快速傅里叶算法在配网电能质量谐波智能监测中的应用  

Application of fast Fourier algorithm in intelligent monitoring of power quality harmonics in distribution network

作　　者：陈涛[1] 刘超[1] 蔡小鹏 CHEN Tao;LIU Chao;CAI Xiaopeng(School of Electrical information engineering,Jiangsu University,Zhenjiang 212013,Jiangsu China;State Grid Jiangsu Electric Power Co.,Ltd.,Danyang Power Supply Branch,Danyang 212300,Jiangsu China)

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013 [2]国网江苏省电力有限公司丹阳市供电分公司,江苏丹阳212300

出　　处：《粘接》2025年第3期142-145,共4页Adhesion

摘　　要：新型配电网运行时,主要利用基于小波变换的频域方法进行谐波智能监测,忽略了电能信号的时域特征,导致监测结果存在很大的相对误差。因此,提出基于快速傅里叶算法的新型配电网电能质量谐波智能监测研究。运用以DSP芯片的谐波测试装置,采集新型配电网电能质量谐波数据,并考虑A/D转换过程中存在的增益误差,对采集数据进行校正处理。依托于时域与频域相结合的思路,引入快速傅里叶算法和四谱线插值原理,对特征提取结果进一步检测,确定谐波信号的幅值和相位,得出电能质量谐波智能监测结果。结果表明:所提方法应用后得出的智能检测结果幅值、相位平均相对误差分别为10^(-6)%~10^(-8)%、10^(-8)%~10^(-10)%,且智能监测时间在10 ms以内。During the operation of the new distribution network,the frequency domain method based on wavelet transform is mainly used for harmonic intelligent monitoring,which ignores the time-domain characteristics of the electric energy signal,resulting in a large relative error in the monitoring results.Therefore,a new type of power quality harmonic intelligent monitoring of distribution network based on fast Fourier algorithm was proposed.The harmonic test device with DSP chip was used to collect the harmonic data of power quality of the new distribution network,and the gain error in the A/D conversion process was considered to correct the collected data.Relying on the idea of combining time domain and frequency domain,the fast Fourier algorithm and the four-spectral line interpolation principle were introduced to further detect the feature extraction results,determine the amplitude and phase of the harmonic signal,and obtain the intelligent monitoring results of power quality harmonics.The results showed that the amplitude and phase average relative errors of the intelligent detection results obtained by the proposed method were 10^(-6)%~10^(-8)%and 10^(-8)%~10^(-10)%,respectively,and the intelligent monitoring time was within 10 ms.

关 键 词：快速傅里叶算法 配电网 电能质量 谐波 数据特征 监测 

分 类 号：TM711.1[电气工程—电力系统及自动化] TP274[自动化与计算机技术—检测技术与自动化装置]