目前，电力谐波分析已经成为电力系统领域的一个重要研究方向。

Recently, harmonic analysis is an important area in the electric power system.

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提出了一种适于高精度实时电力谐波分析的自适应调整采样频率的电网频率跟踪算法。

An adaptive sampling frequency tracking algorithm which adapt to realization of precise real time harmonic analysis is introduced.

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快速傅里叶变换(FFT)是电力系统进行谐波分析的主要算法，但当输入信号中含有衰减直流分量时，FFT算法会产生较大的误差。

Fast Fourier transform (FFT) is the main algorithm for harmonic analysis in electric power system, but when there is the decaying DC component in input signal, FFT algorithm will have higher error.

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