基于改进全相位算法的高精度介质损耗角的测量

doi:10.19595/j.cnki.1000-6753.tces.190673

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Abstract The fast Fourier algorithm has the problems of fence effect and spectrum leakage in practical application. The accuracy of dielectric loss angle measurement by fast Fourier algorithm is not high. A high precision dielectric loss angle measurement method based on hybrid convolution window and improved all-phase was proposed. The mixed convolution window with better main and side lobes was used to truncate the signal to reduce the spectrum leakage. The "phase invariance" of all-phase Fourier transform was used to eliminate the fence effect. A differential phase correction method was proposed for all-phase Fourier transform. It is compared under the influence of fundamental frequency variation, signal-to-noise ratio change, harmonic content change and sampling points and the results show that the detection accuracy of the proposed method is higher than that of the windowed interpolation Fourier transform algorithm, especially in asynchronous sampling.

Key words： All-phase Fourier transform mixed convolution window dielectric loss angle

Received: 03 June 2019

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TM835

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	Articles by authors
	Zhang Jiajun
	Zhang Xinyan
	Chen Qian
	Di Qiang
	Yang Lulu

Cite this article:

Zhang Jiajun,Zhang Xinyan,Chen Qian等. High Precision Dielectric Loss Angle Measurement Based on Improved All-Phase Algorithm[J]. Transactions of China Electrotechnical Society, 2020, 35(14): 3097-3104.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.190673 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I14/3097

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