基于三角自卷积窗的介损角高精度测量算法

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Abstract When using FFT for dielectric loss angle (DLA) measurement, the spectral leakage causes errors because of non-synchronization sampling. To reduce those errors, an interpolated FFT algorithm for dielectric loss angle measurement based on triangular self-convolution window (TSCW) is presented in this paper. As the side lobe of the TSCW decays at a very fast rate, errors of DLA measurement caused by spectral leakage can be eliminated by the TSCW. The voltage and current signals were weighted with the TSCW, respectively. Then, the DLA is estimated by fundamental phases of the voltage and current signals though interpolated FFT algorithm. The simulation results, which include fundamental frequency fluctuation, changing of real value of DLA and harmonic component variance, have verified the effectiveness and practicability of the algorithm.

Key words： Dielectric loss angle triangular self-convolution window FFT spectrum leakage

Received: 03 March 2008 Published: 12 February 2014

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TM933

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	Articles by authors
	Wen He
	Teng Zhaosheng
	Wang Yi
	Wu Shuangshuang
	Wu Rongrong

Cite this article:

Wen He,Teng Zhaosheng,Wang Yi等. High Accuracy Dielectric Loss Angle Measurement Algorithm Based on Triangular Self-Convolution Window[J]. Transactions of China Electrotechnical Society, 2009, 24(3): 203-208.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2009/V24/I3/203

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