Relevant bibliographies by topics / High Voltage Cable Insulation

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Academic literature on the topic 'High Voltage Cable Insulation'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 September 2023

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Journal articles on the topic "High Voltage Cable Insulation"

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Yahya, Muhammad Bin, and Muhammad Nazrolni Azmi Bin Izani. "Cable Test and Breakdown Voltage Determination of Joysense Cable Insulation." Indonesian Journal of Electrical Engineering and Computer Science 8, no. 1 (October 1, 2017): 177. http://dx.doi.org/10.11591/ijeecs.v8.i1.pp177-183.

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Cross-linked Polyethylene (XLPE) has been used as the insulation for polymeric power cables for its superior advantages. This type of cable insulation are famously known and used for their good dielectric properties, mechanical properties, thermal properties, and probability to be utilized at high temperature. This study is of four (4) parts; designing suitable method for cable test, accelerated testing procedures applied to XLPE insulation for high voltage cables, online partial discharge determination, and aging test. To study the insulation durability to AC high voltage operation, the breakdown strength and aging were investigated under different setting of temperature. The breakdown voltages of XLPE were measured at different temperatures of 30<sup>0</sup>C, 50<sup>0</sup>C and finally at 70<sup>0</sup>C. Lastly, the aging effect of cable insulation was observed by conducting the AC breakdown voltage test after the aging process. Results showed that the breakdown voltage and aging of XLPE cables will decrease with increase of temperature setting.<em> </em>
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Jörgens, Christoph, and Markus Clemens. "Electric Field and Temperature Simulations of High-Voltage Direct Current Cables Considering the Soil Environment." Energies 14, no. 16 (August 11, 2021): 4910. http://dx.doi.org/10.3390/en14164910.

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For long distance electric power transport, high-voltage direct current (HVDC) cable systems are a commonly used solution. Space charges accumulate in the HVDC cable insulations due to the applied voltage and the nonlinear electric conductivity of the insulation material. The resulting electric field depends on the material parameters of the surrounding soil environment that may differ locally and have an influence on the temperature distribution in the cable and the environment. To use the radial symmetry of the cable geometry, typical electric field simulations neglect the influence of the surrounding soil, due to different dimensions of the cable and the environment and the resulting high computational effort. Here, the environment and its effect on the resulting electric field is considered and the assumption of a possible radial symmetric temperature within the insulation is analyzed. To reduce the computation time, weakly coupled simulations are performed to compute the temperature and the electric field inside the cable insulation, neglecting insulation losses. The results of a weakly coupled simulation are compared against those of a full transient simulation, considering the insulation losses for two common cable insulations with different maximum operation temperatures. Due to the buried depth of HV cables, an approximately radial symmetric temperature distribution within the insulation is obtained for a single cable and cable pairs when, considering a metallic sheath. Furthermore, the simulations show a temperature increase of the earth–air interface above the buried cable that needs to be considered when computing the cable conductor temperature, using the IEC standards.
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Diban, Bassel, and Giovanni Mazzanti. "The Effect of Insulation Characteristics on Thermal Instability in HVDC Extruded Cables." Energies 14, no. 3 (January 21, 2021): 550. http://dx.doi.org/10.3390/en14030550.

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This paper aims at studying the effect of cable characteristics on the thermal instability of 320 kV and 500 kV Cross-Linked Polyethylene XLPE-insulated high voltage direct-current (HVDC) cables buried in soil for different values of the applied voltages, by the means of sensitivity analysis of the insulation losses to the electrical conductivity coefficients of temperature and electric field, a and b. It also finds the value of dielectric loss coefficient βd for DC cables, which allows an analytical calculation of the temperature rise as a function of insulation losses and thermal resistances. A Matlab code is used to iteratively solve Maxwell’s equations and find the electric field distribution, the insulation losses and the temperature rise inside the insulation due to insulation losses of the cable subjected to load cycles according to CIGRÉ Technical Brochure 496. Thermal stability diagrams are found to study the thermal instability and its relationship with the cable ampacity. The results show high dependency of the thermal stability on the electrical conductivity of cable insulating material, as expressed via the conductivity coefficients of temperature and electric field. The effect of insulation thickness on both the insulation losses and the thermal stability is also investigated.
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Hadi, Nabipour Afrouzi, Zulkurnain Abdul-Malek, Saeed Vahabi Mashak, and A. R. Naderipour. "Three-Dimensional Potential and Electric Field Distributions in HV Cable Insulation Containing Multiple Cavities." Advanced Materials Research 845 (December 2013): 372–77. http://dx.doi.org/10.4028/www.scientific.net/amr.845.372.

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Cross-linked polyethylene is widely used as electrical insulation because of its excellent electrical properties such as low dielectric constant, low dielectric loss and also due to its excellent chemical resistance and mechanical flexibility. Nevertheless, the most important reason for failure of high voltage equipment is due to its insulation failure. The electrical properties of an insulator are affected by the presence of cavities within the insulating material, in particular with regard to the electric field and potential distributions. In this paper, the electric field and potential distributions in high voltage cables containing single and multiple cavities are studied. Three different insulating media, namely PE, XLPE, and PVC was modeled. COMSOL software which utilises the finite element method (FEM) was used to carry out the simulation. An 11kV underground cable was modeled in 3D for better observation and analyses of the generated voltage and field distributions. The results show that the electric field is affected by the presence of cavities in the insulation. Furthermore, the field strength and uniformity are also affected by whether cavities are radially or axially aligned, as well as the type of the insulating solid. The effect of insulator type due the presence of cavities was seen most prevalent in PVC followed by PE and then XLPE.
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Li, Chao, Lin Lin, and Weidong Qu. "Study on insulation performance optimization of EMU high-voltage equipment box." Journal of Physics: Conference Series 2195, no. 1 (February 1, 2022): 012040. http://dx.doi.org/10.1088/1742-6596/2195/1/012040.

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Abstract The EMU high-voltage electrical equipment on the roof not only bears the erosion of various harsh and extreme environments, but also bears the impact of various over-voltage, and the insulation performance of the electrical equipment on the roof is seriously threatened. This paper studies the insulation optimization design method of EMU high-voltage electrical equipment, puts forward the method of adding a certain length of insulating sheath on the electrical equipment to improve the insulation performance of high-voltage equipment box, and tests the insulation optimization measures on high-voltage circuit breaker and EMU high-voltage cable. The result shows that the installation of insulating sheath is feasible to improve the insulation performance of EMU high-voltage equipment box.
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Tarko, Rafał, Jakub Gajdzica, Wiesław Nowak, and Waldemar Szpyra. "Study of the Lightning Overvoltage Protection Effectiveness of High Voltage Mixed Overhead Cable Power Lines." Energies 14, no. 8 (April 20, 2021): 2329. http://dx.doi.org/10.3390/en14082329.

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In this paper, the effectiveness of lightning overvoltage protection of cables in high voltage overhead cable lines has been analyzed. Because of the high overvoltage level, the cables are protected by surge arresters and by metallic sheath earthing. However, in practice, quite a lot of cases of electricity-evoked damage to the cable outer sheaths are observed, proving that the effectiveness of the protection used is insufficient. As a result, the cables are exposed to environmental factors, especially moisture penetration, which contributes to cable degradation. To explain the causes of this situation, simulation studies were carried out to determine the relevant factors affecting the level of expected overvoltages. The circuit-field model of the overhead cable line in EMTP-ATP, COMSOL and MATLAB software was used for determining overvoltages on the main cable insulation and the outer protective sheath. The studies reveal that the efficiency of the cable insulation overvoltage protection is ensured regardless of the lightning strike location and the crest value of its current. However, the obtained results confirm that no matter the applied protection, the cable outer sheaths may be exposed to overvoltages with higher values than those of the main insulation. Although the analysis was performed for 110 kV lines, the conclusions are general and are also applicable to power lines with higher rated voltages.
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Fu, Wenjun, Ying Xu, and Yan Gao. "A Study on Insulation Monitoring Technology of High-Voltage Cables in Underground Coal Mines Based on Decision Tree." Computational Intelligence and Neuroscience 2022 (May 23, 2022): 1–14. http://dx.doi.org/10.1155/2022/2247017.

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The insulation state of high-voltage cables in coal mines directly influences the reliability of power supply in coal mines and the level of safe production. In this paper, the degradation mechanism of cable insulation is analyzed, and an online monitoring technology of cable insulation in coal mines based on decision tree is proposed, the technical principle of the judgment method of cable degradation based on decision tree is studied, the feasibility of this technology is verified through simulation, the existing online monitoring solutions for cable insulation are analyzed, and a wide-area synchronous measurement and monitoring system for cable insulation is designed. This technology has been applied in Chinese coal mine enterprises in China and achieved a good effect.
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Nguen, Ty. "INDUCED VOLTAGES CREATED BY A HIGH-VOLTAGE CABLE." Modern Technologies and Scientific and Technological Progress 2020, no. 1 (June 16, 2020): 219–20. http://dx.doi.org/10.36629/2686-9896-2020-1-219-220.

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The results of modeling the effects of a high-voltage cable with cross-linked polyethylene insulation on adjacent power lines are presented. The calculations of the induced voltage on the adjacent voltage line were performed for five modes of operation of the 110 kV cable: symmetric and four unbalanced, caused by short circuits between the conductors, as well as between the conductors and the screen.
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Zarubin, V. S., G. N. Kuvyrkin, and I. Yu Savelyeva. "Temperature State of the Electrical Insulation Layer of a Superconducting DC Cable with Double-Sided Cooling." Herald of the Bauman Moscow State Technical University. Series Natural Sciences, no. 4 (97) (August 2021): 71–85. http://dx.doi.org/10.18698/1812-3368-2021-4-71-85.

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For the reliable operation of a high-voltage DC cable with high-temperature superconducting current-carrying conductors with a sufficiently high difference in electrical potentials, it is necessary to maintain a fixed temperature state not only of the conductors but also of other cable elements, including the electrical insulation layer. In this layer, despite the high electrical resistivity of its material, which can be polymer dielectrics, Joule heat is released. The purpose of this study was to build a mathematical model that describes the temperature state of an electrical insulation layer made in the form of a long hollow circular cylinder, on the surfaces of which a constant potential difference of the electric field is set. Within the study, we consider an alternative design of a cable with central and external annular channels for cooling liquid nitrogen. Using a mathematical model, we obtained integral relations that connect the parameters of the temperature state of this layer, the conditions of heat transfer on its surfaces, and the temperature-dependent coefficient of thermal conductivity and electrical resistivity of an electrical insulating material with a given difference in electrical potentials. A quantitative analysis of integral relations is carried out as applied to the layer of electrical insulation of the superconducting cable. The results of the analysis make it possible to assess the possibilities of using specific electrical insulating materials in cooled high-voltage DC cables under design, including superconducting cables cooled with liquid nitrogen
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Jörgens, Christoph, and Markus Clemens. "Modeling the electric field at interfaces and surfaces in high-voltage cable systems." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 39, no. 5 (May 8, 2020): 1099–111. http://dx.doi.org/10.1108/compel-01-2020-0041.

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Purpose In high-voltage direct current (HVDC) cable systems, space charges accumulate because of the constant applied voltage and the nonlinear electric conductivity of the insulating material. The change in the charge distribution results in a slowly time-varying electric field. Space charges accumulate within the insulation bulk and at interfaces. With an operation time of several years of HVDC systems, typically the stationary electric field is of interest. The purpose of this study is to investigate the influence of interfaces on the stationary electric field stress and space charge density. Design/methodology/approach An analytic description of the stationary electric field inside cable insulation is developed and numerical simulations of a cable joint geometry are applied, considering spatial variations of the conductivity in the vicinity of the electrodes and interfaces. Findings With increasing conductivity values toward the electrodes, the resulting field stress decreases, whereas a decreasing conductivity results in an increasing electric field. The increased electric field may cause partial discharge, resulting in accelerated aging of the insulation material. Thus, interfaces and surfaces are characterized as critical areas for the reliability of HVDC cable systems. Research limitations/implications This study is restricted to stationary electric field and temperature distributions. The electric field variations during a polarity reversal or a time-varying temperature may result in an increased electric conductivity and electric field at interfaces and surfaces. Originality/value An analytical description of the electric field, considering surface effects, is developed. The used conductivity model is applicable for cable and cable-joint insulations, where homo- and hetero-charge effects are simulated. These simulations compare well against measurements.
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Dissertations / Theses on the topic "High Voltage Cable Insulation"

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Bialek, Thomas Owen. "Evaluation and modeling of high-voltage cable insulation using a high-voltage impulse." Diss., Mississippi State : Mississippi State University, 2005. http://library.msstate.edu/content/templates/?a=72.

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Cariou-Saintemarie, Nathalie. "Initiation of electrical degradation in high voltage polymeric cable insulation : electroluminescence detection." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342808.

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Ariffin, Azrul Mohd. "The measurement and modelling of electroluminescence in high voltage polymeric cable insulation materials." Thesis, University of Southampton, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494683.

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Since space charge plays a significant role in long-term electrical degradation of polymeric insulation in high voltage cables, there is growing interest in the measurement of the energy dissipation of mobile and trapped charges in the dielectric molecules. The dissipation process is associated with the emission of visible photons, a process known as electroluminescence (EL) and can be used, potentially, as an indicator for the inhibition of electrical ageing of insulation. This thesis is based on an investigation into the occurrence of EL in dielectric materials as a result of applying high ac stresses. The phenomenon has been observed and analyzed for different types of thin polymeric films using a charge coupled device (CCD) detection system. This unique experimental setup enables a range of measurements to be performed including the imaging of EL, its temporal behaviour, spectral analysis and phase-resolved measurements using the same detector. The effects of several factors such as the types of material under study and local gas environment have been assessed based on the results obtained. Previously, different research groups have monitored the occurrence of EL under ac conditions by applying a sinusoidal electric field across the polymer but in this project, the emission is also examined under the influence of triangular and square voltage waveforms, together with their asymmetrical counterparts. In addition to this, a dynamic bipolar charge recombination model has been developed in order to simulate studies of EL under an alternating field. By comparing experimental results with the stimulation, the theories relating to the processes responsible for the occurrence of EL have been evaluated and a good agreement was found between the simulation and experimental results.
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Freye, Claudius [Verfasser], Frank [Akademischer Betreuer] Jenau, and Thomas [Gutachter] Leibfried. "Methoden und Aspekte zur Leitfähigkeitsanalyse von Isolationsmaterialien der Kabeltechnologie und zur Isolationskoordination für Systeme der Hochspannungsgleichstromübertragung (HGÜ) : Methods and aspects for conductivity analysis of insulating materials in cable technology and for insulation coordination in high-voltage direct current transmission (HVDC) systems / Claudius Freye ; Gutachter: Thomas Leibfried ; Betreuer: Frank Jenau." Dortmund : Universitätsbibliothek Dortmund, 2020. http://d-nb.info/1214887627/34.

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Pallon, Love. "Polyethylene/metal oxide nanocomposites for electrical insulation in future HVDC-cables : probing properties from nano to macro." Doctoral thesis, KTH, Polymera material, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-193591.

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Nanocomposites of polyethylene and metal oxide nanoparticles have shown to be a feasible approachto the next generation of insulation in high voltage direct current cables. In order to reach an operationvoltage of 1 MV new insulation materials with reduced conductivity and increased breakdown strengthas compared to modern low-density polyethylene (LDPE) is needed.In this work polyethylene MgO nanocomposites for electrical insulation has been produced andcharacterized both from an electrical and material perspective. The MgO nanoparticles weresynthesized into polycrystalline nanoparticles with a large specific surface area (167 m2 g–1). Meltprocessing by extrusion resulted in evenly dispersed MgO nanoparticles in LDPE for the silane surfacemodified MgO as compared to the unmodified MgO. All systems showed a reduction in conductivityby up to two orders of magnitude at low loading levels (1–3 wt.%), but where the surface modifiedsystems were able to retain reduced conductivity even at loading levels of 9 wt.%. A maximuminteraction radius to influence the conductivity of the MgO nanoparticles was theoretically determinedto ca. 800 nm. The interaction radius was in turn experimentally observed around Al2O3 nanoparticlesembedded in LDPE using Intermodulation electrostatic force microscopy. By applying a voltage on theAFM-tip charge injection and extraction around the Al2O3 nanoparticles was observed, visualizing theexistence of additional localized energy states on, and around, the nanoparticles. Ptychography wasused to reveal nanometre features in 3D of electrical trees formed under DC-conditions. Thevisualization showed that the electrical tree grows by pre-step voids in front of the propagatingchannels, facilitating further growth, much in analogy to mechanical crack propagation (Griffithconcept). An electromechanical effect was attributed as possible mechanism for the formation of the voids.
Nanokompositer av polyeten och metalloxidpartiklar anses vara möjliga material att använda i morgondagens isolationshölje till högspänningskablar för likström. För att nå en transmissionsspänning på 1 MV behövs isolationsmaterial som i jämförelse med dagens polyeten har lägre elektrisk ledningsförmåga, högre styrka mot elektriskt genomslag och som kan kontrollera ansamling av rymdladdningar. De senaste årens forskning har visat att kompositer av polyeten med nanopartiklar av metalloxider har potential att nå dessa egenskaper. I det här arbetet har kompositer av polyeten och nanopartiklar av MgO för elektrisk isolation producerats och karaktäriserats. Nanopartiklar av MgO har framställts från en vattenbaserad utfällning med efterföljande calcinering, vilket resulterade i polykristallina partiklar med en mycket stor specifik ytarea (167m2 g-1). MgO-nanopartiklarna ytmodifierades i n-heptan genom att kovalent binda oktyl(trietoxi)silan och oktadekyl(trimetoxi)silan till partiklarna för att skapa en hydrofob och skyddande yta. Extrudering av de ytmodifierade MgO nanopartiklarna tillsammans med polyeten resulterade i en utmärkt dispergering med jämnt fördelad partiklar i hela kompositen, vilket ska jämföras med de omodifierade partiklarna som till stor utsträckning bildade agglomerat i polymeren. Alla kompositer med låg fyllnadsgrad (1–3 vikt% MgO) visade upp till 100 gånger lägre elektrisk konduktivitet jämfört med värdet för ofylld polyeten. Vid högre koncentrationer av omodifierade MgO förbättrades inte de isolerande egenskaperna på grund av för stor andel agglomerat, medan kompositerna med de ytmodifierade fyllmedlen som var väl dispergerade behöll en kraftig reducerad elektrisk konduktivitet upp till 9 vikt% fyllnadshalt. Den minsta interaktionsradien för MgO-nanopartiklarna för att minska den elektriska konduktiviten i kompositerna fastställdes med bildanalys och simuleringar till ca 800 nm. Den teoretiskt beräknade interaktionsradien kompletterades med observation av en experimentell interaktionsradie genom att mäta laddningsfördelningen över en Al2O3-nanopartikle i en polyetenfilm med intermodulation (frekvens-mixning) elektrostatisk kraftmikroskop (ImEFM), vilket är en ny AFM-metod för att mäta ytpotentialer. Genom att lägga på en spänning på AFM-kantilevern kunde det visualiseras hur laddningar, både injicerades och extraherades, från nanopartiklarna men inte från polyeten. Det tolkades som att extra energinivåer skapades på och runt nanopartiklarna som fungerar för att fånga in laddningar, ekvivalent med den gängse tolkningen att nanopartiklar introducera extra elektronfällor i den polymera matrisen i nanokompositer. Nanotomografi användes för att avbilda elektriska träd i tre dimensioner. Avbildningen av det elektriska trädet visade att tillväxten av trädet hade skett genom bildning av håligheter framför den framväxande trädstrukturen. Håligheterna leder till försvagning av materialet framför det propagerande trädet och förenklar på det sättet fortsatt tillväxt. Bildningen av håligheter framför trädstrukturen uppvisar en analogi till propagering av sprickor vid mekanisk belastning, i enlighet med Griffiths koncept.

QC 20161006

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Глєбов, Олег Юрійович. "Вдосконалення заземлювальних пристроїв електричних підстанцій для забезпечення безаварійної роботи вторинних кіл." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/40844.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.14.02 – електричні станції, мережі та системи. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2019 р. Дисертацію присвячено вдосконаленню заземлювальних пристроїв підстанцій напругою 330(220)/150(110) кВ за критерієм запобігання пошкодження ізоляції кабелів струмових захистів при ударі блискавки та при короткому замиканні на шинах розподільного пристрою вказаних класів напруги. На підставі аналізу експериментальних даних, отриманих на 80 діючих підстанціях України, визначено незалежні фактори, а також незначимі із ряду незалежних. На підставі проведення чьотирьох- та п'ятифакторних експериментів отримано модель для визначення опору заземлювального пристрою. Проведено порівняльний аналіз отриманої моделі з відомими розрахунковими методиками. Значення опору, визначене за формулою нормативного документу, для більшості підстанцій менше, ніж визначене за отриманою моделлю, тому є оцінкою знизу. На підставі проведення шестифакторного експерименту отримано модель для визначення напруги на ізоляції кабелю вторинних кіл трансформатору струму, який є найвіддаленішим від зали релейних панелей, при короткому замиканні на шинах розподільного пристрою. У роботі сформульовано процедуру експериментального визначення напруги на ізоляції кабелю при імітації короткого замикання. У роботі розроблено методику та наведено приклади визначення конструктивних параметрів та матеріальних витрат на виконання заземлювальних пристроїв з використанням отриманих в роботі математичних моделей за критерієм запобігання пошкодження ізоляції кабелів вторинних кіл при короткому замиканні, а також за критерієм запобігання хибного спрацювання струмових захистів у випадку пошкодження ізоляції кабелю.
Thesis for granting the Degree of Candidate of Technical sciences in speciality 05.14.02 – electric stations, networks and systems. – National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2019. The dissertation is devoted to the improvement of grounding systems of substations with voltage 330 (220) / 150 (110) kV on the criterion of prevention of damage to the insulation of current protection cables with a lightning strike and with short-circuit on the bus of the switchgear of the specified voltage classes. On the basis of the analysis of experimental data obtained at 80 operating substations of Ukraine, independent factors are determined, as well as insignificant from a number of independent ones. On the basis of four- and five-factor experiments, a model was developed to determine the grounding systems resistance. A comparative analysis of the obtained model with known computational methods was carried out. The value of the resistance, determined by the formula of the normative document, for most substations is less than determined by the received model, therefore, is an estimate from below. On the basis of a sixfactor experiment, a model for determining the voltage on the cable insulation of the secondary circuits of the current transformer is obtained, which is the most distant from the relay panels hall, with a short circuit on the bus of the switchgear. In the paper, the procedure for the experimental determination of voltage on cable isolation during simulation of short circuit was developed. In this work a method is developed and examples are given for determination of constructive parameters and material costs of grounding systems with the use of the mathematical models obtained in the work on the criterion of prevention of damage to insulation of secondary circuits with short circuit, and according to the of prevention the false triggering of current protection in the event of damage to the cable insulation.
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Глєбов, Олег Юрійович. "Вдосконалення заземлювальних пристроїв електричних підстанцій для забезпечення безаварійної роботи вторинних кіл." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/40840.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.14.02 – електричні станції, мережі та системи. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2019 р. Дисертацію присвячено вдосконаленню заземлювальних пристроїв підстанцій напругою 330(220)/150(110) кВ за критерієм запобігання пошкодження ізоляції кабелів струмових захистів при ударі блискавки та при короткому замиканні на шинах розподільного пристрою вказаних класів напруги. На підставі аналізу експериментальних даних, отриманих на 80 діючих підстанціях України, визначено незалежні фактори, а також незначимі із ряду незалежних. На підставі проведення чьотирьох- та п'ятифакторних експериментів отримано модель для визначення опору заземлювального пристрою. Проведено порівняльний аналіз отриманої моделі з відомими розрахунковими методиками. Значення опору, визначене за формулою нормативного документу, для більшості підстанцій менше, ніж визначене за отриманою моделлю, тому є оцінкою знизу. На підставі проведення шестифакторного експерименту отримано модель для визначення напруги на ізоляції кабелю вторинних кіл трансформатору струму, який є найвіддаленішим від зали релейних панелей, при короткому замиканні на шинах розподільного пристрою. У роботі сформульовано процедуру експериментального визначення напруги на ізоляції кабелю при імітації короткого замикання. У роботі розроблено методику та наведено приклади визначення конструктивних параметрів та матеріальних витрат на виконання заземлювальних пристроїв з використанням отриманих в роботі математичних моделей за критерієм запобігання пошкодження ізоляції кабелів вторинних кіл при короткому замиканні, а також за критерієм запобігання хибного спрацювання струмових захистів у випадку пошкодження ізоляції кабелю.
Thesis for granting the Degree of Candidate of Technical sciences in speciality 05.14.02 – electric stations, networks and systems. – National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2019. The dissertation is devoted to the improvement of grounding systems of substations with voltage 330 (220) / 150 (110) kV on the criterion of prevention of damage to the insulation of current protection cables with a lightning strike and with short-circuit on the bus of the switchgear of the specified voltage classes. On the basis of the analysis of experimental data obtained at 80 operating substations of Ukraine, independent factors are determined, as well as insignificant from a number of independent ones. On the basis of four- and five-factor experiments, a model was developed to determine the grounding systems resistance. A comparative analysis of the obtained model with known computational methods was carried out. The value of the resistance, determined by the formula of the normative document, for most substations is less than determined by the received model, therefore, is an estimate from below. On the basis of a sixfactor experiment, a model for determining the voltage on the cable insulation of the secondary circuits of the current transformer is obtained, which is the most distant from the relay panels hall, with a short circuit on the bus of the switchgear. In the paper, the procedure for the experimental determination of voltage on cable isolation during simulation of short circuit was developed. In this work a method is developed and examples are given for determination of constructive parameters and material costs of grounding systems with the use of the mathematical models obtained in the work on the criterion of prevention of damage to insulation of secondary circuits with short circuit, and according to the of prevention the false triggering of current protection in the event of damage to the cable insulation.
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Mugala, Gavita. "Influence of the semi-conducting screens on the wave propagation characteristics of medium voltage extruded cables." Licentiate thesis, KTH, Electrical Systems, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1537.

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Luo, Jing. "Novel insulation techniques for high voltage pulse transformers." Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/13327.

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This thesis describes a research investigation into novel designs of high voltage pulse transformers using magnetic insulation, which is the only practicable form of insulation for much of the equipment presently used in ultrahigh voltage pulsed-power work, including transmission lines and plasma opening switches. Although its use in transformers would bring important advantages in both size and weight reductions, a number of seemingly insurmountable problems have however so far prevented this. Two novel arrangements are presented in this thesis: one of these is a 500 kV transformer with self-magnetic insulation, and the other one is a 1 MV 'Tesla' transformer with external magnetic insulation. It is shown that both of these overcome the problems inherent in earlier designs and also offer considerable scope for further development in a number of important areas. It is believed that they represent the first working examples of magnetically-insulated transformers anywhere in the world. Modelling considerations of the transformers developed include both theoretical models and predicted characteristics. The filamentary technique used to describe mathematically the arrangements being investigated involves decomposition of the main conducting components into filamentary elements. The resulting equivalent electrical network includes all the mutual interactions that exist between the different filamentary elements, takes magnetic diffusion fully into account and enables the resistances and self and mutual inductances that are effective under fast transient conditions to be calculated. Theoretical results provided by the resulting mathematical models have been successfully validated by comparison with reliable experimental data. Much of the work detailed in the thesis has already been presented in high quality academic journals and at prestigious international conferences, and a solid theoretical and experimental basis has been laid down for future development and new progress into pulsed power system research.
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Wallström, Stina. "Biofilms on silicone rubber for outdoor high voltage insulation." Doctoral thesis, KTH, Fiber- och polymerteknik, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171.

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Silicone rubber high voltage insulators are sometimes colonised by microorganisms which form a biofilm on the surface of the infected unit. In this work insulators exposed to the outdoor environment in Sweden, Sri Lanka and Tanzania respectively have been studied. The biofilms colonising the insulators were shown to be of roughly the same composition regardless of their origin. Algae in association with bacteria dominated the biofilms and provided nutrition to mold growth. The isolated microorganisms were further used to study the effect of a biofilm on different silicone rubber materials. New tools for diagnosing biological growth on polymeric materials were developed and used to analyse the silicone rubber samples. No evidence of biodegradation of the polydimethylsiloxane (PDMS) molecule has been found in this work. However, this does not mean that PDMS rubbers used in high voltage insulators can be called bioresistant. Silicone insulating materials always contain additives and these may promote or hinder growth. For this reason, an extensive test program was developed, in order to evaluate the effect of different additives on the degree of biological growth. The program spanned from fast and easy methods, useful for screening large amount of samples, to the construction of specially designed microenvironment chambers in which mixed biofilms, similar to those formed on the surface of silicone rubber insulators in the field, were successfully grown. The test program showed that the flame retardant zinc borate protected the materials, whereas alumina trihydrate (ATH) did not hinder biological growth. On the contrary, environmental scanning microscopy (ESEM) in combination with X-ray energy dispersive spectroscopy (EDS) showed that the surface roughening caused by the addition of ATH to the silicone rubber matrix made the materials more difficult to clean. Furthermore when the hydrophobic surface of a silicone rubber insulator is covered by a hydrophilic biofilm this leads to a reduction of the surface hydrophobicity of the material. This may alter the electrical properties of the insulator. It is therefore important to develop methods to identify biofouled units. In this work, laser-induced fluorescence (LIF) spectroscopy was explored as a tool for the detection of biofilms on silicone rubbers. The experiments revealed that weak traces of algae or fungal growth, even those not visible to the naked eye, could be detected by this technique. In addition, it was shown that photography and subsequent digital image analysis could be utilised to estimate the area covered by biofilm growth. The results obtained indicate that LIF spectroscopy in combination with image analysis could be used for field diagnostics of biological growth on insulators in service.
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Books on the topic "High Voltage Cable Insulation"

1

Arora, Ravindra. High voltage and electrical insulation engineering. Piscataway, NJ: IEEE Press, 2011.

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Zhu, Daming. The detection of partial discharge in high voltage insulating materials, cable and cable terminations using acoustic emission techniques. Manchester: University of Manchester, 1996.

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Kind, Dieter, and Hermann Kärner. High-Voltage Insulation Technology. Wiesbaden: Vieweg+Teubner Verlag, 1985. http://dx.doi.org/10.1007/978-3-663-14090-0.

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Ushakov, Vasily Y. Insulation of High-Voltage Equipment. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-07918-8.

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Arora, Ravindra, and Wolfgang Mosch. High Voltage and Electrical Insulation Engineering. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9780470947906.

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Canadian Society of Civil Engineers., ed. High voltage insulator manufacture. [Montréal?: s.n., 1991.

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Abderrazzaq, Mohammad Hassan. High voltage composite insulation of water absorption. Manchester: University of Manchester, 1997.

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Kind, Dieter. High-voltage insulation technology: Textbook for electrical engineers. Braunschweig: Vieweg, 1985.

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S, Zaengl W., and Kuffel J, eds. High voltage engineering: Fundamentals. 2nd ed. Oxford: Butterworth-Heinemann, 2000.

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Kreuger, F. H. Partial discharge detection in high-voltage equipment. London: Butterworths, 1989.

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Book chapters on the topic "High Voltage Cable Insulation"

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Zhang, Wei, Xiao Tan, Man Ding, and Weifeng He. "Assessment for Aging State of High-Voltage Cable Insulation Based on Fuzzy Clustering Method." In The proceedings of the 10th Frontier Academic Forum of Electrical Engineering (FAFEE2022), 107–19. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3404-1_10.

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Abdelghani, Rouini, Kouzou Abdellah, and Larbi Messaouda. "Study of Electrical Field Distribution in the Insulation of High-Voltage Cables." In Lecture Notes in Electrical Engineering, 723–34. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6403-1_49.

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Wang, Jiahe, Man Ding, Weifeng He, and Zhenfei Chen. "The Space Charge Characteristic of Cross-Linking Polyethylene Insulation of High Voltage DC Cables on Different Voltage Levels Under Temperature Gradient." In Lecture Notes in Electrical Engineering, 1365–74. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-0451-8_138.

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Beik, Omid, and Ahmad S. Al-Adsani. "High Voltage Insulation Systems." In DC Wind Generation Systems, 155–76. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39346-5_6.

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Ushakov, Vasily Y. "Calculation of Insulation." In Insulation of High-Voltage Equipment, 351–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-07918-8_11.

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Kind, Dieter, and Hermann Kärner. "Electric Strength." In High-Voltage Insulation Technology, 1–61. Wiesbaden: Vieweg+Teubner Verlag, 1985. http://dx.doi.org/10.1007/978-3-663-14090-0_1.

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Kind, Dieter, and Hermann Kärner. "Insulating Materials in High-Voltage Technology." In High-Voltage Insulation Technology, 62–96. Wiesbaden: Vieweg+Teubner Verlag, 1985. http://dx.doi.org/10.1007/978-3-663-14090-0_2.

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Kind, Dieter, and Hermann Kärner. "Design and Manufacture of High-Voltage Equipment." In High-Voltage Insulation Technology, 97–158. Wiesbaden: Vieweg+Teubner Verlag, 1985. http://dx.doi.org/10.1007/978-3-663-14090-0_3.

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Minkner, Ruthard, and Joachim Schmid. "Insulation for High Voltage Equipment." In The Technology of Instrument Transformers, 1–41. Wiesbaden: Springer Fachmedien Wiesbaden, 2021. http://dx.doi.org/10.1007/978-3-658-34863-2_1.

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Ushakov, Vasily Y. "Insulation and Media Test Techniques." In Insulation of High-Voltage Equipment, 13–24. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-07918-8_2.

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Conference papers on the topic "High Voltage Cable Insulation"

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Mills, D. H., P. L. Lewin, and G. Chen. "Ageing of high voltage cable insulation." In 2011 Electrical Insulation Conference (EIC) (Formerly EIC/EME). IEEE, 2011. http://dx.doi.org/10.1109/eic.2011.5996194.

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Kohalmy, S. "Polyolefins as candidates for HVDC cable insulation materials." In 11th International Symposium on High-Voltage Engineering (ISH 99). IEE, 1999. http://dx.doi.org/10.1049/cp:19990832.

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Li, F., L. Zhong, J. Gao, R. Sui, W. Li, and H. Zhang. "The voltage endurance characteristics of HVDC cable insulation slices." In 22nd International Symposium on High Voltage Engineering (ISH 2021). Institution of Engineering and Technology, 2021. http://dx.doi.org/10.1049/icp.2022.0261.

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Wang, W., X. Yan, H. Wang, Y. Feng, and L. Zhang. "Cable deformation and electric field distortion of submarine cable insulation caused by anchoring impact." In 22nd International Symposium on High Voltage Engineering (ISH 2021). Institution of Engineering and Technology, 2021. http://dx.doi.org/10.1049/icp.2022.0053.

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Holto, Jorunn, and Erling Ildstad. "Electrical treeing in extruded polypropylene high voltage cable insulation." In 2010 International Conference on High Voltage Engineering and Application (ICHVE). IEEE, 2010. http://dx.doi.org/10.1109/ichve.2010.5640748.

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Zhang, L., L. Wang, Q. Lv, Z. Tian, S. Yang, X. Yue, and H. Li. "An integrated voltage generator for medium voltage power cable insulation diagnosis." In 22nd International Symposium on High Voltage Engineering (ISH 2021). Institution of Engineering and Technology, 2021. http://dx.doi.org/10.1049/icp.2022.0169.

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Wu, Ruay-Nan, and Chien-Kuo Chang. "Deterioration trend on electrical treeing of underground cable insulation." In 2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC). IEEE, 2012. http://dx.doi.org/10.1109/ipmhvc.2012.6518818.

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Duan, Jiazhen, Hongmao Huang, Ruxin Shi, Xiaoqiang Chen, Kun Xie, Chengyan Ren, and Tao Shao. "Plasma Repair of Insulation Crack Defects for Cable Accessories." In 2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE). IEEE, 2022. http://dx.doi.org/10.1109/ichve53725.2022.9961411.

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Minghui Bao, Shiying Tang, Junjia He, Xiaogen Yin, Qian Wang, Gaolin Wu, and Yan Yang. "The initiation phenomena of electrical treeing in XLPE cable insulation." In 2012 International Conference on High Voltage Engineering and Application (ICHVE). IEEE, 2012. http://dx.doi.org/10.1109/ichve.2012.6357142.

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He, Jinliang, and Yao Zhou. "Progress in eco-friendly high voltage cable insulation materials." In 2018 12th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2018. http://dx.doi.org/10.1109/icpadm.2018.8401276.

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Reports on the topic "High Voltage Cable Insulation"

1

Eager, G. S. Jr, G. W. Seman, and B. Fryszczyn. Determination of threshold and maximum operating electric stresses for selected high voltage insulations: Investigation of aged polymeric dielectric cable. Final report. Office of Scientific and Technical Information (OSTI), November 1995. http://dx.doi.org/10.2172/212744.

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Eamer, J. B. R., C. Greaves, and E. L. King. The science questions underpinning the potential for offshore wind turbines on Atlantic Canada's continental shelves. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331697.

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Offshore wind farms typically host tens to hundreds of turbines that are individually sited on foundations or anchored if floating. These are connected by inter-farm cables which feed into one or more marine-based substations, further feeding one or more shore-connected high-voltage cables - all infrastructure that requires knowledge of water depth, metocean conditions, and seabed/subsurface geology. With this industry set to establish itself on the continental shelf of Atlantic Canada, knowledge of the geological conditions from the seabed to tens of metres below will be essential for farm layout and foundation design. Thus, geoscience questions addressing regional geomorphology, Pleistocene glacial retreat and sea-level change, the characteristics of key individual stratigraphic layers, and the magnitude and patterns of sediment mobility are important. In Atlantic Canada, ongoing efforts to address these questions are using legacy data, but new data is required to further our understanding of the shallower portions of the shelf. Examples include: what is the distribution of buried tunnel valleys under offshore banks, and might their complex facies infill affect foundation conditions? How and where would the organic sediments, left by a coastal suite of landforms drowned during transgression, affect foundation or landfalling cable stability? How active is salt diapirism, and could it be considered a geohazard? Are demonstrated sediment mass failures also a risk? What is the current understanding of sediment mobility in shallow waters, and how does that affect infrastructure armouring/depth of burial? What is the variability of the geotechnical properties of our offshore sediments? What is the foundation suitability of offshore Tertiary semi-consolidated bedrock? To conclude, the initial scope of a developing regional foundation suitability model will be presented for the Eastern Scotian Shelf.
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