ABSTRACT
When using fast Fourier transform to analyze harmonics, it is difficult to realize high precision harmonic detection due to the spectrum leakage and fence effect caused by asynchronous sampling. In this paper, a combined optimization algorithm is proposed. By analyzing the characteristics of the self-convoluted window, the self-convolution window six-spectrum-line interpolation algorithm is proposed to estimate the amplitude and frequency parameters of harmonics. Meanwhile, an improved all-phase FFT algorithm is proposed to estimate harmonic phase parameters, considering the fact that the data before zero hour can not be collected. Finally, through simulation experiments, the proposed algorithm is compared with other algorithms in the case of classical harmonic signals and noise. The results show that the algorithm has higher harmonic detection accuracy and stronger anti-noise capability.
- Ren, BY, Sun KG and Ma BH. 2019.Harmonic Current Sharing Strategy in Islanding Microgrid Based on Adaptive Virtual Harmonic Impedance Control. Power System Technology (May 2019), 2592-2600.Google Scholar
- Zhang, Y, Peng, ZW and Lei, ZY. 2019. Harmonic Source Hazard and Harmonic Detection Technology in Microgrid. Power System and Clean Energy (June 2017), 27-35.Google Scholar
- Wang, B.S., Xiao, X. 2018. A High Accuracy Multi-Spectrum-Line Interpolation Algorithm for Harmonic Analysis. Transactions of China Electrotechnical Society,33: 553-562.Google Scholar
- Li, Z.G., Quan, F. 2014.Power system harmonic detection based on Hamming windowed FFT and wavelet packet transform. Journal of Electric Power Science and Technology,29:76-81.Google Scholar
- Qing, B.Y., Teng, Z.S., Gao, Y.P., Wen, H. 2008. An Approach for Electrical Harmonic Analysis Based on Nuttall Window Double-spectrum-line Interpolation FFT. Proceedings of the CSEE,29: 76-81.Google Scholar
- Yin, G.M., Chen, K.X., Gao, Y.P., Zhang Y.Q., Yu, L.G., Wang, Y., 2019. Flicker parameters detection using the Teager-Kaiser energy operator based on Blackman-Harris window and triple spectrum line interpolation. Electrical Measurement & Instrumentation,56: 8-14.Google Scholar
- Xue, P., Wang, Y.B., Yao, J., Zou, X.Z., Gao, M. 2018.Harmonic Analysis of Power System Based on Kaiser Window Four-spectrum-line Interpolation FFT. Journal of Harbin University of Science and Technology, 23: 53-57.Google Scholar
- Hao, Z., Gu, W., Chu, J.X., 2014. A power network harmonic detection method based on the four-spectrum-line interpolation FFT. Power System Protection and Control, 2014,42:107-113.Google Scholar
- Tao, S., Guo, A., Zhao, L., 2019. Harmonic Detection Method of Inter⁃harmonics Based on Six Term Window Functions with Maximum Side Lobe Decay Speed and Six⁃spectrum⁃line Interpolation Algorithm. Power Capacitor & Reactive Power Compensation,40:110-116.Google Scholar
- Hua, M., Chen J.Y. 2019. A high precision approach for harmonic and interharmonic analysis based on six-spectrum-line interpolation FFT. Power System Protection and Control, 47: 9-15.Google Scholar
- Liu, Q.C., Cao, M., Li, B., 2017. A method of harmonic reactive power measurement based on Hanning self-convolution window and triple-spectrum-line interpolation. Electrical Measurement & Instrumentation,54:82-86.Google Scholar
- Zeng, B., Tang, Q., Qing, B.Y., 2014. Spectral Analysis Method Based on Improved FFT by Nuttall Self-Convolution Window. Transactions of China Electrotechnical Societ,29:59-65.Google Scholar
- Zhang, Q., Wang, H.Y., Wang, W.Q. 2020. A new combined optimization harmonic analysis method. Power System Protection and Control ,48:156-163.Google Scholar
- Li, Y., Wang, H.Y., Wang, W.Q., Pei, B.B. 2018. Harmonic analysis method of hybrid convolution window based on hanning and nuttall. Acta Energiae Solaris Sinica,39: 3363-3370.Google Scholar
- Liu, D.M., Yang, Z.L., Zhang, Y., 2018. Harmonic analysis of power system based on Nuttall self-convolution window four-spectrum-line interpolation FFT. Journal of Hefei University of Technology (Natural Science), 41: 12-17.Google Scholar
- Chen, Q, Wang, WQ., Wang, HY., 2020. Improved all-phase harmonic phase detection algorithm based on hybrid window. Electrical Measurement & Instrumentation,57: 105-109.Google Scholar
- Wang, Z.H., Huang, X.D., Yang, W. 2007. The Measuring Phase Method of All-Phase FFT.World Sci-Tech R & D, 4:28-32.Google Scholar
- Chen, Q, Wang, WQ, Wang, HY, 2020. Improved all-phase harmonic phase detection algorithm based on hybrid window. Proceedings of the CSU-EPSA, 32: 1-6.Google Scholar
Recommendations
The Study on FFT Harmonic Detecting Method of Rural Network Based on Wavelet Denoising
ICEET '09: Proceedings of the 2009 International Conference on Energy and Environment Technology - Volume 02The veracity of Harmonic Detection directly affect the evolution of harmonic pollution status of power network and the implementation of suppression measures, using wavelet soft-threshold de-noising to reduce the noises in the noised power harmonic ...
Design and Application of a Harmonic Detection Algorithm
ICICTA '11: Proceedings of the 2011 Fourth International Conference on Intelligent Computation Technology and Automation - Volume 02In order to compensate current harmonic in power system, a direct harmonic analysis algorithm, which was based on Fourier transform, was designed to identify and track harmonics. Compared with traditional FFT, the proposed algorithm was less dependent ...
A High Precision Algorithm of Harmonic Current Detection
ICECE '10: Proceedings of the 2010 International Conference on Electrical and Control EngineeringDetailed analysis and comparison are done about normal-used harmonic detecting algorithms. A harmonic detecting algorithm with high precision based on Discrete Fourier Transform (DFT ) is proposed, and simulations are also done to prove the validity of ...
Comments