内模控制的并网型双馈电机风力发电系统  

DFIG Wind Power Generation System for Connected to Grid Based on Internal Model Control

作　　者：任永峰[1] 李含善[1] 安中全[2] 刘锦国[2] 刘海涛[2] 

机构地区：[1]内蒙古工业大学信息工程学院,呼和浩特010051 [2]内蒙古电力科学研究院,呼和浩特010020

出　　处：《高电压技术》2009年第5期1214-1219,共6页High Voltage Engineering

基　　金：内蒙古自治区自然科学基金重大项目(200711020801);内蒙古自治区自然科学基金(20080404MS0907;200607010809);内蒙古自治区高等学校科学研究项目(NJ05050)~~

摘　　要：交流励磁双馈式风电系统已成为变速恒频风力发电的主流。为提高存在较大扰动时系统的性能,在推导了发电机惯例下双馈电机的动态数学模型后提出用S函数描述双馈电机的数学模型,开发了基于状态方程的双馈电机空载运行和发电运行的子系统模型,设计了用内模控制策略实现转子电流内环和转速外环的控制,并通过基于定子磁链定向的解耦控制实现了有功和无功功率的解耦,然后在Matlab/Simulink环境下建立了完备的并网运行变速恒频双馈风力发电系统模型。针对850kW系统在转速变化和大电网扰动下的响应特性进行的仿真研究结果显示,提出的双馈式风电系统模型具有较好的控制性能和较快的动态响应速度。The AC-excited doubly-fed induction generator （DFIG） has become the one of main generators for variable speed constant frequency （VSCF） wind power generation systems. A detailed mathematical model of DFIG was derived according to generator convention. A novel S-funetion was proposed to describe the mathematics model of DFIG and simulate subsystems of no-load operation ,and generation operation were developed based on the state equation. The control of the rotor current inner loop and the rotating speed outer loop were designed based on Internal model control （IMC） strategies, respectively. The output active and reactive powers were decoupled based on stator-flux-oriented control. A full conneetion to grid VSCF DFIG wind power generation system model was developed based on mathematics model in Matlab development environment. The dynamic response behavior of a 850 kW for connection to grid system under various and large three-phase disturbance conditions at rotating speed was studied. The results demonstrate that the proposed simulation model has preferable control performance and dynamic response under various operation conditions.

关 键 词：双馈感应电机 内模控制 S函数 风力发电 柔性并网 建模 

分 类 号：TM614[电气工程—电力系统及自动化]