双馈系统在电网故障下不间断运行的研究  

Study on uninterruptable operation of doubly fed induction generators during a voltage dip in the grid

作　　者：杜韦辰[1] 曹正[2] 

机构地区：[1]兰州石化职业技术学院电子电气工程系,甘肃兰州730060 [2]兰州理工大学电气工程与信息工程学院,甘肃兰州730050

出　　处：《电子技术应用》2012年第8期63-65,72,共4页Application of Electronic Technique

基　　金：2010年度甘肃省教育厅科研项目(1015B-02)

摘　　要：为更好地研究风力发电机在一定的电网电压跌落故障下的动态响应,以单台1.5 MW双馈风力发电机(DFIG)为研究对象,设计了Crowbar电路,通过构建电网电压跌落仿真模型,分别对机端电压、电流、转子电流、输出的有功功率和无功功率、直流侧电压、电磁转矩在故障期间的动态响应进行了仿真。探讨了相应的控制策略,为进一步研究低电压穿越标准下的控制策略提供了依据,同时也为研制兆瓦级变频器打下基础。测量结果表明这种控制方式能使DFIG在电压跌落故障下实现不间断运行,有效提高了DFIG风电机组运行的可靠性。To research the dynamic response of wind power generation unit under certain grid voltage sag in depth, taking single doubly-fed induction generator （DFIG） with capacity of 1.5 MW, and design Crowbar circuit by means of building simulation models of grid voltage sag, the dynamic responses of terminal voltage, stator current, rotor current, active power output and reactive power output, voltage at DC side and electromagnetic torque during the fault are simulated respectively. Through the simulation results, corresponding control strategies, which are available for reference to further research on control strategy based on the standard of LVRT, are investigated, as well as researching foundation of inverter in MW level.

关 键 词：双馈感应发电机 电压跌落 CROWBAR电路 低电压穿越 

分 类 号：TM711[电气工程—电力系统及自动化] TM614