Application of FFT Interpolation Correction Algorithm Based on Window Function in Power Harmonic Analysis

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Lai, Zengqiang^1 ; Xiao, Zhihong^2 ; Zhang, Guoqing^1 ; Wang, Guizhong^3 ; Liu, Ying^2 ; Shen, Hongming^2 ; Gao, Xu^4

Department of Electrical Engineering Harbin Institute of Technology, Harbin, China^1

State Grid Economic and Technological Research Institution, Beijing, China^2

Industrial and Technological Research Institute of HIT (Zhangjiakou), Zhangjiakou, China^3

State Grid JIBEI Electric Power Company, Beijing, China^4

关键词: Amplitude errors;    Blackman-Harris window;    Correction algorithms;    Harmonic measurements;    Nonsynchronous sampling;    Nuttall window function;    Power harmonics;    Window functions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/3/032184/pdf
DOI  :  10.1088/1755-1315/252/3/032184

来源: IOP

【 摘 要 】

In the power harmonic detection algorithm, the disadvantages of Fast Fourier Transform (FFT) are difficult to accurately detect in non-synchronous sampling and non-integer periodic truncation to need be solved. Therefore, this paper considers various advantages and disadvantages of traditional window functions such as Hanning window and new window function, for example: Blackman-Harris window and Nuttall window. Four three-order Nuttall window functions was adopted, which are more suitable for power harmonic analysis. Meanwhile, the double-line interpolation analysis and algorithm correction of the Nuttall window function are carried out. Finally, the algorithm is compared and simulated. By using this algorithm the phase error is stable at 0.00001°, and the amplitude error is almost 0, which fully meets the requirements of harmonic measurement standards.