基于改进的广义谐波小波包分解和混沌振子的小电流接地系统故障选线

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Abstract As the small current grounding system fails, the zero-sequence current of each line appears complicated characteristics of non-stationary and nonlinear. A small current grounding system fault line selection method based on improved generalized harmonic wavelet packet decomposition and chaos oscillator detection algorithm is given in this paper. Through spread spectrum, the generalized harmonic wavelet packet decomposition algorithm could extract features of any frequency band and arbitrary bandwidth signal with less calculation, realizing fast and anti-aliasing separation to signals. Duffing oscillator system is unaffected by noise and presents highly sensitive to external signals which have the same frequency as the internal driving force. By time-scale transformation, Duffing oscillator could be adapted to the detection of different frequency signals. The fault line could be accurately selected by observing the changes in the system’s phase diagram. Numerical simulation showes the reliability and accuracy of the algorithm.

Key words： Fault line selection improved generalized harmonic wavelet packet decomposition algorithm chaos oscillator time scale transformation change of phase diagram

Received: 19 December 2013 Published: 13 April 2015

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	Zhang Shuqing
	Ma Yue
	Li Pan
	Shi Rongyan
	Jiang Wanlu
	Dong Xuan

Cite this article:

Zhang Shuqing,Ma Yue,Li Pan等. Application of Improved Generalized Harmonic Wavelet Packet Decomposition and Chaos Oscillator to Fault Line Detection in Small Current Grounding System[J]. Transactions of China Electrotechnical Society, 2015, 30(3): 13-20.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I3/13

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