District based flood risk assessment in Istanbul using fuzzy analytical hierarchy process

2020 ◽  
Author(s):  
Ömer Ekmekcioğlu ◽  
Kerim Koc ◽  
Mehmet Özger
Keyword(s):  
Risk Assessment ◽  
Analytical Hierarchy Process ◽  
Flood Risk ◽  
Flood Risk Assessment ◽  
Fuzzy Analytical Hierarchy Process ◽  
Hierarchy Process

Power Transformer Life Analysis Based on Risk Assessment

2014 ◽  
Vol 672-674 ◽  
pp. 1151-1154 ◽  
Author(s):  
Yi Yun Sun ◽  
Xin Wang ◽  
Yi Hui Zheng ◽  
Li Xue Li ◽  
Qing Shan Xu
Keyword(s):  
Complex System ◽  
Risk Assessment ◽  
Analytical Hierarchy Process ◽  
Power Transformer ◽  
Fault Tree ◽  
Fuzzy Analytical Hierarchy Process ◽  
Full Life Cycle ◽  
Life Analysis ◽  
Full Life ◽  
Hierarchy Process

In order to grasp the state of full life cycle of the power transformer, A new method for power transformer life analysis based on risk assessment is proposed in this paper. Firstly power transformer risk assessment is conducted and fault tree is established accordingly to make the complex transformer faults system subdivide into various kinds of basic types directly; Secondly, the Fuzzy Analytical Hierarchy Process (FAHP) is designed to analyze the fault tree, so the complex system of transformer can be quantitatively described and the reliability of transformer can be obtained; Finally, transformer aging model is established to research the change rules of the transformer runnung state and determine the duration that the transformer stays in each stages of life. In addition, the application result shows the feasibility and effectiveness of the method above.

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