Eigenvalues stability related to system components ?

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waell telmesani
waell telmesani on 23 Feb 2018
Commented: waell telmesani on 22 Nov 2019
Eigenvalues stability related to system components? Hi, My system is VSI grid connected to the voltage and current controller in dq-frame. I found the eigenvalues of the system as clear in the picture. there are two positive values which mean the system is unstable but in the Simulink the system is stable, so that means I have some mistakes in the small signal model. How can I know which part of the system makes those two eigenvalues positive (unstable)??? Thanks in advance
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waell telmesani
waell telmesani on 22 Nov 2019
Hi,
Most probably you have a mistake in your mathimatical model. In Simulink, check the response of the system under different solvers (i.e, discrete(50e-6 s and 10e-6 s), continous) to make sure the response doesn't change.

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