Relevant bibliographies by topics / Transmission Line Insulators

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Transmission Line Insulators'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 September 2023

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Journal articles on the topic "Transmission Line Insulators"

1

Dolník, Bystrík, Ľuboš Šárpataky, Iraida Kolcunová, and Peter Havran. "Sensing Method Using Multiple Quantities for Diagnostic of Insulators in Different Ambient Conditions." Sensors 22, no. 4 (February 11, 2022): 1376. http://dx.doi.org/10.3390/s22041376.

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Insulators are one of the many components responsible for the reliability of electricity supply as part of transmission and distribution lines. Failure of the insulator can cause considerable economic problems that are much greater than the insulator cost. When the failure occurs on the transmission line, a large area can be without electricity supply or other transmission lines will be overloaded. Because of the consequences of the insulator’s failure, diagnostics of the insulator plays a significant role in the reliability of the power supply. Basic diagnostic methods require experienced personnel, and inspection requires moving in the field. New diagnostic methods require online measurement if it is possible. Diagnostic by measuring the leakage current flowing on the surface of the insulator is well known. However, many other quantities can be used as a good tool for diagnostics of insulators. We present in this article results obtained on the investigated porcelain insulators that are one of the most used insulation materials for housing the insulator’s core. Leakage current, dielectric loss factor, capacity, and electric charge are used as diagnostic quantities to investigate porcelain insulators in different pollution conditions and different ambient relative humidity. Pollution and humidity are the main factors that decrease the insulator´s electric strength and reliability.
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Zhang, Zhaoyun, Hefan Chen, and Shihong Huang. "Detection of Missing Insulator Caps Based on Machine Learning and Morphological Detection." Sensors 23, no. 3 (January 31, 2023): 1557. http://dx.doi.org/10.3390/s23031557.

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Missing insulator caps are the key focus of transmission line inspection work. Insulators with a missing cap will experience decreased insulation and mechanical strength and cause transmission line safety accidents. As missing insulator caps often occur in glass and porcelain insulators, this paper proposes a detection method for missing insulator caps in these materials. First, according to the grayscale and color characteristics of these insulators, similar characteristic regions of the insulators are extracted from inspection images, and candidate boxes are generated based on these characteristic regions. Second, the images captured by these boxes are input into the classifier composed of SVM (Support Vector Machine) to identify and locate the insulators. The accuracy, recall and average accuracy of the classifier are all higher than 90%. Finally, this paper proposes a processing method based on the insulator morphology to determine whether an insulator cap is missing. The proposed method can also detect the number of remaining insulators, which can help power supply enterprises to evaluate the degree of insulator damage.
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Shen, Weihao. "Simulation Research on Electric Field Distribution of Insulator String in ULTRA High Voltage Transmission Line." Journal of Physics: Conference Series 2108, no. 1 (November 1, 2021): 012024. http://dx.doi.org/10.1088/1742-6596/2108/1/012024.

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Abstract Insulators are one of the important components of overhead transmission lines. Because of their excellent characteristics, insulators have obvious advantages in the selection of external insulation in UHV AC transmission projects. The potential distribution of insulator string is not even due to the shape characteristics of insulator string, the structure of metal tool, the low conductivity of silicon rubber material and the stray capacitance between insulator string and wire, iron tower and metal tool. When the surface field intensity of insulators and fittings exceeds the initial field intensity, corona discharge will occur, which will affect the electromagnetic environment and the operation characteristics of insulating materials. Therefore, it is of great significance to determine the potential distribution of insulator strings of UHV transmission lines for detecting low and zero value insulators, implementing voltage equalization measures effectively, and ensuring the safe and stable operation of transmission lines. Based on Ansys software of 500kv transmission line insulator string, this paper establishes a three-dimensional model, the method of using finite element numerical simulation respectively with no equalizing ring and equalizing ring in both cases the umbrella skirt on simulation, the distribution of electric field along the roots, and further studies the equalizing ring the effect of different parameters on the electric field distribution. Finally, an optimal solution is established.
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Nie, Yi Xiong, Xian Gang Peng, and Xiao Ning Xu. "Research on the Detection of Faulty Insulator Strings." Advanced Materials Research 301-303 (July 2011): 895–901. http://dx.doi.org/10.4028/www.scientific.net/amr.301-303.895.

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A series of experiments on the corona current pulse appearing on insulators under various contamination conditions with AC voltage of different amplitude are described. The corona current pulses were found to follow the Gaussian distribution and can be used to distinguish the faulty insulators from normal insulator strings in transmission line. The probability formulas about the corona current pulses have been studied in detail. They can be used as a kind of criterions to detect the faulty insulators. With several established fuzzy membership functions of humidity and contamination through data from experiments, it is proved that the insulation state could be estimated from the transmission line insulator strings by the fuzzy logical reasoning. This method has been verified in the laboratory by simulating work conditions of insulator strings on an 110kV transmission line and has the advantage of safety and convenience.
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Lei, Ting, Zhiwen Xie, Ke Wang, Liqiang Zhong, and Dekai Chen. "Control and application of ultra-high voltage insulator cleaning and detecting robot." Journal of Physics: Conference Series 2087, no. 1 (November 1, 2021): 012044. http://dx.doi.org/10.1088/1742-6596/2087/1/012044.

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Abstract With the development of global energy Internet and demand for UHV transmission, uHV transmission lines will increase rapidly and become more and more important for national economic development. The uHV transmission lines will increase year by year and become increasingly important to the economic development of the country. It is necessary to study the cleaning and detection technology of transmission line insulators that the insulators of UHVDC transmission lines such as large leakage rate, low detection efficiency and difficult cleaning of insulators. Therefore, the development of uhv transmission line insulator hot-line cleaning robot and detection integration has important engineering significance and practical value to improve the level of the operation of the uhv power transmission engineering maintenance, safe and reliable operation of the protection of uhv transmission lines. In this paper, the research on the integrated robot for live cleaning and detection of uHV transmission line insulators will greatly promote the live operation of UHV transmission lines in China. It can be directly applied to the live operation of UHV DC and can be promoted nationwide.
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Ma, Yunpeng, Qingwu Li, Lulu Chu, Yaqin Zhou, and Chang Xu. "Real-Time Detection and Spatial Localization of Insulators for UAV Inspection Based on Binocular Stereo Vision." Remote Sensing 13, no. 2 (January 11, 2021): 230. http://dx.doi.org/10.3390/rs13020230.

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Unmanned aerial vehicles (UAVs) have become important tools for power transmission line inspection. Cameras installed on the platforms can efficiently obtain aerial images containing information about power equipment. However, most of the existing inspection systems cannot perform automatic real-time detection of transmission line components. In this paper, an automatic transmission line inspection system incorporating UAV remote sensing with binocular visual perception technology is developed to accurately detect and locate power equipment in real time. The system consists of a UAV module, embedded industrial computer, binocular visual perception module, and control and observation module. Insulators, which are key components in power transmission lines as well as fault-prone components, are selected as the detection targets. Insulator detection and spatial localization in aerial images with cluttered backgrounds are interesting but challenging tasks for an automatic transmission line inspection system. A two-stage strategy is proposed to achieve precise identification of insulators. First, candidate insulator regions are obtained based on RGB-D saliency detection. Then, the skeleton structure of candidate insulator regions is extracted. We implement a structure search to realize the final accurate detection of insulators. On the basis of insulator detection results, we further propose a real-time object spatial localization method that combines binocular stereo vision and a global positioning system (GPS). The longitude, latitude, and height of insulators are obtained through coordinate conversion based on the UAV’s real-time flight data and equipment parameters. Experiment results in the actual inspection environment (220 kV power transmission line) show that the presented system meets the requirement of robustness and accuracy of insulator detection and spatial localization in practical engineering.
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Ma, Yunpeng, Qingwu Li, Lulu Chu, Yaqin Zhou, and Chang Xu. "Real-Time Detection and Spatial Localization of Insulators for UAV Inspection Based on Binocular Stereo Vision." Remote Sensing 13, no. 2 (January 11, 2021): 230. http://dx.doi.org/10.3390/rs13020230.

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Unmanned aerial vehicles (UAVs) have become important tools for power transmission line inspection. Cameras installed on the platforms can efficiently obtain aerial images containing information about power equipment. However, most of the existing inspection systems cannot perform automatic real-time detection of transmission line components. In this paper, an automatic transmission line inspection system incorporating UAV remote sensing with binocular visual perception technology is developed to accurately detect and locate power equipment in real time. The system consists of a UAV module, embedded industrial computer, binocular visual perception module, and control and observation module. Insulators, which are key components in power transmission lines as well as fault-prone components, are selected as the detection targets. Insulator detection and spatial localization in aerial images with cluttered backgrounds are interesting but challenging tasks for an automatic transmission line inspection system. A two-stage strategy is proposed to achieve precise identification of insulators. First, candidate insulator regions are obtained based on RGB-D saliency detection. Then, the skeleton structure of candidate insulator regions is extracted. We implement a structure search to realize the final accurate detection of insulators. On the basis of insulator detection results, we further propose a real-time object spatial localization method that combines binocular stereo vision and a global positioning system (GPS). The longitude, latitude, and height of insulators are obtained through coordinate conversion based on the UAV’s real-time flight data and equipment parameters. Experiment results in the actual inspection environment (220 kV power transmission line) show that the presented system meets the requirement of robustness and accuracy of insulator detection and spatial localization in practical engineering.
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Tong, Jie, Zhi Gen Xiao, Qiang Gao, and Yang Wang. "Research on Detection of Transmission Line Porcelain Insulator Based on Infrared Technology." Advanced Materials Research 1046 (October 2014): 200–204. http://dx.doi.org/10.4028/www.scientific.net/amr.1046.200.

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With the continuous development of infrared technology, infrared-based detection and diagnosis technology has become a new modern power equipment detection technology. Based on infrared technology, this paper proposed detection and diagnosis method of the transmission line porcelain insulators, including analysis on detection theory of IR imaging sensor, and infrared imaging map introduction. Through establishing porcelain insulator circuit calculation model, computing heating power of trouble insulators, this paper minutely analyzed the heating causes of trouble insulators. The paper provided a reference to the detection of transmission line porcelain insulators, which made it an important measure to ensure the safety and economic operation of electrical equipment.
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Wang, Xianri, and Xinmin Yu. "Research on corrosion protection of earthing device of electric transmission line." E3S Web of Conferences 136 (2019): 04057. http://dx.doi.org/10.1051/e3sconf/201913604057.

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The selection of insulator is analyzed and studied in detail in combination with climate and pollution.In this paper, several comparison and selection schemes are studied in detail from the aspects of electrical performance, mechanical performance, economic performance and so on. Through the analysis of the whole life cycle and the combination of the actual situation of the project, the reasonable selection of insulators is carried out to make use of insulators to reach the optimal.
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Xu, Changbao, Mingyong Xin, Yu Wang, and Jipu Gao. "Design and Implementation of Transmission Line Insulator Online Monitoring Platform Based on Image Analysis." Journal of Physics: Conference Series 2427, no. 1 (February 1, 2023): 012034. http://dx.doi.org/10.1088/1742-6596/2427/1/012034.

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Abstract The safe operation of insulators directly determines the safety level and reliability of the entire system. In this paper, digital image processing technology is used to analyze and process insulator images, and the performance of composite insulators is comprehensively evaluated from three aspects: degree of deterioration, surface pollution, and degree of water repellency, which is used as the basis for judging insulator detection. For this purpose, an insulator online monitoring system based on telemetry image analysis is specially designed to determine the degree of aging, surface pollution, and hydrophobicity of insulators and to conduct practical tests. At the same time, the system can realize the offline operation of the insulator live, avoid the danger of climbing and live trial operation, and ensure the personal safety of power maintenance personnel. The system hardware uses advanced integration technology and high-performance and reliable equipment. The software is developed using popular development tools, is simple to operate, and has important engineering value.
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Dissertations / Theses on the topic "Transmission Line Insulators"

1

Mohd, Noor Mohd Junaizee. "Application of knowledge-based fuzzy inference system on high voltage transmission line maintenance." Thesis, Queensland University of Technology, 2004. https://eprints.qut.edu.au/16050/1/Mohd_Junaizee_Mohd_Noor_Thesis.pdf.

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A majority of utilities conduct maintenance of transmission line components based on the results of routine visual inspection. The inspection is normally done by inspectors who detect defects by visually checking transmission line components either from the air (in helicopters), from the ground (by using high-powered binoculars) or from the top of the structure (by climbing the structure). The main problems with visual inspection of transmission lines are that the determination of the defects varies depending on the inspectors' knowledge and experience and that the defects are often reported qualitatively using vague and linguistic terms such as "medium crack", "heavy rust", "small deflection". As a result of these drawbacks, there is a large variance and inconsistency in defect reporting (which, in time, makes it difficult for the utility to monitor the condition of the components) leading to ineffective or wrong maintenance decisions. The use of inspection guides has not been able to fully address these uncertainties. This thesis reports on the application of a visual inspection methodology that is aimed at addressing the above-mentioned problems. A knowledge-based Fuzzy Inference System (FIS) is designed using Matlab's Fuzzy Logic Toolbox as part of the methodology and its application is demonstrated on utility visual inspection practice of porcelain cap and pin insulators. The FIS consists of expert-specified input membership functions (representing various insulator defect levels), output membership functions (indicating the overall conditions of the insulator) and IF-THEN rules. Consistency in the inspection results is achieved because the condition of the insulator is inferred using the same knowledge-base in the FIS rather than by individual inspectors. The output of the FIS is also used in a mathematical model that is developed to suggest appropriate component replacement date. It is hoped that the methodology that is introduced in this research will help utilities achieve better maintenance management of transmission line assets.
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Mohd, Noor Mohd Junaizee. "Application of knowledge-based fuzzy inference system on high voltage transmission line maintenance." Queensland University of Technology, 2004. http://eprints.qut.edu.au/16050/.

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A majority of utilities conduct maintenance of transmission line components based on the results of routine visual inspection. The inspection is normally done by inspectors who detect defects by visually checking transmission line components either from the air (in helicopters), from the ground (by using high-powered binoculars) or from the top of the structure (by climbing the structure). The main problems with visual inspection of transmission lines are that the determination of the defects varies depending on the inspectors' knowledge and experience and that the defects are often reported qualitatively using vague and linguistic terms such as "medium crack", "heavy rust", "small deflection". As a result of these drawbacks, there is a large variance and inconsistency in defect reporting (which, in time, makes it difficult for the utility to monitor the condition of the components) leading to ineffective or wrong maintenance decisions. The use of inspection guides has not been able to fully address these uncertainties. This thesis reports on the application of a visual inspection methodology that is aimed at addressing the above-mentioned problems. A knowledge-based Fuzzy Inference System (FIS) is designed using Matlab's Fuzzy Logic Toolbox as part of the methodology and its application is demonstrated on utility visual inspection practice of porcelain cap and pin insulators. The FIS consists of expert-specified input membership functions (representing various insulator defect levels), output membership functions (indicating the overall conditions of the insulator) and IF-THEN rules. Consistency in the inspection results is achieved because the condition of the insulator is inferred using the same knowledge-base in the FIS rather than by individual inspectors. The output of the FIS is also used in a mathematical model that is developed to suggest appropriate component replacement date. It is hoped that the methodology that is introduced in this research will help utilities achieve better maintenance management of transmission line assets.
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Ahmed, Ibrahim Saad M. "Voltage breakdown in polluted insulators." Thesis, University of Exeter, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236513.

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Alles, Joan. "Investigations on flashover of polluted insulators : Influence of silicone coating on the behavior of glass insulators under steep front impulse." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEC058.

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Cette thèse s’inscrit dans le cadre de l’amélioration du comportement électrique des isolateurs de lignes haute tension ; l’objectif est d’assurer une meilleure fiabilité et qualité d’alimentation en énergie électrique. Ce travail a été motivé par la nécessité de répondre à trois questions liées au comportement des isolateurs verre en zone polluée. La première porte sur la recherche d’une méthode permettant de calculer la tension de contournement des chaînes polluées selon le type d’isolateur et ses caractéristiques. La deuxième question concerne la différence de comportement entre les isolateurs en verre et les isolateurs en porcelaine de type « outerrib » ; ce type d’isolateurs présente une forme spécifique adaptée aux environnements à forte pollution. Les tensions de contournement ainsi que les trajectoires de l’arc sur les isolateurs en verre sont très différentes de celles observées avec les isolateurs en porcelaine. Et la troisième question est relative à la défaillance des isolateurs recouverts de silicone lors des essais en chocs (des impulsions de tension) à front raide. En effet, les isolateurs recouverts d’une couche de 0.3 mm (ou plus) de silicone hydrophobe explosent lorsqu’ils sont soumis à des impulsions de tension à front raide d’amplitude très élevée pendant un temps très court. Différents mécanismes pouvant être à l’origine de l’explosion/éclatement des isolateurs recouverts d’une couche de silicone sont discutés. Il ressort des différents tests et analyses que le mécanisme le plus probable semble être la fragmentation par plasma. En effet, suite à l’application d’une tension à front raide, d’amplitude très élevée, des canaux (fissures) microscopiques prennent naissance là où le champ électrique est le plus intense. L’application répétitive des chocs de tension conduit au développement de décharges dans ces canaux (rupture diélectrique de l’air) c’est-à-dire des arcs (canaux de plasma) qui se développent/propagent dans le volume de l’isolateur. La puissance déchargée (c’est-à-dire l’énergie stockée dans les condensateurs du générateur en des temps très courts) dans ces canaux à chaque choc étant très élevée, elle conduit à l’explosion de l’isolateur après quelques chocs (parfois 5 ou 6 suffisent): c’est la fragmentation par plasma
This thesis deals with the improvement of the electrical behavior of insulators of high voltage lines; the objective is to ensure better reliability and quality of power supply. This work was motivated by the need to answer three questions related to the behavior of glass insulators in polluted areas. The first one concerns the search for method for calculating the flashover voltage of polluted chains according to the type of insulator and its characteristics. The second question concerns the difference in behavior between glass insulators and "outerrib" porcelain insulators; this type of insulator has a specific shape adapted to environments with high pollution. The flashover voltages as well as the trajectories of the arc on glass insulators are very different from those observed with porcelain insulators. And the third issue is the failure of silicon-coated insulators during shock tests (pulses) with a steep front. Indeed, insulators coated with a layer of 0.3 mm (or more) of hydrophobic silicone explode when subjected to very high amplitude steep-edge voltage pulses for a very short time. Different mechanisms that may be responsible for the explosion / puncturing of insulators covered with a layer of silicone are discussed. It appears from the various tests and analyzes that the most probable mechanism seems to be plasma fragmentation (cracking). Indeed, following the application of a steep front voltage, of very high amplitude, microscopic channels (fissures) originate where the electric field is most intense. The repetitive application of impulse voltages (shocks) leads to the development of discharges in these channels (breakdown of the air), i.e.; arcs (plasma channels) which develop / propagate in the volume of the insulator. The discharged power (i.e.; the energy stored in the capacitors of the generator in a very short times) in these channels (cracks) at each shock being very high, leads to the explosion of the insulator after some shocks (5 to 6 sometimes): it is the fragmentation by plasma or plasma cracking
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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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DIAS, Bruno Albuquerque. "Simulação computacional da poluição biológica em isoladores de vidro." Universidade Federal de Campina Grande, 2017. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/476.

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Submitted by Lucienne Costa (lucienneferreira@ufcg.edu.br) on 2018-04-24T16:40:39Z No. of bitstreams: 1 BRUNO ALBUQUERQUE DIAS – DISSERTAÇÃO (PPGEE) 2017.pdf: 3277136 bytes, checksum: 1277dbc3bda9c5d90497f95d8bf94878 (MD5)
Made available in DSpace on 2018-04-24T16:40:39Z (GMT). No. of bitstreams: 1 BRUNO ALBUQUERQUE DIAS – DISSERTAÇÃO (PPGEE) 2017.pdf: 3277136 bytes, checksum: 1277dbc3bda9c5d90497f95d8bf94878 (MD5) Previous issue date: 2017-03-17
CNPq
O acúmulo de poluentes na superfície dos isoladores, que compõem as linhas de transmissão, permite a formação de uma camada de substâncias que, sob incidência de névoa, chuva ou orvalho, produzem soluções condutoras. Na região norte do Brasil, muitos casos de poluição biológica são caracterizados como limo, associação de microalgas e fungos, a resistência dielétrica da superfície do isolador, nestes casos, é reduzida, causando falhas no sistema elétrico. Para investigar o efeito dessa poluição sobre os isoladores, o presente trabalho apresenta um modelo computacional que relaciona o aspecto visual do limo no isolador (intensidade, forma e local) com a sua corrente de fuga obtida por simulação e correlaciona eficiência da simulação com experimentos em laboratório. Os objetos de teste utilizados foram isoladores de disco de vidro, limpos e poluídos com limo. Os isoladores contaminados foram retirados da subestação de Guamá, Pará, Brasil e os experimentos realizados no Laboratório de Alta Tensão da Universidade Federal de Campina Grande, na Paraíba. As simulações computacionais utilizam o Método dos Elementos Finitos e, assim como as medições laboratoriais, foram realizadas para diferentes condições de umidade, uma vez que essa variável tem influência significativa na condutividade do limo. A simulação se mostrou eficiente e os resultados apresentados mostram que é possível estimar a corrente de fuga desse tipo de isolador sob diferentes condições de umidade e diferentes níveis de poluição.
The accumulation of pollutants on surface of insulators allows the formation of a layer of substances that, with mist, rain or dew, produces conductive solutions. The surface dielectric strength, in these cases, is reduced, causing failures in electrical system. In the northern region of Brazil, many cases of biological pollution are characterized as slimes, association of microalgae and fungi. To investigate the effect of this pollution on the insulators, the present work presents a computational model that relates the visual aspect of slime in the insulator (intensity, shape and location) with its leakage current obtained by simulation and correlates efficiency of the simulation with laboratory experiments. Test objects used were glass disk insulators, cleaned and polluted with slime. The contaminated insulators were removed from the Guamá Substation, Pará, Brazil and the tests performed at the High Voltage Laboratory of Federal University of Campina Grande in Paraíba, Brazil. Computational simulations using Finite Element Method and, as well as the laboratory measurements, were performed for different humidity conditions since this variable has a significant influence on slime conductivity. The simulation proved to be efficient and the presented results show that it is possible to estimate leakage current of this type of insulator under different humidity conditions and different levels of pollution.
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Hobdell, Stephen Barry. "Thermally stimulated current and electrokinetic investigations of HV cable models." Thesis, Bangor University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311421.

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Flazi, Samir. "Etude du contournement electrique des isolateurs haute tension pollues : critere d'elongation de la decharge et dynamique du phenomene." Toulouse 3, 1987. http://www.theses.fr/1987TOU30266.

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Etude de l'aspect statique du contournement, on montre experimentalement que les criteres de wilkins et hampton ne s'appliquent qu'au modele d'obenaus. Mise en evidence de l'importance du champs electrique au voisinage de la decharge. Etude detaillee de la conduction electrolytique et de son evolution pendant le contournement
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9

Temocin, Engin Ufuk. "Design And Implementation Of Microwave Lumped Components And System Integration Using Mems Technology." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607519/index.pdf.

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This thesis presents the design and fabrication of coplanar waveguide to microstrip transitions and planar spiral inductors, and the design of metal-insulator-metal capacitors, a planar band-pass, and a low-pass filter structures as an application for the inductors and capacitors using the RF MEMS technology. This thesis also includes a packaging method for RF MEMS devices with the use of benzocyclobutene as bonding material. The transition structures are formed by four different methods between coplanar waveguide end and microstrip end, and they are analyzed in 1-20 GHz. Very low loss transitions are obtained by maintaining constant characteristic impedance which is the same as the port impedance through the transition structures. The planar inductors are formed by square microstrip spirals on a glass substrate. Using the self-inductance propery of a conductive strip and the mutual inductance between two conductor strips in a proper arrangement, the inductance value of each structure is defined. Inductors from 0.7 nH up to 20 nH have been designed and fabricated. The metal-insulator-metal capacitors are formed by two coplanar waveguide structures. In the intersection, one end of a coplanar waveguide is placed on top of the end of the other coplanar waveguide with a dielectric layer in between. Using the theory of parallel plate capacitors, the capacitance of each structure is adjusted by the dimensions of the coplanar waveguides, which obviously adjust the area of intersection. Capacitors from 0.3 pF up to 9.8 pF have been designed. A low-pass filter and a band-pass filter are designed using the capacitors and inductors developed in this thesis. In addition to lumped elements, the interconnecting transmission lines, junctions and input-output lines are added to filter topologies. The RF MEMS packaging is realized on a coplanar waveguide structure which stands on a silicon wafer and encapsulated by a silicon wafer. The capping chip stands on the BCB outer ring which promotes adhesion and provides semi hermeticity. Keywords: Transition between transmission lines, planar spiral inductor, metal-insulator-metal capacitor, RF MEMS packaging, surface micromachining.
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10

PISSOLATO, FILHO JOSE. "Analyse du contournement d'une surface faiblement conductrice par une decharge electrique alimentee en courant continu." Toulouse 3, 1986. http://www.theses.fr/1986TOU30048.

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Comparaison des differentes modelisations electriques du systeme decharge-surface polluee utilisees dans l'etude du contournement des isolateurs. Utilisant un modele de laboratoire ou la pollution est representee par un canal rempli d'electrolyte, on a releve les valeurs de la tension de contournement en fonction de la resistance lineique du canal. Pour les resistances lineiques superieures a 7 kiloohms par centimetre, c'est le modele de rao et gopal qui est le mieux adapte; au-dessous, c'est le modele de wilkins dans lequel on poste les constantes de la decharge mesurees dans la vapeur d'eau. Nouvelle modelisation permettant de calculer, en fonction du temps, l'elongation de la decharge et le courant fourni par la source
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Books on the topic "Transmission Line Insulators"

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IEEE Power Engineering Society. Transmission and Distribution Committee., American National Standards Institute, Institute of Electrical and Electronics Engineers., and IEEE Standards Board, eds. IEEE standard for zinc-coated ferrous insulator clevises for overhead line construction. New York, N.Y., USA: Institute of Electrical and Electronics Engineers, 1998.

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C135.20-1998 IEEE Standard for Zinc-Coated Ferrous Insulator Clevises for Overhead Line Construction. Inst of Elect & Electronic, 1999.

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Book chapters on the topic "Transmission Line Insulators"

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Zhao, Jinxiong, Jiaxiu Ma, Junwei Xin, and Rutai An. "Application of Yolov5 Algorithm in Identification of Transmission Line Insulators." In Mobile Multimedia Communications, 880–87. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-89814-4_65.

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Mukhopadhyaya, Keka. "A Review on Insulators in Transmission Line—Progress and Comparative Studies." In ICT Analysis and Applications, 179–91. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-5655-2_17.

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Cao, Jianrong, Shuo Shang, Ming Wang, and Yuan Zhuang. "A Novel Defect Detection Method for Insulators of Power Transmission Line Based on YOLOv5." In Communications in Computer and Information Science, 135–46. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-8915-5_12.

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Mitev, Bojan, Monika Fidanchevska, Marko Naseski, Kristina Miceva, and Atanas Kochov. "Modeling and Simulation of High-Voltage Transmission Line Insulators in a Virtual and Laboratory Environment." In Machine and Industrial Design in Mechanical Engineering, 483–90. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-88465-9_47.

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Wu, Hong, Shitao Liu, Jinpeng Hao, Ziyi Fang, Kai Yang, and Guohua Yang. "Research on Pollution Accumulation Characteristics of Different Materials Insulators on Transmission Line in Heavy Pollution Area." In Lecture Notes in Electrical Engineering, 1361–70. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-0357-3_138.

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Zhao, Zhongqi, Qing He, Sixuan Dai, and Qiongshuang Tang. "Improved YOLOX Transmission Line Insulator Identification." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 186–99. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-31733-0_17.

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Zhao, Jingjing, Xingtong Liu, Jixiang Sun, and Lin Lei. "Detecting Insulators in the Image of Overhead Transmission Lines." In Lecture Notes in Computer Science, 442–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31588-6_57.

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Löwe, Jens-Michael, Michael Kempf, and Volker Hinrichsen. "Mechanical and Electrical Phenomena of Droplets Under the Influence of High Electric Fields." In Fluid Mechanics and Its Applications, 355–72. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09008-0_18.

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Abstract:
AbstractHigh-voltage composite insulators are specially designed to withstand different environmental conditions to ensure a reliable and efficient electric power distribution and transmission. Especially, outdoor insulators are exposed to rain, snow or ice, which might significantly affect the performance of the insulators. The interaction of sessile water droplets and electric fields is investigated under various boundary conditions. Besides the general behavior of sessile droplets, namely the deformation and oscillation, the inception field strength for partial discharges is examined depending on the droplet volume, strength and frequency of the electric field and the electric charge. Particularly, the electric charge is identified to significantly affect the droplet behavior as well as the partial discharge inception field strength. In addition to ambient conditions, the impact of electric fields on ice nucleation is investigated under well-defined conditions with respect to the temperature and electric field strength. High electric field strengths are identified to significantly promote ice nucleation, especially in case of alternating and transient electric fields. Different influencing factors like the strengths, frequencies and time constants of the electric fields are investigated. Consequently, the performed experiments enhance the knowledge of the behavior of water droplets under the impact of electric fields under various conditions.
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Wronkowicz, Angelika. "Vision Diagnostics of Power Transmission Lines: Approach to Recognition of Insulators." In Advances in Intelligent Systems and Computing, 431–40. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26227-7_40.

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Yang, Yanqing, Jianxu Mao, Hui Zhang, Yurong Chen, Hang Zhong, Zhihong Huang, and Yaonan Wang. "Semi-supervised Cloud Edge Collaborative Power Transmission Line Insulator Anomaly Detection Framework." In Lecture Notes in Computer Science, 210–21. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-87355-4_18.

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Conference papers on the topic "Transmission Line Insulators"

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Georgopoulos, Dimitri, Kumar Kishor, and Jeff Fraser. "Optimization of Transmission Line Structures Using Braced Post Insulators." In Electrical Transmission and Substation Structures 2022. Reston, VA: American Society of Civil Engineers, 2022. http://dx.doi.org/10.1061/9780784484463.032.

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Guo, Tao, Wei Wang, Heng Yang, and Xinxing Yuan. "Research on live line auto-testing technology for transmission line insulators." In 3rd International Conference on Mechatronics, Robotics and Automation. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/icmra-15.2015.85.

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Park, Joon-young, Byung-hak Cho, and Seung-hyun Byun. "Development of Automatic Cleaning Robot for Live-line Insulators." In ESMO 2006 - 2006 IEEE 11th International Conference on Transmission & Distribution Construction, Operation and Live-Line Maintenance. IEEE, 2006. http://dx.doi.org/10.1109/tdcllm.2006.340726.

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Cho, Byung-hak, Seung-hyun Byun, Joon-young Park, and Jin-seok Korea. "Development of Automatic Inspection Robot for Live-line Insulators." In ESMO 2006 - 2006 IEEE 11th International Conference on Transmission & Distribution Construction, Operation and Live-Line Maintenance. IEEE, 2006. http://dx.doi.org/10.1109/tdcllm.2006.340743.

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Gu, Chunhui, Jiangtao Li, Meng Li, Leizhou Zhang, Wei Zhang, Qiaogen Zhang, Zhiyin Qian, Rong Xiao, and Chenzhao Fu. "Study on Contamination Deposition Characteristics of Transmission Line Insulators." In 2011 Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2011. http://dx.doi.org/10.1109/appeec.2011.5748879.

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Jean, Charles, and Reginald Weiser. "Transmission Line and Substation Insulators Asset Health and Preventive Maintenance." In 2022 IEEE/PES Transmission and Distribution Conference and Exposition (T&D). IEEE, 2022. http://dx.doi.org/10.1109/td43745.2022.9816873.

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"Energized Line Working with Polymer Insulators for Voltages 60kV and above." In ESMO 2006 - 2006 IEEE 11th International Conference on Transmission & Distribution Construction, Operation and Live-Line Maintenance. IEEE, 2006. http://dx.doi.org/10.1109/tdcllm.2006.340725.

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Bashir, N., and H. Ahmad. "Ageing of transmission line insulators: The past, present and future." In 2008 IEEE 2nd International Power and Energy Conference (PECon). IEEE, 2008. http://dx.doi.org/10.1109/pecon.2008.4762440.

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Pham Hong, T., and Tran Van Top. "Electrical field behavior of transmission line insulators in polluted area." In 2008 International Symposium on Electrical Insulating Materials (ISEIM). IEEE, 2008. http://dx.doi.org/10.1109/iseim.2008.4664475.

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Yang, Yueguang, Yukang Hang, Zezhong Sun, Lei Gao, Yuyang Zhang, Tianjun Si, and Hailiang Lu. "Aging Performance Evaluation of Composite Insulators for EHV Transmission Line." In 2020 IEEE 4th Conference on Energy Internet and Energy System Integration (EI2). IEEE, 2020. http://dx.doi.org/10.1109/ei250167.2020.9346852.

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