A novel converter configuration for wind applications using PWM CSI with diode rectifier and buck converter

Author

Tan, Xiaotian ; Dai, Jingya ; Wu, Bin

fYear

2011

fDate

15-18 May 2011

Firstpage

359

Lastpage

364

Abstract

A novel converter configuration is proposed in this paper for mega-watt wind energy conversion system (WECS) using permanent magnet synchronous generator (PMSG). The converter consists of a diode rectifier, a buck converter and a pulse-width-modulated (PWM) current source inverter (CSI). Two DC current requirements in the system are analyzed and compared: one from the generator and diode rectifier for maximum power point tracking (MPPT), and the other from the grid and PWM CSI to obtain desired grid power factor. The theoretical analysis concludes the necessity of a buck converter for achieving all the control objectives in the full wind turbine operating range. Moreover, control scheme is developed for MPPT and grid reactive power compensation. The DC current is controlled at the minimum required level for system loss reduction. Simulation results on a 2MW WECS demonstrate the desired performance of the proposed system over a wide range.

Keywords

PWM invertors; PWM power convertors; PWM rectifiers; electric current control; machine control; maximum power point trackers; permanent magnet generators; power factor; power generation control; reactive power control; synchronous generators; wind power plants; wind turbines; DC current control; DC current requirements; MPPT; PMSG; PWM CSI; buck converter; converter configuration; diode rectifier; grid power factor; grid reactive power compensation; maximum power point tracking; megawatt WECS; megawatt wind energy conversion system; permanent magnet synchronous generator; pulsewidth-modulated current source inverter; system loss reduction; wind turbine operating range; Capacitors; Control systems; Generators; Pulse width modulation; Reactive power; Rectifiers; Wind speed; Current source inverter; DC current minimization; Diode rectifier; PMSG; WECS;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Machines & Drives Conference (IEMDC), 2011 IEEE International

Conference_Location

Niagara Falls, ON

Print_ISBN

978-1-4577-0060-6

Type

conf

DOI

10.1109/IEMDC.2011.5994620

Filename

5994620