Unfortunately, the current version of MATPOWER does not include
continuation power flow.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On May 8, 2007, at 9:46 PM, Sarina Adhikari wrote:
Dear Mr. Ray,
Thank you very much for your suggestion.
I would like to elaborate my problem a bit. I am trying to use
MATPOWER to see how much load a system can bear...for example: I am
increasing the load by certain factor and trying to see how far it
can go without diverging. For this, what I have to do is....until
and unless the reactive power hits the limits, the voltages at the
PV bus should be fixed at the specified value but if the reactive
power hits the limit, that particular bus is considered as a PQ bus
and then the voltage of that particular bus would be a variable. It
is similar to the traditional power flow programs.
So, could you please suggest if it is possible to do with the
present matpower?
Looking forward to hearing from you soon.
with best regards
Sarina
On 5/8/07, Ray Zimmerman <[email protected]> wrote:
It is not possible to do this directly with the OPF. I'm not sure
if this will accomplish what you want, but first you could run the
OPF with relaxed voltage limits to find the real power dispatch.
Then use that real power dispatch and run a simple power flow with
the desired voltage setpoints and the ENFORCE_Q_LIMS option set to
true. Be aware that this could cause line limits to be violated.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On May 8, 2007, at 7:52 AM, Sarina Adhikari wrote:
Dear Sir,
I have been trying to fix the voltages of the generator buses
until the generator reactive power limits are reached. However,
when I do this, the OPF simply diverges. I have already relaxed
the line limits as well as voltage limits. The thing I am trying
to do is, fix the voltages of generator buses until the reactive
power limits are reached and if one of the generator hits the
reactive power limits, simply relax the voltage constraints of
that bus and so on. But I am really having problem with this.
Is this modification possible with matpower? If yes, what could be
the easiest way to do this?
I would be very much grateful if you could send me some
suggestions regarding this at the earliest as I have been stuck on
this point.
Looking forward to hearing from you soon.
sincerely
Sarina
