If I am not mistaken we are discussing a unit commitment with AC OPF embeded. It is doable for very small systems. I did it ten years ago. UC always has some type of DC OPF, ED, or such implicitly or explicitly built in, there is not reason why AC OPF cannot be used.
On Tue, Aug 3, 2010 at 9:42 AM, Ray Zimmerman <[email protected]> wrote: > Marcelo, > > I assume that when you say "multi-period OPF" you are referring to more than > simply running multiple single-period OPFs in sequence. I implemented a very > basic mulit-period OPF prototype a few months ago with ramp limits > restricting the change in generator dispatch from period to period. I did it > by replicating the network (with new bus numbers) for each period, so that > each period appears as an island in a single large network. Then you can > apply constraints (such as ramp limits) across the islands Mine was a very > basic prototype (not suitable for distribution) to demonstrate the idea and > didn't take into account all of the possibilities for units being off-line in > certain periods and things like that. > > So that would be my approach to implementing a multi-period OPF in MATPOWER. > > -- > Ray Zimmerman > Senior Research Associate > 211 Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > > On Aug 3, 2010, at 9:43 AM, Andreas Floss wrote: > >> Dear Marcelo, dear all, >> >> i'm working on the issue of "multi-period" OPF. Main steps towards a OPF >> over time are: >> >> 1 Identify variables that change over time (Pdem, Pgen, Qdem, ...). >> 2 Implement a loop (for or while) with the choosen amount of time steps. >> 3 Choose inside the loop: >> a) Assemble new OPF input matrices with additional dimension "time" >> from old two dimensional matrices, >> b) or manipulate values of input matrices (identified variables). >> 4 Save OPF results either in result matrices or other data format. >> >> This is basically the way I did it. I would now prefer number 3b) >> working with huge amounts of time steps (>35040) because of massive >> overhead data. >> >> Hope this helps, >> Andreas >> >> --- >> Andreas Floss >> Sustainable Electric Networks and Sources of Energy >> Technical University of Berlin >> >> Elizondo, Marcelo A schrieb: >>> Dear all, >>> Could anybody tell me how to implemented a multi-period OPF in Matpower? >>> I would appreciate if you can share your code with me. >>> >>> Thank you, >>> Marcelo >>> >>> __________________________________________________ >>> *Marcelo A. Elizondo, Ph.D.* >>> Power System Research Engineer >>> Pacific Northwest National Laboratory >>> >>> >>> >>> >> > > > >
