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Proceedings Paper

A mathematical model for dynamic over-load protection based on the heat balance differential equation
Author(s): Changchun Chi
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Paper Abstract

The study of new digital algorithm of over-load protection is meaningful to improve the efficiency of the over-load protection validity. This paper establishes a mathematical model for the dynamic over-load protection, based on the heat balance differential equation, to determine how temperature increases with the change of the protection object's current. Different from the common inverse time characteristic, this model conforms to the load actual operating law and the protection request.Wavelet analysis, as a new kind of time-frequency representation technique, has been applied widely in different engineering practice. To solve the problem of the full-wave Fourier algorithm which is disable to filter decaying DC component and has worse frequency characteristic, it is presented an algorithm depending on the combination of subtraction filter and full-wave Morlet complex wavelet amplitude algorithm. It can filter efficiently decaying DC component, has clear frequency characteristic, and make calculation with high precision.

Paper Details

Date Published: 20 August 2010
PDF: 7 pages
Proc. SPIE 7820, International Conference on Image Processing and Pattern Recognition in Industrial Engineering, 78203Q (20 August 2010); doi: 10.1117/12.867201
Show Author Affiliations
Changchun Chi, Shanghai Dianji Univ. (China)


Published in SPIE Proceedings Vol. 7820:
International Conference on Image Processing and Pattern Recognition in Industrial Engineering
Shaofei Wu; Zhengyu Du; Shaofei Wu; Zhengyu Du; Shaofei Wu; Zhengyu Du, Editor(s)

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