Main and auxiliary control strategies of DFIG under asymmetrical grid voltage dips

3rd International Conference on Energy Engineering and Environmental Protection

能源学;生态环境科学

Wang, Jing^1

China Datang Corp. Sci. and Technol. Res. Inst. Co.LTD E. China Elec. Pwr. Test and Res. Institute, Hefei

230022, China^1

关键词: Auxiliary control;    Control strategies;    Doubly fed induction generators;    Matlab simulations;    Negative sequence components;    Rotor-side converter;    Uninterrupted operations;    Wind turbine modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/227/3/032040/pdf
DOI  :  10.1088/1755-1315/227/3/032040

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

When the Doubly Fed Induction Generator (DFIG) asymmetrical dips in the grid, the stator current will not only generate transient DC components, but also generate negative sequence components, especially when the motor impedance is small. The negative sequence component is larger, which will further deteriorate the grid voltage. In this paper, the DFIG is taken as the research object. When the grid is unbalanced, the main and auxiliary control strategies are adopted for the rotor-side converter, which can control the rotor current quickly and effectively, and improve the uninterrupted operation of the entire wind turbine. The MATLAB simulation software was used to simulate the 1.5MW wind turbine model, and the test was carried out on the 1.5MW wind turbine test bench. The simulation results and test results verify the feasibility and effectiveness of the control strategy.