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 20 for “"Electricity networks"”.
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Transients in Electricity Networks with Distributed Generation
… penetration of distributed generation into the electricity network presents new challenges for reliable operation of the whole system. This thesis investigates the micro-grid dynamic performance caused by different kinds of common disturbances such as sudden switching of Photovoltaic (PV) …
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Resilient operations of smart electricity networks under security and reliability failures
Blackouts (or cascading failures) in Electricity Networks (ENs) can result in severe consequences for economic activity, human safety and national security. Recent incidents suggest that risk of blackouts due to cyber-security attacks and extreme weather events is steadily increasing in many …
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Impact of distributed energy resources on locational marginal prices and electricity networks
… of the modern power grid, active players in electricity markets and salient tools used in the operation of electric grids. The objective of this thesis is to determine the impact distributed energy resources have on power grids and markets. This research investigates, models, and quantifies …
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Power quality enhancement in electricity networks using grid-connected solar and wind based DGs
The integration of DG into utility networks has significantly increased over the past years primarily as a result of growing energy demand, coupled with the environmental impacts posed by conventional fossil fuel-based power generation. The prominent DG technologies which are capable of meeting …
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Planning studies for distribution grids with high penetration of distributed energy resources: the challenge of fairness in future electricity networks
… approach for planning in distribution networks of "oversize, fit and forget" is not enough. A review of the literature in grid planning shows that the current focus is on transmission-network-inspired methods that are not realistically scalable for the distribution network case. …
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Planning and Operation of Multi-Vector Energy System with High Penetration of Renewable Energy Sources
… of renewable energy sources (RESs) into current electricity network introduces challenges to the planning and operation of electricity network due to the intermittent nature of the resources which will result in variability and uncertainty in electricity supply. The power-to-gas (P2G) …
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Swamp rats, fat cats and soggy suburbs : planners and engineers in south east Florida
… demand for water supply, road, sewerage, electricity networks. But the relationship between the professional values, education and practices of city or urban planning and civil engineering, and these infrastructure networks is an under-explored phenomenon in both fields. This doctoral …
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Decentralising active network management through distributed constraint optimisation
Electricity networks are becoming more complex due to the introduction of distributed energy sources. The power grid will face fundamental changes in its structure and behaviour. In addition, new technologies will be required in order to maintain the stability of the network. A key enabling …
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Operation and assessment of wind energy on power system reliability evaluation
… world are incorporating wind power into their electricity networks. Wind power is an intermittent source of energy and its technical and financial impacts on the transmission and distribution networks are not yet totally investigated. This thesis investigates the impact of wind power on power …
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Making a Difference that Matters: A New Materialist Approach to Environmental Education in the Age of Algorithms
… show that the transition to smart grids for electricity distribution holds out the promise of civic energy autarchies, namely, selfsufficient local electricity networks based on renewable sources, low demand and citizen participation, but it has served to deliver so-called ‘civic climate …
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Analysis and characterization of ancillary service demand response strategies for variable air volume HVAC systems
… difficulties with respect to solar and wind electricity resources increase the requirement of grid-scale reserve capacity and add strain to existing firm generators used for reserves and other ancillary services. Residential and commercial buildings account for a large portion of the …
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Economic efficiencies of the energy flows from the primary resource suppliers to the electric load centers
… studying the movements of coal, natural gas, and electricity in an integrated fashion is presented. Conceptually, the model developed is a simplified representation of the national infrastructures, structured as a generalized, multiperiod network composed of nodes and arcs. Under this formulation, …
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Intelligent voltage dip mitigation in power networks with distributed generation
… especially voltage and reactive power support in electricity networks are currently being recognized, researched and found to be quite useful in voltage dip mitigation.
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Dispatchable Operation of Multiple Electrolysers for Demand Side Response and the Production of Hydrogen Fuel-Libyan Case Study
… energy and its integration into existing electricity grids. The variable nature of RE generators assessment affects the ability to balance supply and demand across electricity networks; however, the use of energy storage and demand-side response techniques is expected to help relieve this …
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Cascading Failures and Contingency Analysis for Smart Grid Security
… upgrade to a highly intelligent generation of electricity networks commonly known as Smart Grid. However, the growing integration of power system with communication network also brings increasing challenges to the security of modern power grid from both physical and cyber space. Malicious …
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Development of a power conditioner for a PMSG-based wind energy system integrated into a weak grid
… loads and due to their ever changing nature, electricity networks experience power imbalance continually. These non-linear asymmetrical loads draw distorted unbalanced currents and voltages at the point of common coupling (PCC) which propagate into the distribution network. Power quality has …
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Creating additional network capacity on constrained medium voltage networks utilizing distributed generation (specifically PV technology)
Medium voltage (MV) networks are designed for forward power flow and they radially distribute power to various types of electrical loads. With electrical load growth driven by economic growth, aging networks have limited network capacity to supply the increase in load demand and non-technical …
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A roadmap for energy transition strategic planning and governance: a case study of Nigeria's grid-based renewable electricity sector.
… energy sources into the planned 30GW of electricity generation by 2030. This is principally because deploying renewable energy on the national grid provides succour to the complex dual energy issues of access and poverty currently experienced in Nigeria, promoting the reduction of …
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Integration of distributed small-scale photovoltaic and energy storage systems in power networks
… variable renewable energy in distribution networks. This trend is set to continue due to a combination of factors, such as the decreasing cost of technology and the decarbonisation policies governments have committed to deploy for the mitigation of climate change. It is anticipated that …