A novel method of decision-making for power transformer maintenance based on failure-probability-analysis

2018 ◽  
Vol 13 (5) ◽  
pp. 689-695
Author(s):  
Hang Yang ◽  
Zhe Zhang ◽  
Xianggen Yin
Keyword(s):  
Decision Making ◽  
Failure Probability ◽  
Power Transformer ◽  
Probability Analysis ◽  
Novel Method ◽  
Transformer Maintenance

scholarly journals Power Transformer Fault Severity Estimation Based on Dissolved Gas Analysis and Energy of Fault Formation Technique

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Edwell T. Mharakurwa ◽  
G. N. Nyakoe ◽  
A. O. Akumu
Keyword(s):  
Decision Making ◽  
Fuzzy Logic ◽  
Total Energy ◽  
Power Transformer ◽  
Gas Analysis ◽  
Dissolved Gas ◽  
Dissolved Gas Analysis ◽  
Fault Severity ◽  
Incipient Fault ◽  
Transformer Maintenance

Decision making on transformer insulation condition based on the evaluated incipient faults and aging stresses has been the norm for many asset managers. Despite being the extensively applied methodology in power transformer incipient fault detection, solely dissolved gas analysis (DGA) techniques cannot quantify the detected fault severity. Fault severity is the core property in transformer maintenance rankings. This paper presents a fuzzy logic methodology in determining transformer faults and severity through use of energy of fault formation of the evolved gasses during transformer faulting event. Additionally, the energy of fault formation is a temperature-dependent factor for all the associated evolved gases. Instead of using the energy-weighted DGA, the calculated total energy of related incipient fault is used for severity determination. Severity of faults detected by fuzzy logic-based key gas method is evaluated through the use of collected data from several in-service and faulty transformers. DGA results of oil samples drawn from transformers of different specifications and age are used to validate the model. Model results show that correctly detecting fault type and its severity determination based on total energy released during faults can enhance decision-making in prioritizing maintenance of faulty transformers.

Impact of a Novel Method of Ethics Education on Nurse Leaders’ Capacity for Moral Decision-Making:

Nurse Leader ◽  
2021 ◽  
Author(s):  
Brooklyn Aaron ◽  
Avery Glover ◽  
Evelina Sterling ◽  
Stuart Downs ◽  
Jason Lesandrini
Keyword(s):  
Decision Making ◽  
Ethics Education ◽  
Nurse Leaders ◽  
Moral Decision ◽  
Moral Decision Making ◽  
Novel Method

scholarly journals A novel method to extend SAW for decision-making problems with interval data

2014 ◽  
Vol 3 (2) ◽  
pp. 225-236 ◽  
Author(s):  
Alireza Salehi ◽  
Mohammad Izadikhah
Keyword(s):  
Decision Making ◽  
Interval Data ◽  
Novel Method

Corrosion failure probability analysis of buried gas pipelines based on subset simulation

2019 ◽  
Vol 57 ◽  
pp. 25-33 ◽  
Author(s):  
Aihua Liu ◽  
Ke Chen ◽  
Xiaofei Huang ◽  
Jieyun Chen ◽  
Jianfeng Zhou ◽  
...  
Keyword(s):  
Failure Probability ◽  
Probability Analysis ◽  
Gas Pipelines ◽  
Subset Simulation ◽  
Corrosion Failure

Failure Probability Analysis Techniques for Long Mooring Lines

1992 ◽  
Author(s):  
J.F. Flory ◽  
J.W.S. Hearle ◽  
Richard Stonor ◽  
Yong Luo
Keyword(s):  
Failure Probability ◽  
Probability Analysis ◽  
Mooring Lines ◽  
Analysis Techniques

The Effect of FEM Mesh Density on the Failure Probability Analysis of Structures

2017 ◽  
Vol 22 (7) ◽  
pp. 2370-2383 ◽  
Author(s):  
Alireza Ghavidel ◽  
S. Roohollah Mousavi ◽  
Mohsen Rashki
Keyword(s):  
Failure Probability ◽  
Probability Analysis ◽  
Mesh Density
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