近年来,随着大量电力电子元件及其它非线性设备的使用,使得电网谐波污染严重恶化,已经影响到用电设备,谐波问题已经与电磁干扰、功率因数降低并列为电力系统中的三大公害.ADE7878作为三相电能表测量IC,因其精度高、使用灵活而在电网信号分析中得到广泛应用,但由于采样间隔设置上的缺陷,其在谐波分析中存在明显不足.针对这个问题,本文提出一种加权截取及样条插值的电力系统谐波快速分析方法,在保证计算精度的前提下,提高了效率,实验证明最终的谐波分析结果正确.%In recent years, with the use of a large number of power electronic components and other nonlinear devices, the harmonic pollution has affected the serious deterioration, which has affects the electrical equipment. The harmonic problem has become the three major pollutions in the power system with electromagnetic interference and power factor reduction. As a three-phase electric energy meter measurement, ADE7878 is widely used in the power grid signal analysis because of its high precision and flexible method. However, due to the defects of the sampling interval, there are obvious deficiencies in harmonic analysis. Aimed at this problem, this paper proposes a rapid analysis method for power system harmonic based on the weighted interception and spline interpolation. It can ensure the accuracy and improve the efficiency. The final experiment proves that the harmonic analysis results are correct.
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