Control of doubly-fed wind power generation converter under unbalanced grid voltage
LEI Wei-min
MIAO You-zhong
LUO Wei
XU Yan-sheng
AI Bing
Abstract：Aiming at the safety and stability problems caused by the double frequency harmonic components of output power of doubly-fed wind power generation system under the unbalanced three-phase grid voltage condition, a positive and negative sequence double closed loop current control strategy, where the control target is to eliminate the double frequency harmonic components, was proposed. The mathematical model for the grid-side converter of doubly-fed wind power generation system under unbalanced condition was established, and the generation mechanism of double frequency harmonic components was analyzed. In addition, the positive and negative sequence components were separated with the 1/4 cycle delay method, and the positive and negative sequence currents were separately involved in the operation control to counteract the double frequency power components. Moreover, the simulation system was established with the Matlab/Simulink software. The simulated results verify the correctness of theoretical analysis and the effectiveness of proposed control strategy.
Keywords：doubly-fed wind power generationvoltage unbalancedouble frequencygrid-side convertermathematical modelpositive and negative sequence separationcurrent double closed loopsimulation
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 612-616 )