, 08-Oct-2020 -- AC Power Flow (Newton)
Newton's method power flow (power balance, polar) converged in 2 iterations.
>> runpf('case6515rte', mpopt)
MATPOWER Version 7.1, 08-Oct-2020 -- AC Power Flow (Newton)
Newton's method power flow (power balance, polar) converged in 3 iterations.
If you get a different result, I would suggest reinstalling MATPOWER … maybe
something got corrupted with your install.
Ray
On May 14, 2021, at 12:54 AM, Abdelrahman Aldik
<[email protected]<mailto:[email protected]>> wrote:
Dears
I would like to ask you if you have encountered any issues regarding the
convergence of the AC power flow for the RTE french systems. I have tried
different starting points with no avail. Any ideas about the reason why?
Regards
--
Abdelrahman Aldik
PhD Candidate
Department of Electrical and Computer Engineering and Centre of Urban Energy
Ryerson University
CUI-030, 44 Gerrard Street East, Toronto, ON, Canada
Email: [email protected]<mailto:[email protected]>
--
Abdelrahman Aldik
PhD Candidate
Department of Electrical and Computer Engineering and Centre of Urban Energy
Ryerson University
CUI-030, 44 Gerrard Street East, Toronto, ON, Canada
Email: [email protected]<mailto:[email protected]>
