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Dissertations / Theses on the topic 'Ship Power System'

Author: Grafiati

Published: 1 April 2023

Last updated: 25 July 2025

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1

Leghorn, Jeremy T. "Modeling for ship power system emulation." Thesis, Monterey, California. Naval Postgraduate School, 2009. http://hdl.handle.net/10945/4302.

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CIVINS<br>Approved for public release, distribution unlimited<br>With the U.S. Navy's continued focus on Integrated Fight Thru Power (IFTP) there has been an ever increasing effort to ensure an electrical distribution system that maintains maximum capabilities in the event of system faults. Non-Intrusive Load Monitoring (NILM), which has been used extensively for condition based maintenance applications, could simultaneously be used to enhance the existing zonal protection system employed with Multi-Function Monitors (MFM). A test platform with three 5000 watt synchronous generators is being c

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2

Leghorn, Jeremy T. (Jeremy Thomas). "Modeling for ship power system emulation." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/50590.

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Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2009.<br>Includes bibliographical references (p. 68).<br>With the U.S. Navy's continued focus on Integrated Fight Thru Power (IFTP) there has been an ever increasing effort to ensure an electrical distribution system that maintains maximum capabilities in the event of system faults. This is to ensure that the crew has the ability to complete real time tactical missions in the event of battle damage to

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3

Källman, Jonas. "Ship Power Estimation for Marine Vessels Based on System Identification." Thesis, Linköpings universitet, Reglerteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-79248.

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Large marine vessels carry their loads all over the world. It can be a container ship carrying over 10 000 containers filled with foods, textiles and electronics or a bulk freighter carrying 400 000 tons of coal. Vessels usually have a ballast system that pumps water into ballast tanks to stabilize the vessel. The ballast system can be used to change the vessel’s trim and list angles. Trim and list are the ship equivalents of pitch and roll. By changing the trim angle the water resistance can be reduced and thus also the fuel consumption. Since the vessel is consuming a couple of hundred tons

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4

Akinnikawe, Ayorinde. "Investigation of broadband over power line channel capacity of shipboard power system cables for ship communications networks." Thesis, [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3155.

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5

Stallings, Brad L. "Design of a ship service converter module for a reduced-scale prototype integrated power system." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.navy.mil/100.2/ADA392078.

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Thesis (M.S. in Electrical Engineering) Naval Postgraduate School, December 2001.<br>Thesis advisor(s): Ciezki, John G. ; Ashton, Robert W. "December 2001." Includes bibliographical references (p. 201-202). Also available in print.

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6

Vicenzutti, Andrea. "Innovative Integrated Power Systems for All Electric Ships." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3424463.

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Nowadays, in the large ships the electric propulsion solution is a viable alternative to the mechanical one. In fact, at present the latter is limited only to ships with peculiar requirements, such as the need of a high cruise speed or use of specific fuels. The use of electric propulsion, paired with progressive electrification of onboard loads, led to the birth of the All Electric Ship (AES) concept. An AES is a ship where all onboard loads (propulsion included) are electrically powered by a single power system, called Integrated Power System (IPS). The IPS is a key system in an AES, thus re

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7

Nord, Thomas. "Voltage Stability in an Electric Propulsion System for Ships." Thesis, KTH, Elektriska energisystem, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-118932.

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This Master of Science thesis was written based on the shipbuilder Kockums AB feasibility study regarding the development of an All- Electric Ship for the Swedish Navy. The thesis was aiming at addressing voltage stability issues in a dc system fed by PWM rectifiers operating in parallel when supplying constant power loads. A basic computer model was developed for investigating the influence from various parameters on the system. It was shown that the voltage stability is dependent upon the ability to store energy in large capacitors. It was also shown that a voltage droop must be implemented

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8

Radan, Damir. "Integrated Control of Marine Electrical Power Systems." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1984.

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<p>This doctoral thesis presents new ideas and research results on control of marine electric power system.</p><p>The main motivation for this work is the development of a control system, power management system (PMS) capable to improve the system robustness to blackout, handle major power system faults, minimize the operational cost and keep the power system machinery components under minimal stress in all operational conditions.</p><p>Today, the electric marine power system tends to have more system functionality implemented in integrated automation systems. The present state of the art type

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9

COLAVITTO, ANDREA. "METODOLOGIE E STRUMENTI PER IL PROGETTO DI SISTEMI ELETTRICI NAVALI E MARINI." Doctoral thesis, Università degli Studi di Trieste, 2021. http://hdl.handle.net/11368/2988905.

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Lo scopo della tesi è quello di presentare metodologie e strumenti innovativi, applicabili ai sistemi elettrici navali, in grado di affrontare le problematiche date sia dal processo di progettazione convenzionale che dalla volontà di installare a bordo nuovi sottosistemi, dati i requisiti crescenti degli armatori e viste le stringenti normative sull'inquinamento. Le metodologie e strumenti analizzati possono migliorare la conoscenza del sistema già nelle prime fasi di progettazione. L'obiettivo è definire tutte le scelte progettuali possibili prima della fase contrattuale. Gli imprevisti legat

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10

Duvoor, Prashanth. "Energy storage system requirements for shipboard power systems supplying pulsed power loads." Master's thesis, Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-11082007-170421.

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11

Wu, Jian. "Data modeling for Shipboard Power System." Master's thesis, Mississippi State : Mississippi State University, 2004. http://library.msstate.edu/etd/show.asp?etd=etd-03252004-220340.

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12

Yu, Qiuli. "Multi-agent systems for reconfiguration of shipboard integrated power system including AC-DC zonal distribution system." Diss., Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-11072008-122943.

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13

Sarris, Emmanouil. "Naval ship propulsion and electric power systems selection for optimal fuel consumption." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68573.

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Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M. in Engineering and Management)--Massachusetts Institute of Technology, Engineering Systems Division, System Design and Management Program, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. [100]-102).<br>Although propulsion and electric power systems selection is an important part of naval ship design, respective decisions often have to be made without detailed ship knowledge (resistance, propulsors, etc.). Propulsion and electric power systems have alway

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14

da, Rin Aldo. "Integrated Power Systems in All Electric Ships: Dependability Oriented Design." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3424051.

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This work aims at providing a comprehensive and, as far as possible, standard and widely supported approach to a dependable design of all electric ship integrated power systems. The proposed approach is based upon latest development of dependability theory made recently available, from its founding lexicon and taxonomy to investigation tools and relevant international rules. In its first part, this work analyses present rule requirements governing the discipline of designing an integrated power system serving an all electric ship. Analysis covers system definitions (what is what) in terms of

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15

Swanberg, Boone Thomas. "A Heuristic Approach To Designing A Unique Ships Grid With Energy Storage for the Future Fleet of River Tender Ships." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/84397.

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This work discusses the implementation of a Unique Ships Grid design that utilizes Energy Storage. This Unique Ships Grid is used to enhance the efficiency of a Construction Single-Hull River Tender previously discussed and assessed by the Army Corps of Engineers and the United States Coast Guard (USCG). This Grid Design is shown to be both in compliance with applicable regulations and reliable due to built-in redundancy. Compliance with regulations and redundancy are both prized by the Maritime Community and the USCG. An applicable Heuristic Design Methodology is provided in conjunction with

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16

Amann, Nicholas Paul. "Adaptive overcurrent protection scheme for shipboard power systems." Master's thesis, Mississippi State : Mississippi State University, 2004. http://library.msstate.edu/etd/show.asp?etd=etd-06282004-140248.

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17

Bosich, Daniele. "Medium Voltage DC integrated power systems for large all electric ships." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423756.

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The Medium Voltage Direct Current (MVDC) distribution represents a promising technology for future shipboard power systems. In such a topic, during the last years, universities and reserch centers have proposed technical solutions to achieve the important targets of MVDC technology, for instance fuel saving, reducing power system weight/space, reconfigurability in case of fault and enhanced power quality. Conversely, the main challenge to face regards voltage control, which has to be capable for guaranteeing the paramount requirement of stability. In regards to this aspect, a possible instabil

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18

Sfakianakis, Konstantinos. "Design for safety and energy efficiency of electrical power systems in ships." Thesis, University of Strathclyde, 2016. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=27571.

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The ever-growing intercontinental maritime trade and transporthave identified the need for the ship and passengerssafety, energy efficiency and environmental pollution to be considered as dominant issues within shipping industry and academia. Recently introduced safety regulations, known as Safe-Return-to-Port, and ‘green’ regulations, by the IMO, came into force to address and, indirectly, couple the above objectives through the enforcement of specific safety performance requirements of ship systems after a casualty and mandatory environmental measures for GHG emissions limitation, for the fo

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19

Borisov, Konstantin A. "Multifunctional voltage source converter for shipboard power systems." Diss., Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-06042007-142951.

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20

Vieira, Giovani Giulio Tristão Thibes. "Hybrid powertrains analysis for ship propulsion using energy storage." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-17122018-090614/.

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The ship emission already occupy the eighth position in the world biggest emitters ranking. This happens because the ship operations have a huge demand variation therefore in order to reduce the ship emissions is required an efficient operation of the generators. This work aims at integrating advanced storage systems into the operation of diesel generators. The variation of the operation point has a direct interference on the emissions and on the diesel consumption, this variation is allowed through the frequency and voltage control. The use of lithium batteries for various operation points of

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21

Khaniya, Dina. "Development of three-phase continuation power flow for voltage stability analysis of distribution systems." Master's thesis, Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-11142008-101009.

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22

Zhang, Yujie. "Model-based design of a protection scheme for shipboard power systems." Master's thesis, Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-09292008-124423.

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23

Palla, Sunil Kumar. "Development of overcurrent relay model and power system simulator using National Instruments devices in real-time." Master's thesis, Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-09252008-094620.

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24

Ling, Chin Janie. "Life cycle assessment of marine power systems onboard roll-on/roll-off cargo ships : framework and case studies." Thesis, University of Newcastle upon Tyne, 2016. http://hdl.handle.net/10443/3432.

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A study into the environmental impact of marine power systems was performed in proximity with the defined research objectives: (i) present an overview on Annex VI The International Convention for the Prevention of Pollution from Ships, cargo ships, marine power systems and technologies; (ii) review life cycle assessment (LCA) methodology development; (iii) develop an LCA framework for marine power systems; (iv) carry out case studies to determine environmental impact, significant components and critical processes; (v) apply scenario analysis to investigate the sensitivity of the results to sel

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25

Francis, Gerald. "A Synchronous Distributed Digital Control Architecture for High Power Converters." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/31942.

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Power electronics applications in high power are normally large, expensive, spatially distributed systems. These systems are typically complex and have multiple functions. Due to these properties, the control algorithm and its implementation are challenging, and a different approach is needed to avoid customized solutions to every application while still having reliable sensor measurements and converter communication and control. <p> This thesis proposes a synchronous digital control architecture that allows for the communication and control of devices via a fiber optic communication ring us

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26

Hamilton, Hymiar. "An impact study of DC protection techniques for shipboard power systems." Master's thesis, Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-07062007-144823.

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27

Abell, Barry J. "Planning concepts to sustain, develop, and test complex naval combat systems at the Surface Combat Systems Center, Wallops Island, Virginia." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Mar%5FAbell.pdf.

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Thesis (M.S. in Systems Engineering Management)--Naval Postgraduate School, March 2005.<br>Thesis Advisor(s): Scott Carlson, Benjamin Roberts. Includes bibliographical references (p. 145-152) Also available online.

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28

Aktosun, Erdem. "Identification of hydrodynamic forces developed by flapping fins in a watercraft propulsion flow field." ScholarWorks@UNO, 2014. http://scholarworks.uno.edu/td/1900.

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In this work, the data analysis of oscillating flapping fins is conducted for mathematical model. Data points of heave and surge force obtained by the CFD (Computational Fluid Dynamics) for different geometrical kinds of flapping fins. The fin undergoes a combination of vertical and angular oscillatory motion, while travelling at constant forward speed. The surge thrust and heave lift are generated by the combined motion of the flapping fins, especially due to the carrier vehicle’s heave and pitch motion will be investigated to acquire system identification with CFD data available while the fi

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LAVIOLA, MICHELE. "LNG as the future marine fuel, Waste Heat Recovery Systems & Cold Ironing solutions for eco-friendly maritime transport." Doctoral thesis, Università degli studi di Genova, 2018. http://hdl.handle.net/11567/930196.

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Nowadays a regulatory framework regarding the pollutant emissions abatement, both at international and local level, significantly interests the maritime sector. To comply with the latest environmental rules, a new approach to ship design and a renewed way to operate the ship are need both in navigation and in harbour. This PhD Thesis aims to investigate on the positive features offered by the LNG fuel, more eco-friendly than the traditional marine fuel oils. In the first part of the research, the performance comparison between two marine engines, fuelled by natural gas and diesel oil res

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RUVIO, ALESSANDRO. "Distortion and faults detection in shipboard AC/DC power distribution system." Doctoral thesis, 2019. http://hdl.handle.net/11573/1237720.

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Nowadays electric propulsion has become a valid alternative to mechanical propulsion for large ships that require high speed. The electric propulsion advantages are well known and widely documented in the literature: higher dynamic performance of the electric propulsion motors; internal combustion engines separation from shafts; increased flexibility in space/zones subdivision; increased efficiency through the modulation of number of running generators; noise and vibration reduction; increasing in automation, with a consequent crew reduction. The use of electric propulsion along with the pro

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31

Yeh, Tsang-Bin, and 葉倉賓. "A Study of Keelung Harbor Shore Power System for Cruise Ship." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/76r6c5.

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碩士<br>國立臺灣海洋大學<br>河海工程學系<br>104<br>Marine transportation played an important role in global economic development, due to the trend of globalization of world economic activity. As the carrier ship transport of goods was growing rapidly and cruise market was also booming, so the development of ship oriented toward the large-scale and shipping sailings also increased substantially at the same time. But the exhaust emissions from ships also caused a lot of air pollution and had a huge impact punch to the environmental of port and coastal areas. Because of the terrain environment that Keelung Harbo

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32

YEN, TSUNG-HUI, and 顏聰輝. "Measurement and Improvement of Low Frequency EMI for Ship Power System." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/94217019520539394718.

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33

Lu, Shao-Bin, and 盧紹賓. "A Power Supply System with Digital Controller Applied in Deep Sea Exploration Ship." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/9s934w.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>106<br>This thesis is about a power supply system applied in deep sea exploration ship, including a 350V/300V DC/DC converter, a 350V/24V DC/DC converter and a driver system of 4-polar conductivity meter. The DC/DC converter is structured by Full-Bridge LLC circuit with two paralleled module to increase the output power up to 2 kW. The digital controller captures the voltage, current feedback and calculates the variations. In order to stabilize the output voltage, the frequency modulation technique is used to reach the required level, and duty control is employed to

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34

Pruske, Matthew Andrew. "Thermal-electrical co-simulation of shipboard integrated power systems on an all-electric ship." Thesis, 2009. http://hdl.handle.net/2152/ETD-UT-2009-08-317.

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The goal of the work reported herein has been to model aspects of the electrical distribution system of an all-electric ship (AES) and to couple electrical load behavior with the thermal management network aboard the ship. The development of a thermally dependent electrical network has built upon an in-house thermal management simulation environment to replace the existing steady state heat loads with dynamic, thermally dependent, electrical heat loads. Quantifying the close relationship between thermal and electrical systems is of fundamental importance in a large, integrated system like the

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35

Feng, Xianyong. "A Bio-Inspired Multi-Agent System Framework for Real-Time Load Management in All-Electric Ship Power Systems." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11031.

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All-electric ship power systems have limited generation capacity and finite rotating inertia compared with large power systems. Moreover, all-electric ship power systems include large portions of nonlinear loads and dynamic loads relative to the total power capacity, which may significantly reduce the stability margin. Pulse loads and other high-energy weapon loads in the system draw a large amount of power intermittently, which may cause significant frequency and voltage oscillations in the system. Thus, an effective real-time load management technique is needed to dynamically balance the loa

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36

Kim, Taekhyun 1977. "Polyspectral signal analysis techniques for interharmonics in shipboard power systems." 2008. http://hdl.handle.net/2152/17921.

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In this dissertation, we present the theory and application of polyspectral signal analysis techniques for interharmonics in shipboard power systems. Interharmonics are generated from various kinds of adjustable speed drives (ASD) in such power systems. ASDs are highly nonlinear devices due to the use of rectifiers and inverters. Since interharmonics can seriously hamper the normal operation of electric ships in many different ways (e.g., excitation of undesirable electrical and/or mechanical resonances, misoperation of control devices, and light flicker), the detection and analysis of interha

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37

Shagar, V. "Transient suppression in hybrid electric ship power systems." Thesis, 2019. https://eprints.utas.edu.au/31901/1/Shagar_whole_thesis.pdf.

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The requirements for power quality in ship power systems have been increasing over the years. This is an essential consequence of improving the efficiency of the onboard power network and reduce emissions in the long term. The connection of sophisticated navigation and measuring instruments into the grid has also necessitated a higher quality of power to ensure optimal operating conditions for all the loads and avoid malfunction of equipment onboard a ship. The most significant challenge to maintain power quality for the shipboard power system is to mitigate the transient conditions that arise

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38

Lin, Cheng-Wei, and 林承緯. "Harmonic Analysis and Improvement in Electric Ship Power Systems." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/22075459521243858754.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>96<br>Abstract More and more power electronic converter equipment such as adjustable speed drivers (ASDs) and single/three phase power converters are used in a shipboard for electric motor driver and various power supply applications due to advanced technology in power semiconductor switching devices in the recent years. These power converters that are nonlinear loads can produce non-sinusoidal distorted currents and these currents are then delivered and broadcasted through the power network and therefore bus voltages are distorted. This thesis aims to build a s

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Chen, Jr-Liang, and 陳智良. "Short-Circuit Current Analysis for Ship Shore Power Connection Systems." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/6ju73t.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>102<br>Ship shore power connection issue is essential and important for green port and clean harbor city around the world. From a whole grid point of view, the ship electric power system is connected to the onshore grid to become a part of onshore power networks through the shore power connection, which has increased the complexity of the short-circuit current analysis of ship power systems. To exactly calculate short-circuit currents at different fault points in the system for determining proper breaking capacity protection devices, this paper proposes a set of

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Huang, Chien-Jui, and 黃健瑞. "Analysis of U.S. Naval Ships' Power Distribution Systems." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/08140586015054877421.

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碩士<br>崑山科技大學<br>電機工程研究所<br>101<br>With the consequences of trade growth and economic development, ships are getting bigger with size and equipped with automatic devices resulting in consuming a lot of electrical power. Usually, the ship is equipped with 2 or 4 power generators and operates them depending on the need through single operation or parallel operation. Ships’ Power Distribution Systems is an independent working component in a ship, where in the power consumption from small devices to heavy machines are loaded on electrical power system, and could thus cause variations on current, vo

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Lee, Yung-Chi, and 李永濟. "A Study on Line Voltage Drop Analysis for Ship Shore Power Connection Systems." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/80804923084562186383.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>104<br>Among the demonstration systems of green ports and clean harbor cities promoted around the world, the vessel high voltage shore connection (HVSC) system is one of the most important. In terms of overall power grid, when the vessel power system becomes a part of the onshore power grid, the onshore power distribution system exhibits voltage fluctuations due to line or load variation, thus influencing service performance and life of the electrical equipment. In a ship-to-shore power connection system, if the voltage fluctuation or line voltage drop is too lar

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42

Stevens, McKay Benjamin. "Designing shipboard electrical distribution systems for optimal reliability." Thesis, 2013. http://hdl.handle.net/2152/23576.

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Analysis was performed to quantify and compare the reliability of several different notional shipboard DC distribution system topologies in serving their equipment loads. Further, the relationship between the relative placement of loads and generators within a distribution system and the system’s reliability was investigated, resulting in an algorithmically-derived optimal placement configuration in the system topology found to be the most reliable in the initial analysis. Using Markov models and fault-tree analysis, system reliability indices were derived from distribution system component

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43

Su, Hsin-Yi, and 蘇信益. "Improvement of Short Circuit Currents Using Fault Current Limiter in Electric Ship Power Systems." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/85856007822862710216.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>96<br>Abstract The ship automation and large-scale developments have forced more and more electrical equipment to be installed for enhancing the marine shipping economic competition. On the other hand, many ship building corporations worldwide has paid more attentions to all-electric ships due to the significant gains in terms of a more flexible solution for energy shortage, exhaust emission and large-scale cargos realized from this type of ship. Since larger capacities of power generations and electric loads are used in these two types of ships, large short cir

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Lan, Tsung-Kai, and 藍琮凱. "Multi-Agent Systems for Service Power Restoration Enhancement in Ships." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/45512014000480770096.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>99<br>Service restoration during a fault in ship electric power systems due to external forces or internal faults is an important task for future ship power systems design. To enhance the system reliability, this thesis aims to utilize a multi-agent system (MAS) based technique to build an effective service restoration strategy for performing fault isolation and restoration by feeder reconfigurations. When a fault in the system is detected and isolated, an appropriate restoration plan is derived by power electronic building blocks (PEBBs) used in the MAS to deter

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Uriarte, Fabian Marcel. "A Partitioning Approach for Parallel Simulation of AC-Radial Shipboard Power Systems." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7729.

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An approach to parallelize the simulation of AC-Radial Shipboard Power Systems (SPSs) using multicore computers is presented. Time domain simulations of SPSs are notoriously slow, due principally to the number of components, and the time-variance of the component models. A common approach to reduce the simulation run-time of power systems is to formulate the electrical network equations using modified nodal analysis, use Bergeron's travelling-wave transmission line model to create subsystems, and to parallelize the simulation using a distributed computer. In this work, an SPS was formulated us

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Kulkarni, Saurabh Shirish. "Fault location and characterization in AC and DC power systems." 2012. http://hdl.handle.net/2152/22121.

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The focus of this research is on identification, location, interruption, characterization and overall management of faults in conventional AC distribution systems as well as isolated MVDC power systems. The primary focus in AC distributions systems is on identifying and locating underground cable faults using voltage and current waveforms as the input data. Cable failure process is gradual and is characterized by a series of single-phase sub-cycle incipient faults with high arc voltage. They often go undetected and eventually result in a permanent fault in the same phase. In order to locate s

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Lin, Jun-Yi, and 林峻毅. "Analyzing the Penetration of Stochastic Harmonic Outputs of Ship-to-Shore Container Cranes to Power Supply Systems." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/17919684997213083907.

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碩士<br>義守大學<br>電機工程學系碩士班<br>98<br>Ship-to-shore container cranes are not only the major equipment of shipment of ocean transportation but also their processes are important to reduce freight time. Container cranes use inverters to control large AC/DC motors to achieve various actions of loading or unloading containers. However large inverters and large AC/DC motors have non-linear load characteristics, those characteristics will produce large amounts of harmonic currents when the equipment works. The harmonic currents produced will propagate through power systems, affect other electrical equipm

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Tyler, John. "A Pragmatic Standard of Legal Validity." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10885.

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American jurisprudence currently applies two incompatible validity standards to determine which laws are enforceable. The natural law tradition evaluates validity by an uncertain standard of divine law, and its methodology relies on contradictory views of human reason. Legal positivism, on the other hand, relies on a methodology that commits the analytic fallacy, separates law from its application, and produces an incomplete model of law. These incompatible standards have created a schism in American jurisprudence that impairs the delivery of justice. This dissertation therefore formulates a

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