一种基于变速恒频的双馈风力发电MPPT设计

Control Strategy of Tracking the Maximum Wind Power of Variable Speed Constant Frequency Wind Turbine System Driven by Doubly Fed Induction Generator

采用双PWM控制型变流器,变速恒频发电技术,变浆距角进行最佳风能追踪(MPPT)控制。分析了如何由绕线式异步电动机参数设计出双馈风力发电最大风能跟踪控制的风力机参数。通过Matlab仿真,分析了风机的切入风速、切出风速、风速过大情况下的变桨距角控制及浆距角随风速减小而自动恢复的最大风能跟踪特性,验证了控制策略的有效性和可行性。

Track maximum wind power by adopting inverter controlled by double PWM driving,generating electricity by variable speed constant frequency,changing pitch angle.Analyze how to designing the wind turbine parameter of DFIG maximum wind power tracked by the winding type asynchronous motor parameter.Simulating by Matlab,Analyze wind turbine tracking characters such as cut-in wind speed,cut-out wind speed,controlling of variable pitch angle while too larger wind speed,and restoring the pitch angle while lower wind speed;Verified the effectiveness and feasibility of control strategy.