Is Matlab/simulink capable of solving load flow for ill-conditioned network?

hello

I am currently working on some unbalanced load flow porjects. my very first case study was IEEE4-node Test Feeder [1] and I wanted to validate my results, providing from my source script which i'm 100% sure they are correct, with matlab/simulink load flow results.

The problem is the simulink laod flow solver cant converge for the 4-node feeader case and i dont know why. The Voltage source, line, transformator and load inputs are correct and double-checked as the reference stated. I tried different values for tolerance and iteration. what is the problem? is simulink LF sover capable of solving ill-condiotioned networks?

[1] - Distribution Test Feeders, IEEE PES Distribution System Analysis Subcommittee’s. Distribution Test Feeder Working Group. Available: <http://ewh.ieee.org/soc/pes/dsacom/testfeeders/>.

Answer 1

[Sabin]

It would be more helpful to attach the model for more specific advice. If the network is ill-conditioned, it will be challenging for the solver, and the solution may not converge. If there are very high/low impedances or very light loads, the solver can run into issues. It may be possible to add a small shunt load to avoid numerical issues.