Research on Substation Reliability Based on the Minimum Cut Set Algorithm

2013 ◽  
Vol 718-720 ◽  
pp. 1268-1273
Author(s):  
Kai Wang ◽  
Xu Ping ◽  
Liu Yan ◽  
Li Geng
Keyword(s):  
Power Supply ◽  
Reliability Index ◽  
Reliability Assessment ◽  
Minimum Cut ◽  
Regional Power ◽  
Power Station ◽  
Cut Set ◽  
Electrical Wiring

Substation is the key component of regional power supply. The assessment of substation reliability index should be done before the assessment of regional power station reliability. Taking regional power station for example, this paper uses algorithm of minimum cutest which is based on spaces of electrical parts, gives analysis to the reliability of power station main electrical wiring. This method, being verified to provide an effective reliability assessment for power station main electrical wiring, lays a foundation for assessment of regional power station reliability.

scholarly journals PROBABILISTIC DURABILITY PREDICTION OF EXISTING BUILDING ELEMENTS

2004 ◽  
Vol 10 (2) ◽  
pp. 107-112 ◽  
Author(s):  
Romualdas Kliukas ◽  
Antanas Kudzys
Keyword(s):  
Reliability Index ◽  
Probability Distributions ◽  
Reliability Assessment ◽  
Reliability Prediction ◽  
Existing Building ◽  
Reliability Indices ◽  
Latent Defects ◽  
Durability Prediction ◽  
Building Elements

An effect of service and proof actions on probabilistic reliability (serviceability, safety and durability) of building elements (components and members) of existing enclosure and bearing structures is under consideration. Time‐dependent models for reliability assessment of elements under sustained variable and multicycle actions are presented. Revised reliability indices of existing elements exposed to service permanent and variable actions are discussed. It is recommended to assess the long‐term reliability index of elements taking into account the effect of latent defects. Truncated probability distributions of physical‐mechanical resistances of elements and an effect of their latent defects on reliability index assessment are taken into account. Methodological peculiarities of durability prediction of elements and avoiding unfounded premature repairs or replacements are analysed. The applied illustration of the presented method on the probabilistic reliability prediction of deteriorating concrete covers is demonstrated.

Study on Reliability Evaluation Method of Existing CFST Arch Bridge

2012 ◽  
Vol 226-228 ◽  
pp. 1679-1682
Author(s):  
Yi Song Zou ◽  
Hai Tao Hou ◽  
Wei Peng
Keyword(s):  
System Reliability ◽  
Reliability Index ◽  
Evaluation Method ◽  
Reliability Assessment ◽  
Steel Tube ◽  
Arch Bridge ◽  
Cfst Arch Bridge ◽  
Arch Bridges ◽  
Grading Standards ◽  
Bridge System

Based on reliability theory, the application calculation method of Concrete Filled Steel Tube (CFST) arch bridge system reliability index is studied. Select the most unfavorable load distribution in working condition of maximum moment and deflection at the mid-span, from the angle of strain energy, calculated the weights of CFST arch ribs component. On the basis of the grading standards of reliability assessment of the existing bridge components and the critical structures, CFST arch bridge system reliability assessment grading standards are constructed. CFST arch bridges reliability index are evaluated from two aspects (the arch ribs and segment) in this article. As the CFST arch bridge locates in the marine environment, corrosion environment is the serious level of C5-M, steel pipe corrosion is the major diseases of CFST, arch rib which on the corrosion conditions were assessed. The results show that the method can effectively assess the situation of CFST arch bridge.

Cross-regional Power Supply-Demand Analysis Model Based on Clustered Unit Commitment

2021 ◽  
Vol 141 (10) ◽  
pp. 629-641
Author(s):  
Shintaro Negishi ◽  
Keisuke Kimura ◽  
Ikumi Suzuki ◽  
Takashi Ikegami
Keyword(s):  
Power Supply ◽  
Unit Commitment ◽  
Demand Analysis ◽  
Regional Power ◽  
Analysis Model ◽  
Model Based

A minimum cut-set vulnerability analysis of power networks

2020 ◽  
Vol 21 ◽  
pp. 100302
Author(s):  
C. Caro-Ruiz ◽  
J. Ma ◽  
D.J. Hill ◽  
A. Pavas ◽  
E. Mojica-Nava
Keyword(s):  
Vulnerability Analysis ◽  
Minimum Cut ◽  
Power Networks ◽  
Cut Set

Analysis on Dynamic Fault Tree Based on Fuzzy Set

2011 ◽  
Vol 110-116 ◽  
pp. 2416-2420 ◽  
Author(s):  
Li Ping Yang
Keyword(s):  
Fuzzy Set ◽  
Fault Tree ◽  
Dynamic Logic ◽  
Fault Tree Analysis ◽  
Logic Gates ◽  
Minimum Cut ◽  
Tree Analysis ◽  
Dynamic Fault Tree ◽  
Large Complex System ◽  
Cut Set

In case of fault tree analysis of large complex system, the probability of bottom event in dynamic fault tree is uncertain in some cases. To address the problem, the paper presented a dynamic fault tree analysis method based on fuzzy set computation. The method separates logic attributes and timing attributes of dynamic logic gates. It can convert dynamic fault tree into static fault tree not considering timing constraints and obtain minimum cut set of static fuzzy fault tree with set operations, then the concept of minimum cut set is extended to dynamical minimum cut sequence. Thus, the dynamic fault tree was analyzed in both qualitative and quantitative aspects, which solve the problem that it is difficult to assign value of event probability in previously process.

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