Improved control strategy for PI-R current of DFIG considering voltage and current harmonics compensation

2016 International Conference on New Energy and Future Energy System

Song, S.Y.^1 ; Liu, Q.H.^1 ; Zhao, Y.N.^1 ; Liu, S.Y.^1

North China Electric Power University, State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, Beijing

102206, China^1

关键词: Control performance;    Control strategies;    Control technologies;    Decoupling controls;    Doubly Fed Induction generators (DFIG);    Harmonic currents;    Integration issues;    Voltage and current harmonics compensation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/40/1/012025/pdf
DOI  :  10.1088/1755-1315/40/1/012025

来源: IOP

【 摘 要 】

With the rapid development of wind power generation, the related research of wind power control and integration issues has attracted much attention, and the focus of the research are shifting away from the ideal power grid environment to the actual power grid environment. As the main stream wind turbine generator, a doubly-fed induction generator (DFIG) is connected to the power grid directly by its stator, so it is particularly sensitive to the power grid. This paper studies the improvement of DFIG control technology in the power grid harmonic environment. Based on the DFIG dynamic model considering the power grid harmonic environment, this paper introduces the shortcomings of the common control strategy of DFIG, and puts forward the enhanced method. The decoupling control of the system is realized by compensating the coupling between the rotor harmonic voltage and harmonic current, improving the control performance. In addition, the simulation experiments on PSCAD/EMTDC are carried out to verify the correctness and effectiveness of the improved scheme.