Symmetrical Short Circuit Current Characteristics of Doubly Fed Induction Generator Wind Turbine with Crowbar Protection

Abstract:

Doubly fed induction generator (DFIG) is now becoming one of most widely used wind turbines in global market for wind power generation, due to its outstanding advantages. However, the DFIG is sensitive to grid faults. The DFIG will have to be removed from the grid if there’s no protection appliance in it. Therefore, the crowbar protection is widely used in the world for improving the low voltage ride-through ability of wind turbines. This paper analysed the operating characteristics and short-circuit current of DFIG under symmetrical short-circuit fault with respect to different sags to grid voltage, which on the basis of DFIG wind turbine with crowbar protection. And the expressions of short-circuit current under symmetrical short-circuit fault for DFIG were derived. The effectiveness of the expression was simulated in PSCAD/EMTDC.

• Periodical: Advanced Materials Research (Volumes 512-515)
• Pages: 782-787
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.512-515.782
• Online since: May 2012
• Authors: Jia Jun Zhai, Bu Han Zhang, Kui Wang, Wen Shao, Cheng Xiong Mao
• Keywords: Crowbar Protection, Double Fed Induction Generation (DFIG), Sag Depth, Short-Circuit Current

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