Risk Assessment of Substation Main Connection Based on LCC Management

2014 ◽  
Vol 1070-1072 ◽  
pp. 956-960
Author(s):  
Yan Xu ◽  
Chi Cheng ◽  
Han Ping
Keyword(s):  
Risk Assessment ◽  
Life Cycle ◽  
Petri Nets ◽  
Life Cycle Cost ◽  
Cost Management ◽  
Fault Tree Analysis ◽  
Life Cycle Management ◽  
Risk Indicators ◽  
Management Approach ◽  
Basic Equations

Life-cycle cost management is the foundation and techniques for life-cycle cost management. Petri nets has a graphical expression, can improve and add more features and information to Fault tree analysis, Markov equations and so on, raising the speed and accuracy of the entire system of risk assessment. The paper propose a risk assessment based on the life-cycle management approach, establish four state model to analysis transformer substation main wiring operation, discuss elements occurring planned maintenance events and breaker tripping phenomenon, and propose using the basic equations of Petri nets to determine system status and calculate the corresponding probabilities, quantitative analysis of the outage costs of the substation main connection off for running, and seek the best value under the run. In the example discussing and calculating the risk indicators of outage costs for different wiring schemes, the results demonstrate the feasibility of the proposed algorithm.

Risk Assessment of Power Transformer Life Cycle Cost Based on Extensible Matter-Element Model

2014 ◽  
Vol 644-650 ◽  
pp. 3538-3541
Author(s):  
Guo Hua Qiao ◽  
Xiang Jun Guo ◽  
Lan Min Wu ◽  
Hong Liang Liu ◽  
Zheng Ren ◽  
...  
Keyword(s):  
Risk Factors ◽  
Risk Assessment ◽  
Life Cycle ◽  
Life Cycle Cost ◽  
Cost Management ◽  
Power Transformer ◽  
Control Strategies ◽  
Element Model ◽  
Assessment System ◽  
Matter Element Model

Making assessment of risk factors of power transformer life cycle cost modeling is an important mean of improving the scientificity of transformer life cycle cost management. Considering the risk factors of transformer life cycle cost, this paper presents risk assessment index system of transformer life cycle cost, applying matter-element model and extension analysis theory to quantify the qualitative indexes in order to assess the risk. Combined with an example, the paper quantifies the uncertain factors of power transformer life cycle cost management in order to build the life cycle cost risk assessment system. It realizes the risk rating of the transformer cost assessment, getting the key risk factors which affect transformer cost so that we can put forward targeted control strategies according to various risk factors in practical engineering.

scholarly journals Risk assessment of ice dams for water diversion projects based on fuzzy fault trees

2021 ◽  
Vol 11 (2) ◽  
Author(s):  
Mengkai Liu ◽  
Xiaoxia Dong ◽  
Hui Guo
Keyword(s):  
Risk Assessment ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Northern China ◽  
Indicator System ◽  
Water Diversion ◽  
Risk Indicators ◽  
Scoring Method ◽  
Study Results ◽  
Dam Risk

AbstractIce dams are among the important risks affecting the operational safety and water conveyance efficiency of water diversion projects in northern China. However, no evaluation indicator system for ice dam risk assessment of water diversion projects has been proposed. Therefore, in this paper, based on the formation mechanism of ice dams, the risk assessment indicator system and the possibility calculation model of ice dams were both proposed for water diversion projects based on the fuzzy fault tree analysis method. The ice dam risk fault tree constructed in this study mainly includes three aspects: ice production, ice transport, and ice submergence conditions. Eighteen basic risk indicators were identified, and 72 minimum cut sets were obtained by using the mountain climb method. Eight risk indicators were determined as the key risk indicators for ice dams, including meteorological conditions, narrowed cross section, sluice incident, erroneous scheduling judgment, ice cover influence, flat bed slope, control structures, and ice flow resistance of piers. Then, the canal from the Fenzhuanghe sluice to the Beijumahe sluice of the Middle Route of the South-to-North Water Diversion Project was taken as the research object. Combined with the expert scoring method, the ice dam risk probability of the canal was determined to be 0.2029 × 10−2, which was defined as a level III risk, which is an occasionally occurring risk. The study results can support ice dam risk prevention and canal system operation in winter for water diversion projects.

Integrated Training Solutions: An Effective Tool to Synchronize People and Maintenance (U.S. Navy LCAC Case Study)

2012 ◽  
Author(s):  
Maurice Hartey ◽  
Thomas Bodman ◽  
Arlene Korn
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Training Programs ◽  
Operating Time ◽  
Life Cycle Management ◽  
Cost Driver ◽  
Maintenance Costs ◽  
Knowledge And Skills ◽  
Long Run

Maintenance, especially in a Marine environment, is continuous and costly. Life Cycle Management of a Marine Gas Turbine system encompasses many costs, of which repair parts, labor and equipment downtime associated with failures and maintenance are a significant portion. In fact, people (labor) make up the largest component of overall maintenance costs. Investing in people the largest cost driver to life cycle cost has a direct return in the long run, in terms of maintenance effectiveness and efficiencies. Applying and reinforcing knowledge and skills in a maintenance environment translates to improved reliability outcomes, longer operating time, fewer parts needs, and ultimately costs savings. However, given today’s constrained fiscal environment, the value of spending money for training rather than buying more parts or applying more maintenance, may not appear obvious. Such thinking is short sighted, and ultimately leads to reduced reliability and increased maintenance in the long run. This paper will explore these areas, and recommend how training programs can be effective predictive, proactive and responsive.

scholarly journals Aviation Technology Life Cycle Management: Importance for Aviation Companies, Aerospace Industry Organizations and Relevant Stakeholders

2017 ◽  
Vol 5 (2) ◽  
pp. 15 ◽  
Author(s):  
Stanislav Szabo ◽  
Ivan Koblen
Keyword(s):  
Life Cycle ◽  
Cost Estimation ◽  
Life Cycle Cost ◽  
Aerospace Industry ◽  
Life Cycle Management ◽  
International Standards ◽  
Life Cycle Stages ◽  
Aviation Technology ◽  
Technology Life Cycle ◽  
System Life

<p align="LEFT">The paper in the introductory part underlines some aspects concerning the importance of Aviation Technology Life Cycle Management and informs on basic international standards for the processes and stages of life cycle. The second part is focused on definition and main objectives of system life cycle management. The authors subsequently inform on system life cycle stages (in general) and system life cycle processes according to ISO/IEC/IEEE 15288:2015 standard. Following the fact, that life cycle cost (LCC) is inseparable part and has direct connection to the life cycle management, the paper contains brief information regarding to LCC (cost categories, cost breakdown structure, cost estimation a.o.). Recently was issued the first part of Aviation Technology Life Cycle Management monograph (in Slovak: ”Manažment životného cyklu leteckej techniky I”), written by I.Koblen and S.Szabo. Following this fact and direct relation to the topic of article it is a part of article briefly introduced the content of two parts of this monograph (the 2nd part of monograph it has been prepared for the print). The last part of article is focused on issue concerning main assumptions and conditions for successful application of aviation technology life cycle management in aviation companies, aerospace industry organizations as well as from the relevant stakeholders side.</p>

Reengineering Maintenance for Dependability

1998 ◽  
Author(s):  
Daniel J. Risdon ◽  
Thomas Van Hardeveld
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Life Cycle Management ◽  
Life Cycle Approach ◽  
Reliability Centered Maintenance ◽  
Maintenance Program ◽  
Complete Life Cycle ◽  
Design Changes ◽  
Operations And Maintenance ◽  
Solid Foundation

Maintenance is undergoing a major revolution. The management of maintenance is being impacted by business-driven changes that are forcing fundamental improvements to the maintenance function. Maintenance planning and execution are now considered as a strategic component of asset life cycle management. The link between maintenance and design is being furthered by placing emphasis on considering reliability and maintainability during the design phase. The application of Reliability-Centered Maintenance is becoming an important method for determining the optimum maintenance program for facility assets, while at the same time providing a solid foundation for triggering selective system improvements and design changes and managing life cycle cost and risk associated with assets. The concept of dependability provides the focus for integrating design, operations and maintenance into a coherent and complete life cycle approach to facilities. Dependability is strongly linked to quality standards since, for many companies, dependability is the major component of quality that has to be satisfied to meet customer needs. This paper describes the practical application of a quality approach to a gas transmission company which has recently undergone a reengineering of its design, operations and maintenance processes.

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