华电技术 ›› 2015, Vol. 37 ›› Issue (6): 25-27.

• 研究与开发 • 上一篇    下一篇

双馈风机低电压穿越研究

  

  1. 台州电业局 输电运检工区,浙江临海〓317000
  • 出版日期:2015-06-25 发布日期:2015-10-08

Study on low voltage ridethrough technology for DFIG

  1. Transmission Operation and Maintenance Work Area, Taizhou Electric Power Bureau, Linhai 317000, China
  • Online:2015-06-25 Published:2015-10-08

摘要:

摘要:低电压穿越已经成为双馈风机大规模并网的一个瓶颈。建立了双馈风机的数学模型,分析了电网电压骤降对双馈风机产生的影响,提出将双馈风机直流侧电容通过双向并联的二极管与太阳能发电站直接相连,以提高双馈风机低电压穿越的能力,进而增强电网电压的稳定性。仿真结果表明,使用该方法可以达到预期目标。

关键词: 关键词:双馈风机, 低电压穿越, 双向并联二极管, 太阳能发电站, 稳定性

Abstract:

Abstract:The low voltage ridethrough becomes a bottleneck to restrict DFIG to connect into grid in large scale. The mathematic model of DFIG was established. The influence of grid voltage rapid dip on DFIG was analyzed. An improvement method was proposed, in which the DC side capacitor of DFIG is connected directly with a solar power station by bidirection parallelconnected diodes. The LVRT capability of DFIG can be enhanced by the method, and the stability of the grid voltage will be improved. The simulation result shows that the expected target can be realized using the method.

Key words: Keywords:doubly fed induction generator (DFIG), low voltage ridethrough (LVRT), bidirection parallelconnected diodes, solar power station, stability