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Dissertations / Theses on the topic 'Collisions with overhead electric lines'

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Published: 4 June 2021
Last updated: 29 July 2025

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1

Kotoane, Mapule. "Modelling risk of Blue Crane (Anthropoides paradiseus) collision with power lines in the Overberg region." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50024.

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Thesis (MA)--Stellenbosch University, 2004.<br>ENGLISH ABSTRACT: This study addresses the problem of Blue Crane (Anthropoides paradiseus) collisions with power lines in the Overberg region, home to approximately 50% of South Africa's national bird's global population. The low visibility of power lines against the landscape is considered to be the major cause of collisions. These claim at least 20 birds annually, which is a considerable loss to a vulnerable species. For this study, expert knowledge of the Blue Cranes' biology, general behaviour and use of its habitat were compiled. These
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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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10

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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11

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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12

Hall, David Eric. "Transient thermal models for overhead current-carrying hardware." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/17133.

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13

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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14

Langlois, Sébastien 1981. "Design of overhead transmission lines subject to localized high intensity wind." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99775.

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Wind loading considered in the design of overhead transmission lines is based on extreme values of synoptic wind, i.e. boundary layer wind originating from largescale meteorological pressure systems. Localized high intensity wind (HIW) storms such as tornadoes and downbursts are a different type of extreme wind frequently causing failures of overhead lines. This thesis covers the design aspects of overhead transmission lines when subject to localized HIW storms. A comprehensive review of the literature is included on the effects of such wind storms on lines and on mitigation measures. Furtherm
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15

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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16

Roberge, Mathieu. "A study of wet snow shedding from an overhead cable /." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99790.

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Wet snow accumulating and shedding from overhead transmission lines can lead to a number of serviceability, safety and mechanical reliability issues. An innovative and inexpensive method to reproduce wet snow accretions on a cable in a controlled environment is explained. Wet snow sleeves were experimentally reproduced by using this technique to study their shedding mechanism. A numerical modeling technique using nonlinear finite element analysis is proposed to evaluate the dynamic response of an overhead cable subjected to any snow-shedding scenario. A time function is associated to the mass
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17

Komaragiri, Shalini Sushmitha. "A SAG monitoring device based on a cluster of code-based GPS receivers : a thesis presented to the faculty of the Graduate School, Tennessee Technological University /." Click to access online, 2009. http://proquest.umi.com/pqdweb?index=0&did=2000377771&SrchMode=1&sid=2&Fmt=6&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1277472835&clientId=28564.

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18

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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19

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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20

Coneybeer, Robert T. "Transient thermal models for substation transmission components." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/17686.

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21

Lawson, Allan Brett. "Environmental impact assessment in the routing of high voltage overhead transmission lines : theory and practice in South Africa." Master's thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/16103.

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Includes bibliographies.<br>This study resulted from a perception held by the author that more attention is afforded to complying with the procedural elements of Environmental Impact Assessment (EIA) in South Africa, than to ensuring the validity of its technical content. The routing of high voltage overhead transmission lines provides a relevant field of study in which to address this perception. An initial literature review to contextualise the perceived problem showed that the questionable validity of the technical content of EIA was one of six shortcomings identified. To address the proble
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22

Bansal, Anurag. "Finite element simulation of mechanical characterization of composite insulators /." Full text open access at:, 1996. http://content.ohsu.edu/u?/etd,221.

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23

Urban, Rodney Gordon. "Power line corona noise prediction from small cage measurement." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50063.

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Thesis (PhD) -- Stellenbosch University, 2004.<br>Some digitised pages may appear illegible due to the condition of the original hard copy.<br>ENGLISH ABSTRACT: The radio noise (RN) performance of an AC high voltage transmission line is a determining factor when accessing the reliability of the design. The conducted RN level across the terminals of a PLC receiver, used in the teleprotection system of the line, is of particular concern. In this dissertation, existing empirical and semi-analytical RN prediction methods are evaluated by comparing the conducted RN levels of four South African
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24

Montanari, Allan Alves. "Religamento monopolar adaptativo rapido baseado na assinatura harmonica da tensão de arco secundario." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259603.

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Orientador: Maria Cristina Dias Tavares<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-13T12:17:57Z (GMT). No. of bitstreams: 1 Montanari_AllanAlves_M.pdf: 7585929 bytes, checksum: 4c00ba94f40e488cc4da50c4089e8630 (MD5) Previous issue date: 2009<br>Resumo: Este trabalho apresenta um esquema de religamento monopolar adaptativo rápido para otimizar o tempo compreendido entre a abertura e o religamento da fase sob falta. A proteção adaptativa recompõe rapidamente o sistema de transmissão de e
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25

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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26

Lee, Jack Monroe Jr. "Seasonal Patterns of Melatonin, Cortisol, and Progesterone Secretion in Female Lambs Raised Beneath a 500-kV Transmission Line." PDXScholar, 1992. https://pdxscholar.library.pdx.edu/open_access_etds/1317.

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There is ongoing controversy about the possibility of adverse biological effects from environmental exposures to electric and magnetic fields. These fields are produced by all electrical equipment and appliances including electrical transmission lines. The objective of this environmental science study was to investigate the possible effects of a high voltage transmission line on domestic sheep (Ovis aries L,), a species that can often be found near such lines. The study was primarily designed to determine whether a specific effect of electric and magnetic fields found in laboratory animals als
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27

Lustosa, Leonardo Silva. "Calculo dos parametros de linhas de transmissão trifasicas atraves das tensões e correntes em seus terminais." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260350.

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Orientadores: Jose Pissolato Filho, Sergio Kurokawa<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-14T06:30:33Z (GMT). No. of bitstreams: 1 Lustosa_LeonardoSilva_M.pdf: 1611174 bytes, checksum: 2c164206f95ffdeb84cf75eeff5c9f1b (MD5) Previous issue date: 2009<br>Resumo: O objetivo deste trabalho é calcular os parâmetros longitudinais e transversais de linhas de transmissão trifásica a partir das correntes e tensões nas fases das mesmas. Serão utilizadas equações desenvolvidas no domínio mod
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28

Krige, Ernst. "Harmonic interaction between weak AC systems and VSC-based HVDC schemes." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71704.

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Thesis (MScEng)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: The implementation of the Caprivi Link Interconnector (CLI) High Voltage Direct Current (HVDC) scheme in 2010 connecting the weak Namibian and Zambian Alternating Current (AC) transmission networks via overhead line is based on Voltage Source Converter (VSC) technology. This world-first combination of attributes presents a unique opportunity to study harmonic interaction between weak AC systems and VSC-based HVDC schemes. Relatively few publications exist that focus on AC and DC harmonic interaction and very few refer to VSC
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29

Mokeretla, Molungoa Samuel. "Self-damping characteristics of transmission line conductors subjected to free and forced vibration." Thesis, Bloemfontein : Central University of Technology, Free State, 2011. http://hdl.handle.net/11462/15.

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Thesis (M. Tech.) - Central University of Technology, Free State, 2011<br>The objectives of this research were to investigate and establish a procedure to determine the self-damping characteristics of transmission line conductors subjected to free and forced vibrations. The TERN and Aero-Z IEC62219-REV240609 conductor cables were the transmission line conductors that were readily available at the Vibration Research and Testing Centre (VTRC) of the University of KwaZulu-Natal (UKZN). The question to be answered was whether the self-damping characteristics of the TERN and Aero-Z IEC62219-REV
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30

Maralbashi-Zamini, Sona. "Developing neural network models to predict ice accretion type and rate on overhead transmission lines = Développement de réseaux de neurone[s] pour la prédiction du type et du taux de glace accumulée sur les lignes aériennes de transport d'énergie électrique /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2007. http://theses.uqac.ca.

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Thèse (M.Eng.) -- Université du Québec à Chicoutimi, 2007.<br>La p. de t. porte en outre: Mémoire présenté à l'Université du Québec à Chicoutimi comme exigence partielle de la maîtrise en ingénierie. CaQQUQ Bibliogr.: f. 100-107. Document électronique également accessible en format PDF. CaQQUQ
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31

Eskandarian, Mojtaba. "Ice shedding from overhead electrical lines by mechanical breaking : a ductile model for viscoplastic behaviour of atmospheric ice = Délestage de glace des câbles électriques par bris mécaniques : un modèle du comportement ductile viscoplastique de la glace atmosphérique poreuse /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2005. http://theses.uqac.ca.

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32

Yang, Yi. "Power line sensor networks for enhancing power line reliability and utilization." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41087.

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Over the last several decades, electricity consumption and generation have continually grown. Investment in the Transmission and Distribution (T&D) infrastructure has been minimal and it has become increasingly difficult and expensive to permit and build new power lines. At the same time, a growing increase in the penetration of renewable energy resources is causing an unprecedented level of dynamics on the grid. Consequently, the power grid is congested and under stress. To compound the situation, the utilities do not possess detailed information on the status and operating margins on their
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33

Groch, Matthew. "HV Transmission line and tower inspection safe-fly zone modelling and metrology." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85795.

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Thesis (MEng)-- Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: The deployment of Unmanned Aerial Vehicles (UAV) for power line inspection requires the definition of safe-fly zones. Transient Over-Voltages (TOVs) on the Overhead Transmission Lines (OHTLs) put the UAV at risk if it encroaches on these zones. In order to determine the safe-fly zones of a UAV in the vicinity of OHTLs, realistic full-scale experimental tests are done. Non-linearity in breakdown effects renders small-scale testing and computational work inaccurate. Experimental work is used to describe the close-up appro
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34

Paz, Marcos de Araujo. "Modelo reduzido de linhas de transmissão para transitorios eletromagneticos : aplicação de propriedades complexas." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260995.

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Orientador: Maria Cristina Dias Tavares<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e Computação<br>Made available in DSpace on 2018-08-07T13:37:43Z (GMT). No. of bitstreams: 1 Paz_MarcosdeAraujo_D.pdf: 6127820 bytes, checksum: 21f6dc485bcf097846769f086c2362ad (MD5) Previous issue date: 2005<br>Resumo: O objetivo deste trabalho é contribuir para o estudo de linhas de transmissão e o desenvolvimento de modelos de linhas voltados a programas do tipo EMTP. O trabalho desenvolvido consiste em aproveitar as propriedades e semelhanças dos modos não hom
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35

Du, Plessis Pieter. "Mechanical oscillations on overhead transmission lines." Thesis, 2014. http://hdl.handle.net/10210/10539.

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D.Ing. (Mechanical Engineering)<br>This research proposed to develop a mathematical model for the prediction of aeolian vibration levels on overhead transmission lines in order to be able to ensure that damping systems are designed optimally in future. In order to enhance the understanding of aeolian and wake-induced vibration further, it also proposed to implement and apply the fluid flow simulation technique of Computational Fluid Dynamics (CFD) to both single conductors and conductor bundles. The Introduction of the CFD tool to the field of transmission line vibration, will ensure that bund
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36

Al-Khalidi, Hassan. "Technical consideration and impact of converting overhead power lines to underground power cables." 2009. http://eprints.vu.edu.au/15231.

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37

Munilall, Anandran. "Design optimisation of bare conductors for overhead line applications." Thesis, 2009. http://hdl.handle.net/10413/8553.

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The South African economy is an emerging market and as such there is a continued and growing need for the efficient supply of cost effective electricity. The capital investment involved in the design, construction, installation and commissioning of overhead transmission line networks are high and so too are the subsequent maintenance and operation costs, incurred over their life cycle periods. The need to improve the electrical operating efficiency of existing and future electrical transmission networks, through the reduction of electrical losses, focused and motivated the research in this par
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Al-Khalidi, Hassan. "Technical consideration and impact of converting overhead power lines to underground power cables." Thesis, 2009. https://vuir.vu.edu.au/15231/.

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In the modern era, overhead transmission lines become irrelevant in the development of new cities as underground cables become mandatory. Nonetheless, it is crucial to understand overhead line technology in order to model the next generation of power networks, as most of the power networks still comprise overhead lines. This field of study was exposed to methodical and thorough research; there is a common perspective which is shared amongst multinational power engineers and researchers, that underground transmission cabling bestows mammoth improvements & benefits when compared to its predeces
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39

Badibanga, Kalombo Remy. "Life prediction of power line damper." Thesis, 2012. http://hdl.handle.net/10413/9173.

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Power line function is to transfer electrical power. Power lines represent a major component in the transport process of electricity and they are subjected to various types of failures. Causes of failure include wind-induced oscillations or Aeolian vibrations. Wind causes transmission line conductors to undergo oscillatory motions which cause failure. To mitigate oscillations of line conductors, Stockbridge dampers are used. It has been observed that dampers are subjected to the same undesirable and destructive effects from vibrations as the conductors they are meant to protect. In the case of
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Lü̈ssi, Kevin M. "A study and implementation analysis of an anti-sagging device for power transmission lines using shape memory alloys /." 2009. http://hdl.handle.net/10413/934.

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41

Mansingh, Sharan. "The development of a guideline to assist with compiling asset management plans for transmission lines." Thesis, 2010. http://hdl.handle.net/10413/3696.

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The overhead transmission line is a fundamental component in the power supply system as it links electricity supply to the various points on the electrical network. Failure of the transmission overhead line will result in interruption of supply and depending on the network configuration may result in long term outages. It is therefore essential that the overhead transmission line asset is inspected and maintained regularly to prevent premature failure. Newer approaches to maintenance management are required to improve the overhead transmission lines performance and reduce the cost and risk ass
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Sitei, McDonald Gregory. "The impact of overhead power lines on an informal settlement: Motsoaledi Village, Diepkloof (Soweto)." Thesis, 2009. http://hdl.handle.net/10210/1990.

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M.A.<br>Emergence of informal settlements on vacant lands in urban areas results from intuition and political decisions, and sometimes cultural background. So any available vacant land is used for settlement development and dwelling sites. An informal settlement named after Elias Motsoaledi, a political activist of the African National Congress (ANC), was developed in the south-western part of the city of Johannesburg in 1993. Motsoaledi informal settlement was established on a vacant piece of land where there are overhead power lines. Motsoaledi community members that have their dwellings in
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43

Jing-Nun, Lai, and 賴敬能. "Design and Evaluation of an Electric-Shock Alarm System for Cranes Approaching Overhead Power Lines." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/40172158538417664371.

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碩士<br>國立臺灣科技大學<br>電機工程技術研究所<br>85<br>The accident of mobile cranes touching overhead power lines is one of the main causes for worker injuries. A touching power-line alarm system has been developed for avoiding this kind of accidents. In this research, we design an alarm system with a digital function for setting detection coverage. Develop methods to calibrate and test the alarm function of the system. Evaluate possible outdoor interferences to the system. Design battery power monitoring and saving circuits. Also, test the alarm system both in laboratory and in outside field so that the perfo
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"A theoretical and experimental investigation into fire induced flashover of high voltage transmission lines." Thesis, 2005. http://hdl.handle.net/10413/2930.

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This thesis documents a research study of High Voltage transmission line faults induced by fire. Conductor to conductor and conductor to ground flashovers have been experienced by electricity utilities around the world under conditions of veld and sugar cane fires. These types of faults are unpredictable and negatively impact line reliability and quality of supply. This is a crucial problem when the revenue of the industry is sensitive to voltage dips. Electricity utilities have taken a preventative approach, like clearing vegetation from the line servitude in order to decrease the frequency o
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Nassereddine, Mohamad. "Analysis and design of high voltage transmission lines and substation earthing system." Thesis, 2015. http://hdl.handle.net/1959.7/uws:36371.

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The thesis covers numerous new findings for high voltage earthing system analysis and design including: soil resistivity structure, pole grid resistance measurements, soil voltage contour, overhead earth wire (OHEW) fault current distribution under finite and infinite conditions, and AC interference study using the superposition theorem. The importance of soil resistivity is highlighted when it comes to human safety, earth grid resistance and fault current distributions. Various approaches have been proposed to obtain accurate soil resistivity structure. The thesis defines the conditions for t
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Taylor, Victor. "Fault location on EHV lines using wideband spread spectrum techniques." Thesis, 1999. https://vuir.vu.edu.au/15711/.

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Electrical authorities require fast and accurate fault locators to protect tha quality of supply and reduce outage times. Spread spectrum techniques perform well in high noise environments such as power lines and their use in radar ranging is well known. Existing power line carrier (PLC) equipment may be used to transmit a direct sequence signal down a faulted EHV line. The fault position may then be calculated from correlation analysis of the reflected waveforms. In this thesis the fault location process has been simulated on a digital computer taking into account the frequency variation of
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"A study and implementation analysis of an anti-sagging device for power transmission lines using shape memory alloys." Thesis, 2010. http://hdl.handle.net/10413/764.

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48

Persadh, Ajith Koowarlall. "A study of pole top fires on 22kV wood pole power lines in KwaZulu-Natal." Thesis, 2007. http://hdl.handle.net/10413/2240.

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The majority of Eskom's 22kV lines use wood as the support structure material. The economics of wood pole cross arms and their flashover withstand capabilities outweigh those of steel cross arms. However, wood pole structures are vulnerable to what is known as a Pole Top Fire. When insulators and wood cross arms become polluted, small and sustained leakage currents flow along the surface of the insulator and thereafter into the wood itself. This eventually leads to burning of the wood. Many of the 22kV lines traverse vast rural lands, going over people's path ways. If this fire is not discover
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(9895157), T. Effeney. "Options and evaluation for the refurbishment of vibration damaged swer lines in Capricornia Electricity." Thesis, 1994. https://figshare.com/articles/thesis/Options_and_evaluation_for_the_refurbishment_of_vibration_damaged_swer_lines_in_Capricornia_Electricity/13456985.

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Capricornia Electricity has an extensive Single Wire Earth Return (SWER) rural distribution network. As this SWER network ages, service problems resulting from excessive uncontrolled aeolian vibration are becoming apparent. In some SWER schemes the failure of hand ties and associated hardware is widespread. In the worst affected areas, there is evidence of damage to the aluminium wires in the ACSR conductor. As the current accepted practice is to reconductor these damaged lines, Capricornia Electricity is faced with major refurbishment costs. This thesis describes the investigative work under
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50

Naidoo, Kribashen. "Bird streamer initiated breakdowns under HVDC conditions." Thesis, 2007. http://hdl.handle.net/10413/2231.

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Abstract:
This dissertation describes the role played by bird streamers in transmission line faults under HVDC conditions. The research was initiated due to the lack of knowledge of these faults under HVDC conditions. An explanation as to what bird streamers faults are, the role they play in the breakdown of air-gaps and a means of preventing bird streamer caused faults from occurring is made Experimental work has been carried out in order to gain an understanding of these faults under HVDC conditions. The overall aim of the experiments was to find a horizontal distance (protected zone) on an HVDC tower
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