一种双馈风力电机网侧变流器控制策略的研究

A Control Strategy of Supply-side Voltage Source Rectifier in Doubly-fed Induction Generating System

根据双馈风力发电机的运行特点,设计了网侧三相电压型变流器。在分析变流器数学模型的基础上,采用解耦控制,前馈控制和双闭环控制,实现了能量的双向流动。实验结果与理论分析表明,具有双闭环控制的网侧变流器能够有效地稳定直流侧电压,并能很好地控制网侧电流,整个系统具有良好的静态和动态特性。

A supply-side voltage source rectifier（VSR） in doubly-fed induction generating（DFIG） system is designed based on the operation characters of the DFIG.The mathematic model of the VSR is analyzed and decoupled control, feed-forward control and the dual-close-loop control are adapted in the system.The theory analyses and experimental results show that the designed VSR with dual-close-loop can restrain fluctuant DC voltage effectively and it has excellent steady-state and dynamic performance.