带有备用电源的双馈异步发电机系统

DFIG System Equipped Backup Source

针对传统结构的双馈异步发电机系统在应对电网电压突降故障方面的缺陷,提出在原系统结构的基础上增加一个备用电源,以增大系统应对电网电压突降的能力。理论分析表明,带有备用电源的双馈异步发电机系统在电网电压突降时能够采取强励措施,有利于稳定电机转速和电网电压,从而可以对电网的安全承担更大的责任。

With respect to the shortage of a traditional DFIG dealing with grid voltage sag, this article proposes that a backup source should be added to the traditional DFIG in order to enhance the ability of dealing with grid voltage sag. Theoretical analysis shows that a DFIG equipped backup source can stabilize the generator and the grid voltage when grid voltage sag happens through increasing force current. It also shows that a DFIG equipped backup source is able to play a more important role in protecting grid against default.