电力系统自动化2024，Vol.48Issue(13)：60-68,9.DOI:10.7500/AEPS20230603001
考虑频率二次跌落和转速恢复的风电机组柔性频率响应策略
Flexible Frequency Response Strategy for Wind Turbines Considering Secondary Frequency Drop and Rotational Speed Recovery
摘要
Abstract
The active frequency response capability of wind turbines has become a prerequisite for the wind power integration in the future,but the improper switching of control strategies between the frequency support stage and the speed recovery stage may cause a secondary frequency drop(SFD).Aiming at this problem,this paper proposes a flexible frequency response strategy for wind turbines.Firstly,the nonlinear model of wind turbines is linearized at the initial operation point,and the impact of the initial operation point on the output characteristics of wind turbines is analyzed.Secondly,based on the linearized model of wind turbines,the frequency response transfer function for the power system composed of wind power and thermal power is derived,and the impact of system parameters on the dynamic characteristics of frequency response is studied.Then,the contradiction between SFD and rotational speed recovery is studied,and a participation factor of auxiliary power is constructed by using piecewise function and Logistic function.The electromagnetic power output of the wind turbine is adjusted through shape coefficients.Finally,the comparative simulation study is conducted on the MATLAB/Simulink platform.Simulation results show that the proposed strategy can eliminate the SFD while guaranteeing a satisfactory rotational speed recovery.关键词
风电机组/频率响应/频率二次跌落/转速恢复Key words
wind turbine/frequency response/secondary frequency drop/rotational speed recovery引用本文复制引用
陶玉昆,杨飞飞,和萍,李从善,季玉琦..考虑频率二次跌落和转速恢复的风电机组柔性频率响应策略[J].电力系统自动化,2024,48(13):60-68,9.基金项目
河南省科技攻关项目(232102241015) （232102241015）
河南省自然科学基金资助项目(232300420420). This work is supported by Scientific and Technological Breakthrough Foundation of Henan Province(No.232102241015)and Henan Provincial Natural Science Foundation of China(No.232300420420). （232300420420）
