基于S变换标准模板相似度的电压暂降分类

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Abstract A classification method for voltage dips based on S-transform according to standard template similarity is proposed. Standard template is established as below: Bilinear-interpolation is firstly adopted to form overall templates for dips of each type with different time duration, and then the part of overall template representing the dip characters is extracted as standard template. The similarity is calculated between standard and actual partial template established by scale transform and character extraction to the dip signal of the unknown type. Then classification is accomplished according to the principle of maximum similarity. Effectively using the clear time-frequency relation in local region, this method has strong anti-jamming capability and can classify voltage dips of different time duration with one standard template each type in a simple and clear way. The Matlab simulation and test results show that it is an effective method for voltage dips classification.

Key words： S-transform time-frequency scale transform standard template similarity voltage dips classification

Received: 12 May 2009 Published: 04 March 2014

PACS:

TM711

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	Li Kangrui
	Yang Honggeng

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Li Kangrui,Yang Honggeng. S-Transform Based Classification for Voltage Dips According to Standard Template Similarity[J]. Transactions of China Electrotechnical Society, 2010, 25(12): 139-146.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2010/V25/I12/139

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