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 57 for “"Electric power distribution"”.
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A Heuristic Nonlinear Constructive Method for Electric Power Distribution System Reconfiguration
The electric power distribution system usually operates a radial configuration, with tie switches between circuits to provide alternate feeds. The losses would be minimized if all switches were closed, but this is not done because it complicates the system's protection against overcurrents. …
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Optimization and control of Distributed Energy Resources in electric power distribution grids
As renewable energy integration grows, the power grid is undergoing a rapid transition from a conventional, unidirectional system to a bidirectional and distributed network. In this new paradigm, end-users are becoming prosumer, individuals who both consume and produce energy. To enable prosumer …
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Optimization and control of Distributed Energy Resources in electric power distribution grids
As renewable energy integration grows, the power grid is undergoing a rapid transition from a conventional, unidirectional system to a bidirectional and distributed network. In this new paradigm, end-users are becoming prosumer, individuals who both consume and produce energy. To enable prosumer …
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High-Frequency Transformer Design for Solid-State Transformers in Electric Power Distribution Systems
… Hz transformer in applications demanding high-power density. Moreover, due to the high penetration of distributed generation, DC grids, energy storage systems, and sensitive loads, SSTs have been considered as an enabling technology for envisioned future energy systems. These applications …
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Computer simulation programs to systematically screen protective relay applications for electric power distribution
[Pages 28,52,G:24,G:48 missing] Using EMTDC, an advanced closed-loop simulator, a set of network application tests is created in COMTRADE file format. The COMTRADE files created may be used to control an injection set or sets, which, in-turn, automatically inject protective devices. Part of the aim …
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Probabilistic assessment of the impact of integrating large-scale high-power fast charging stations on the power quality in the electric power distribution systems
… the impacts of integrating large-scale high-power fast charging stations on the electric power quality by studying different power quality phenomena such as low-order and high-order harmonics, supraharmonics and voltage/light flickering. New three-phase effective power quantities are …
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An analysis of key macroeconomic variables and underlying basic assumptions contained in loan capital commitments on the financial sustainability of electric power distribution companies (DisCos) in the Nigerian electricity supply industry (NESI) under the Multi-year (MYT) framework
The revenue shortfall phenomenon in the Nigerian Electricity Market (NEM) has spiralled into a liquidity crisis under the established pricing methodology, the Multi-Year Tariff (MYT) framework. The financial liquidity crisis experienced is allegedly exacerbated by the inability of the Electricity …
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Feeder Performance Analysis with Distributed Algorithm
How to evaluate the performance of an electric power distribution system unambiguously and quantitatively is not easy. How to accurately measure the efficiency of it for a whole year, using real time hour-by-hour Locational Marginal Price data, is difficult. How to utilize distributed computing …
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Analysis of time-varying harmonics in electrical distribution systems
… nature of fundamental and harmonic signals in electric power distribution systems. Measurements show that signal variations are neither completely deterministic nor random. As a consequence the deterministic and random parts are analyzed separately. Two methods are employed to extract the …
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Power distribution feeder response to the asymmetric saturation of substation transformers caused by significant high-side DC currents.
… this distortion can be amplified at points on power distribution feeders where circuit topologies create series or parallel resonances. The performance of distribution feeders during asymmetric core saturation is explored in this work using harmonic powerflow simulation. A harmonic voltage …
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Application of Modular Multilevel Converters (MMC) Using Phase-Shifted PWM and Selective Harmonic Elimination in Distribution Systems
<p>Reducing the size and weight of a power electric system is a prodigious challenge to researchers as the development of the latest technologies emerge in the field of electrical engineering. A similar urge is there to develop a light-weight mobile power substation (MPS) to use in the electric …
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A novel optimization formulation for the direct computation of the voltage collapse point
The knowledge of the critical loading point of a power system is essential to assess its voltage stability condition. This point is traditionally obtained through continuation power flows which are relatively accurate but requires a considerable amount of processing time. In this work, the search …
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An Approach to Demand Response for Alleviating Power System Stress Conditions due to Electric Vehicle Penetration
Along with the growth of electricity demand and the penetration of intermittent renewable energy sources, electric power distribution networks will face more and more stress conditions, especially as electric vehicles (EVs) take a greater share in the personal automobile market. This may cause …
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Analysis and evaluation of transactive energy control in active distribution systems
The electric power distribution system is experiencing significant operational changes due to the integration of plug-in electric vehicles and intermittent distributed energy resources such as rooftop solar photovoltaics. As plug-in electric vehicle charging represents a significant increase in …
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Learning-Based Situational Awareness, Decision Making, And Flexibility Aggregation for Power Distribution Systems with Uncertainty
… benefits and technical challenges to electric power distribution systems. Specifically, due to the inherently intermittent nature of renewable energy resources and the invisible behaviors of customers in electricity use, there exists a high level of uncertainty, which has significantly …
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Extracting resilience metrics and load composition from utility data
… and smart meters have been incorporated into the electric power distribution systems infrastructure to record the status of the system. These devices record the details of outages and load. This thesis shows how this utility data can be processed to offer insights into the resilience and load …
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Smart Charging of Electric Vehicles: Algorithms, Ramifications, and Hardware Development
… employed to aid or accelerate the convergence of electric vehicles (EVs) and the power grid, in light of current challenges thereof. As the market penetration of EVs rises across vehicle segments, the corresponding increase in EV charging load is expected to significantly stress electric power …
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Evaluation of the Supply Chain of Key Industrial Sectors and its Impact on the Electricity Demand for a Regional Distribution Company
… international scenario, in a recent past, the electrical industry was based on the concepts of monopolistic concessions and vertical utilities structures. In Brazil, until recently, the electricity companies were all governmental properties that served restricted monopolized areas. In a similar …
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