摘要
为满足在电网发生故障时风电机组需保持与电网连接并向系统不间断供电的要求,提出了双馈风力发电机的动态模型、变流器模型、变流器保护及电网模型,以研究双馈风力发电机的暂态特性.以1.5 MW SUT-1500双馈风力发电机为原型,由一个无穷大电源等效电网模型,变流器模型采用定子磁链的定向电流矢量控制方法,利用PSCAD软件对双馈电机的暂态特性进行仿真.仿真结果表明,矢量控制能够实现双馈电机的有功、无功解耦,并可改善系统的低压穿越能力.
For the requirement to keep the connection of wind turbines with power grid and to supply continuously power to the system when the power grid fault occurs, the dynamic model, converter model, converter protection and grid model of doubly-fed induction generator （DFIG） were proposed to study the transient characteristic of the DFIG. A 1.5 MW SUT-1500 doubly-fed wind turbine was selected as the prototype, an infinite voltage source was taken as the equivalent power grid model, and the directional current vector control of stator flux was adopted in converter model. The transient characteristic of DFIG was simulated by PSCAD software. The simulation results show that the vector control can realize the active and reactive decoupled control of DFIG and improve the low voltage ride through （LVRT） capacity of the system.
出处
《沈阳工业大学学报》
EI
CAS
2009年第3期271-276,共6页
Journal of Shenyang University of Technology
基金
国家863计划资助项目(2003AA512020)
关键词
双馈感应电机
动态模型
变流器
矢量控制
解耦控制
电网故障
低电压穿越
PSCAD软件
doubly-fed induction generator
dynamic model
converter
vector control
decoupled control
power grid fault
low voltage ride through
PSCAD software
