变速变频风力发电系统最优风能捕获运行方式

Optimal Wind Power Capturing Operational Mode of a Variable-speed Variable-frequency Wind Power Generation System

在分析异步风力发电系统模型的基础上,结合分频输电技术,提出了一种新型的异步风力发电系统运行方式——变速变频(VSVF)方式。对在该运行方式下通过以转子磁链定向的矢量控制技术来提高风电系统风能利用系数、捕获最优风能的控制方法进行了研究,并考虑和分析了尾流效应对风电系统风能利用系数的影响。在PSCAD/EMTDC中对异步风力发电系统在VSVF和常规恒速恒频(CSCF)2种方式下进行了建模、计算和对比分析。最后通过算例仿真进行了验证,结果表明采用新型运行方式可以有效提高异步风力发电系统的风能捕获能力。

Variable-speed variable-frequency （VSVF）, a new typed operational mode for the induction generator based wind power generation system is proposed based on the fractional frequency power transmission. A control method aimed at increasing efficiency and maximizing energy capture using the field orientation control （FOC） technology is introduced, considering the wake effects. Two types of wind power generation system i.e. VSVF and constant-speed constant-frequency （CSCF） system are modeled and analyzed. Simulation results with PSCAD/EMTDC demonstrate that the optimal power efficiency tracking and optimal wind power capturing can be achieved.