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This paper presents an analytical development for the Nyquist trajectory of the closed loop system of a
Voltage Source Inverter with resonant control strategy. Both inner current loop and outer voltage loop
are taken into account, and the interaction between them is studied. The stability boundaries depending
on different parameters are determined. Firstly, the system is modelled and analysed in continuous
time. Secondly, the analysis is conducted in the discrete time domain. A numeric study supported with
graphical representations is provided for complex analytic situations.
CitacióSanchez, E., Heredero-Peris, D., Montesinos-Miracle, D. Stability analysis of current and voltage resonant controllers for Voltage Source Converters. A: European Conference on Power Electronics and Applications. "17th European Conference on Power Electronics and Applications". Ginebra: 2015, p. 1-10.