How to avoid algebraic loop problem

I am using blocks from Simulink to make my own power system model which includes one generator, one transmission line, one induction motor, one rectifier with transformer. All of them are based on their equations. I am not using any existing model from SimPowerSystem. But my generator model and induction motor model are very similar to SimPowerSystem's since the equations are the same. I encounter Algebraic Loop Problem right now. Most of them occur at the current summation. At the beginning, I tried to add some "memory" blocks to some places where there are algebraic loop and my model runs. But I want to use Accelerator Mode which requires no algebraic loop at all to start running. So I added more "memory" blocks to the other places. The consequence is the model is running at Accelerator Model with NO waveforms in any scope. I don't know what to do right now. p.s. I tried "unit delay" as well, but the same consequence.

Does anybody meet this problem before or give me some guidance on this issue? Thanks a lot!!!

Answer 1

[Fangjun Jiang]

It depends. But you can start from here. Algebraic Loops