非相干采样中有功功率估计的比较研究

D. Agrez
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引用次数: 8

摘要

本文介绍并比较了在非相干采样条件下产生泄漏效应时电力系统有功功率估计的三种基本方法。研究了采用平滑求和法的正常时域方法和采用改进内插DFT估计参数的两种频域方法的系统误差和泄漏抑制效果。仿真结果显示了比较方法在缩短测量时间方面的优缺点:测量周期在1 ~ 6个周期之间。通过分析和实验可以得出,当直流偏置分量足够小时,对零分量附近的DFT系数进行平均可以得到最佳的有功功率估计
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Active Power Estimation in the Non-coherent Sampling: A Comparative Study
The paper presents and compares three basic approaches of the active power estimation of electrical systems under noncoherent sampling conditions when the leakage effect arises. The properties of the normal time domain approach with smoothing and summation and two frequency domain approaches with improved interpolated DFT estimations of the parameters are studied with respect to their systematic errors and effectiveness in leakage suppression. The simulations are presented showing advantages and weaknesses of compared methods in the shortening measurement time: between one and six cycles in the measurement interval. From analysis and experiments, it can be deduced that averaging of DFT coefficients around zero component provides the best estimation of the active power when the DC offset component is small enough
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