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.
Results
Showing 1 to 20 of 43 for “"Transmission networks"”.
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Modeling and Control of Overloaded Transmission Networks
… study of power systems and other large-scale networks which are operated in an emergency state characterized by branch overloads. The control objective is to return the network to a normal operating state, that is, to return the branch flows to their normal limits without violating the …
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Reliability evaluation of Sabah transmission and sub-transmission networks
… presently used in assessing the reliability of transmission networks. The concepts described lead to a realistic analysis of such systems. The most important features that are described concern the incorporation of value-based analysis, this often being of vital importance. In line with the new …
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Allocation and Management Issues in Multiple-Transaction Open Access Transmission Networks
The thesis provides a compendium of problems that are natural extensions of the research results reported here and appear to be good candidates for future work.
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Determining Plasmodium falciparum Malaria Transmission Networks Through Sequenom And Capillary Electrophoresis Genotyping
Declining malaria transmission leads to infection hotspots which need to be targeted to eliminate and eradicate malaria. The degree of parasite mixing in and around transmission foci is likely to impact the effectiveness of targeted interventions and should be considered when developing control …
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Two-Stage Fault Location Detection Using PMU Voltage Measurements in Transmission Networks
… location detection plays a crucial role in power transmission network, especially on security, stabilization and economic aspects. Accurate fault location detection in transmission network helps to speed up the restoration time, therefore, reduce the outage time and improve the system reliability …
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Design of wide-area electric transmission networks under uncertainty : methods for dimensionality reduction
… in the United States and Europe are forcing transmission planners to consider the design of interconnection-wide systems. In this context, planners are analyzing major topological changes to the electric transmission system rather than more traditional questions of system reinforcement. …
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Modeling and Control of Complex Stochastic Networks, With Applications to Manufacturing Systems and Electric Power Transmission Networks
For power transmission networks, we characterize the optimal amount of generation capacity to hold in reserve. The optimal solution indicates precisely how reserves must be adjusted according to environmental factors including the variability of power demand, and the ramping-rate constraints on …
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Design of Future Energy Infrastructure: Understanding trade-offs between Renewable Capacity, Storage and Transmission Networks for Low-Carbon Landscape
… between renewable capacity, storage, and transmission networks. The results show that the least-cost configuration, achieved when nuclear and battery capital costs fall by 50%, requires approximately $3.25 trillion in new investment - a 37% reduction relative to the baseline scenario. …
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A comparative study of unloaded transmission line switching with disconnectors using ATP
Disconnectors exist in most sub-transmission networks where high voltage equipment is used. The primary function of disconnectors is to electrically isolate equipment from the power system, such as breakers, for maintenance or repair. They are also used to interrupt negligible currents such as …
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Penetration level of un-conventional rural electrification technologies on power networks
… penetration level of these technologies on power transmission networks, especially the Capacitor Coupled Substation (CCS) and Auxiliary Service Voltage Transformers (ASVTs). These two technologies have the ability to tap power directly from high voltage transmission lines and convert it to …
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Saturation Effects in 3p3L Power Transformers due to Geomagnetically Induced Currents
… the normal operation of power transformers in transmission networks. The impact is caused by the dc current introduced into the windings of a transformer energised with ac, which leads to a simultaneous dc magnetomotive force (mmf) resulting in part-cycle saturation of the core and so, heat …
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Optical Temperature Monitoring of Electrical Power Transformer Networks
… Optical sensor network is laid on top of the transmission line network. This reduced the cost of fiber installation.The wavelengths of backscattered light at different temperatures for the modeled Fiber Bragg Grating have been obtained. These values are used as a reference to find the actual …
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Simplified approach for the reliability estimation of large transmission and sub-transmission systems
… analyse the expected performance of a utility’s transmission and sub-transmission network. The software requires a physical network model to be constructed, representing all network components. A high level of accuracy is obtained using such software, but significant effort is required to create …
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Connectomics of extrasynaptic signalling: applications to the nervous system of Caenorhabditis elegans
… chemical signalling via extrasynaptic volume transmission is also critical to brain function. As these interactions are not visible in the physical structure of the nervous system, current approaches to connectomics are unable to capture them. This work addresses the problem of missing …
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The Power Production Paradox: Revealing the Socio-Technical Impediments to Distributed Generation Technologies
… offer ways to enhance strained distribution and transmission networks. This project attempts to answer the apparently paradoxical question: why do new energy technologies that offer such impressive benefits also find the least use? The dissertation emphasizes how the history and culture of the …
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Voltage Security Optimization for Power Transmission Systems
… power planning to ensure voltage security in transmission networks. The problem is formulated as a voltage-secure multi-period optimal reactive power dispatch (MP-ORPD) problem. The optimization approach searches for optimal set-points of dynamic and static reactive power (var) resources. …
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Condition assessment using dissolved gas analysis on transmission power transformers
In transmission networks, power transformers and reactors play a major role in the supply of power in the country. Power transformers and reactors are identified as most critical assets and have a significant impact on power network reliability. It is thus important to know the effective condition …
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Assessing the energy implications of exploiting stormwater, through artificial aquifer recharge, as an alternative water source in the Cape Flats, South Africa
… is, the topography, distance and extent of their transmission networks. However, the embodied energy intensity of the Centralised alternative was found to be comparable to its electricity intensity, since more chemicals were to purify the water to potable levels. The Decentralised Approach's …
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Improving rational modeling realization for accurate EMT simulations
… through computer simulations of electrical networks, which included components such as transmission lines and power transformers, as well as equivalents of electric power distribution and transmission networks. The techniques developed in this thesis overcome limitations of conventional EMT …
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Smart management strategies of utility-scale energy storage systems in power networks
… ESSs to address some important issues of power networks at both distribution and transmission levels. The optimization strategies employed for ESS placement and sizing successfully improved the following aspects of power systems: performance and power quality of the distribution networks …
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