不平衡电网电压下风力发电机网侧变流器控制研究  

Research on grid-side converter control of wind turbines with unbalanced grid voltage

作　　者：张树基 罗映红[1] 王云 赵腾跃 Zhang Shuji;Luo Yinghong;Wang Yun;Zhao Tengyue(School of Automation & Electrical Engineering, Lanzhou Jiao Tong University, Lanzhou 730070,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,兰州730070

出　　处：《电测与仪表》2019年第9期81-85,共5页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51767015)

摘　　要：针对电网电压不平衡下风力发电机网侧变流器的控制问题,提出一种基于比例积分谐振(Proportional Integrate Resonant,PIR)控制器的矢量控制方法。以双馈风力发电机为研究对象,建立了它及其网侧变流器在不平衡电网电压条件下的数学模型,并分析了其工作原理和相关控制关系。介绍了谐振控制器的工作原理,建立数学模型,进行参数设计,并在MATLAB中进行验证。在MATLAB仿真平台中搭建了一台6 MW的双馈电机模型,验证了谐振控制器能够准确的控制网侧变流器跟踪电网电压,有助于双馈电机的平稳运行。Aiming at grid-side converter control problem of wind turbine under unbalanced grid voltage, a vector control method based on proportional integral resonance (PIR) controller is proposed in this paper. This paper establishes a mathematical model of doubly-fed wind generators and their grid-side converters under unbalanced grid voltage conditions, and analyzes its working principle and control relationships. This paper introduces the working principle of the resonant controller, establishes its mathematical model, and designs the parameters of resonant controller. And the simulations are conducted in MATLAB. A 6 MW doubly-fed motor model was built in the MATLAB simulation platform, which verified that the resonant controller can accurately control the grid-side converter tracking grid voltage, and is helpful for the smooth operation of the doubly-fed motor.

关 键 词：电网电压不平衡 比例积分谐振控制器 双馈风力发电机 网侧变流器 

分 类 号：TM614[电气工程—电力系统及自动化]