Journal
INTERNATIONAL JOURNAL OF MODELLING IDENTIFICATION AND CONTROL
Volume 32, Issue 1, Pages 85-92Publisher
INDERSCIENCE ENTERPRISES LTD
DOI: 10.1504/IJMIC.2019.101958
Keywords
wind turbine; high order sliding mode control; HOSM; maximum power point tracking; MPPT; permanent magnet synchronous generator; PMSG; disturbance observer
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This paper introduces a model-based control system for variable speed wind energy conversion system (VSWECS)-based permanent magnet synchronous generator (PMSG). Comparing to traditional wind turbines operating methods, these variable speed systems have the advantages of increasing the energy capture and reducing the mechanical stress. In order to exploit this latest advantage, a high order sliding mode (HOSM) control strategy has been developed to enhance system performances, ensure the maximum power point tracking (MPPT) and track the generator reference speed. Moreover, for the WT system, the turbine torque is considered as an immeasurable disturbance. Therefore, using a modified disturbance observer will allow direct tracking of the maximum power point. The stability analysis of the system has been proved using the Lyapunov theory. Finally, simulation results have been presented to verify the proposed approach efficiency.
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