This paper investigates the output impedance of a permanent magnet synchronous generator (PMSG) in dq reference frame, taking the torsional interactions into account. The dynamic behavior of the PMSG drive-train is modelled through both one-mass and two-mass mechanical models. The obtained model is included in the overall output impedance of a grid-connected wind energy conversion system (WECS). According to the analytical model found in this paper, which is also verified by simulation results in Matlab/Simulink, low frequency resonances may appear in the output impedance of the WECS, due to torsional interactions.
Effect of Torsional Interactions on the Output Impedance of PMSG-Based Wind Turbines
Aram Khodamoradi;P. Mattavelli
;F. Cavazzana
2018
Abstract
This paper investigates the output impedance of a permanent magnet synchronous generator (PMSG) in dq reference frame, taking the torsional interactions into account. The dynamic behavior of the PMSG drive-train is modelled through both one-mass and two-mass mechanical models. The obtained model is included in the overall output impedance of a grid-connected wind energy conversion system (WECS). According to the analytical model found in this paper, which is also verified by simulation results in Matlab/Simulink, low frequency resonances may appear in the output impedance of the WECS, due to torsional interactions.
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