进一步提高准同步采样谐波分析准确度的两种方法

Methods for Improving the Accuracies of Quasi-synchronous Sampling Harmonics Analysis

本文在对准同步采样谐波分析法深入研究的基础上,提出了两种进一步提高测量准确度的方法。理论分析和实际应用(测量)表明,采用新的运算,不仅能有效地提高谐波分析(尤其是幅值小的谐波分量)的测量准确度,而且运算速度快、占内存少。文中还对测量误差作了分析和估计,并介绍了测量分数次谐波的一种方法。

In this paper,two methods for improving the accuracies of the quasi-synchronous sampling harmonics analysis are proposed.Using the new formulas,the measuring accuracies for harmonic components of periodic sign-als,especiaUy for the components with small amplitude,can be much impro-ved.The error estimation of the quasi-synchronous sampling harmonics anal-ysis and the method used for measuring the subharmonics of periodic signalsare also discussed.