On May 27, 2008, at 3:33 PM, [email protected] wrote:
Firstly,I wonder that in Matpower the 'runopf' considered the
branch power
limits as inequality constriants or not.
Yes.
If yes, that is the 'rateA' of the 'branch' matrix?
Yes.
Or that is the apparent power limits?
And yes.
Would you please tell me which data are the constriants of branch
active power Pij's limits?
rateA is used as the branch flow limit. By default, this is an
apparent power flow limit. However, when using certain solvers
(fmincon, OPF_ALG = 520) you have the option of using an active power
or current limit instead. Type 'help mpoption' and look for the
OPF_FLOW_LIM option.
Secondly, the inequality constriants condition include what else
in 'runopf'?
Generator limits (active and reactive power, upper and lower limits),
upper and lower bus voltage magnitude limits, branch voltage angle
limits (optional), trapezoidal generator capability curve (see pages
17-18 of manual). Piece-wise linear generator costs are also
implemented using additional cost variables and inequality constraints.
Best regards,
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
