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Дисертації з теми "Cable terminations"

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1

Butler, Ethan L. (Ethal Landis). "Design and testing of vibration absorbing oceanographic cable terminations." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/40577.

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2

Hathaway, Graham Michael. "High temperature superconducting power cable termination." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301206.

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3

Gabrail, Philip, and Sam Samuelsson. "Analys av fältfördelning i kabelavslut av linjära och icke linjära material : Analysis of the field distribution in cable termination by linear and nonlinear material." Thesis, KTH, Data- och elektroteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-188414.

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Анотація:
I nuläget används XLPE högspänningskablar vid överföring och distribution av elkraft och har en viktig roll i elsystemet. Kraftöverföring som sker över långa sträckor kopplas vidare från en punkt till en annan och sker med hjälp av kabelavslutningar. Dessa kabelavslutningar har en del sårbarheter ”felfunktion i kabelavslut” som påverkar hela elkraftsystemet. En analys och simulering av fältfördelning i kabelavslut genomfördes genom en teoretisk-respektive praktisk del i rapporten. Den teoretiska delen av rapporten genomfördes med hjälp av FEM programmet Comsol Multiphysics. Resultaten visade a
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4

Hamedi, Emilia. "Electrical connection for aluminium conductors in automotive applications : Prestudy of available solutions for electrical connection methods of aluminium cables." Thesis, KTH, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-212545.

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Due to increasing weight of electrical component and wiring harnesses in a vehicle contrary to the demand of light constructed vehicles as well as the constantly increasing and fluctuating price of copper compared to aluminium’s stable and far lower price, the use of aluminium conductors as an alternative have been promoted.  This thesis work lay theoretical research of the available methods used for electrical connection of aluminium conductors in order to increase the knowledge about the available termination techniques.  Due to aluminium’s characteristics such as lower conductivity and stre
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5

Bas, Gokcen. "Electric Field Analysis In Stress Controlled High Voltage Cables." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12605778/index.pdf.

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Анотація:
The terminations and the joints are the basic accessories of the power cables. Power cables require electrical stress control when terminated. Since there are different types of terminations, the analysis should be done to choose the proper method for electric field control problem at the terminations. Throughout this study two different types of termination methods are investigated by using the finite element analysis program (ANSYS): Stress Controlled Termination Model with Deflector and Stress Control Tube (SCT). The results are compared with those obtained for a cable without stress contro
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6

Marzio, Enrico. "Accessori per sistemi in cavo nella trasmissione dell'energia elettrica in HVDC: definizione di modelli fisici per la caratterizzazione di materiali isolanti, semiconduttivi e varioresistivi." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11769/.

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Анотація:
Lo studio intrapreso si è posto come obiettivo la caratterizzazione dal punto di vista elettrico dei materiali coinvolti nella realizzazione di accessori per applicazioni in HVDC, in particolare mescole isolanti, semiconduttive e varioresistive. La necessità di un lavoro di questo tipo viene giustificata dalla costante espansione dei sistemi in DC nella trasmissione dell’energia elettrica, i quali presentano caratteristiche fisiche che si differenziano sensibilmente da quelle tipiche dei tradizionali sistemi in AC, dunque richiedono componenti e materiali opportunamente progettati per garanti
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7

Pelikán, Luděk. "Měření částečných výbojů u vysokonapěťových kabelů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-376964.

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The main topic of this work is the analysis of the measurement of partial discharge measurements on high voltage cables. The thesis also deals with other measurements, including the measurement of the loss factor and the voltage retention and breakdown test. Part of the text describes the issue of partial discharge, its measurement by galvanic method and methods of elimination of disturbing influences that affect this method in terms of sensitivity and accuracy of the measured values. Thesis also describes the construction of the cables, their marking and the tests carried out on them. There i
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8

Ching-ShanLin and 林清山. "Electrical Field Simulation for Improper Installation of Cable Terminations." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/23164130522110946474.

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碩士<br>國立成功大學<br>電機工程學系專班<br>98<br>The purpose of this thesis is to study improper installation works for 15kV prefabricated type, heat shrinkable tubes and 25kV cold shrinkable tubes of cable terminations. By the finite element method (FEM), COMSOL multiphysics software tool to simulate electrical field effect to cable terminations under knife cut, wrong positioning and water contain sunken conditions. The following conclusions were got from simulation results,: (1) The knife cut sunken in cable termination may caused partial discharging after power on. (2) The wrong positioning sunken may cau
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9

Lee, Cheng-Hung, and 李政鴻. "Study on Connection Defects and Electric Stress of Underground Cable Terminations." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/40105101861522051946.

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碩士<br>崑山科技大學<br>電機工程研究所<br>98<br>For safety and pleasant city out looking reasons, the underground-type transmission/distribution system was widely adopted by TPC in recent years. Especially more and more 69kV~345kV level electricity power by HV underground power cables are supplied to city center through connection stations. The connection technique becomes an important topic of power system reliability. This thesis focuses on the 161 XLPE underground power cables. Firstly, the structure of power cable and electric stress are studied. Then the connection method for terminations of power cable
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10

Banerjee, Sarajit. "A Study of High Frequency Voltage Effects in Medium Voltage Cable Terminations." Thesis, 2008. http://hdl.handle.net/10012/3729.

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Анотація:
High-power voltage sourced converters(VSC’s) are becoming increasingly prevalent in modern transmission systems. These systems primarily use switching schemes generating kHz range harmonics, which may be magnified by one or more system resonances. Despite the high frequency harmonics, VSC systems widely use insulated equipment designed for operation at power frequencies; this includes critical substation components such as medium voltage polymeric cables and terminations. The stress grading systems of non-geometric (compact) cable terminations are susceptible to insulation degradation and e
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11

Su, Wei-Kang, and 蘇維康. "Electrical Field Distribution Simulation in Cable Termination." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/14915381477611595701.

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Анотація:
碩士<br>國立成功大學<br>電機工程學系專班<br>97<br>This thesis with cold-shrink 25kV cable terminal connector components as the main structure, used finite element analysis method to simulate the following situations (1) with different thickness of stress relief material (2) with different relative permittivity of stress relief material, (3) different geometries of the stress cone , (4) of a grounding embedded electrode to monitor effects of electrical stress grading. And in accordance with simulation results to take the best way to improve the electrical stress. All simulations completed by COMSOL Multiphysi
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12

Haikali, Elizabeth NN. "Time-evolution of partial discharge characteristics of XLPE MV cable termination defects." Thesis, 2018. https://hdl.handle.net/10539/27315.

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A dissertation submitted in fulfilment of the requirements for the degree of Master of Science in Engineering to the Faculty of Engineering and the Built Environment, School of Electrical and Information Engineering, University of the Witwatersrand, Johannesburg, 2018<br>Power cable terminations and joints experience high electrical stress due to the abrupt change in geometry of the cable; hence the insulation at these points is more prone to partial discharges and has been reported as the main root cause of power cable system failures. Electrical failure of the insulation is known to occur d
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13

Fynes-Clinton, Daniel. "PD characteristics of typical MV XLPE power cable termination defects at VLF and power frequency test voltages." Thesis, 2016. http://hdl.handle.net/10539/21149.

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Анотація:
A research report submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, in ful lment of the requirements for the degree of Master of Science in Engineering. June 2016<br>It has been reported in literature that newly installed cable accessories can pass typical commissioning tests and yet show signi cant PD activity leading to premature failure in the long term. This research report details the partial discharge (PD) characterisation of three arti cial defects in MV cable terminations, at both power and very low frequency (VLF). The defects
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14

Patel, Utkarsh. "The Impact of Harmonics on the Power Cable Stress Grading System." Thesis, 2012. http://hdl.handle.net/10012/6761.

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Анотація:
With the continuous growth of non-linear power electronic components and the increasing penetration of the distributed generation (DG), the potential for degradation in the power quality of the existing grid exists. There are concerns that the total harmonic distortion (THD) could reach unacceptable levels of 5% or higher. Moreover, there is additional potential of the presence of amplified harmonic components in the power network grid when the harmonic frequencies align with the resonant frequencies that are being injected by power electronic components of the DG. The above conditions could i
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15

"A New Look at Designing Electrical Construction Processes A Case Study of Cable Pulling and Termination Process on Data Center Construction Sites." Master's thesis, 2020. http://hdl.handle.net/2286/R.I.57248.

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Анотація:
abstract: At least 30 datacenters either broke ground or hit the planning stages around the United States over the past two years. On such technically complex projects, Mechanical, Electrical and Plumbing (MEP) systems make up a huge portion of the construction work which makes data center market very promising for MEP subcontractors in the next years. However, specialized subcontractors such as electrical subcontractors are struggling to keep crews motivated. Due to the hard work involved in the construction industry, it is not appealing for young workers. According to The Center for Construc
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