Self-adaptive multi-stage IGBT driving method in medium voltage wind generation system

As the rated power of wind power convertors grows higher, the medium voltage power conversion technology is introduced into the wind power system. Nevertheless, such a system has some problems of reliability caused by the large di/dt and du/dt on the switch components. This paper studies a self-adaptive multi-stage driving method for high voltage IGBT. This method can reduce the current overshoot effectively at turning on. Then an active clamped method based on adaptive multi-stage driving when the IGBT turns off is also studied. What is more, the self-adaptive concept is involved especially for the application in wind energy systems, which means the driver parameter can be changed on-line according to the power fluctuation of wind power. The experimental results validate the feasibility and effectiveness of this method.