It means there is no such solution, and the results are meaningless. Please check the manual to see the difference between runpf and runopf.
On Tue, Jun 28, 2011 at 10:33 AM, Fanjun Meng <[email protected]> wrote: > Hello, > > I've been working on IEEE 123 nodes system and created a model for MatPower > power flow. This model is basically a radial distribution system with a > single generation at substation and works fine when I can use runpf(), and > it returns similar result as shown IEEE 123 node system report. However, > when I use the same model for runopf(), it shows > > > Numerically Failed > Did not converge in 4 iterations. > Did not converge (0.10 seconds) > > The total generation is very different from total demand, and bus voltages > are at strange values (e.g. 1.836p.u. at reference bus). Also, generation > cost Lambda are extremely high (e.g. 17528752586.76 $/MWh @ bus 6). I have > tried to add multiple DGs at different locations and change the system to a > ring type system, but it didn't work out. Does anyone have any suggestions > or experiences to this problem? Your help is highly appreciated! > > Have a good day!* > > Fanjun Meng > * > >
