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From: Clément on 24 Mar 2010 03:36
I am currently working in learning how to design a model for a synchronous generator. This model is very simple and is a direct transcription of the dq equations of such a machine. This model however contains an algebraic loop (and I don't see how to rewrite it without this loop). The main issue is that the algebraic loop solver manages only in some cases to solve the loop. It is depending on the parameters of the machine (Xd and Xq values). If the values of these parameters are high (but still corresponding to real synchronous machine values), Simulink outputs either a singularity error or an algebraic "trouble to solve" error . I added memory block on some chosen signals. With these blocks, no more error messages but completely incoherent results (1e100 A currents and so on) Is it because in the equations, these inductance values are determining the relative weight of some numerical
derivative terms ? What should I do to help the solver to properly solve my system ?

Thank you for your help.
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