The Strategy of Doubly-fed Induction Generator Low-voltage ride-through Based an Integrated Protection Circuit

2019 4th Asia Conference on Power and Electrical Engineering

能源学;电工学

Wang, Xiangming^1^2 ; Zhang, Huijuan^1^2 ; Zhang, Qinrui^1^2

State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin, China^1

Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology, Tianjin, China^2

关键词: Crow-bar circuit;    Doubly fed induction generator (DFIG);    Doubly fed induction generators;    Dynamic resistance;    Integrated protection;    Low-voltage ride-through;    Protection circuits;    Transient current;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/486/1/012134/pdf
DOI  :  10.1088/1757-899X/486/1/012134

来源: IOP

【 摘 要 】

Aiming at the shortcomings of single-protection circuit in the low-voltage ride-through (LVRT) process of doubly-fed induction generators (DFIG), this paper proposes an integrated protection circuit strategy for LVRT of DFIG based super-capacitor(SC). The integrated protection circuit includes a Crowbar circuit, a rotor series dynamic resistance (SDR) and SC. By adopting different protection circuits in different situations and time divisions, the LVRT capability of the DFIG is comprehensively improved, and the transient current of the rotor current during the protection circuit input is analyzed in each case. Finally, the proposed integrated protection circuit strategy is compared with the traditional single Crowbar circuit and single SDR on the simulation platform MATLAB/Simulink. The simulation results demonstrate the effectiveness of the proposed integrated protection circuit strategy.