Other than moving to a DC OPF, I don't think I have any good ideas. -- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645
On Apr 16, 2013, at 9:44 AM, Aftognosia Aftognosia <[email protected]> wrote: > Thank you, > > I would like to pose a general question ie.the nonlinear P^2 + Q^2 <= Smax^2 > , regarding the P,Q flows on a line, can it be linearized in some way? > I was thinking to say P = S*cos(theta) , Q = S *sin(theta), with 0<= theta > <= pi/2 , but again this is nonlinear as it containts sin and cos . > > I am trying to build a linear version of this constraint many weeks now, and > I would like, if possible, any idea from you , if you have thought of it. > This would help eg in a simple linear program, with line constraints. > > Thank you, > John Eaftos > > From: Ray Zimmerman <[email protected]> > To: MATPOWER discussion forum <[email protected]> > Sent: Tuesday, April 16, 2013 1:20 PM > Subject: Re: MATPOWER > > It should work fine depending on the parameters. Very high R/X ratios in the > lines can possibly cause numerical difficulties. And, of course, MATPOWER > would only model a balanced system. It does not model an unbalanced 3-phase > network. > > -- > Ray Zimmerman > Senior Research Associate > 419A Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > > > On Apr 15, 2013, at 1:36 PM, Aftognosia Aftognosia <[email protected]> > wrote: > >> Hello, >> >> Is it possible to use MATPOWER in order to implement ACOPF in a radial >> distribution system ? >> >> Are there any limitations for distribution system? >> >> > > >
