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Corresponding Author

Mohamed, Mohamed El-Sayed

Subject Area

Electrical Engineering

Article Type

Original Study

Abstract

Direct coupling of Wind Turbine WT becomes feasible with modern Permanent Magnet Synchronous Generators PMSG. This paper presents a sensorless Maximum Power Point Tracker MPPT for a grid connected PMSG direct driven fixed pitch WT. The MPPT objectives are: to track the maximum output power form the WT and to guarantee efficient operation of PNISG. A new and simple rotor position, speed and motor flux magnitude estimator based on the PMSG model is proposed. The estimator evades using the stator current derivatives calculation, which is an Inherent drawback of the buck-EMF based estimators, The PMSG estimated speed is led to the MPPT to calculate the reference stator currents. A field weakening algorithm is also designed to widen the operating speed range of the PMSG. The sensltivity of the proposed sensorless MPPT 1o PMSG parameters mismatch is investigated and studied. Finally, the control scheme is tested and investigated under various operating conditions and demonstrated excellent steady state and dynamic performance.

Keywords

MPPT; Sensorless; PMSG; Wind turbine

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