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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...
This paper presents a novel power-factor (PF) control strategy for a high-power pulsewidth-modulated current-source rectifier-current-source inverter-fed motor drive system. The PF regulation is realized by adjusting the motor flux in the drive's field-oriented control scheme. The relationship between the motor flux and the drive's input reactive power is first investigated. Based on this analysis,...
For medium voltage high power grid-interfacing converters, the operating switching frequency is often around several hundred Hz to reduce the switching power losses. Therefore, to eliminate the even order harmonics and non-characteristic harmonics and to minimize the beat phenomenon, synchronous PWM techniques are desired for the high power low-switching converters. In this paper, a direct PWM synchronization...
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