Exact feedback linearization-based permanent magnet synchronous generator control

Abstract

SUMMARYThis paper presents the technical aspects, theoretical analysis, and comparisons of two new permanent magnet synchronous generator (PMSG) grid-interfaced models named PMSG boost and PMSG rectifierinverter. The exact feedback linearization (EFL) control scheme is used for the effective design and stability analysis of the aforementioned models. The complexity of the EFL control laws is discussed in the light of the nonlinear coordinate transformations and linearization (local and global) of the PMSG models. We also discussed the effectiveness of the EFL control over the output Direct Current (DC) link voltage of the PMSG during the electrical grid faults and the mechanical perturbations. Moreover, we compared the aforementioned models and concluded that the stability of the PMSG rectifier-inverter is higher compared with the PMSG boost during the variation of wind speed values from minimum to maximum. Furthermore, the robustness of the EFL control scheme for the PMSG rectifier-inverter is compared with the conventional proportional and integral controller and state-feedback controller. The EFL controller reports a faster output response, better accuracy, and quicker settling time of the output DC link voltage as compared with the proportional integral controller.

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