电力系统谐波分析的高精度FFT算法  

FFT ALGORITHM WITH HIGH ACCURACY FOR HARMONIC ANALYSIS IN POWER SYSTEM

作　　者：张伏生[1] 耿中行[2] 葛耀中[1] 

机构地区：[1]西安交通大学电力工程系 [2]空军装备技术部第一研究所

出　　处：《中国电机工程学报》1999年第3期63-66,共4页Proceedings of the CSEE

摘　　要：快速傅立叶变换存在较大的误差，无法直接用于电力系统谐波分析。本文对ＦＦＴ的泄漏误差进行了分析，根据Ｊａｉｎ和Ｇｒａｎｄｋｅ提出的插值算法提出了多项余弦窗插值的新算法，对ＦＦＴ的结果进行修正，极大地提高了计算精度，使之适用于电力系统的准确谐波分析。文中给出了该算法进行谐波分析模拟计算的算例，计算结果表明，不同的加窗算法计算精度不同，新算法的计算精度显著提高。The FFT has a higher error in the harmonic analysis of the electric power system, especially for the phases. This paper discussed the leakage of FFT and presented a new amending algorithm, poly-cosin window interpolation, which based on the interpolating algorithm proposed by K. Jain and T. Grandke. This new algorithm obviously improves the accuracy of the FFT, so it can be applied to the precision analysis for electrical harmonic. The simulating result shows that applying deferent windows has the deferent effects to the accuracy, and the Blackman-Harris window has the highest accuracy.

关 键 词：电力系统 谐波分析 FFT算法 精度 

分 类 号：TM712[电气工程—电力系统及自动化]