Relevant bibliographies by topics / Transient overvoltage

Academic literature on the topic 'Transient overvoltage'

Author: Grafiati
Published: 10 December 2022
Last updated: 19 February 2023

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Journal articles on the topic "Transient overvoltage"

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Keitoue, Samir, Ivan Murat, Božidar Filipović-Grčić, Alan Župan, Ivana Damjanović, and Ivica Pavić. "Lightning caused overvoltages on power transformers recorded by on-line transient overvoltage monitoring system." Journal of Energy - Energija 67, no. 2 (June 2, 2022): 44–53. http://dx.doi.org/10.37798/201867279.

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Transient overvoltages generated by lightning strikes or switching operations represent a significant risk to bushings and windings of power transformers. They cause stress on the insulation system and can, over time, cause dielectric failure and damage to power transformers. Many transformer failures are reported as dielectric failures and they are not necessarily linked to any particular event when they occur but may be the result of prior damage from transient overvoltage events. Lightning and switching overvoltage waveforms appearing at transformer terminals in real operating conditions may significantly differ from standard impulse voltage waveforms used during laboratory testing. The number and amplitudes of overvoltages which stress the insulation depend on various parameters such as the lightning strike density in the considered area, since it determines how often the transformer is stressed by lightning overvoltages. Since the overvoltage amplitudes at transformer terminals are usually unknown, an on-line overvoltage transient recorder can be used with the ability to sample, analyse and store transients in real-time. In this paper, an on-line transient overvoltage monitoring system (TOMS) for power transformers is presented that is capable to continuously record in real-time various kinds of transient overvoltages such as lightning or switching overvoltages. Special attention is paid to lightning caused transient overvoltages recorded at the terminals of 150 MVA power transformer. Recorded waveforms originating from lightning strikes to overhead lines are correlated with data from the lightning location system (LLS) and supervisory control and data acquisition (SCADA) system. Collected data about overvoltage stresses can be used as the basis for the assessment of the transformer insulation condition, estimation of health index and for analysis of various kinds of events such as faults or equipment failures.
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Furgał, Jakub, Maciej Kuniewski, and Piotr Pająk. "Analysis of Internal Overvoltages in Transformer Windings during Transients in Electrical Networks." Energies 13, no. 10 (May 22, 2020): 2644. http://dx.doi.org/10.3390/en13102644.

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Due to the increasing requirements for the reliability of electrical power supply and associated apparatus, it is necessary to provide a detailed analysis of the overvoltage risk of power transformer insulation systems and equipment connected to their terminals. Exposure of transformer windings to overvoltages is the result of the propagation condition of electromagnetic waves in electrical networks and transformer windings. An analysis of transformer winding responses to transients in power systems is of particular importance, especially when protection against surges by typical overvoltage protection systems is applied. The analysis of internal overvoltages in transformers during a typical transient related to switching operations and selected failures is of great importance, particularly to assess the overvoltage exposure of insulation systems in operating conditions. The random nature of overvoltage phenomena in electrical networks implies the usage of computer simulations for the analysis of overvoltage exposures of electrical devices in operation. This article presents the analysis of the impact of transient phenomena in a model of a medium-voltage electrical network during switching operations and ground faults on overvoltages in the internal insulation systems of transformer windings. The basis of the analysis is simulations of overvoltages in the windings, made in the Electromagnetic Transients Program/Alternative Transients Program (EMTP/ATP) using a model with lumped parameters of transformer windings. The analysis covers the impact of the cable line length and the ground fault resistance value on internal overvoltage distributions.
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Furgał, Jakub. "Influence of Lightning Current Model on Simulations of Overvoltages in High Voltage Overhead Transmission Systems." Energies 13, no. 2 (January 7, 2020): 296. http://dx.doi.org/10.3390/en13020296.

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The analysis of lightning overvoltages generated in electrical power systems has a great meaning for the designers and exploitation engineers because it creates bases for the optimization of construction overhead transmission lines and high voltage substations, reducing costs and increasing reliability of the transmission and distribution of electrical energy. Lightning overvoltages generated in electrical power systems with overhead transmission lines are a result of complex, nonlinear, and surge phenomena occurring in the structure of line towers and electrical substation when the lightning current is flowing through them. Methods of overvoltage stress analysis are intensely developed, and one of the directions is working out models of high voltage electrical devices and phenomena in electrical networks, which influence the shape and values of overvoltage risks. The model of lightning current has a significant influence on the courses of overvoltages in high voltage transmission systems. The paper is focused on the analysis of the influence of the model of lightning current making use of simulations of the shape, and maximal values of overvoltages generated in high voltage transmission systems during a direct lightning strike to the overhead lines. Two models of lightning current used in simulations with the Electromagnetic Transients Program/Alternative Transient Program (EMTP/ATP) were analyzed, i.e., the Heidler model and CIGRE (Conseil International des Grands Réseaux Électriques) model. The EMTP/ATP computer program is very often used in simulations of overvoltages in electrical networks. Unfortunately, the users get no information on the criterion to be used when selecting the model of lightning current used in the simulations. The analysis presented in the paper gives practical knowledge about the effect of the use of a particular kind of lightning current model on the results of simulations of lightning overvoltage propagation in electrical networks, overvoltage protection, as well as on theoretical and practical aspects of the insulation coordination in high voltage transmission systems.
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Leman, Jon T., and Robert G. Olsen. "Bulk FDTD Simulation of Distributed Corona Effects and Overvoltage Profiles for HSIL Transmission Line Design." Energies 13, no. 10 (May 14, 2020): 2474. http://dx.doi.org/10.3390/en13102474.

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Power system load growth and transmission corridor constraints are driving industry activity in the area of high surge impedance loading (HSIL). Examples include compact structure design and uprating existing transmission lines. Recent research relating electric field uniformity to transmission line capacity and critical flashover voltage underscored the need for better overvoltage data to quantify insulation margins for HSIL design. To that end, this work extends the finite difference time domain (FDTD) method with distributed corona losses to transmission lines with bundled conductors. The model was adapted for practical use in high-volume statistical transient simulation and applied to an example 500 kV line. Transients included line energization and trapped charge reclosing. Overvoltage profiles and statistical distributions were generated from 9500 simulations obtained by random breaker close timing and variation in line length and altitude. Distributed corona losses reduced 98th percentile line-to-ground switching overvoltages by 4%–14% of nominal. The estimated line-to-ground switching surge flashover probability was 54%–80% lower with corona loss. Corona had less impact on line-to-line overvoltages, but the effects were still notable. Results highlight the importance of considering detailed overvoltage profiles and accounting for corona loss attenuation when seeking to carefully quantify insulation design margins.
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Han, Yanzan, and Jimeng Zhang. "Recognition Algorithm of Transient Overvoltage Characteristic Based on Symmetrical Components Estimation." Symmetry 12, no. 1 (January 7, 2020): 114. http://dx.doi.org/10.3390/sym12010114.

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The recognition of transient overvoltage characteristics is the premise of disturbance compensation of the transient overvoltage. Based on that, the recognition algorithm of transient overvoltage characteristics based on symmetrical components estimation was proposed. The generation mechanism of the transient overvoltage in gas insulated switchgear (GIS) was analyzed. Then, the transient overvoltage was measured via the capacitive sensor method. The three-phase voltage of ultra-high voltage grid was asymmetrical when the transient overvoltage appeared. At present, the asymmetrical three-phase voltage was decomposed into the superposition of a symmetrical positive-sequence component, a negative-sequence component, and a zero-sequence component via the symmetrical components estimation to build the superposition model. The model was decomposed via the trigonometric identity and the modified neural network of the least mean square learning rule was used to estimate the parameter vector of the characteristic quantity of the transient overvoltage in real time. The feasibility of the proposed algorithm was verified via comparing the simulation of the proposed algorithm and the algorithm based on dp transformation. The experimental results show that the proposed algorithm has the advantages of a small operand, high detection precision, and fast action.
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Hanus, Oleksii, and Kostiantyn Starkov. "STUDY OF THE NATURE OF OVERVOLTAGES IN THE ELECTRICAL NETWORK ARISING FROM VOLTAGE TRANSFORMERS." Bulletin of the National Technical University "KhPI". Series: Energy: Reliability and Energy Efficiency, no. 1 (2) (July 2, 2021): 28–36. http://dx.doi.org/10.20998/2224-0349.2021.01.05.

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A non-linear dynamic mathematical model of voltage transformer has been considered and overvoltages arising on the elements of voltage transformer equivalent circuit during transient processes have been investigated. The influence of voltage transformer secondary circuit capacitance on overvoltage multiplicity in the primary circuits and the duration of transients has been determined. The advantages of approximation of nonlinearity of voltage transformers by hyperbolic sine are used. Mathematical expressions determining the nature of changes in the forced and free components of the transient process in an electrical network with a voltage transformer have been obtained. It is shown that with the increase of the electric network capacitance the duration of the transition process damping increases and the frequency of the forced oscillations and the level of overvoltage decrease. It is proved that even small, in comparison with the primary nominal sinusoidal voltage, aperiodic components of the voltage transient process can lead to significant overvoltages during voltage transformer outages. It has been substantiated that both the secondary resistance and the switching torque influence the overvoltage multiplicity arising in the primary winding of voltage transformers. It is shown that the closed secondary winding worsens the disconnection process of non-linear inductance of voltage transformers. The values to which overvoltages increase in this case are determined. According to the results of calculations it is determined that with open secondary winding of voltage transformers the duration of transient process significantly increases. It has been found that the decrease of frequency of forced oscillations, which occurs in this case, is accompanied by an increase of currents in the primary winding of the voltage transformer, which is dangerous in terms of thermal stability of the winding insulation. It is shown, that closing the secondary winding of voltage transformers leads to significant reduction of transient damping time. It is suggested that this algorithm can be used to provide a rapid breakdown (suppression) of ferroresonant processes. The effectiveness of such a measure of stopping of ferroresonance processes as short-term shunting of secondary winding of voltage transformers has been investigated. The correlation of parameters of electric networks (capacity of busbar sections, nonlinearity of characteristics of voltage transformers, disconnection torque, etc.) at which ferroresonance process may occur and consideration of which may allow, in terms of prevention of ferroresonance processes, to identify substations (electric networks) that require more detailed research has been determined. The results of analytical studies were tested in the electric networks of JSC "Kharkivoblenergo" and used in the electricity distribution system for the selection of specific voltage transformers for certain configurations of electrical networks.
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R. S. Gates, L. W. Turner, and D. G. Overhults. "Transient Overvoltage Testing of Environmental Controllers." Transactions of the ASAE 35, no. 2 (1992): 727–33. http://dx.doi.org/10.13031/2013.28655.

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Feng, Man, Tao Li, and Jinjuan Liu. "Transient overvoltage characteristics in submarine cables of multi-terminal flexible HVDC transmission system." Journal of Physics: Conference Series 2108, no. 1 (November 1, 2021): 012046. http://dx.doi.org/10.1088/1742-6596/2108/1/012046.

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Abstract The overvoltage transient characteristics of submarine cables are one of the key technologies for submarine power transmission. This article takes the submarine cable of Zhoushan Multi-terminal Flexible HVDC Transmission Project as the research object. The MMC-HVDC simulation models at both ends of converter stations are built in PSCAD. The parameters and equivalent models of the flexible HVDC cables are determined, and the submarine DC cable operating overvoltage is calculated by using statistical methods. The simulation results show that the maximum overvoltage of the submarine cable, that is, the maximum overvoltage of the conductor to sheath, the sheath to the armour, and the armour to the ground are 400 kV, 7.27 kV and 0.45kV respectively. The maximum overvoltage when it occurs faults on grid-side or valve-side appears in the middle of the submarine cable. Maximum overvoltage of HVDC single pole grounding fault appears at the connection point of land cable and submarine cable. The simulation results and the discovery of features in this article provide reference in the design, selection, and testing of submarine power transmission equipment.
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Pannila, Earl A. R. L., and Mahesh Edirisinghe. "Signatures of Transient Overvoltages in Low Voltage Power Systems in Tea Factories and Their Implications on Insulation Deterioration and Allied Power Quality Issues." Journal of Electrical and Computer Engineering 2021 (November 19, 2021): 1–12. http://dx.doi.org/10.1155/2021/2623965.

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Electrical equipment and supply cables demand a better quality of supply, with the recent advancements in integrated sensitive solid-state controls. Divergently, proliferated heavy inductive motors and some performance additions based on power electronics have introduced power quality issues to the network. Thus, this study mainly investigates the impact of switching transients generated by electromechanical machines in industrial power systems on insulation deterioration while taking transient overvoltages due to capacitor bank switching also to support. Transients with a high rate of rise are likely to catalyze the degradation of the insulation quality and break down the insulating material through ionization. These steeply passing overvoltage stresses let partial discharges ensue, which can attack the insulation over long service. To unveil this danger, 314 common-mode transient waveforms were measured in the electrical machines of five tea factories in Sri Lanka, in a 50 ms measurement window, taken in 55 measuring attempts. Most of the transients observed are in the form of a damped oscillatory waveform tailed by fast exponential collapse. That correlates to insulation degradation having a very steep rise as 30.04 V/ns, the highest at the withering section. When machines are heavily loaded, situations tend to generate transients with high amplitudes. There were transient bursts that spread as 426.3 ms, while 14 ns fast rise times were recorded from withering motors. Unlike electrical resonance and power-frequency overvoltages, electromagnetic switching transients last even less than 100 ms. To underline this, an analysis of the frequency domain of transients was also presented, which proves high density of high-frequency components reaching 107 kHz range. Accepting the fact that frequency and amplitude are always under the influences of innumerable dynamics, the observational evidence of the study endorses that electrical stress built by the transient nature of the factories reduces the life expectancy of electrical insulation.
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Kaczmarek, Michał, and Dariusz Brodecki. "Transformation of Transient Overvoltages by Inductive Voltage Transformers." Sensors 21, no. 12 (June 17, 2021): 4167. http://dx.doi.org/10.3390/s21124167.

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Overvoltage transients occur after any type of switching activity in a power network, such as breaker operation, fault occurrence/clearance and rapid load change. This distortion of voltage is transformed to the secondary circuit of a voltage transformer. The maximum values of such impulses may many times exceed the rated value of its secondary voltage. This can lead to malfunction of measuring or protection devices connected to the secondary circuit of a voltage transformer and even their damage. The paper presents the application of determined values of ratio error at harmonics of the inductive voltage of the transformer to predict the value of transformed slow-front transient overvoltage to their secondary circuits. This will help to prevent malfunction of measuring or protection devices connected to the secondary side of the voltage transformer and increase their safety of operation. The inductive voltage transformer equivalent circuit for transformation of higher frequency components of distorted voltage must be extended with internal capacitances of windings. This is caused by the fact that the resonance phenomenon of the slow-front transient overvoltage results from leakage inductance and capacitance of primary winding, not from the magnetic core. Therefore, this behaviour is independent from the value of the applied voltage.
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Dissertations / Theses on the topic "Transient overvoltage"

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Laznevoy, A., Ірина Анатоліївна Башлак, Ирина Анатольевна Башлак, and Iryna Anatoliivna Bashlak. "Transient overvoltage and its effect on a substation." Thesis, Sumy State University, 2019. https://essuir.sumdu.edu.ua/handle/123456789/77004.

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We seem to have problems with power industry nowadays. It often faces unforeseen overvoltages in the system. But what does overvoltage mean? Overvoltage is associated with the electric field strength, namely with its increase. Overvoltage happens when the electric field strength reaches a value that is dangerous for the insulation state. What consequences might overvoltage cause? Factories are losing tens of millions per year due to power interruptions. Moreover, the cost of replacing equipments damaged because of voltage spikes is very high. Power industry experiences huge losses of production. The effect of transient overvoltage on substation equipment and the conforming protection against it are likely to be the most important elements of this problem.
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Galliano, Francois. "Propagation and mitigation of Very Fast Transient Overvoltage in Gas Insulated Substation." Thesis, KTH, Elektroteknisk teori och konstruktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-160516.

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Very Fast Transients are surge overvoltages created for example when opening or closing a disconnector switch (DS). Because of the very high frequency stress they exert on the equipment and their magnitude (up to 3 pu), they constitute an important issue in the design of ultra-high voltage Gas Insulated Substations. This thesis offers a general understanding of Very Fast Transient Overvoltages (VFTO or VFT) and explores different mitigation techniques, mainly based on dissipation of the energy associated with it. Two solutions are mainly discussed for attenuating the VFTO: applying a semi resistive and magnetic coating or using magnetic rings. Both rely on the non-linearity of skin effect and magnetic losses and are treated in similar manners. An electromagnetic model of both systems is proposed as well as a way to model the influence of the device on the transient behaviour of the system. The performances of both systems still have to be determined by experimentation but they both should significantly reduce the impact of the VFTO.
Mycket snabba transienter (eng. Very Fast Transients) är överspänningar som skapas till exempel när en frånskiljare öppnas eller stängs (DS). På grund av de mycket högfrekventa påkänningar som de utövar på utrustningen och deras storlek (upp till 3 pu), utgör de en viktig fråga i utformningen av ultrahögspännings gasisolerade ställverk. Denna avhandling ger en allmän förståelse för mycket snabba transienta överspänningar (VFTO eller VFT) och undersöker olika metoder för dämpning, främst baserade på förlust av energi. . Främst diskuteras två lösningar för dämpning av VFTO: applicering av en semi resistiv och magnetisk beläggning kring ledaren eller använda magnetiska ringar. Båda är beroende av icke-linjäritet av strömförträngningseffekt och magnetiska förluster, båda metodernabehandlas på liknande sätt. En elektromagnetisk modell av båda systemen föreslås liksom ett sätt att modellera inverkan av anordningen på transienta systemets beteende. Utförandet av båda systemen måste verifieras genom experiment, men de båda bör avsevärt minska effekterna av VFTO.
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Khan, Md Nazmus Shakib. "Transient Voltage Distribution in Bushing." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-292753.

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An electrical bushing is one of the most important elements in a power transformer. Steep front surges such as transient impulse voltage from lightning strikes is an inevitable electromagnetic transient mostly happening in power transmission and distribution system. The bushing might lead to be degraded due to such kind of surge. This project deals with overvoltage stress distribution on the transformer bushing under the effect of electromagnetic transient response such as lightning impulse.  To understand the behavior of transient response on the bushing, a proper model of power transformer bushing is built-in Comsol multiphysics to authenticate the stress distribution. The electromagnetic wave of impulse propagates onto the overhead line that connects with the transformer. Some understanding of the transient behavior of a conductor bushing has been achieved through studying the influence of inductance property and the skin effect characteristics of a multi-layer coaxial cable on the wave propagation, which has been structured in this project to simplify the model. On the other hand, the skin effect analysis on the conductor of the bushing has been taken also into account in this project using real conductor simulation in the Comsol model. Thus, it will be interesting to compare the real conductor model with the perfect conductor of the bushing through analyzing the current density effect on it.  In this project, multi-layer of coaxial cable and transformer bushing are simulated. The simulation is carried out for time domain and frequency domain in Comsol based on the model characteristics.
En elektrisk genomföring är ett av de viktigaste elementen i en transformator. Spänningsvågor med branta fronter som impulsspänningar från blixtnedslag är ett oundvikligt elektromagnetiskt övergående fenomen som oftast sker i kraftöverförings- och distributionssystem. Genomföringen kan leda till att degraderas på grund av en sådan våg. Detta projekt handlar om fördelning av överspännings på transformatorgenomföringen under påverkan av elektromagnetisk transient respons, såsom blixtimpuls.  För att förstå beteendet hos övergående respons på genomföringen är en korrekt modell av transformatorgenomföring inbyggd Comsol-flerfysik för att autentisera spänningsfördelningen. Den elektromagnetiska impulsvågen fortplantas från luftledningen som ansluter till transformatorn. Viss förståelse för det övergående beteendet hos en ledargenomföring har uppnåtts genom att studera påverkan av induktansegenskaper och hudeffektegenskaperna hos en flerskikts koaxialkabel på vågutbredningen, vilket har strukturerats i detta projekt för att förenkla modellen. Å andra sidan har hudeffektanalysen på genomföringens ledare beaktats i detta projekt med användning av verklig ledarsimulering i Comsol-modellen. Således blir det intressant att jämföra den riktiga ledarmodellen med den perfekta ledaren för genomföringen genom att analysera strömtäthetseffekten på den.  I detta projekt simuleras flerskikt av koaxialkabel och transformatorgenomföring. Simuleringen utförs för tidsdomän och frekvensdomän i Comsol baserat på modellegenskaperna.
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Bátora, Branislav. "Analýza ferorezonančního přepětí v elektrických sítích." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-233633.

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This thesis deals with the ferroresonance phenomenon and ferroresonance overvoltage in electric networks. That’s why the introduction part explains the theoretical basis of ferroresonance and its consequences in the power system. The work then focuses on the power system as a non-linear dynamic system and describes various analytical methods for solving these systems. These methods are further applied to diagnose specific systems. There are a number of various power system configurations susceptible to ferroresonance. The most frequent one is theoretically analyzed in this thesis and a number of recommendations are offered for reducing the ferroresonance phenomenon. The thesis further deals with the selection of suitable software for this computationally chal-lenging task. A number of different tools are considered and efficiently reduced to Matlab Sim-ulink and PSCAD software. Matlab Simulink and its SimPowerSystem Toolbox are used to ana-lyze the effect of hysteresis of the magnetic core of the transformer on the emergence and course of the ferroresonance phenomenon. Using PSCAD, various configurations of the power systems are compared in terms of possible emergence and course of ferroresonance and also to find the limiting conditions that increase the probability of this phenomenon. The possibility of using arti-ficial neural networks for ferroresonance diagnosis is also mentioned in this thesis. The final part provides a number of recommendations for design and operation of both new and existing power systems.
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Ezzeddine, Kassem, and Robert Oskarsson. "Analys av kondensatorbatteriers tillkopplingsfenomen : Undersökning av de kopplingsfenomen som uppstår vid tillkoppling av kondensatorbatterier och deras påverkan på närliggande komponenter." Thesis, KTH, Data- och elektroteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-208948.

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Många elektriska apparater är i behov av reaktiv effekt för att kunna fungera. Transport av reaktiv effekt tar onödig plats av den tillgängliga kapaciteten i elnätet, därför används kondensatorbatterier nära slutanvändaren för att generera reaktiv effekt. Därmed genereras och förbrukas den reaktiva effekten i en avskild del av nätet. Tillkoppling av kondensatorbatterier ger upphov till transienter som kan skada andra närliggande komponenter. Utifrån det verkliga ställverket Stallbacka i Trollhättan har denna rapport analyserat de transienter som uppstår efter tillkoppling av ett kondensatorbatteri inom mellanspänningsområdet. Analysen har innefattat hur stora transienterna blir efter olika förutsättningar och scenarier. Resultatet visade att transienterna i detta fall aldrig nådde upp till några allvarliga nivåer, och därmed klarade komponenterna sig med god marginal. Huruvida transienterna påverkar elkvaliteten är oklart, då det inte finns några definierade krav. Slutligen skulle ett beräkningsverktyg för förutspådda transienter tas fram. Beräkningsverktyget blev aldrig fullständigt på grund av den ohanterliga lösningen som erhölls.
Many electrical devices need reactive power to operate. Transmission of reactive power occupies a proportion of the available capacity in the power system and therefore capacitor banks are used near to the end user to generate reactive power. Thus, the reactive effect is generated and consumed in a separate part of the power system. Capacitor banks switching causes transients which may damage the surrounding components. Based on the real substation Stallbacka in Trollhättan, this study has analysed capacitor banks switching transients within the medium voltage level. The analysis has covered the size of these transients according to different conditions and scenarios. The result showed that the transients in this case never reached serious levels, thus there was no impact on the components. It is not clear whether the transients affect the power quality because there are no defined limits.  A calculation tool to the predicted transients was supposed to be created in the process. This calculation tool was never completed due to the unmanageable solution that was obtained.
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Haddad, Abderrahmane. "Attenuation and limitation of transient overvoltages on transmission systems." Thesis, Cardiff University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427994.

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Qureshi, Suhail Aftab. "Calculation of fast transients in gas insulated substations." Thesis, University of Manchester, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363514.

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Gregory, Raquel Cristina Filiagi. "Análise computacional do desempenho de estratégia para o religamento controlado de linhas de transmissão." Universidade Federal de Uberlândia, 2016. https://repositorio.ufu.br/handle/123456789/17617.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico
A busca por soluções mitigatórias, no que tange aos efeitos das sobretensões transitórias atreladas às manobras de energizações e religamentos das linhas de transmissão, contemplam um tema desafiador e com fortes impactos sobre a coordenação de isolamento dos sistemas elétricos. Muito embora o reconhecimento de propostas clássicas e comerciais para a atenuação destes fenômenos, outras possibilidades, certamente, ainda são meritórias de destaque e investigações. Neste contexto, a presente dissertação encontra-se alicerçada na exposição dos fundamentos físicos e matemáticos de uma estratégia baseada em chaveamentos controlados, cujos instantes para o religamento da linha são pré-programados. A avaliação computacional da eficácia da metodologia é realizada utilizando o simulador ATP, no qual são efetuados estudos em um sistema elétrico típico submetido à curtos-circuitos sucedidos por desligamentos e subsequentes religamentos, sob a ação da tecnologia aqui focada e na ausência da mesma.
The search for mitigation solutions, with respect to the effects of overvoltages linked to the energization and reclosing maneuvers of transmission lines include a challenging subject with strong impact on the insulation coordination of electrical systems. Although the recognition of classical and commercial proposals to mitigate these phenomena, other possibilities are certainly still worthwhile highlighting and investigations. In this context, the present work is grounded in the exposure of the physical and mathematical foundations of a strategy based on controlled switchings, whose moments to the line reclosing are pre-programmed. The computational evaluation of the effectiveness of the methodology is made using the ATP simulator, which are studies in a typical electrical system subjected to the action of short-circuits fallowed by shutdowns and subsequent reclosing, under the action of technology here focused and lack thereof.
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Kunakorn, Anantawat. "A study of transient overvoltages from power electronic converters and their distribution in random-wound electrical machines." Thesis, Heriot-Watt University, 2000. http://hdl.handle.net/10399/565.

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Gercek, Cem Ozgur. "Optimizing Transient And Filtering Performance Of A C-type 2nd Harmonic Power Filter By The Use Of Solid-state Switches." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608836/index.pdf.

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In this research work, the performance of a C-type, 2nd harmonic power filter is optimized by the use of a thyristor switched damping resistor. In the design of conventional C-type, 2nd harmonic filters
the resistance of permanently connected damping resistor is to be optimized for minimization of voltage stresses on filter elements arising from switchings in transient state and for maximization of filtering effectiveness in the steady-state. Transformer inrush current during energization of power transformers and connection of filter bank to the supply are the major causes of voltage stresses arising on filter elements in transient state. These can be minimized by designing a highly damped C-type filter (low damping resistor) at the expense of inadequate filtering performance and high losses in the steady-state. On the other hand, higher damping resistance (high quality factor) is to be chosen in the design of C-type filter for satisfactory filtering of 2nd harmonic current component at the expense of higher voltage rating for capacitor bank and hence a more costly filter bank design. This drawback of conventional C-type 2nd harmonic filter circuit can be eliminated by subdividing damping resistor into two parallel parts
one is permanently connected while the other is connected to and disconnected from the circuit by back-to-back connected thyristor assemblies. The use of light triggered thyristors provides isolation between power stage and control circuit, and hence allows outdoor installation.
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Books on the topic "Transient overvoltage"

1

Standler, Ronald B. Protection of electronic circuits from overvoltages. New York: Wiley, 1989.

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Schwetz, S. Gefahren am Arbeitsplatz infolge transienter Überspannungen im elektrischen Versorgungsnetz. Dortmund: Bundesanstalt für Arbeitsschutz, 1993.

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Dian li xi tong guo dian ya ji dian qi jue yuan fang hu. Beijing: Mei tan gong ye chu ban she, 2012.

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High voltage protection for telecommunications. Hoboken, N.J: Wiley-IEEE Press, 2011.

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Standler, Ronald B. Protection of Electronic Circuits from Overvoltages. Dover Publications, 2002.

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Voldman, Steven H. Electrical Overstress: Devices, Circuits and Systems. Wiley & Sons, Incorporated, John, 2013.

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Voldman, Steven H. Electrical Overstress: Devices, Circuits and Systems. Wiley & Sons, Incorporated, John, 2013.

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Electrical Overstress: Devices, Circuits and Systems. Wiley, 2013.

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Voldman, Steven H. Electrical Overstress: Devices, Circuits and Systems. Wiley & Sons, Incorporated, John, 2013.

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Voldman, Steven H. Electrical Overstress: Devices, Circuits and Systems. Wiley & Sons, Limited, John, 2013.

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Book chapters on the topic "Transient overvoltage"

1

Li, Yang, Guoming Ma, and Hao Zhou. "Very Fast Transient Overvoltage of UHVAC System." In Advanced Topics in Science and Technology in China, 299–381. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54575-1_7.

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Filipovic-Grcic, Bozidar, Bruno Jurišić, Samir Keitoue, Ivan Murat, Dalibor Filipovic-Grcic, and Alan Zupan. "Analysis of Overvoltages on Power Transformer Recorded by Transient Overvoltage Monitoring System." In Lecture Notes in Electrical Engineering, 85–102. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5600-5_8.

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Perdomo, L., A. Alfonso, F. Santamaria, and F. J. Román. "Development and Characterization of a Transient Overvoltage Recorder in Distribution Networks." In Lecture Notes in Electrical Engineering, 157–70. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31676-1_16.

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Dong, Huaying, Guishu Liang, Xixiao Liu, Haifeng Sun, Xintong Yang, and Xin Liu. "A New Substitution Waveform of Very Fast Transient Overvoltage in GIS." In Electrical, Information Engineering and Mechatronics 2011, 965–72. London: Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-2467-2_113.

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Wang, Weiwang, Xilin Yan, Yong Feng, and Hantao Wang. "Electro-thermal Failure of Insulation in AC Submarine Cable Subjected by the Transient Overvoltage." In Lecture Notes in Electrical Engineering, 604–11. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1528-4_60.

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Gharehpetian, Gevork B., Atousa Yazdani, and Behrooz Zaker. "Energization Overvoltages." In Power System Transients, 133–67. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003255130-5.

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Feng, Ruming, Chuanqiang Che, Jianli Zhao, Zhilin Liu, Lei Zhao, and Qiong Wang. "Numerical Simulation Calculation Analysis of Very Fast Transient Overvoltage Arcing Characteristics in GIS Under Dynamic Arc Model." In The Proceedings of the 9th Frontier Academic Forum of Electrical Engineering, 359–67. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6606-0_34.

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Martinez-Velasco, Juan A., and Francisco González-Molina. "Calculation of Power System Overvoltages." In Transient Analysis of Power Systems, 100–194. Chichester, UK: John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118694190.ch5.

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Lv, Xiaoqin, Xiaoru Wang, and Jiwei Zheng. "Transient Overvoltage Analysis of Traction Power Supply System with Neutral Sections in China High-Speed Railway Using a State-Space Model." In Lecture Notes in Electrical Engineering, 1–14. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7989-4_1.

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Liu, Qihui, and Yong Wu. "Research on Parameter Optimization Based on Genetic Algorithm to Suppress Transient Overvoltage of LCC-HVDC System." In Advances in Transdisciplinary Engineering. IOS Press, 2021. http://dx.doi.org/10.3233/atde210272.

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Since the 1980s, the direct current (DC) transmission technology has developed rapidly in China. However, with the large-scale application of DC transmission technology, new problems are brought to the power system. Commutation failure of the DC system will cause overvoltage in the alternating current (AC) power network, which will cause great harm to the weak AC system with wind power access. Therefore, it is urgent to carry out research on overvoltage suppression at the sending end of AC system. This paper reveals the formation mechanism of transient overvoltage and confirms that the control parameters of DC system influence the voltage at the sending end directly. And the appropriate control parameters were selected to suppress the overvoltage by the parameter optimization based on genetic algorithm (GA).
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Conference papers on the topic "Transient overvoltage"

1

"Overvoltage transient protection network design." In Proceedings of the International Conference on Electromagnetic Interference and Compatibility'99. IEEE, 1999. http://dx.doi.org/10.1109/icemic.1999.871678.

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Giuntini, L. "Transient overvoltage protection for UPS applications." In 2011 IEEE PES PowerTech - Trondheim. IEEE, 2011. http://dx.doi.org/10.1109/ptc.2011.6019460.

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Lu, Peng, Xu Liu, Lijuan Wang, Jiajia Fu, Xinwen Hu, and Xiaoang Li. "Influence of operation mode on HGIS fast transient overvoltage and enclosure overvoltage." In 4th International Conference on Information Science, Electrical and Automation Engineering (ISEAE 2022), edited by Mengyi (Milly) Cen and Lidan Wang. SPIE, 2022. http://dx.doi.org/10.1117/12.2640282.

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He, Baina, Yunwei Zhao, Guichun Huang, Yuanchao Hu, and Yunzhu An. "Simulation studies on very fast transient overvoltage." In 2016 IEEE International Conference on High Voltage Engineering and Application (ICHVE). IEEE, 2016. http://dx.doi.org/10.1109/ichve.2016.7800795.

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Zhang, Qiang, Debin Han, Hui Zeng, Junjie Sun, Yao Fu, Jiabin Zhang, and Yang Liu. "Research on Transient model of Transient Enclosure Overvoltage in UHV GIS." In 2019 Chinese Automation Congress (CAC). IEEE, 2019. http://dx.doi.org/10.1109/cac48633.2019.8996200.

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Wong, H. K., and Shihe Chen. "Very fast transient overvoltage analysis for 400KV GIS." In 8th International Conference on Advances in Power System Control, Operation and Management (APSCOM 2009). IET, 2009. http://dx.doi.org/10.1049/cp.2009.1739.

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Orjuela, Luis Eduardo Perdomo, Francisco Santamaria, and Francisco Roman. "Transient overvoltage in distribution networks in rural areas." In 2016 33rd International Conference on Lightning Protection (ICLP). IEEE, 2016. http://dx.doi.org/10.1109/iclp.2016.7791433.

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Malcolm, Newman, and Raj K. Aggarwal. "Transient overvoltage study of an Island wind farm." In 2012 47th International Universities Power Engineering Conference (UPEC). IEEE, 2012. http://dx.doi.org/10.1109/upec.2012.6398450.

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de Medeiros, L. H. A., M. T. de Melo, P. R. de Freitas, M. H. L. de Sousa, and F. N. Fraga. "Analysis of real overvoltage transient in a TLM-modeled." In 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC 2010). IEEE, 2010. http://dx.doi.org/10.1109/cefc.2010.5481550.

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Dianchun Zheng, Zhonglin Zhang, Shihua Zhu, and Xiuquan Zhai. "Numerical analysis of very fast transient overvoltage in GIS." In 2011 1st International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST). IEEE, 2011. http://dx.doi.org/10.1109/icepe-st.2011.6122929.

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