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Dissertations / Theses on the topic 'Electric lines'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Sa, Yingshi 1965. "Reliability analysis of electric distribution lines." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29546.

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Wood Poles are extensively used in North America as supports for electric distribution lines. On average, wood poles have a service life of 40 years with a replacement cost of approximately $2000. Since the distribution network is of relatively recent construction, maintenance and replacement costs have been relatively small compared to the total number of poles in service.<br>The goal of this thesis is to use the FORM/SORM algorithm to evaluate the reliability of a single pole and the results obtained when applied to a sample of 887 wood poles inspected in the field. The procedure was also ap

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2

Kryukova, N. V., Evgen Viktorovych Goncharov, and I. V. Polyakov. "Modern monitoring systems of electric power lines." Thesis, NTU "KhPI", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/38909.

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3

Bernardin, Sylvie. "Étude et analyse du délestage de glace atmospherique sur les cables /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1989. http://theses.uqac.ca.

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4

Fernandez-Ramirez, Eder-Ernesto. "Optimisation du taux de compensation série d'une longue ligne de distribution : cas de l'Hydro-Québec : Abitibi Téminscamingue [sic] /." Thèse, [Chicoutimi : Rouyn : Université du Québec à Chicoutimi] Université du Québec en Abitibi-Témiscamingue, 2006. http://theses.uqac.ca.

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Thèse (M.Eng.) -- Université du Québec à Chicoutimi, programme en partenariat avec l'Université du Québec en Abitibi-Témiscamingue, 2006.<br>Bibliogr.: f. 136-139. Document électronique également accessible en format PDF. CaQCU

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5

Kleinhans, Kevin. "Investigation into possible mechanisms of light pollution flashover of 275kv transmission lines as a cause of unknown outages." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1071.

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6

Kobziev, V., and E. Krasowski. "Some lines of energysaving in electric power industry." Thesis, ДРУКАРНЯ МАДРИД, 2016. http://openarchive.nure.ua/handle/document/8409.

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7

Mercer, Douglas. "Thor's hammer deflected : a history of the protection of power systems from lightning, with special reference to Queensland, 1950 to 1995 /." [St. Lucia, Qld.], 2001. http://adt.library.uq.edu.au/public/adt-QU20020712.164134/index.html.

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8

Jerrell, Jeffrey W. "Critical span analysis of overhead lines." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/16430.

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9

De, Villiers Wernich. "Prediction and measurement of power line carrier signal attenuation and fluctuation." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52410.

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Thesis (MScEng)--University of Stellenbosch, 2001,<br>ENGLISH ABSTRACT: A frequency domain Power Line Carrier (PLC) simulation program, with the ability to simulate signal attenuation including the coupling equipment, was developed. This simulation program was put to the test against the independent program of Professor L.M. Wedepohl and against practical field measurements. The predictions of the two programs were in precise agreement for a wide range of input parameters. Results from the field tests and predictions also showed close agreement. Further investigations, applying the sim

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10

Naredo, V. José Luis A. "Communication frequency response of high voltage power lines." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26725.

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Several methods for calculating the electrical phase and modal parameters of overhead transmission lines are described in this thesis; then, a graphical method for evaluating communication frequency response of delta transmission lines -based on the guidelines given by W. H. Senn [12,13,14]- is developed. The graphical method, combined with the parameters calculation methods, obviates the need of large mainframe computers for the analysis of power line carrier (PLC) systems. A new technique for assessing coupling alternatives, based on Senn's method, is developed. The technique is applied to

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11

Cecchi, Valentina Miu Karen Nan. "A modeling approach for electric power transmission lines in the presence of non-fundamental frequencies/." Philadelphia, Pa. : Drexel University, 2008. http://hdl.handle.net/1860/2583.

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12

Dirkse, van Schalkwyk W. J. "The placing of line surge arresters and fuses on 11 and 12 kV lines to protect equipment against lightning." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52553.

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Thesis (MEng)--University of Stellenbosch, 2001.<br>ENGLISH ABSTRACT: Unshielded distribution lines has a poor performance during lightning activity. Lightning initiates flashovers between the phases and earth and causes line breakers to trip several times during a lightning storm. In addition equipment like fuses, surge arresters and transformers are damaged by lightning and cause in some cases long power interruptions to customers. The application of line surge arresters on distribution lines is a solution that is implemented worldwide to limit the lightning related problems. This the

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13

Chen, Shelley L. "Programs for calculating high temperature ampacity and sag for overhead electrical conductors." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/17933.

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14

Dale, Joel Kelly. "Electric field lines and voltage potentials associated with graphene nanoribbon." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/2471.

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Graphene can be used to create circuits that are almost superconducting, potentially speeding electronic components by as much as 1000 times [1]. Such blazing speed might also help produce ever-tinier computing devices with more power than your clunky laptop [2]. Graphite is a polymorph of the element carbon [3]. Graphite is made up of tiny sheets of graphene. Graphene sheets stack to form graphite with an interplanar spacing of 0.335 nm, which means that a stack of 3 million sheets would be only one millimeter thick. [1]

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15

Mullen, W. Grigg. "An evaluation of the utility of four in-situ test methods for transmission line foundation design /." This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-07112007-092850/.

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16

Du, Toit Nicolaas Serdyn. "Calibration of UV-sensitive camera for corona detection." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/1016.

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17

Péter, Zsolt. "Modelling and simulation of the ice melting process on a current-carrying conductor = Modélisation et simulation de processus de délestage de glace par fonte sur un conducteur en présence de courant /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2006. http://theses.uqac.ca.

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Thèse (D.Eng.) -- Université du Québec à Chicoutimi, 2006.<br>La p. de t. porte en outre: Thèse présentée à l'Université du Québec à Chicoutimi pour l'obtention du doctorat en ingénierie. CaQCU Bibliogr.: f. 260-264. Document électronique également accessible en format PDF. CaQCU

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18

Tong, Sai-kit. "A computer-aided measurement system for monopolar high-voltage direct-current coronating lines /." [Hong Kong] : University of Hong Kong, 1986. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12321771.

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19

Swapnil, Muhammad Mubassir. "Computing effects of electric and magnetic fields near overhead transmission lines." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/63023.

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Analysis of Electric and Magnetic Fields produced by overhead transmission lines plays a critical role prior to their construction by electrical utilities. They affect the width of the transmission corridor and terrain clearances from overhead conductors. There is substantial interest in learning about the health effects of short and long-term exposure to these fields, as induced currents and voltages from parallel lines pose a hazard to line crews working on a de-energized line. A MATHCAD program has been developed to compute the strengths of Electric and Magnetic Fields and to determine any

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20

Tiancheng, Zhang, and Zhang Yunlin. "High voltage Direct Current lines in the Chinese electric power system." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-12757.

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21

Davalbhakta, Aneesh. "Improved configurations of sensors for the measurement of tower footing resistance a thesis presented to the faculty of the Graduate School, Tennessee Technological University /." Click to access online, 2008. http://proquest.umi.com/pqdweb?index=0&did=1597632921&SrchMode=1&sid=4&Fmt=6&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1279309880&clientId=28564.

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22

McWhorter, Bruce Burnett. "Transient temperature distributions in short-circuited electrical conductors." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/15951.

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23

Yang, Lifeng. "Computer relaying for EHV/UHV transmission lines." Diss., Virginia Tech, 1994. http://hdl.handle.net/10919/40085.

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As the power systems grow, system connections become more complex. Due to cost and environmental concern, more and more parallel lines and series compensated lines may be installed in the system. In order to efficiently use the transmission network, more nonlinear flexible devices such as the phase shifter and the advanced compensation system will be put into use. Once a fault occurs on such a system, a delay in clearing the fault is usually not permissive. This requires a new generation of relays which have high security and dependability and high operating speed. With the advent of high spee

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24

湯世傑 and Sai-kit Tong. "A computer-aided measurement system for monopolar high-voltage direct-current coronating lines." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1986. http://hub.hku.hk/bib/B31207467.

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25

Navaratnam, Srivallipuranandan. "Series impedance and shunt admittance matrices of an underground cable system." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26726.

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This thesis describes numerical methods for the evaluation of the series impedance matrix and shunt admittance matrix of underground cable systems. In the series impedance matrix, the terms most difficult to compute are the internal impedances of tubular conductors and the earth return impedance. The various formulae for the internal impedance of tubular conductors and for the earth return impedance are, therefore, investigated in detail. Also, a more accurate way of evaluating the elements of the admittance matrix with frequency dependence of the complex permittivity is proposed. Various for

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26

Marti, Luis. "Simulation of electromagnetic transients in underground cables with frequency-dependent modal transformation matrics." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/27442.

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This thesis presents a new model to simulate the behaviour of underground cable systems under transient conditions. The new cable model belongs to the class of time-domain, frequency-dependent models, and it is directly compatible with the solution algorithm of the EMTP (Electromagnetic Transients Program). The most important feature of the new model is that it takes into account the frequency dependence of the modal transformation matrices and cable parameters, thus overcoming the main limitation of currently-used transmission line and cable models, which assume that the modal transformation

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27

Olsen, Anders Tuhus. "Voltage Upgrading of Overhead Lines." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elkraftteknikk, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11218.

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Statnett wants to increase the transmission capacity in their 300 kV overhead lines by upgrading the operating voltage to 420 kV. To make this possible some modifications must be done. Insulator strings have to be elongated by two to four insulators and the air clearances must be checked. EN standards provide guidelines for how to calculate the air clearances adequately to provide required safety margins.It turns out that the formulas given by the standards provide greater safety margin than appropriate for upgraded transmission lines. By finding new proper safety margins, several towers which

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28

Guesdon, Cyril. "Etudes des répartitions des événements de verglas et de givre à travers le Québec /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2000. http://theses.uqac.ca.

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29

Leonard, Ronald William. "Application of the Monte Carlo method to the estimation of the risk of failure of transmission line insulation." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28496.

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A digital program has been developed which uses the Monte Carlo technique to estimate the risk of failure of transmission line insulation during system switching operations. The effect of overvoltage waveshape on insulation strength is included. A simple electrical system is used to demonstrate the method and to investigate some general aspects of error and parameter sensitivity.<br>Applied Science, Faculty of<br>Electrical and Computer Engineering, Department of<br>Graduate

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30

Crowder, Michael R. "Assessment of devices designed to lower the incidence of avian power line strikes /." PURL image only, 2000. http://www.arlis.org/docs/vol1/62243427.pdf.

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31

Cokkinides, George J. "Frequency dependent transmission line modeling with grounding representation." Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/15494.

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32

Savoullis, Yiannakis C. "Experimental verification and modification of a real-time ampacity program for overhead conductors." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/17840.

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33

Li, Quan. "AC loss characteristics of monolayer and multilayer superconducting power transmission cables." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609500.

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34

Filipovic-Gledja, Visnja. "A probability based unified model for predicting electrical, mechanical and thermal characteristics of stranded overhead-line conductors." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ30086.pdf.

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35

Crnojacki, Zorica. "Extra high voltage transmission corridor siting : technical, public, institutional and regulatory considerations /." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-10032007-171749/.

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36

Li, Xiaojuan. "Estimations of power system frequency, phasors and their applications for fault location on power transmission lines." University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0125.

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The thesis is devoted to the development of new algorithms for estimation of system frequency, power system phasors and transmission line fault location in the context of power system protection and control. A z-transform signal model combined with a nonlinear post-filtering scheme to estimate the operating frequency in a power system is first developed in the thesis. The signal model parameters are identified by an optimisation method in which the error between the model output and the actual signal that represents a voltage or current in the power system is minimised. The form and the struct

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37

Gueye, Babacar Salif. "Suitability of Casuarina equisetifolia as utility poles in Senegal." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-01102009-063410/.

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38

Wells, M. Glenn. "Transient temperature distributions in overhead fiber-optic ground wires." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/16885.

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39

Li, Xiaoyong. "Added CFO voltages from fiberglass poles and its electrical degradation." Master's thesis, Mississippi State : Mississippi State University, 2001. http://library.msstate.edu/etd/show.asp?etd=etd-11092001-113706.

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40

Bao, Yufei. "Integrated optical tapped-delay-lines : design, analysis and implementation." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/15446.

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41

Adamov, Minja Gemisic. "Measurements of local electric fields by doppler-free laser spectroscopy of hydrogen resonance lines." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2007. http://dx.doi.org/10.18452/15576.

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In dieser Arbeit wurde eine einfache laserspektroskopische Messmethode für lokale elektrische Feldstärken im Hinblick auf ihre Messmöglichkeiten und -grenzen untersucht. Als empfindliche optische Feldsensoren dienen dabei Wasserstoffatome, für die die Stark-Aufspaltung der Spektrallinien im elektrischen Feld wohl bekannt und exakt berechenbar ist. Die experimentellen Untersuchungen wurden an einer Niederdruck-Gaszelle durchgeführt, in der ein elektrisch geheizter Wolframdraht für thermische Dissoziation von Wasserstoffmolekülen sorgte. Die Wasserstoffatome wurden durch zwei gegenläufige Lasers

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42

Coggins, David Paul. "Single-ended traveling wave fault location on radial distribution lines." Thesis, University of Nottingham, 2010. http://eprints.nottingham.ac.uk/27951/.

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In this thesis a single-ended traveling wave fault location algorithm is developed for autonomously locating short circuit faults on a radial distribution line using the high frequency traveling wave transients. The traveling wave pattern observed at the sub-station is correlated with the traveling wave pattern predicted using time tree analysis for different fault locations and fault resistance. Genetic search techniques are used to evolve an initial population of possible fault locations to determine the most likely fault location. It is shown through extensive EMTP simulations that the sche

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43

Sellers, Sally M. "Caculation of ampacity for underground electrical cables." Thesis, Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/18973.

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44

Liao, Jen-Chyi. "Computer simulation of multiple coupled transmission lines in electronic packaging application." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184659.

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A method for simulating the transient responses of networks containing lossless transmission lines and lumped parameter elements of circuits, both linear and nonlinear, has been developed and investigated. The method combines the technique of network analysis and that of modal decomposition of transmission lines. A prototype computer simulation program, called UANTL, based on the developed algorithm has been implemented. Several example networks have been simulated using this program. The results have been compared with those generated by the well known circuit simulator program called SPICE.

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45

Chen, Shuoqi. "Characterization of semiconductor-based guided wave structures using field theoretical analysis techniques." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq21927.pdf.

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46

Visser, Abraham Johannes. "Transformerless series dip/sag compensation with a multilevel cascaded inverter." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52592.

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Thesis (MScEng)--University of Stellenbosch, 2001.<br>ENGLISH ABSTRACT: This thesis covers the development of a multilevel cascaded inverter for the purpose of costeffective transformerless series dip compensation. Of all known power quality problems, voltage dips are the greatest reason for concern. Dips/sags occur more frequently than outages and therefore tend to be more costly for industry as modem technical equipment becomes all the more sensitive to the quality and reliability of supply. A number of devices already exist to compensate for this problem, but the cost of most of thes

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47

Matandirotya, Electdom. "Measurement and modelling of geomagnetically induced currents (GIC) in power lines." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2459.

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Thesis (DTech (Electrical Engineering))--Cape Peninsula University of Technology, 2016.<br>Geomagnetically induced currents (GIC) are currents induced in ground-based conductor networks in the Earth's surface. The GIC are driven by an electric eld induced by geomagnetic variations which are a result of time-varying magnetospheric-ionospheric currents during adverse space weather events. Several studies have shown that there is a likelihood of technological damage (the power grid) in the mid- and low-latitude regions that could be linked to GIC during some geomagnetic storms over the past

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48

Schilder, Melanie. "Wideband modelling of capacitive voltage sensors for open-air transmission line applications." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53222.

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Thesis (PhD)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: This dissertation considers the wideband modelling of capacitive voltage sensors for open-air transmission line applications. Two novel topologies were introduced, namely a differential parallel plate sensor with a floating faraday cage for the interface instrumentation and a coaxial sensor mounted around the earth conductor with a faraday cage connected to the earth conductor. The modelling and analysis procedures included the derivation of equivalent circuit models in order to simulate the calibration factor, the load

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49

Markovic, Dejan. "Induced currents in gas pipelines due to nearby power lines." Access electronically, 2005. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20060807.155002/index.html.

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50

Chan, Morgan Hing Lap. "Channel characterization and forward error correction coding for data communications on intrabuilding electric power lines." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/29071.

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The use of intrabuilding electric power lines for data communications and local area networking is of growing interest. In this thesis, an original work to study the very important signal propagation and noise characteristics of the complex and hostile power line networks has been completed. Various impairments such as high and varying signal attenuation levels, periodic signal fading and impulse noise were identified. Estimates of the amplitude, pulse width and interarrival distributions of impulse noise were obtained. Communication signal attenuation of power line networks was explored. The

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