交流励磁变速恒频风力发电机空载并网研究  

Idle Load Grid-connection of AC-excited Variable-speed Constant-frequency Wind Power Generator

作　　者：郭凤仪[1] 石立志[1] 

机构地区：[1]辽宁工程技术大学电气与控制工程学院,辽宁葫芦岛125105

出　　处：《电力电子技术》2011年第10期57-59,共3页Power Electronics

摘　　要：随着风电机组单机容量的不断增大,发电机并网时的电流冲击已不能忽视,必须对并网控制技术进行深入研究。此处探讨了交流励磁变速恒频(AC-excited Variable-speed Constant-frequency,简称AEVSCF)风力发电系统的运行原理,研究了AEVSCF风力发电机与电网间的连接特性,即可通过励磁控制调节发电机输出以满足并网条件。建立了双馈异步发电机(DFIG)在d,q坐标系下的数学模型,并采用定子磁链定向方式,推导了DFIG空载并网控制策略。最后通过并网控制实验验证了AEVSCF风力发电机建模及控制的正确性与有效性。With the increasing capacity of wind power generators, the current impact on grid connection can not be ignored ,thus the grid connection techniques should be investigated in depth.This paper discusses the function principle of AC-exited variable-speed constant-frequency（VSCF） wind power generation system and the characteristics of connection between AC-excited VSCF wind power generator and grid are analyzed to make generator output voltage meet grid-connection condition by excitation control.The dynamic mathematical model of VSCF double-fed induction generator（DFIG） in d,q coordinate system is established,stator flux orientation is adopted to deduce no-load grid-connection control strategy of DFIG.Grid-connection control is studied by the experiment.The experimental results verify the correctness and validity of the modeling and control of AC-exited VSCF wind power generator.

关 键 词：风力发电机 变速恒频 交流励磁 定子磁链定向 

分 类 号：TM315[电气工程—电机]