Research on harmonic analysis of arc furnace electric system based on frequency domain method.

电弧炉电气系统谐波分析的频域方法研究。

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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.

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。

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It is necessary to improve the measuring precision of electric signal's base frequency, which directly influences the precision of its harmonic analysis.

由于电力信号基波频率的测量直接影响到谐波分析的精度，提高基波频率的测量精度非常必要。

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