Open AccessSpeed‐sensorless control for grid‐connected doubly fed induction generators based on virtual synchronous generator
Author(s) -
Zhao Yangyang,
Chai Jianyun,
Sun Xudong
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0832
Subject(s) - induction generator , control theory (sociology) , doubly fed electric machine , robustness (evolution) , computer science , vector control , wind power , grid , rotor (electric) , ac power , power (physics) , control engineering , engineering , control (management) , induction motor , physics , voltage , mathematics , electrical engineering , geometry , quantum mechanics , artificial intelligence , biochemistry , chemistry , gene
Positioning and speed sensors for doubly fed induction generators (DFIGs) often result in faults and excessive maintenance under harsh working conditions, to this end, a speed‐sensorless control for the DFIG wind turbines is investigated in this paper. As the relationship between the output active power of DFIG and the frequency of its rotor‐side converter can be established based on the virtual synchronous generator method, the DFIG can regulate its output power without the information of its rotor speed and position. Comparisons with the conventional vector control are assessed through dynamic analysis of slip frequency transfer functions. Simulation and experimental results are also provided to demonstrate the effectiveness and robustness of the proposed control method.