Failure Probability Analysis of Sensitive Equipment Due to Voltage Sags Using Fuzzy-Random Assessment Method

The impact of voltage sags on equipment is usually described by equipment failure probability.It is generally difficult to assess and predict the probability because of the uncertainty of both the nature of voltage sags and the VTL (VTL) of equipment. By defining the equipment failure event caused by voltage sags as a fuzzy-random event, a fuzzy-random assessment model incorporating those uncertainty is developed. The model is able to convert the probability problem of a fuzzy-random variable to that of a common random variable by using λ-cut set. It is thus valuable in theoretical analysis and engineering application. The validity of the developed model is verified by Monte Carlo stochastic simulation using personal computers (PCs)as test equipment.

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Failure probability analysis of bridge structure systems

2015 IEEE 10th Jubilee International Symposium on Applied Computational Intelligence and Informatics ◽

10.1109/saci.2015.7208220 ◽

2015 ◽

Cited By ~ 1

Author(s):

Laszlo Pokoradi

Keyword(s):

Failure Probability ◽

Probability Analysis ◽

Bridge Structure

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Uncertainty Assessment of Sensitive Equipment Failure Probability Caused by Voltage Sags

2010 Asia-Pacific Power and Energy Engineering Conference ◽

10.1109/appeec.2010.5448203 ◽

2010 ◽

Author(s):

Zhijian Yuan ◽

Hong Wang ◽

Yong Huang ◽

Wu Chen

Keyword(s):

Failure Probability ◽

Uncertainty Assessment ◽

Voltage Sags ◽

Equipment Failure

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Failure Probability Analysis of Proof Loaded Components

Journal of Testing and Evaluation ◽

10.1520/jte11158j ◽

1988 ◽

Vol 16 (2) ◽

pp. 153 ◽

Cited By ~ 1

Author(s):

A Wolfenden ◽

J Margetson ◽

NR Cooper

Keyword(s):

Failure Probability ◽

Probability Analysis

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Research on Failure Probability of Load-Carrying Capacity for Existing Diseased Concrete Bridge

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.204-208.2282 ◽

2012 ◽

Vol 204-208 ◽

pp. 2282-2290

Author(s):

Xiao Yan Liu ◽

Xu Lei ◽

Sheng Cai Xiao ◽

Guang Hui Wang

Keyword(s):

Risk Assessment ◽

Failure Probability ◽

Carrying Capacity ◽

Assessment Method ◽

Correction Coefficient ◽

Load Carrying Capacity ◽

Reliability Calculation ◽

Load Carrying ◽

Bridge Assessment ◽

Current Code

As a bridge assessment method, risk assessment is more and more applied to load-carrying capacity assessment of existing bridge. This method assesses the bridge through the failure risk value which calculated by the failure probability and failure loss value. The most important factor to the risk assessment of load-carrying capacity upon the existing and diseased bridge is the calculation of failure probability. This paper combines the reliability calculation theory with a certain site detective data of bridge that considering uncertainty of load and resistance along with the diseases of bridge, and induces in the correction coefficient of load and resistance respectively to calculate the failure probability and reliability index of bridge. Finally, these indexes are compared with those provided by the current code to implement risk assessment of load-carrying capacity of the bridge.

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