变速恒频双馈风力发电最大功率跟踪控制

摘要

为了充分有效地利用风能，发出较高的电能质量，在分析了风力机最大风能捕获机理和双馈电机数学模型基础上，提出了一种基于定子电压定向下变速恒频双馈发电机最大功率跟踪矢量控制策略。为了说明控制策略的有效性，在风速阶跃变化下，利用 Simulink 建立了双馈发电系统仿真模型及定子电压定向矢量控制模型。仿真结果表明，该控制策略能够快速准确控制风力发电系统进行最大功率跟踪及变速恒频控制。%To utilize the wind energy fully and effectively,improve electricity output quality,the mechanism of wind turbine capture maximum wind energy and the mathematical model of doubly fed generator are analyzed.On that basis,the control-ling strategy of maximum power tracking under stator voltage oriented is derived.To illustrate the effectiveness of the control strategy,Simulink is used to build the model of maxi mum power track-ing control under step wind speeds.Simulation re-sults show that the control strategy can control the wind power generation system for maximum power point tracking and variable speed constant frequen-cy quickly and accurately.