电力系统保护与控制2024，Vol.52Issue(24)：44-52,9.DOI:10.19783/j.cnki.pspc.240592
计及频率偏移和谐波干扰的谐波相量估计方法
Harmonic phasor estimation method considering frequency deviation and harmonic interference
摘要
Abstract
There are problems of poor anti-interference capability and significant measurement accuracy degradation under frequency offset of the harmonic estimation algorithm based on the discrete Fourier transform(DFT).To address this issue,a harmonic phasor estimation method considering frequency deviation and harmonic interference is proposed.First,parameter information on the fundamental phasor is accurately obtained by a filter bank and an interpolated discrete Fourier transform(IpDFT)algorithm.Then,the passband center of the filter bank is corrected based on the fundamental frequency offset and uses the corrected filter bank and IpDFT to obtain the initial estimation of the harmonic phasors.Finally,the initial estimation of the IpDFT is corrected by amplitude and phase compensation to achieve accurate harmonic phasor estimation.Simulation results demonstrate that the proposed method can provide a frequency error below 5 mHz and a total vector error below 1%for all harmonic phasors from the first to the fiftieth order in various scenarios including frequency offset,harmonic distortion,noise interference,and multiple disturbances,based on the IEC 60255-118-1 standard.关键词
谐波相量估计/频率偏移/谐波干扰/自适应带通滤波器组/插值离散傅里叶变换Key words
harmonic phasor estimation/frequency deviation/harmonic interference/adaptive bandpass filter bank/interpolated discrete Fourier transform引用本文复制引用
聂欣昊,唐文虎,李杰,王钢..计及频率偏移和谐波干扰的谐波相量估计方法[J].电力系统保护与控制,2024,52(24):44-52,9.基金项目
This work is supported by the National Natural Science Foundation of China(No.51977082). 国家自然科学基金项目资助(51977082) （No.51977082）
广州市科技计划项目资助(2023A04J1589) （2023A04J1589）
