基于形态学和广义S变换的小电流接地故障选线方法

doi:10.3969/j.issn.1000-1158.2016.03.15

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Abstract A method of current single-phase fault line selection based on mathematical morphology and generalized S-transform is proposed. Mathematical morphology is a novel nonlinear filtering technique. Considering the signal characteristics of the power system, a linear structural element is selected. Not only can eliminate the burr shape noise, but also maintain the shape of the signal well. Generalized S-transform overcomes the shortcomings of the basic wavelet bases fixed in the S transform, and has a better frequency resolution. The signal was filtered by the mathematical morphological first. Then the generalized S-transform is used to analyze fault signals to get the modulus frequency matrix. Finally the energy characteristics modulus frequency matrix is analyzed to select the fault line. Simulation results show that the method could select fault line accurately under different working conditions of distribution network.

Key words： metrology fault line selection to single-phase grounding mathematical morphology generalized S transform mode frequency matrix

Received: 15 November 2014 Published: 22 March 2016

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TB971

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	Articles by authors
	CHEN Yi-qiang
	WANG Yu-tian
	TANG Bai-wen
	ZHANG Shu-qing

Cite this article:

CHEN Yi-qiang,WANG Yu-tian,TANG Bai-wen, et al. Mathematical Morphology and Generalized S Transform-based Fault Line Selection Method to Small Current Grounding[J]. Acta Metrologica Sinica, 2016, 37(3): 294-299.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2016.03.15 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2016/V37/I3/294

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