鼠笼异步式风机的新型控制方法研究  

A novel control method of a squirrel cage asynchronous generator for a wind turbine

作　　者：吴璇 赵文彬 朱瑞 WU Xuan;ZHAO Wenbin;ZHU Rui(College of Electric Power Engineering,Shanghai University of Electric Power,Shanghai 200090,China;College of Mathematics and Science,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海电力大学电气工程学院,上海200090 [2]上海电力大学数理学院,上海200090

出　　处：《电力系统保护与控制》2023年第18期43-51,共9页Power System Protection and Control

基　　金：国家自然科学基金项目资助(12172210)。

摘　　要：针对目前鼠笼式异步风力发电机控制系统的缺点,提出了一种用于鼠笼式异步风力发电机组的新型控制方法,目的在于实现鼠笼式风机发电效率的最大化和系统成本的最小化。该控制方法的拓扑由电压源变流器(voltage source converter,VSC)、功率因数转换器(power factor correction converter,PFCC)和电容器组成,通过VSC为鼠笼式发电机提供励磁以实现最大功率跟踪控制,同时通过并联PFCC将发电机输出的全部有功功率传输至直流侧,使得VSC仅为发电机提供无功功率。并通过并联电容器补偿发电机所需无功功率以减小系统所需VSC的容量,从而最大程度地降低系统成本。同时,以提高机组效率为目的,通过分析确定了该机组的转差率和最佳电容器容量。在理论分析的基础上,基于Matlab软件对设计的控制系统进行仿真验证,仿真结果证明了该方法的可行性和控制方法的有效性。To address the shortcomings of the control system of conventional squirrel-cage asynchronous wind turbines,this paper proposes a new control method to achieve the research objectives of maximizing their power generation efficiency and minimizing the system cost.The topology of this control method consists of a voltage source converter(VSC),a power factor correction converter(PFCC)and capacitors.It functions by providing excitation for the squirrel-cage generator through the VSC to achieve maximum power point tracking(MPPT)control,and transferring all the active power output from the generator to the DC bus through the PFCC in parallel,so that the VSC only provides reactive power to the generator.The reactive power required by the generator is compensated by capacitors in parallel to reduce the VSC capacity required by the system,thus minimizing the system cost.To improve the efficiency of the system,it is analyzed to settle the slip rate and the optimal capacitor capacity of the system.Based on the theoretical analysis,a simulation verification of the designed control system has been performed based on Matlab software,and the simulation results have proved the feasibility of the design and the effectiveness of the control method.

关 键 词：风力发电 鼠笼式发电机 电压源变流器 功率因数转换器 最大功率跟踪控制 

分 类 号：TM614[电气工程—电力系统及自动化]