南方电网技术2025，Vol.19Issue(10)：38-46,9.DOI:10.13648/j.cnki.issn1674-0629.2025.10.004
基于超级电容器的改进双馈风机调频策略
Improved Frequency Modulation Strategy of DFIG Based on Supercapacitor
摘要
Abstract
The doubly-fed induction generator(DFIG)unit can obtain active power reserve by overspeed load shedding to participate in frequency modulation,but due to the minimum speed limit of DFIG,it may cause serious secondary frequency drop when speed is recovered.To solve this problem,a frequency modulation strategy is proposed based on bidirectional DC/DC converter and supercapacitor energy storage.Firstly,based on the traditional overspeed load shedding and frequency modulation principle of DFIG,the causes and consequences of secondary frequency drop are analyzed.Then,combined with the operation characteristics of the supercapacitor and the DFIG grid-side converter,the supercapacitor is connected in parallel to the DC bus of the DFIG back-to-back converter through the DC/DC converter interface,and the DFIG grid-side converter collaborates with the energy storage characteristics of the supercapacitor to participate in frequency modulation,effectively avoiding the secondary frequency drop and achieving good frequency modulation effect.Finally,the effectiveness and superiority of the proposed method are verified by simulation.关键词
双馈风机/超级电容器/调频/频率二次跌落/Buck-Boost变流器Key words
double-fed induction generator/supercapacitor/frequency modulation/secondary frequency drop/Buck-Boost converter分类
动力与电气工程引用本文复制引用
李志军,刘士杰,邱春阳,王雅欣..基于超级电容器的改进双馈风机调频策略[J].南方电网技术,2025,19(10):38-46,9.基金项目
国家自然科学基金资助项目(U20A201284). Supported by the National Natural Science Foundation of China(U20A201284). （U20A201284）
