This paper presents a control strategy for output maximisation of a direct drive permanent magnet synchronous generator (PMSG)-based small-scale variable-speed wind turbine. The control topology uses a single switch three-phase switch-mode rectifier and the generator torque, and power is controlled by controlling the switch duty cycle of the switch. To extract maximum power from the wind, the torque reference of the PMSG is calculated from generator speed and wind turbine characteristics. From this torque reference, a current reference is calculated using measured DC link voltage and generator speed. The current error is then used to control the duty cycle of the switch-mode rectifier and thereby torque of the generator is regulated through a proportional-integral regulator. The operational characteristics of the generating system are investigated under varying wind speed through extensive simulations and the results confirm that the proposed control strategy can maximise the output power under fluctuating wind speeds. © Institution of Engineers Australia, 2009.

Item Type:	Refereed Article
Research Division:	Engineering
Research Group:	Electrical engineering
Research Field:	Electrical energy generation (incl. renewables, excl. photovoltaics)
Objective Division:	Energy
Objective Group:	Renewable energy
Objective Field:	Wind energy
UTAS Author:	Haque, ME (Dr Md Enamul Haque)
UTAS Author:	Negnevitsky, M (Professor Michael Negnevitsky)
ID Code:	60751
Year Published:	2009
Deposited By:	Engineering
Deposited On:	2010-02-18
Last Modified:	2010-06-16
Downloads:	0