RE: PF Convergance
Yes I noticed that and I executed it after fixing that. I still got those errors. Waqas From: bounce-119535447-73713...@list.cornell.edu [bounce-119535447-73713...@list.cornell.edu] on behalf of Abhyankar, Shrirang G. [abhy...@anl.gov] Sent: 14 August 2015 22:07 To: MATPOWER discussion forum Subject: Re: PF Convergance There is a typo in MATPOWER Faq # 5 mpc.bus(:, PD) = 0; mpc.bus(:, QD) = 0; mpc.gen(:, PG) = 0; should be mpcbase.bus(:, PD) = 0; mpcbase.bus(:, QD) = 0; mpcbase.gen(:, PG) = 0; Shri From: Syed, Waqas Ahmad Raazi waqas.s...@rwth-aachen.demailto:waqas.s...@rwth-aachen.de Reply-To: MATPOWER discussion forum matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu Date: Friday, August 14, 2015 at 6:12 AM To: matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu Subject: PF Convergance Hi everyone, So, I was having trouble with PF convergance and then I looked into Faq#5 Why does MATPOWER power flow not converge?http://www.pserc.cornell.edu//matpower/#pfconvergence Now in that FAQ, I am having trouble with point number 5. When I try to run the CPF from 0 load and generation to the target case, I get following errors and warnings: step 1 : lambda =NaN, corrector did not converge in 10 iterations NaN's cannot be converted to logicals. Error in printpf (line 175) nzld = find((bus(:, PD) | bus(:, QD)) bus(:, BUS_TYPE) ~= NONE); Error in runcpf (line 392) printpf(results, 1, mpopt); Error in Wildpoldsried_Extraction (line 236) results = runcpf(mpcbase, mpctarget); Warnings: Warning: Matrix is singular to working precision. In newtonpf at 89 In runcpf at 203 In Wildpoldsried_Extraction at 236 Warning: Matrix is singular to working precision. In cpf_predictor at 71 In runcpf at 249 In Wildpoldsried_Extraction at 236 Kindly let me know if you guys have any idea on how to address these issues. Kind Regards, Waqas
PF Convergance
Hi everyone, So, I was having trouble with PF convergance and then I looked into Faq#5 Why does MATPOWER power flow not converge?http://www.pserc.cornell.edu//matpower/#pfconvergence Now in that FAQ, I am having trouble with point number 5. When I try to run the CPF from 0 load and generation to the target case, I get following errors and warnings: step 1 : lambda =NaN, corrector did not converge in 10 iterations NaN's cannot be converted to logicals. Error in printpf (line 175) nzld = find((bus(:, PD) | bus(:, QD)) bus(:, BUS_TYPE) ~= NONE); Error in runcpf (line 392) printpf(results, 1, mpopt); Error in Wildpoldsried_Extraction (line 236) results = runcpf(mpcbase, mpctarget); Warnings: Warning: Matrix is singular to working precision. In newtonpf at 89 In runcpf at 203 In Wildpoldsried_Extraction at 236 Warning: Matrix is singular to working precision. In cpf_predictor at 71 In runcpf at 249 In Wildpoldsried_Extraction at 236 Kindly let me know if you guys have any idea on how to address these issues. Kind Regards, Waqas
Power Flow not converging
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
PF Not converging
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
