Equipment Uncertainty Assessment due to Voltage Sags Considering the Uncertainties of Invalidation Event and its Severity

Abstract:

Considering the complicated uncertainty of the occurrence of equipment failure and the serious level of its sequence due to voltage sags, this paper classifies the invalided samples into three categories. The corresponding uncertainty is measured by random entropy, fuzzy entropy and cross entropy respectively. A maximum hybrid entropy assessment model is proposed. Based on the quantitative assessments of equipment invalidation rates, the comprehensive assessment is carried out according to the corresponding weight. Compared with existing methods, the proposed method is able to overcome both over- and under-estimation problems, with the results in line with practice very well.

• Periodical: Applied Mechanics and Materials (Volumes 321-324)
• Pages: 1347-1350
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.321-324.1347
• Online since: June 2013
• Authors: Da Yang, Ying Wang, Xian Yong Xiao
• Keywords: Equipment Sensitivity, Failure Rate, Hybrid Entropy, Voltage Sag

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