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 357 for “"Power Flow"”.
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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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Power flow in railway electrification power system
… distribution system for a 2x25 kV railway power system. The analysis of Railway Power Supplies (RPS) presents a unique type of load flow problem which is characterized by its constant moving loads, dynamically changing load types (constant current/constant power), and its specialized …
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Two way power flow using GTO thyristors
Two-way power flow is nothing new and has been in practical use using line commutated converters for at least 50 years. With these types of converters, reversal of power flow can be achieved by increasing the firing angle of the devices beyond 90 degrees thus producing a negative DC voltage. Line …
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Optimal power flow with price-elastic demand
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Multiprocessing with microprocessors for power flow analyses
… explores the need for multiprocessing in the power industry. A suitable computer architecture for power system problems is presented. An efficient decomposition technique is developed to solve the problem parallely. Simulation of distributed processing using IBM 370 computer is considered. A …
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Direct-Current Power Flow Solvers and Energy Storage Sizing
In the modern power grid, the increasing penetration of intermittent energy sources like solar and wind into the comes with unsought challenges. With increasing smart grid directcurrent (DC) deployments in distribution feeders, microgrids, smart buildings, and highvoltage transmission, there is a …
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Optimal power flow using a genetic algorithm and linear algebra
… meet is electric load economically. The optimal power flow problem (OPF) problem is an optimization problem, in which the utility strives to minimize its costs while satisfying all of its constraints. A genetic algorithm (GA)---a specific type of artificial intelligence-is employed to perform …
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Decentralized control and placement of multiple unified power flow controllers
… devices, the optimal placement of Unified Power Flow Controller (UPFC) in power networks and the decentralized control of UPFCs for damping interarea oscillations of power networks"--Abstract, page iv.
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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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A comparison of digital methods applied to power flow studies
Four power flow algorithms were developed, and qualitative and quantitative comparisons were given in terms of solution time required, computer storage necessary, convergence characteristics, and ease of programming and program modification. Sparsity techniques were outlined, and a suggestion of …
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Active control of flexural power flow in elastic thin beams
Active control of flexural power flow in infinite, semi-infinite and finite beams by point force inputs has been analytically and experimentally studied. The systems were analyzed by assuming wave solution and then applying various terminating boundary conditions. Optimal control solutions were …
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Laboratory implementation of unified power flow controller hardware-in-loop simulation
… most promising network controllers for the bulk power system is the family of power electronics-based controllers, known as "flexible AC transmission system" (FACTS) devices. FACTS devices work by modifying power flow in individual lines of the power grid, maintaining voltage stability, and …
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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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An H [infinity] power flow approach to control of uncertain structures
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
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Control of Power Flow in Transmission Lines using Distributed Series Reactors
… Series Reactors (DSRs) can be used to control power flow to more fully utilize the capacity of a transmission network, delaying investment in new transmission lines. In this study the IEEE 39 bus standard test system is modified to a 3-phase, unbalanced model consisting of 230 kV, 345 kV and …
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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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Structural energy and power flow using a scanning laser Doppler vibrometer
A three-stage Experimental Spatial Power Flow (ESPF) method which computes an experimentally derived, spatially continuous representation of the structural power in l-D and 2-D structures is presented. The three stages of the ESPF method consist of first using a scanning laser Doppler vibrometer …
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A Line Outage Study for Prediction of Static Power Flow Redistribution
Transmission line is a crucial role in power transmission network which connects generating units to consumers. Some unpredicted failure events such as lightening or system faults can cause transmission line tripped, which may bring about a large interruption to the system and causes damage. When …
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