A Space Vector Switching Pattern Hysteresis Control Strategy in VIENNA Rectifier

Abstract

The conventional hysteresis current control (C-HCC) in VIENNA rectifier is one of the simplest and economic strategies. However, current harmonics content and switching number are high, and the coupling among the three-phase cannot be eliminated. The vector control based on SVPWM has a higher control accuracy. However, SVPWM needs a large amount of computation, and the implementation process is complicated. Therefore, it is significant to research a control strategy which can combine the simplicity and rapidity of C-HCC and good control performance of vector control. In this paper, a space vector switching pattern hysteresis control (SVSP-HC) strategy is proposed. It refers to the concept of voltage vector and does not require a carrier. Compared with other hysteresis-based methods, SVSP-HC can get a better current control performance with a similar or even lower equivalent switching frequency. Moreover, the switching numbers of three-phase bridge legs are basically balanced to each other. Finally, the effectiveness and advantages of SVSP-HC have been verified through simulation and experiments.

Keywords

• Hysteresis control
• VIENNA rectifier
• switching pattern
• vector control