电力系统自动化2026，Vol.50Issue(12)：119-133,15.DOI:10.7500/AEPS20250515005
滑窗傅里叶-锁频式混合宽频振荡快速检测方法
Fast Detection Method for Wideband Oscillations Based on Hybrid Sliding-window Fourier and Frequency-locked Algorithm
摘要
Abstract
Driven by the goals of carbon emission peak and carbon neutrality,the large-scale integration of power electronic-based renewable energy has significantly enhanced the dynamic response speed of the new power system,while concurrently increasing the risk of wideband oscillations.To effectively suppress the oscillations,there is an urgent need for fast,efficient,and precise detection of wideband oscillations.However,the existing detection algorithms struggle to simultaneously achieve rapidity,efficiency,and accuracy.Therefore,this paper proposes a fast detection method for wideband oscillations based on the hybrid sliding-window Fourier and frequency-locked algorithm,which incorporates the rapidity of the Fourier algorithm and the accuracy of the frequency-locked algorithm.Firstly,based on the instantaneous power theory,the voltage and current signals are converted into power signals,and the dual-frequency oscillation caused by frequency coupling is converted into a single-frequency oscillation.Secondly,the power signal is divided into low and high frequency bands to avoid mutual interference of signals during detection.For each frequency band,a single low-resolution sliding-window Fourier algorithm and a frequency-division sliding-window Fourier algorithm are employed to quickly obtain the approximate frequency and amplitude of the oscillation signal while significantly reducing the computational burden.Then,the approximate frequency is used as the center frequency of the phase-locked loop,and the oscillation amplitude is used as the trigger threshold of the phase-locked loop,so as to quickly lock the real frequency of the oscillation,and the detection time is consistently within 10 ms.Finally,the effectiveness of the method is verified by MATLAB/Simulink electromagnetic transient simulation and hardware-in-the-loop experiments.关键词
新型电力系统/宽频振荡/振荡检测/频率耦合/傅里叶变换/锁相环Key words
new power system/wideband oscillation/oscillation detection/frequency coupling/Fourier transform/phase-locked loop引用本文复制引用
陈伟,季柯,刘崇茹,韩民晓,梅念..滑窗傅里叶-锁频式混合宽频振荡快速检测方法[J].电力系统自动化,2026,50(12):119-133,15.基金项目
北京市自然科学基金资助项目(面上项目)(3252023) （面上项目）
中国科协青年人才托举工程资助项目(2024QNRC001) （2024QNRC001）
智能电网国家科技重大专项资助项目(2024ZD0800200). This work is supported by Beijing Natural Science Foundation of China(No.3252023),Young Elite Scientists Sponsorship Program by CAST(No.2024QNRC001),and Smart Grid-National Science and Technology Major Project of China(No.2024ZD0800200). （2024ZD0800200）
