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 18 of 18 for “"power-flow analysis"”.
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GPU-enhanced power flow analysis
… Graphics Processing Units (GPUs) to improve the Power Flow (PF) analysis of modern power systems. GPUs are powerful vector co-processors that have been very useful in the acceleration of several computational intensive applications. PF analysis is the steady-state analysis of AC power networks …
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Fast optimal power flow analysis for large-scale smart grid
Optimal power flow OPF plays an important role in power system operation. The emerging smart grid aims to create an automated energy delivery system that enables two-way flows of electricity and information. As a result, it will be desirable if OPF can be solved in real time in order to allow the …
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State Space Modeling and Power Flow Analysis of Modular Multilevel Converters
… total elimination of the unwanted circulating power associated with both the fundamental line frequency and the second-order harmonic was demonstrated, and this resulted in a dramatic reduction in capacitor size. To gain a better understanding of the intricate operation of the MMC, this thesis …
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The Fourier Spectrum Element Method For Vibration And Power Flow Analysis Of Complex Dynamic Systems
… Method (FSEM), is proposed for the vibration and power flow analyses of complex built-up structures. In a FSEM model, a complex structure is considered as a number of interconnected basic structural elements such as beams and plates. The essence of this method is to invariably express each of …
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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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Detection and prevention of intrusions in power system cyber-physical infrastructure
… used by industrial control systems (ICS), e.g., power grids, can cause severe damage. In December 2015, remote intruders penetrated a Ukrainian power grid and caused a blackout that affected 225,000 residents. Mitigating physical damage from cyber attackers for SCADA can be very challenging …
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Stability Enhancement of the Microgrid under High-depth of Penetration of Electronically-coupled Resources
… supervisory control (SC) system, which provides power management for the microgrid, embeds the algorithms of the proposed method and enables parameter adjustment. The SC (i) identifies discrete-events and small-signal perturbations, (ii) activates and executes the corresponding algorithms …
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Data-Driven Approaches for Enhancing Power Grid Reliability
… key operational and reliability issues in power systems. The first part of this thesis addresses a prevalent problem in power distribution networks: the accurate identification of load phases. This study develops a data-driven model leveraging consumption measurements from smart meters and …
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An analysis of potential connection points for Hvalárvirkjun in the Westfjords
… into the improvement of the Westfjords’ power system was completed. There are plans to build a new hydropower plant, Hvalárvirkjun, in the Westfjords of Iceland which could provide the region with more reliability, as well as increase the potential load that the Westfjords’ power system …
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AC Optimal Power Flow for Physically and Economically Informed Grid Decarbonization
Current practices for power systems operations and planning rely on an approximate optimal power f low formulation known as DC Optimal Power Flow (DC OPF). Results from DC OPF are not implementable, requiring feasibility checks and adjustments from AC power flow analysis. Current methodologies do …
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Robustness and Stability Analysis with a Heavily-Meshed Distribution Network
Power distribution systems continue to evolve to accommodate the advancements in the field of microgrids and renewable energy resources. The future grids will be highly connected and will require increased reliability of the network. To this effect, low-voltage distribution systems with meshed or …
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Dynamic analysis of magnetorheological elastomer configured sandwich structures
… behaving materials) was made by adopting FEA analysis to obtain the optimum volume of pores and size of iron particles to enhance the performance of MREs. A higher order sandwich beam theory is extended to include damping properties of MRE. It has been demonstrated that a higher order sandwich …
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On the performance of base-isolated buildings: a generic model
… the existing measures of isolation performance. Power flow analysis is explored and the concept of power flow insertion gain, based on the total mean vibrational power flow entering a building, is introduced as a useful measure of isolation performance. This is shown to offer clear benefits by …
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Design and resource management of reconfigurable multiprocessors for data-parallel applications
… framework that deals with performance, power consumption and energy issues. These semi-customized systems reduce significantly runtime device reconfiguration by employing userprogrammable processing elements that are reusable for different tasks in large, complex applications. For the …
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Optimal Mitigation of Geomagnetically Induced Current Effects in Power Systems Considering Transformer Thermal Limits
… (GIC) which have adverse effects on the national power grid and potentially damage transformers on the grid. GIC flowing along transmission lines and through the transformers in power systems can be attributed to problems ranging from overheating of power transformers, harmonic generation, and …
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Enterprise control assessment for the mitigation of renewable energy by demand side management
The traditional power grid paradigm of centralized and actively controlled power generation facilities serving distributed and passively controlled electrical loads is challenged by the requirements for decarbonization, enhanced reliability and transportation electrification. The power grid will …
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Piled foundation dynamics: Considering inertial and underground railway excitation
… in a building is also explored using power-flow techniques. Finally, a virtual case study concerning the construction of a building next to a pre-existing underground railway tunnel shows how the developed models can be used in practice to evaluate the performance of different designs. …
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A performance-based design framework for base-isolated buildings against ground-borne vibration
… attenuation provided. In this dissertation, the Power~Flow Insertion~Gain~($PFIG$) is adopted as the main metric for the isolation performance. %It provides an understanding of the change in mean-vibrational-power values, associated to a given domain of the building, in two different design …