Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 247 for “"System reliability"”.
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System reliability from component reliabilities
In this dissertation, the synthesis of system reliability from the reliabilities of the componentry constituting the system is considered. For the purpose of contextual elucidation, major emphasis is accorded to complex missile systems.
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Efficient time-dependent system reliability analysis
"Engineering systems are usually subjected to time-variant loads and operate under time-dependent uncertainty; system performances are therefore time-dependent. Accurate and efficient estimate of system reliability is crucial for decision makings on system design, lifetime cost estimate, …
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System reliability optimization of aircraft wings
System reliability based design of aircraft wings is studied. A wing of a light commuter aircraft designed according to the FAA regulations is compared with one designed by system reliability optimization. Both the level III, and the advanced first order, second moment (AFOSM) method are employed …
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Distribution system reliability improvement using distributed generators
… Generator. Investigation will be done on reliability improvement for Distribution system by using this Distributed Generator. Distributed Generator installed at Station Solar Hybrid in Tanjung Labian will be investigate. The SAIDI used as the Indices to show the reliability improvement for …
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Investigation of Methods for Structural System Reliability
… have been developed for the determination of the reliability of general redundant structural systems, including systems with brittle components. One is the failure mode approach, which is based on ways in which a structure can fail. The other is the stable configuration approach, which is based on …
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Power System Reliability Analysis with Distributed Generators
Reliability is a key aspect of power system design and planning. In this research we present a reliability analysis algorithm for large scale, radially operated (with respect to substation), reconfigurable, electrical distribution systems. The algorithm takes into account equipment power handling …
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System Reliability Analysis of Defected Pile group Foundations
… group foundation, utilizing a rational based system reliability analysis. This was achieved by conducting a comprehensive numerical parametric investigation using the computer program ABAQUS/Standard. The result of the parametric study showed that the presence of a defected pile in a pile …
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Generation system reliability with wind and solar power
… Therefore, it is worth to test and predict the system performance when great amount of conventional generators are substituted by renewable energy. This thesis is focus on evaluating the impacts of utilizing significant amounts of wind or solar energy sources in large on-grid power systems and …
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LOAD FLOW ANALYSIS IN COMPOSITE SYSTEM RELIABILITY EVALUATION
Composite system reliability evaluation is important in the determination of critical outage situations. This involves numerous load-flow studies for different system component outage conditions. The Object of this research project is to examine the existing methods suitable for repeated load-flow …
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System Reliability-Based Design and Multiresolution Topology Optimization
… techniques to large-scale structural systems with uncertainties. The specific goals of this dissertation are: (1) to develop an efficient scheme for topology optimization; (2) to introduce an efficient and accurate system reliability-based design optimization (SRBDO) procedure; and (3) …
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Composite system reliability evaluation using sequential Monte Carlo simulation
… used to assess the adequacy of composite power system networks. The sequential simulation approach is the most fundamental technique available and can be used to provide a wide range of indices. It can also be used to provide estimates which can serve as benchmarks against which other …
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Algebraic Reliability. Monomial ideals applied to multi-state system reliability
En esta tesis se estudia la fiabilidad de sistemas multi-estado mediante un acercamiento algebraico basado en ideales monomiales. Consideramos un sistema como un conjunto de componentes junto con una función de estructura. Tanto las componentes como el sistema se dicen binarios si u ́nicamente …
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Distribution System Reliability Evaluation Using Both Analytical And Simulation Approaches
The distribution system is the segment in an overall electric power system that links the bulk system and the individual customers. This section contributes approximately 80 percent of the total customer interruptions. It is therefore an important factor in providing an acceptable level of customer …
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Multiarea System Reliability: The Economic Evaluation of System Security Criteria
… approaches on the large-scale ISO New England system in a number of studies. The results provide useful insights into the multifaceted nature of issues that arise in the today's tightly coupled market and system operations. In fact, the studies on the economics of the system security provide …
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Structural System Reliability with Application to Light Steel-Framed Buildings
A general framework to design structural systems for a system-reliability goal is proposed. Component-based structural design proceeds on a member to member basis, insuring acceptable failure probabilities for every single structural member without explicitly assessing the overall system safety, …
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Fuse blow scheme and its impact on overhead distribution system reliability
… as well. To ensure the electrical distribution system is healthy, protection schemes have to be in place and one such method is the use of fuse blow method. This method is extensively used by the electric utility’s distribution system in Sabah and has shown effective protection requirements. …
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Operation and assessment of wind energy on power system reliability evaluation
… investigates the impact of wind power on power system reliability evaluation. The investigation includes long-term system planning and short-term operational planning on reliability evaluation taking into accounts different penetration levels of wind power. This thesis presents a Wind-Hydro …
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Incorporating substation and switching station related outages in composite system reliability evaluation
… station related outages in composite or bulk system reliability analysis. Station related failures can cause multiple component outages that can propagate to other parts of the network resulting in severe damages. In order to minimize the effects of station related outages on the composite …
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Incorporating station related maintenance and aging outages in composite system reliability evaluation
A power system is normally composed of a large number of generators and transmission lines that are connected through switching stations and substations. The quality and availability of power supply to the customer is highly dependent on the performance of the station equipment. Research shows that …
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Improved methods for fast system reliability analysis through machine-learning-based surrogate models
… problem, a special case of the k-terminal reliability problem. Both problems are known to be computationally intractable for general infrastructure graphs as the network size grows large, which motivates the use of Monte Carlo techniques to estimate the failure probability. However, Monte …
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