Electric Power ›› 2016, Vol. 49 ›› Issue (3): 141-147.DOI: 10.11930/j.issn.1004-9649.2016.03.141.07

• New Energy • Previous Articles     Next Articles

Integrated Control Strategy for Low Voltage Ride Through of DFIG Involved in the Regulation

LI Fengting1, ZHANG Qian1, HUANG Rong2, HE Shi’en2   

  1. 1. Electrical Engineering College, Xinjiang University, Urumqi 830047, China;
    2. Wind Power Technology Center, Gansu Electric Power Corporation, Lanzhou 730050, China
  • Received:2016-01-04 Online:2016-03-20 Published:2016-04-08
  • Supported by:
    This work is supported by National Natural Science Foundation of China (No. 51267019, 51467019).

Abstract: Based on the analysis of the current situation and the weakness of the low voltage ride through technology of the doubly-fed induction generator, an integrated control strategy that the wind turbine is involved in the regulation is proposed, which can adapt to different Voltage Dips. In the proposed control strategy, the crowbar circuit is replaced by DC-Chopper and the dynamic braking resistor; variable power factor reactive power compensation is provided by the grid side converter based on different Voltage Dips to enhance the stability of the wind turbine after fault ride-through. The dynamic reactive power compensation device-based MCR(MSVC) is used to reduce cost. The model is built to testify the correctness and validity of the proposed control method. Simulation results show that the method better adapts to different Voltage Dips, achieving the capability of low voltage ride through, and enhancing the stability of the unit after fault ride-through in the meanwhile.

Key words: double-fed wind turbines, low voltage ride through, integrated control strategy, variable power factor control

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