Why load flow do not converge for Kundur two area system with Induction Motor as load?

Currently I am working on small signal stability analysis of Kundur two areas system with different types of load modelling. I am using induction motor as load and it does not converge the load flow in 50 iteration. How can i solve this issues. If any one has solution for this, i would be grateful.

Thank you.

Answer 1

[UDAYA PEDDIRAJU]

Hi Sonam,

Induction motors in load flow can cause convergence issues. Here's what might help:

1. Verify Motor Model: Ensure accurate motor parameters or use simpler models (ZIP) if detailed data is unavailable.
2. Consider System Stiffness: If your system is very stiff, introduce some impedance (e.g., series reactance) to potentially aid convergence.
3. Adjust Solver Settings: Relax convergence tolerances or increase iterations in your power flow solver. Consider alternative solvers if issues persist.
4. Check for Modeling Inconsistencies: Double-check your motor model representation in the load flow software for consistency.

Start simple (no motors) and gradually increase complexity to isolate the problem. Refer to following documentation for more details: https://www.mathworks.com/help/sps/powersys/ref/loadflowanalyzer-app.html