access icon free Improved  sliding mode model reference adaptive system speed observer for fuzzy control of direct-drive permanent magnet synchronous generator wind power generation system

This study presents an improved sliding mode model reference adaptive system (SM-MRAS) speed observer for the fuzzy control of direct-drive wind power generation system with a permanent magnet synchronous generator (PMSG). The SM-MRAS speed sensorless observer is described and the corresponding algorithm is derived. The designed fuzzy controller is compared with the conventional PI controller by simulations and experiments. A dc motor is controlled to simulate the wind turbine and an active machine-side converter with space vector pulse width modulation control is adopted to realise the maximum power extraction. A 250-W PMSG experimental platform is built and the experiment results verify the validity of the proposed SM-MRAS speed observer.

Inspec keywords: synchronous motor drives; angular velocity control; control system synthesis; PI control; sensorless machine control; machine control; variable structure systems; fuzzy control; synchronous generators; DC motor drives; wind turbines; permanent magnet generators; PWM power convertors; model reference adaptive control systems; power generation control; wind power plants; observers

Other keywords: active machine-side converter; power 250 W; direct-drive wind power generation system; PMSG; PI controller; maximum power extraction; wind turbine; dc motor; SM-MRAS speed sensorless observer; sliding mode model reference adaptive system speed observer; fuzzy control; permanent magnet synchronous generator; SM-MRAS speed observer; space vector pulse width modulation control

Subjects: Multivariable control systems; Synchronous machines; Velocity, acceleration and rotation control; Self-adjusting control systems; Wind power plants; Simulation, modelling and identification; Control of electric power systems; Power convertors and power supplies to apparatus; Fuzzy control

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