现代电子技术2017，Vol.40Issue(1)：111-114,4.DOI:10.16652/j.issn.1004-373x.2017.01.031
基于DFT及谐波群泄露能量最小的电力谐波/间谐波分析方法
Power harmonic and interharmonic analysis method based on DFT and least harmonic group leakage energy
摘要
Abstract
The discrete Fourier transform(DFT)is widely used in the harmonic analysis of the power system,in which the non?complete?period sampling will lead to the spectrum leakage,aliasing and picket?fence effect. On the basis of energy conser?vation principle,when the energy of the complete period is focused on the main frequency,the leakage will be small. The RMS of group harmonic was defined by IEC61000?4?7. The method of using the variety of sampling points and recursive DFT is adop?ted to calculate the leakage energy of the fundamental?wave group harmonic and make it to the minimum,and obtain the sam?pling effect nearest to the complete period. The information of each harmonic is obtained by means of DFT. The numerical simu?lation results show that the method can calculate the fundamental wave,harmonic frequency,amplitude and phase accurately, and is still effective while the white noise exiting in the signal.关键词
谐波分析/递归DFT/泄露能量最小/频谱泄露Key words
harmonic analysis/recursive DFT/least leakage energy/spectrum leakage分类
信息技术与安全科学引用本文复制引用
慕昆,马小雨,何国锋..基于DFT及谐波群泄露能量最小的电力谐波/间谐波分析方法[J].现代电子技术,2017,40(1):111-114,4.基金项目
国家自然科学基金项目（61503122）；河南城建学院基金资助项目（2015JBS009）；高等学校博士学科点专项科研基金（20124101120001）；中国博士后科学基金（2013M541992）；河南省博士后基金（2013073）；河南省教育厅科学技术研究重点项目 （）
