ZHAO X L, YAO Y P, FU B.Fuzzy adaptive auxiliary frequency modulation strategy for DFIG considering wind power uncertainty[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(1):124-132.

doi:10.16186/j.cnki.1673-9787.2021070025

Received:2021/07/06

Revised:2021/09/13

Published:2023/01/25

Fuzzy adaptive auxiliary frequency modulation strategy for DFIG considering 

wind power uncertainty

ZHAO Xilin, YAO Yepei, FU Bo

School of Electrical＆Electronic Engineering，Hubei University of Technology，Wuhan 430068，Hubei，China

Abstract:The inertia of the system is reduced by connecting wind power to the grid.With the increase of wind power penetration，the negative impact of the lack of inertia on the stability of the system frequency becomes more and more obvious，how to control the output of the wind turbine to assist the frequency adjustment of the power grid becomes an urgent problem to be solved.Firstly，the dynamic process of extracting the kinetic energy of the rotor of the doubly-fed induction generator（DFIG） was analyzed，and a comprehensive inertia control model of virtual inertia and virtual droop was constructed to control its participation in system frequency modulation.Secondly，the influence of frequency deviation，wind speed and permeability on the extraction of kinetic energy of the rotor and its correlation with comprehensive inertia control coefficient were analyzed.A fuzzy adaptive parameter dynamic adjustment strategy was proposed，so that the wind turbine could comprehensively consider the system frequency change and the uncertainty of wind power，so as to adaptively adjust the inertia control coefficient to obtain more precise frequency modulation power compensation.Finally，the feasibility and effectiveness of the proposed method were verified through simulation.

Key words:wind power;doubly-fed induction generator;load frequency control;fuzzy adaptive;uncertainty

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