1. Make sure the input data complies with the MATPOWER format. 2. Ensure that all isolated buses have been marked correctly.
2. AC power flow via Newton's method requires a good initial guess which in general is difficult to find for large test cases. The so-called "flat start" does not necessarily yield a converged solution for these cases. The larger test cases, greater than 2000 buses, in MatPower have a good initial guess included in the data files so that Newton's method converges quickly. Modifying this initial guess to a flat start makes these cases unsolvable. For some of the large test cases that I've dealt with, I've found that fast decoupled power flow solution is a good initial guess for the Newton's method (assuming FDPF converges). 4. Check the loading level: If the loading level is beyond the steady state loading limit then there is no feasible power flow solution. > On Nov 4, 2013, at 4:45 PM, Pedro Freitas <[email protected]> wrote: > > Hello everyone, > > Has anyone ever succeeded in simulating a case file of a large number of > buses? I'm trying to run a power flow simulation (runpf command) of an > approximately 3500 buses system, and it does not converge. I've tried all > algorithms but neither worked. > > Might it be a matpower limitation? I'm using matpower 4.1. > > Best regards, > > Pedro.
