The control strategy of current-fed Z-source inverter in wind power grid

Z-source inverter has been a hotspot in current researches for its many unique advantages and characteristics. As the inverter is one of the most important components of grid-connected system, developing inverter control strategy has become the focus of research. Based on the analysis of the mathematical model of wind power grid inverter system, the researcher uses different modulation solutions to modulate the current-fed inverter and designs appropriate logic switch equation to control the current-fed Z-source inverter. This paper adopts three-value logic SPWM control method and the simulation results show that this control strategy can achieve good control performance and realize the unit power factor correction.