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Thèses sur le sujet « Monitoring overhead »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 19 juillet 2025

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1

Ritzmann, Deborah. "Synchrophasor-based overhead line impedance monitoring." Thesis, University of Reading, 2017. http://centaur.reading.ac.uk/74320/.

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Thermal limits of overhead transmission lines create network constraints that can result in curtailment of renewable energy generation. Thermal limits are conventionally static and based on worst-case, non-cooling ambient weather conditions, leading to under-utilization of overhead lines. Utilization can be increased and network constraints reduced by rating overhead lines dynamically, based on actual conductor temperature. Installation and maintenance of temperature and weather sensors along an overhead line is expensive and laborious. A more cost-effective solution is to derive average condu

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Batty, Eric Richard. "A novel transmission line monitoring method." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326654.

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Hussin, Mohd Fahmi. "Voltage transducer for fault monitoring on high voltage overhead lines." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/65731/.

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Overhead lines are the backbone of electrical power transmission. In most cases, the overhead line provides the best economic and practical solution for energy transmission. Nevertheless, overhead lines suffer more faults due to the vulnerability of the overhead lines to adverse weather condition, transient overvoltage and falling trees. An extensive literature review of existing condition monitoring and impulse a voltage measurement technique of overhead lines are covered in this work, and ultimately leads to the development of the proposed voltage transducer. Although conventional transducer

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4

Ochoa, Gallardo Ricardo. "Reducing post-silicon coverage monitoring overhead with emulation and statistical analysis." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54393.

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With increasing design complexity, post-silicon validation has become a critical problem. In pre-silicon validation, coverage is the primary metric of validation effectiveness, but in post-silicon, the lack of observability makes coverage measurement problematic. On-chip coverage monitors are a possible solution, where a coverage monitor is a hardware circuit that sets to one when the coverage event of interest occurs. However, prior research has shown that the overhead is prohibitive for anything beyond a small number of coverage monitors. In this thesis, I explore techniques that reduce the

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5

Habtemariam, Filmon A. "HIGH-FREQUENCY IMPEDANCE CHARACTERISTICS AND HEALTH CONDITION MONITORING OF OVERHEAD POWER LINES." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1472735633.

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Lindberg, Elisabeth. "The overhead line sag dependence on weather parameters and line current." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-168528.

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As the demand for energy increases, as well as the demand for renewable energy, Vattenfall, as network owner, receives many requests to connect new wind power to the grid. The limiting factor for how much wind power that can be connected to the grid is in this case the maximum current capacity of the overhead lines that is based on a line temperature limit. The temperature limit is set to ensure a safety distance between the lines and the ground. This master thesis project is a part of a research project at Vattenfall Research and Development that is examining the possibilities of increasing t

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7

Robson, Stephen. "An integrated monitoring and communication device for use on 11 kV overhead lines." Thesis, Cardiff University, 2012. http://orca.cf.ac.uk/42930/.

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In this thesis, an integrated monitoring device for use on 11 kV overhead lines has been developed. Uniquely, the devices use an optimised form of Power Line Communication to enable a low latency communication network. It is shown that such a network is able to facilitate new and improved applications and offer tangible benefits to the network operator.

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CORNEJO, OLIVARES OSCAR EDUARDO. "In-The-Field Monitoring of Interactive Applications." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2019. http://hdl.handle.net/10281/241251.

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Le tecniche di monitoraggio possono estrarre dati accurati sul comportamento dei sistemi software. Se utilizzati nel campo, possono rivelare come le applicazioni si comportano in contesti del mondo reale e come i programmi sono effettivamente esercitati dai loro utenti. Tuttavia, la raccolta, l'elaborazione e la distribuzione dei dati sul campo devono essere eseguiti senza interruzioni e in modo non invasivo mentre gli utenti interagiscono con le loro applicazioni. Per limitare l'intrusività del monitoraggio sul campo, un approccio comune consiste nel ridurre la quantità di dati raccolti (

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9

Najafi, Syed Ahmed Ali. "Energy Harvesting From Overhead Transmission Line Magnetic Fields." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1548448189459464.

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10

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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van, Rensburg Karel Jensen. "Analysis of arcing faults on distribution lines for protection and monitoring." Thesis, Queensland University of Technology, 2003. https://eprints.qut.edu.au/15800/1/Karel_van_Rensburg_Thesis.pdf.

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This thesis describes an investigation into the influences of arcing and conductor deflection due to magnetic forces on the accuracy of fault locator algorithms in electrical distribution networks. The work also explores the possibilities of using the properties of an arc to identify two specific types of faults that may occur on an overhead distribution line. A new technique using the convolution operator is introduced for deriving differential equation algorithms. The first algorithm was derived by estimating the voltage as an array of impulse functions while the second algorithm was derive

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van, Rensburg Karel Jensen. "Analysis of arcing faults on distribution lines for protection and monitoring." Queensland University of Technology, 2003. http://eprints.qut.edu.au/15800/.

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This thesis describes an investigation into the influences of arcing and conductor deflection due to magnetic forces on the accuracy of fault locator algorithms in electrical distribution networks. The work also explores the possibilities of using the properties of an arc to identify two specific types of faults that may occur on an overhead distribution line. A new technique using the convolution operator is introduced for deriving differential equation algorithms. The first algorithm was derived by estimating the voltage as an array of impulse functions while the second algorithm was derive

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13

Černín, Kamil. "Reconstruction of conductor movement and monitoring of high voltage lines." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218765.

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Tahle práce se zabývá monitorováním venkovních vysokonapěťových vedeních, což mohou být vedení od 70kV do 400kV. Senzory jsou umístěny na vodiči a hlavní myšlenkou je vyhodnotit mechanické chování vodičů, a to od nízkých frekvencí (zlomky Hz) až po vysoké frekvence (desítky Hz). Tahle práce se zabývala pohyby o nízkých frekvencích a vysokých amplitudách a popsala možnosti sestavení těchto pohybů na základě měření ze senzorů. Konkrétně se jedná o pohyby v případě silného větru, zkratu, opadávání ledu nebo dalších. Všechno tohle pomáhá operátorů dělat rozhodnutí ohledně provozování sítí. Vývoj z

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14

Козловський, О. А., А. Е. Орлович, О. А. Kozlovskyi та A. Yu Orlovich. "Діагностування ожеледно-паморозевих відкладень на повітряних лініях сучасними засобами". Thesis, Ексклюзив-Систем, 2017. http://dspace.kntu.kr.ua/jspui/handle/123456789/7526.

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Розглянуто друге покоління систем моніторингу стану повітряних ліній електропередавання в умовах ожеледоутворення. Режимні заходи щодо захисту повітряних ліній від ожеледно-паморозевих відкладень та зменшення втрат на корону доцільно проводити з урахуванням поточної інформації про стан повітряних ліній.The second generation of the information monitoring system of overhead powerlines in the conditions of ice formation is considered. Regular measures to protect air lines from ice-frost deposits and reduction of the coronar losses are advisable to take into account current information on the stat

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15

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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16

Kolacia, Tomáš. "Měření elektrických veličin v distribučních sítích 22 kV a 0,4 kV s disperzními zdroji." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221196.

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This thesis concerns monitoring in Middle- and Low-Voltage distribution systems penetrated by distributed generation. Monitoring itself means measuring voltages and power flows and sending relevant data to the supervisory system. The first part of the thesis describes distribution systems with differences between individual voltage levels. The following chapter is focused on consequences of high share of renewable energy sources in distribution systems. Most of the problems are partially resolved by technical conditions for connection of the new power sources. However, difficulties with voltag

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Козловський, Олександр Антонович. "Підвищення ефективності експлуатації повітряних ліній розподільних електричних мереж в умовах ожеледоутворення". Thesis, Центральноукраїнський національний технічний університет, 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/30700.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.14.02 – електричні станції, мережі і системи. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2017. Дисертація присвячена дослідженню проблемних питань, пов'язаних із розробкою інформаційних систем моніторингу стану повітряних ліній в умовах ожеледоутворення, що забезпечують зниження відмов у електропостачанні шляхом надання електротехнічному персоналу завчасної інформації про момент ожеледоутворення. У роботі представлено критичний аналіз існуючих систем моніторингу ожеле

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Козловський, Олександр Антонович. "Підвищення ефективності експлуатації повітряних ліній розподільних електричних мереж в умовах ожеледоутворення". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/30699.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.14.02 – електричні станції, мережі і системи. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2017. Дисертація присвячена дослідженню проблемних питань, пов'язаних із розробкою інформаційних систем моніторингу стану повітряних ліній в умовах ожеледоутворення, що забезпечують зниження відмов у електропостачанні шляхом надання електротехнічному персоналу завчасної інформації про момент ожеледоутворення. У роботі представлено критичний аналіз існуючих систем моніторингу ожелед

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19

Hahne, Linnea. "Studie över klimatförändringars påverkan på dynamisk ledningskapacitet." Thesis, Uppsala universitet, Elektricitetslära, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-445456.

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The thesis aims to examine the impact of climate change on line rating and to investigate the possibility of a potential increase of capacity of an overhead line. The line rating of an overhead line determines how much current can be transmitted in the line. The weather parameters which affect the line rating are ambient temperature, solar radiation, wind speed, and wind direction. If the line rating is adapted to weather conditions, it is important to be able to predict how the weather will change in the future. Therefore, the impact of climate change on weather parameters is investigated. Th

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Mallangi, Siva Sai Reddy. "Low-Power Policies Based on DVFS for the MUSEIC v2 System-on-Chip." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229443.

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Multi functional health monitoring wearable devices are quite prominent these days. Usually these devices are battery-operated and consequently are limited by their battery life (from few hours to a few weeks depending on the application). Of late, it was realized that these devices, which are currently being operated at fixed voltage and frequency, are capable of operating at multiple voltages and frequencies. By switching these voltages and frequencies to lower values based upon power requirements, these devices can achieve tremendous benefits in the form of energy savings. Dynamic Voltage a

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21

Wu, Chun Wah Wallace. "Methods for Reducing Monitoring Overhead in Runtime Verification." Thesis, 2013. http://hdl.handle.net/10012/7215.

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Runtime verification is a lightweight technique that serves to complement existing approaches, such as formal methods and testing, to ensure system correctness. In runtime verification, monitors are synthesized to check a system at run time against a set of properties the system is expected to satisfy. Runtime verification may be used to determine software faults before and after system deployment. The monitor(s) can be synthesized to notify, steer and/or perform system recovery from detected software faults at run time. The research and proposed methods presented in this thesis aim to reduc

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TAO, HOU-YEH, and 陶厚燁. "Low-overhead Network Monitoring Algorithms for Software Defined Networking." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/x94bw8.

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碩士<br>國立臺灣科技大學<br>資訊工程系<br>107<br>With the growing of network services on the internet, quality of service and perfor-mance evaluation are critical issues for service provider. With regard to service runningnormally that need to monitor the network status. Network monitoring is an importantpart of network management, which collects flow statistics on the network for traffic en-gineering, flow re-routing, and attack detection. However, network monitoring may causelarge bandwidth overhead and long processing delay on switches. With monitoring de-mand, we need to have more efficiency and lower

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Chiu, Huan-Chieh, and 邱奐絜. "An IoT-based Sag Monitoring System for Overhead Transmission Lines." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/d8mx2v.

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碩士<br>國立臺灣大學<br>生物產業機電工程學研究所<br>106<br>For power companies around the world, transmission efficiency and power grid safety are two of the most important issues. The importance of the power grid safety goes without saying, after witnessing the impacts of a few power outages, such as the Northeast blackout of 2003, the 729 and 815 blackouts in Taiwan, and the 2012 India blackouts. The safety, efficiency and flexibility of high/extra-high voltage transmission lines can be improved by conducting real-time analyses on the parameters relating to the directly monitored transmission lines and their su

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Lin, Bo-Ting, and 林柏廷. "Research of Increasing Transmission Capacity with Overhead Transmission Line Real-Time Monitoring System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/31421640544687723967.

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碩士<br>國立中興大學<br>電機工程學系所<br>101<br>Because of economic growth and incremental power demand, the construction of transmission lines needs to keep up with electricity growth except increasing power generation. In rising public opinion period, it is not easy to construct new overhead transmission line. Therefore, the best solution is to increase original transmission line''s capacity. Following the rapid development of information and internet technology, a way to increase transmission capacity both economically and rapidly has been developed. By installing real-time monitoring system in

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