Thank you! Does two the case of two isolated busses ( busses that are connected to each other but not to the remainder of the grid) counts for isolated buses? Or only single buses do?
On Thu, Feb 20, 2014 at 3:37 PM, Abhyankar, Shrirang G. <[email protected] > wrote: > I believe the power flow and OPF do work for islands provided you have > reference bus in each of the islands. One possibility for the solver > failure is the presence of isolated buses (buses that do not have any > transmission lines connected) in the islands. If there are any isolated > buses then you need to set its bus_type=4 in the bus data. > > BUS_AREA field is only used for petty printing purposes, it is not used > in the solution process. > > Shri > From: Petr Kaplunovich <[email protected]> > Reply-To: MATPOWER discussion forum <[email protected]> > Date: Thu, 20 Feb 2014 15:15:40 -0500 > To: "[email protected]" <[email protected]> > Subject: Case of islanding > > I have a network with islanding (graph is not connected) and trying to > run both DCOPF and DCPF on it. As I found in archives of this list, Prof. > *Zimmerman *replied once that if each island has a reference bus > (mpc.bus(i,2)=3) then both functions should work fine. However I keep on > getting matrix singularity matlab error for DCPF function and "solution is > primal infeasible" for DCOPF function. > > So the questions are - do DCOPF and DCPF MATPOWER solvers still work for > islanding cases? Any thoughts on why I may be getting this errors? Should I > set BUS_AREA field? > > Thank you! > Petr > >
