Hi Waqas, Most likely there is a problem with your data. You could have a look at it in the validation view of,
immersive.erc.monash.edu.au/stac/<http://immersive.erc.monash.edu.au/stac/> to see if anything jumps out. You might also try the OPF solver, it may give you some hits on what is going wrong. If you try the SDP-OPF solver and it says your problem is infeasible, then there is surely a problem with the data. Cheers, -Carleton On Aug 8, 2015, at 7:38 PM, Syed, Waqas Ahmad Raazi <[email protected]<mailto:[email protected]>> wrote: Hi, I am trying to run a PF on a 154 bus system using Matpower and I am unable to get it converged. What I have tried so far is: 1. Increasing all the loads 2. Removing all generators and using only slack bus 3. then changing slack bus 4. trying different algorithms. Only in the algorithm of Newton Raphson I get a warning which says: Warning: Matrix is singular to working precision. > In newtonpf at 89 In runpf at 205 Kindly let me know, what should be my next course of action? Kind Regards, Waqas ________________________________ The information in this e-mail may be confidential and subject to legal professional privilege and/or copyright. National ICT Australia Limited accepts no liability for any damage caused by this email or its attachments.
