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Academic literature on the topic 'Corona (Electricity)'

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Published: 4 June 2021
Last updated: 1 August 2024

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Journal articles on the topic "Corona (Electricity)"

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Hajar, Ibnu, and Tito Dias Fernando. "Analisa Pengaruh Luas Penampang Penghantar dan Cuaca Terhadap Rugi Daya Akibat Korona Pada SUTT 150 kV (Studi Kasus: Gardu Induk Bangkalan – Gardu Induk Sampang)." Energi & Kelistrikan 11, no. 2 (December 17, 2019): 149–59. http://dx.doi.org/10.33322/energi.v11i2.857.

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PT. PLN (PERSERO) as a state-owned company responsible in the electricity sector is required to improve the quality of electricity transmission. In the transmission of electrical power to consumers will be got losses of power. Raising the voltage is an alternative to this problem but it creates new problems because the higher the voltage has increased the corona will occur. The impact of the corona in addition to damaging equipment, noise, and disturbing radio waves, the corona also causes power losses that are proportional to the length of the transmission line. This study uses a quantitative method, by calculating the corona power losses by comparing 4 different cross-sectional areas of the conductor and 4 different air temperatures. The results of this study found that the smaller the cross-sectional area of the conductor the power losses due to corona are smaller, conversely the greater the cross-sectional area the greater the power losses. At the smallest cross-sectional area of 282.6 mm2, the power losses that occurred were 2.013% and at the largest cross-sectional area of 378.7 mm2, the power losses were 5.251%. While the influence of air temperature, the lowest corona losses occur at 29 0C which are 1,223,886 kW and the biggest occur at 24 0C which are 1,373,419 kW, so the higher the air temperature the smaller the corona losses, conversely the lower the air temperature than the higher the corona losses that occur.
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Nugroho, Satrio Dwi, and Rudy Setiabudy. "The Corona Losses Detection Analysis at High Voltage." Jurnal Pendidikan Teknologi Kejuruan 5, no. 3 (August 31, 2022): 83–89. http://dx.doi.org/10.24036/jptk.v5i3.28423.

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The increasing use and use of electricity in Indonesia causes the potential for greater losses in the transmission and distribution system. This causes many problems that arise, one of which is the corona in the transmission and distribution system. Corona mapping can only be detected through several ways, namely sound, light and distinctive smell. In this thesis, the aim is to detect the corona with the characteristics of a distinctive sense of smell, then the results of the detection are compared with the calculated corona losses. This distinctive odor is the smell of ozone which is produced from ionization at high voltage with the surrounding air, namely oxygen to form ozone molecules that are not permanent. The metal electrode to be tested is the copper tip metal. After testing the voltage of the appearance of the corona occurs at 7kV, high voltage when testing the tip of the copper metal point at a voltage of 21 kV is greater than the corona losses. The greater the voltage, the greater the corona losses generated.
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Berezkina, T. E., S. V. Masyukevich, and N. R. Gall. "Obtaining electricity by direct transfer of charge generated in corona discharge." Technical Physics Letters 41, no. 5 (May 2015): 479–81. http://dx.doi.org/10.1134/s1063785015050211.

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Aplin, Karen L. "Atmospheric electricity at Durham: the scientific contributions and legacy of J. A. (“Skip”) Chalmers (1904–1967)." History of Geo- and Space Sciences 9, no. 1 (March 9, 2018): 25–35. http://dx.doi.org/10.5194/hgss-9-25-2018.

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Abstract. John Alan Chalmers made major contributions to atmospheric electricity over almost 40 years spent at Durham University, UK. He is particularly remembered in the atmospheric science community for his accessible and insightful textbook, Atmospheric Electricity, and his work on corona currents, which are still regularly cited. He also supervised over 35 research students. This article discusses his background, scientific contributions, and significant legacy to modern atmospheric science within the context of a long and productive career spent at one of England's principal northern universities.
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Vidan, Cristian, Nicolae Jula, Martin Timmerman, and Robby Haelterman. "Detection Of High Voltage Lines Based On Analyzing Images Received From An UAV In Order To Detect Corona Discharge." International conference KNOWLEDGE-BASED ORGANIZATION 21, no. 3 (June 1, 2015): 760–63. http://dx.doi.org/10.1515/kbo-2015-0128.

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Abstract In the high voltage domain, the Corona discharge represents one of the most disturbing problems for the companies that transport electricity. Corona discharge is an electrical discharge brought on by the ionization of a fluid surrounding a conductor that is electrically energized. To combat this phenomenon it is necessary to keep high voltage power lines under surveillance and try to maintain losses at a reasonable value. The best manner to do this thing is by using a fixed-wing unmanned aircraft vehicle having on board the necessary sensors for detecting Corona discharge. In this paper we will focus on extracting and detecting high voltage lines from the images received from an UAV which will be analyzed using a number ofMATLAB functions. To detect lines into an image the Radon transformwill be used which is an integral transform that maps a function to its integrals over lines.
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Evans, Tom, and Lachlan Newitt. "A review of corona and aeolian noise associated with overhead transmission lines." Journal of the Acoustical Society of America 154, no. 4_supplement (October 1, 2023): A290. http://dx.doi.org/10.1121/10.0023560.

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As part of the significant changes occurring in the electricity networks in Australia, there is a need to create significant new transmission infrastructure including in areas relatively close to noise-sensitive land uses. This creates a risk that noise associated with transmissions lines, namely, corona noise and aeolian noise, may occur at a sufficiently high level to result in complaints and compliance risk for the new infrastructure. This paper reviews the mechanisms that can lead to audible corona noise and aeolian noise from transmission lines, as well as information on the nature of the noise including the level and character in the context of legislative requirements that apply in Australia. Guidance is provided on measures to assess and manage the risk associated with it during the design of the infrastructure. Case studies from recent projects are presented where corona noise and aeolian noise has occurred.
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Matthews, J. C., A. J. Buckley, P. A. Keitch, M. D. Wright, and D. L. Henshaw. "Measurements of corona ion induced atmospheric electricity modification near to HV power lines." Journal of Physics: Conference Series 142 (December 1, 2008): 012044. http://dx.doi.org/10.1088/1742-6596/142/1/012044.

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Pavlov, L’uboš, L’uboš Skurčák, Juraj Chovanec, and Juraj Altus. "Impact of impedance unbalance on the efficiency of electricity transmission and distribution - A case study." Journal of Electrical Engineering 68, no. 6 (November 1, 2017): 492–95. http://dx.doi.org/10.1515/jee-2017-0086.

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Abstract This article is devoted to the analysis of the possible influence of impedance asymmetry on the efficiency of electricity transmission and distribution in the electricity system in Slovakia, at a voltage level of 110 kV - 400 kV, using synchronic phasor monitoring results. For simplicity of calculations, in practice, the impedance imbalance from mutual interfacial inductive capacitances bonds is neglected. In this way, the 3-phase network is interpreted as symmetrical in the calculations. In this case, it is possible to determine only some components of losses (ohmic losses, corona loss, leakages, etc). The influence of impedance asymmetry can be quantified by calculation using the results of the monitoring of the synchronous phasors of selected electricity system elements (OHL, transformer, choke) or by 3-phase modelling of real system elements. frequency to test the transformer for induced over voltage test, and its characteristics is analysed.
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Putra, Valentinus Galih Vidia, Irwan Irwan, Ichsan Purnama, Juliany Ningsih Mohamad, and Yusril Yusuf. "A Study of Anti-Radiation Weaving Fabric with Plasma Corona Treatment." INDONESIAN JOURNAL OF APPLIED PHYSICS 11, no. 1 (April 30, 2021): 59. http://dx.doi.org/10.13057/ijap.v11i1.40833.

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<p>In this research, Carbon black particles were applied on the woven fabric by the knife coating technique and pretreatment using plasma corona discharge to build-up conductive cotton-polyester (CVC 50%) fabric electromagnetic shielding material. This paper describes the making of anti-radiation weaving fabric using plasma technology. The anti-radiation patch was developed by first modifying the textile fabric's surface using atmospheric pressure plasma technology using tip-cylinder electrode configuration. The plasma corona discharge was generated using high voltage electricity with asymmetrical electrodes (tip and cylinder). The treated weaving fabric using plasma was then coated with carbon black ink. This research indicates that an anti-radiation weaving fabric was successfully shielded electromagnetic radiation from an electronic device.</p>
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Vidić, Igor, Matija Melnjak, and Davor Bošnjak. "How COVID-19 lockdown has impacted demand curves of Croatia and surrounding countries." Journal of Energy - Energija 70, no. 1 (March 30, 2021): 7–13. http://dx.doi.org/10.37798/202170146.

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Electrical energy is a specific commodity because it can’t be stored in significant quantities, so accurate day-ahead forecasting of total consumption plays a crucial role in stable operation of the whole power system. In order to maintain the adequacy, power generation and electricity consumption have to be constantly in a balance. Electricity demand curve is very sensitive and vulnerable to a lot of different factors that can be categorized in several main groups that include social, stochastic and weather dependent factors. In condition of global pandemic caused by COVID 19, prediction of total consumption is even more challenging task. New restrictive rules, that completely changed behavior of consumers, their daily routine and habits, have been adopted in most of the European countries. Hence, this lockdown restrictive measures affected the volume of electricity consumption and the shape of demand curves as well. This paper analyzes some of the cases with very variable electricity load, due to volatile households’ behavior, on cases of Croatia and countries in the region. Additionally, results are compared with the electricity load of Italy and Sweden whose economy and industry are well developed. Consumption of Sweden was interesting to observe because of its totally different approach of mitigating corona virus, without lockdown restrictions.
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Dissertations / Theses on the topic "Corona (Electricity)"

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Peyda, Arash. "Étude numérique et expérimentale pour déterminer le champ électrique d'apparition des décharges couronnes à l'aide de la configuration d'électrodes tige-plan = Numerical and experimental investigation to determine corona inception electric field for rod-plane electrode configuration /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2006. http://theses.uqac.ca.

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Thèse (M.Eng.) -- Université du Québec à Chicoutimi, 2006.
La p. de t. porte en outre: Mémoire présenté à l'Université du Québec à Chicoutimi comme exigence partielle de la maîtrise en ingénierie. CaQCU Bibliogr.: f. 98-101. Document électronique également accessible en format PDF. CaQCU
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Meyer, Nicholas August. "Mitigation of ozone production by negative corona using electrode wire heating." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-07112009-040234/.

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Lopes, Selma Aparecida 1974. "Estudos de propriedades de não tecidos de polipropileno tratados por descarga corona e plasma de rádio frequência." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266705.

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Orientador: João Sinézio de Carvalho Campos
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química
Made available in DSpace on 2018-08-20T20:46:43Z (GMT). No. of bitstreams: 1 Lopes_SelmaAparecida_M.pdf: 4679717 bytes, checksum: b44b60b38798f2147b5fd6fe7eacc78f (MD5) Previous issue date: 2012
Resumo: O material polimérico denominado não tecido de polipropileno (NTPP), após receber adequado tratamento químico, tem sido largamente utilizado na indústria têxtil para confecção de produtos de higiene pessoal, fraldas e absorventes descartáveis. Neste sentido o presente trabalho analisa os efeitos das técnicas de descarga corona (atmosfera ambiente) e plasma por radiofrequência (atmosferas de oxigênio (O2), nitrogênio (N2) e argônio (Ar) causados nas propriedades de superfície de amostras de NTPP em função do tempo de tratamento e nas respectivas atmosferas citadas. Recortam-se amostras de NTPP com geometria retangular (10x30mm) e espessura média de 40?m. Após tratamentos por corona e plasma submetem-se as amostras ás técnicas de medidas de ângulo de contato (método da gota séssil), de espectrometria em infravermelho (FTIR/ATR), de microscopia eletrônica exploratória (SEM) e de calorimetria diferencial exploratória (DSC); as quais têm por objetivo caracterizar a superfície do material em relação à molhabilidade, a formação de grupos polares, alterações morfológicas e comportamento de volume, respectivamente. Realizaram-se as medidas em quintuplicatas e dentre os resultados pode-se destacar que (i) o ângulo de contato tende a diminuir com o aumento do tratamento tanto corona quanto plasma, indicando que está ocorrendo aumento da molhabilidade do material, assim como comprovado por cálculos de energia livre de superfície (por exemplo: sem tratamento 18 mN/m e após tratamento 87 mN/m); (ii) as espectrometrias em infravermelho indicam a formação de grupos polares (hidroxílicos e carboxílicos); (iii) os termogramas em DSC indicam que não há alterações entre amostras com e sem tratamento, preservando assim propriedades de volume do material (estabilidade térmica de 0 á 135ºC e Tm=162ºC). Cabe ressaltar que realizaram-se medidas sobre a durabilidade do tratamento corona e os resultados mostram satisfatória durabilidade até 4 dias
Abstract: The polymeric material known as non-woven polypropylene (NTPP) upon receiving suitable chemical treatment has been widely used in the textile industry for the manufacture of personal hygiene products, diapers and disposable absorbent. In this sense the present paper analyzes the effects of corona discharge techniques (ambient atmosphere) and plasma radiofrequency (atmospheres of oxygen (O2), nitrogen (N2) and argon (Ar) caused the surface properties of samples as a function NTPP treatment time and the respective atmospheres cited. Samples were cut out NTPP rectangular geometry (10x30mm) and an average thickness of 40?m. After corona treatment and plasma samples were subjected techniques measures the contact angle (sessile drop method), infrared spectrometry (FTIR/ATR), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) which are intended to characterize the material surface with respect to wettability, the formation of polar groups, and morphological behavior volume, respectively. There were measures in quintuplicatas and among the results can be noted that (i) the contact angle tends to decrease with the increase in both corona treatment and plasma, indicating that it is an increase of the wettability of the material, as evidenced by calculations of surface free energy (for example, untreated 18 mN/m after treatment 87 mN/m; (ii) infrared spectroscopy indicated the formation of polar groups (hydroxyl and carboxyl); (iii) the DSC thermograms show no charges between treated and untreated samples, thus maintaining properties of the material volume (thermal stability of 0 to 135ºC and Tm=162ºC). It should be noted that measurements were performed on the stability of the corona treatment and the results show satisfactory stability up to 4 days
Mestrado
Ciencia e Tecnologia de Materiais
Mestre em Engenharia Química
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Atkinson, R. Dwight. "Corona switching: an osmogene mitigation technique." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/49920.

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Odorous gases such as hydrogen sulfide have long been associated with wastewater treatment plants, especially those with long forced mains which allow septic conditions to develop. With the encroachment of urban and suburban populations, many wastewater treatment plants are no longer located far enough from residential areas to prevent odor problems. This has lead to renewed efforts to develop odor control techniques. The application of high energy coronas as a means to oxidize odorous gases has been limited by the relatively small size of the corona region around a given charged wire, approximately 1 centimeter at an applied voltage of 35 kilovolts. Attempts to enlarge the effective corona region by spacing wires such that their coronas would overlap have failed due to corona extinction, the destructive interference of the electric fields surrounding adjacent charged wires. This study demonstrates that corona extinction can be avoided in a system of closely spaced wires flanked by grounded plates if the wires are energized individually instead of' simultaneously. By employing a rapid load-switching technique an essentially continuous corona sheet can be produced. A bench-scale device utilizing the rapid switching principle was constructed and its ability to remove odorous gases, including hydrogen sulfide, was demonstrated. The influence of parameters such as flowrate, inlet concentration, switching frequency, temperature, and humidity on removal efficiency was evaluated.
Ph. D.
incomplete_metadata
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Du, Toit Nicolaas Serdyn. "Calibration of UV-sensitive camera for corona detection." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/1016.

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Dorris, Kevin Scott. "A possible new source of nitrogen oxides : atmospheric electrical corona." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/25885.

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Evans, John Lee. "Corona discharge and arcing around wires under the influence of high electric fields." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/52118/.

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An Electromagnetic Pulse (EMP) resulting from, for example, the detonation of a nuclear weapon is characterised by a wave of electromagnetic activity able to couple with power lines and electro-sensitive equipment with the potential of rendering an establishment or on a greater scale, a whole city impotent. Protection against such occurrences is of paramount importance. It is now accepted that an important consideration when devising protective schemes against such phenomena is an accurate understanding of the effects on propagating waveforms such as those coupled to wires, when electrical breakdown of the dielectric material surrounding such wires occurs, otherwise known as electrical discharge. Such issues can occur around the affected wires if the electric fields generated exceed the dielectric strength of the surrounding medium, typically air or soil. Under these circumstances, the signature of the coupled waveform is known to change in characteristic ways. The form and degree of distortion needs to be understood if the harmful effects are to be prevented by protection systems put in place. The purpose of this thesis is to first describe the mechanisms that lead to the development of the Nuclear–Electromagnetic Pulse (NEMP) and the mechanisms of the discharge that can result once such pulses have coupled to a wire. Next, some of the previous corona-modelling approaches are discussed. Many of the modelling approaches have been applied to 1-D transmission-line simulations. When 3-D simulations have been performed, the Finite-Difference (Time Domain) or FD-TD approach seems to be the preferred method. At the time of writing, no 3-D Transmission Line simulations of discharge phenomena around wires were available. Hence, here, the 3-D Transmission Line Modelling Method (TLM) is described with a view to modelling such behaviour. In particular, the Embedded-Wire-Node (EWN) is used to model the discharge development around the wire. This is a fine-wire technique used to reduce computational fatigue. The node can be adapted to accept changes related to electrical discharge allowing for a real-time, self-consistent recreation of such effects. The 3-D TLM approach proves to be a decent candidate to the modelling of such behaviour. Both advantages and disadvantages of this method are discussed.
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Urban, Rodney Gordon. "Power line corona noise prediction from small cage measurement." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50063.

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Thesis (PhD) -- Stellenbosch University, 2004.
Some digitised pages may appear illegible due to the condition of the original hard copy.
ENGLISH ABSTRACT: The radio noise (RN) performance of an AC high voltage transmission line is a determining factor when accessing the reliability of the design. The conducted RN level across the terminals of a PLC receiver, used in the teleprotection system of the line, is of particular concern. In this dissertation, existing empirical and semi-analytical RN prediction methods are evaluated by comparing the conducted RN levels of four South African lines to the predicted levels. Existing RN measurement protocols are consolidated and a new RN measurement protocol is proposed for the comparison. A prediction methodology, based on the EdF, EPRI and IREQ semi-analytical methods, is formulated. The semi-analytical methods are not able to accurately predict the variation of the conducted RN with frequency in the PLC band, nor are they able to predict the RN performance of short lines. A wideband excitation function, which considers the statistical characteristics of the measured RN pulse train, is therefore proposed in this dissertation. Having investigated the extraction of this excitation function from ESKOM’s Megawatt Park corona cage, it is concluded that a small corona cage is required. The design of a small cage is presented and the extraction of the excitation function is described. Attention is given to assessing the effect of changes in space charge distributions. The effect of space charge collision with an insulated cage on the extracted pulse parameters is linear, provided space charge diffusion is negligible. The onset streamer, positive streamer and negative streamer corona modes were identified as the only modes with measurable RN in the frequency regime 150 kHz to 30 MHz. Formulas are derived for the prediction of the inception gradients for these modes. The RN performance of an ACSR Hare conductor is extracted from the small cage. The RN performance of the Acacia-Koeberg line is also approximated in the PLC band. The dissertation concludes that the proposed wideband excitation function method is capable of accurately predicting the variation of RN levels with frequency. It can also be used to predict the RN performance of short line sections, as well as the relationship between RMS, QP and average RN levels from a transmission line.
AFRIKAANSE OPSOMMING: Die korona-werkverrigting van ‘n WS hoogspanningstransmissielyn het belangrike gevolge vir die betroubaarheid van die ontwerp van die lyn. Die geleide radioruis (RR) vlak op die kraglyndragolf kommunikasie sisteem, wat vir tele-beveiliging gebruik word, is veral van belang. In hierdie werkstuk word bestaande metodes gebruik om die korona-werkverrigting te bepaal en dan met gemete waardes van vier Suid Afrikaanse lyne te vergelyk. Bestaande RR meetmetodes word saamgevat en ‘n nuwe metingsprotokol word voorgestel om resultate te vergelyk. Na aanleiding van hierdie vergelykings word ‘n tegniek ontwikkel om die RR van ‘n lyn te voorspel. Hierdie tegniek gebruik die EdF, EPRI en IREQ metodes. Die voorgestelde tegniek kan nie die verandering van die RR met frekwensie bepaal nie. Dit kan ook nie die RR van kort lyne bepaal nie. ‘n Wyeband RR bron word dus voorgestel. Nadat ESKOM se Megawatt Park korona-kou ondersoek is, is die gevolgtrekking gemaak dat ‘n klein koronakou die nodige wyeband RR bron sal voorsien. Ruimtelading bots met die klein korona-kou. Die effek van hierdie botsings op die pulsparameters is lineer indien ladingsdiffusie nie plaasvind nie. Die aanvangs, positiewe en negatiewe kanaalontladings (“streamers”) is identifiseer as die enigste koronamodusse wat RR veroorsaak tussen 150 kHz en 30 MHz. Die spanning waarby hierdie modusse voorkom, is bepaal. Die korona-werkverrigting van ‘n “ACSR Hare” geleier is bepaal. Die korona-werkverrigting van die Acacia-Koeberg transmissie lyn is ook gekwantifiseer by die kraglyn-dragolf kommunikasie frekwensies. Die wyebandbron metode kan die verandering in RR met frekwensie goed voorspel. Die nuwe metode kan ook gebruik word om die RR van kort lyne te bepaal, asook die verband tussen RMS, QP en gemiddelde RR vlakke.
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Hansell, Fredrik, and Axel Vällfors. "Demand Side Management : how has residential electricity demand changed during the corona pandemic?" Thesis, KTH, Energiteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298849.

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Restrictive social distancing measures imposed by governments across the world to prevent the spread of COVID-19 have led to immediate changes in general behaviour and habits, which has had major effects on electricity systems. The pandemic has highlighted the great importance of reliable electricity supply in society as many people were forced to start working from home and thus became entirely reliant on digital modes of communication and information sharing. However, the resilience of energy systems could become weakened in the future as the share of intermittent renewable energy sources keeps increasing. If working from home were to become the norm in the future, knowing how households’ electricity load curves are affected by such a change could be valuable and help increase capabilities of demand side flexibility in the household sector. In this project, appliance-level electricity demand data gathered from Swedish households is used to create a simple bottom-up model. The purpose of the model is to be able to evaluate how the total electricity demand in a residential area changes after implementing behavioral changes at a household level. Specifically, the model was used to evaluate the effect of certain households in a region switching to working from home. Results were obtained from the model in the form of estimated changes in the electricity demand for different proportions of teleworking households. These changes were then combined with electricity demand data from a residential area in Stockholm to create new load curves that show what electricity demand could look like for the residential area at different shares of households working from home. The final results are presented in the form of estimated changes in electricity demand, peak power and electricity consumption for 30, 60 and 90 percent of households working from home.The results showed that weekdays' average load profile may have changed considerably in 2020 for residential areas similar to the one studied in Stockholm. For all scenarios, the change in electricity demand was most noticeable in the middle of the day, when the peak power increased significantly. During the evening, however, neither the electricity demand nor the power peak changed significantly. The peak power during normal working hours increased by 11,6% to 17,1% depending on the season, while total electricity consumption on an average weekday increased by 4,9% to 7,4% compared to pre-pandemic values. Still, the overall weekday power peak typically occurring around dinner time remained nearly unchanged. However, examining the results for different shares of households working from home shows that if almost all were to work from home, the overall peak power could shift from occurring in the evening to the middle of the day. If a new measurement campaign of Swedish households were to be conducted in the future, the ability to predict and prepare for the electricity demand of tomorrow’s homes would improve greatly.
I ett försök att förhindra spridningen av viruset COVID-19 har länder världen över infört sociala restriktioner som i många fall medfört drastiska förändringar av invånarnas vanor och beteenden samt en omfattande påverkan på landets elsystem. Pandemin har framhävt vikten av tillförlitlig elförsörjning i samhället i och med att många har tvingats börja arbeta hemifrån och således blivit helt beroende av digital kommunikation och informationsdelning. Energisystemens motståndskraft kan dock komma att försvagas i framtiden i takt med att andelen intermittenta förnybara energikällor fortsätter att öka. Om distansarbete skulle bli det nya normala i framtiden kan det vara värdefullt att känna till hur det påverkar hushållens belastningskurvor. Kunskapen kan även bidra till ökade möjligheter för flexibilitet på efterfrågesidan i hushållssektorn. I det här projektet används elbehovsdata på apparatnivå från ett stort antal svenska hushåll för att skapa en enkel bottom-up-modell över hushålls elförbrukning. Modellens syfte är att genom implementering av beteendeförändringar på en hushållsnivå kunna utvärdera hur det totala elbehovet i ett bostadsområde förändras. Specifikt användes modellen för att utvärdera effekten av att vissa hushåll i en region går över till distansarbete. Resultat erhölls från modellen i form av uppskattade förändringar av elbehovet vid olika andelar distansarbetande hushåll. Dessaförändringar kombinerades sedan med elbehovsdata från ett bostadsområde i Stockholm för attskapa nya belastningskurvor som visar hur elbehovet kan se ut för bostadsområdet vid olikaandelar distansarbetande hushåll. De slutgiltiga resultaten presenteras i form av uppskattade förändringar av elbehov, effekttoppar och elförbrukning vid 30, 60 och 90 procents andel distansarbetande hushåll. Resultaten visade att vardagars genomsnittliga belastningsprofil kan ha förändrats markant under 2020 för bostadsområden likt den studerade i Stockholm. För samtliga scenarier var förändringen i elbehovet mest märkbar mitt på dagen då effekttoppen ökade avsevärt. Under kvällstid förändrades dock varken elbehovet eller effekttoppen avsevärt. Effekttoppen under normala arbetstider ökade mellan 11,6% och 17,1% beroende på årstid, medan elförbrukningenen genomsnittlig vardag ökade med mellan 4,9% och 7,4% jämfört med innan pandemin.  Kvällens effekttopp, som vanligtvis inträffar runt middagstid, var i princip oförändrad. Däremot visar resultaten att i ett scenario där en mycket hög andel av befolkningen arbetar hemifrån kan den högsta effekttoppen inträffa mitt på dagen istället för på kvällen. För framtiden skulle en ny mätkampanj som kartlägger de svenska hushållens elförbrukning kunna medföra ökade möjligheter för samhället att förbereda sig inför och förutse morgondagens elbehov.
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10

Silva, Rodrigo Cleber da [UNESP]. "Inclusão das representações de gary e de skilling-umoto em modelos de linhas de transmissão trifásicas: Aplicação em simulações de transitórios eletromagnéticos em sistemas de energia elétrica." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/134103.

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Made available in DSpace on 2016-02-05T18:29:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-08-25. Added 1 bitstream(s) on 2016-02-05T18:33:44Z : No. of bitstreams: 1 000857565.pdf: 1726285 bytes, checksum: acf252e5a46ceced5c2b1b64ccd59cc7 (MD5)
Neste projeto é desenvolvido um modelo de linha de transmissão trifásica em que possa ser incluído o efeito corona. O modelo será desenvolvido diretamente no domínio do tempo e o mesmo baseia-se na hipótese de que um pequeno segmento de linha trifásica pode ser representado por um circuito constituído por elementos discretos (resistências, indutâncias, capacitâncias e condutâncias). A inserção do efeito corona no modelo da linha será feito com base nos modelos de Gary e de Skilling-Umoto que, até o presente momento, é utilizado para inserir o efeito corona em modelos de linhas de transmissão monofásicas. O modelo a ser desenvolvido poderá ser utilizado para representar linhas trifásicas genéricas, independentemente da geometria da mesma, em simulações de transitórios eletromagnéticos que podem ocorrer em sistemas de energia elétrica. A grande contribuição que resultará do desenvolvimento deste projeto será a disponibilização de um modelo de linha mais completo que os modelos disponíveis atualmente, pois o modelo proposto poderá ser aplicado em qualquer linha trifásica, independentemente da geometria da mesma, e levará em conta o efeito corona (que é responsável por distorções nas formas de ondas de correntes e tensões que se propagam ao longo da linha durante a ocorrência de distúrbios). Um modelo de linha mais precisa que prevê tais distorções, poderá ser útil na análise do sistema de proteção, permitindo um ajuste mais preciso e aumentando a confiabilidade do sistema de energia elétrica
In this project will be developed a model for three-phase transmission line that may be included in the corona effect. The model will be developed directly in the time domain and the same is based on the hypothesis that a short segment of three phase line can be represented by a circuit constituted by discrete elements (resistance, inductance, capacitance, and conductance). The insertion of the corona effect in the line model will be based on Gary and Skilling-Umoto models that, until the present time, is used to insert the corona effect in models of transmission lines monophasic. The model to be developed can be utilized to represent generic three-phase lines, regardless of the line geometry, in electromagnetic transient simulations that can occur in electrical power systems. The great contribution that will result from the development of this project will be the making available of a model line more complete than the currently available models, since the proposed model can be applied to any three-phase line, regardless of the geometry of the line, and will take into consideration the corona effect (which is responsible for distortions in the waveforms of voltages and currents that propagate along the line during the occurrence of disturbance). A more accurate model line that provides for such distortions may be useful in the analysis of the protection system, allowing for a more precise fit and increasing the reliability of the electric power system
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Books on the topic "Corona (Electricity)"

1

United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., ed. Asymptotic analyses of corona discharge from thin electrodes. [Washington, D.C.]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1987.

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Yovcheva, T. A. Corona charging of synthetic polymer films. Hauppauge, N.Y: Nova Science Publishers, 2009.

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Vereshchagin, I. P. Koronnyĭ razri͡a︡d v apparatakh ėlektronno-ionnoĭ tekhnologii. Moskva: Ėnergoatomizdat, 1985.

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Kocik, Marek. Laserowa diagnostyka wyładowania koronowego w reaktorach plazmy nierównowagowej w powietrzu i wodzie. Gdańsk: Wydawnictwo IMP PAN, 2011.

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Society, IEEE Power Engineering, ed. Corona and field effects of AC overhead transmission lines: Information for decision makers. New York, NY (345 E. 47th St., New York 10017-2394): IEEE Power Engineering Society, 1985.

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M, Dzhuvarly Ch. Koronnyĭ razri͡a︡d v ėlektrootrit͡s︡atelʹnykh gazakh. Baku: Izd-vo "Ėlm", 1988.

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Noda, Taku. Development of a transmission-line model considering the skin and corona effects for power systems transient analysis. [Kyoto, Japan]: Noda, 1996.

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B, Loeb Leonard. Electrical Coronas: Their Basic Physical Mechanisms. University of California Press, 2022.

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B, Loeb Leonard. Electrical Coronas: Their Basic Physical Mechanisms. University of California Press, 2022.

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Qin, Bai-Lin. High voltage dc bipolar corona via particle-in-cell simulation. 1993.

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Book chapters on the topic "Corona (Electricity)"

1

Sokol, Yevgen, Vitalii Babak, Artur Zaporozhets, Oleg Gryb, Ihor Karpaliuk, and Roman Demianenko. "Development of Approaches to the Quality of Electricity Supply." In Detection of Corona Discharge in Electric Networks, 1–23. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-44025-0_1.

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Gaikwad, Hemlata Vivek, Aniket Suresh Pardeshi, and Suruchi Pandey. "Surmounting the Five-Headed Dragon." In EdTech Economy and the Transformation of Education, 157–67. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-8904-5.ch009.

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In India when all educational institutes were closed in March, the delivery of knowledge shifted completely to online mode overnight. In the current age of technology and to combat the corona crisis, this online learning approach was highly commendable. There were phenomenal challenges, like a significant proportion of the rural population in Maharashtra continues to fall short of the required internet bandwidth and knowledge to recognize devices and digital terminologies. The absence of supporting infrastructural facilities such as a stable flow of electricity and unavailability of high-speed internet is the second major issue involved. Despite these challenges, a few technical institutes in Maharashtra had worked hard on surmounting the five-headed dragon, namely rural settings, first-generation learners, digital illiteracy, lack of supporting infrastructure, and inadequate online teaching skills. The chapter will present the educational transformations brought in by these technical institutes during and post-pandemic and the way forward to rethink learning in the new normal.
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Lewandowski, Krzysztof. "Bezpieczeństwo energetyczne Europy w obliczu zjawiska pogody kosmicznej. Problem CME – koronalnych wyrzutów masy na Słońcu." In Polityka kosmiczna Unii Europejskiej: Zagadnienia prawne, polityczne i ekonomiczne, 141–61. Ksiegarnia Akademicka Publishing, 2022. http://dx.doi.org/10.12797/9788381387750.07.

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The chapter deals with the problem of protecting the electricity grid in Europe in the face of changes in the activity of the Sun. The growing demand for electricity, in the face of the progressive depletion of non-renewable fossil fuels, suggests the use of renewable energy sources as those that help increase the resistance of electric networks against crashes caused Coronal Mass Ejection (CME) in the Sun. This is even more justified as the CMEs have had a painful effect on all humankind in the past, impacting telegraph networks in 1859, and electric networks in 1921. The author suggests that this problem should be given consideration as part of the European Union’s space policy.
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Lee, Geraldine, Gabrielle McKee, Andreas Protopapas, and Ian D. Jones. "Anatomy and physiology of the healthy heart." In ESC Textbook of Cardiovascular Nursing, edited by Catriona Jennings, Felicity Astin, Donna Fitzsimons, Ekaterini Lambrinou, Lis Neubeck, and David R. Thompson, 81–110. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780198849315.003.0004.

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A normally functioning heart is essential to create a pressure gradient in the blood vessels that will enable blood flow to the organs. The coronary circulation is adapted to meet the high metabolic needs of the heart because it has a greater blood flow, an extensive capillary network, and greater oxygen extraction than other organs. The heart contains myocardial cells and autorhythmic cells that enable it to conduct electricity and contract, respectively. While the heart possesses its own internal automaticity, its activity is influenced by a combination of factors, the most important of which are neural and hormonal. Heart rate is ordinarily determined by the pacemaker activity of the sinoatrial node, which has the highest intrinsic firing rate of the automaticity cells. The cardiac cycle describes all of the activities of the heart through a single complete heartbeat. The 12-lead electrocardiogram is composed of specific components that reflect the action potential—P wave, QRS complex, and T wave. A 12-lead electrocardiogram should be reviewed in a logical, comprehensive manner examining each of the leads so that rate, rhythm, axis, and any abnormalities can be detected.
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Conference papers on the topic "Corona (Electricity)"

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Rison, W., K. Cummins, P. Krehbiel, J. Myers, M. Quick, R. Thomas, and D. Rodeheffer. "Observations of Corona Discharges from Wind Turbines." In International Conference on Lightning [amp ] Static Electricity (ICOLSE 2015). Institution of Engineering and Technology, 2015. http://dx.doi.org/10.1049/ic.2015.0195.

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Bo Hu, Li-Xin Ma, Shu-Juan Yuan, and Bai Yang. "New corona ultraviolet detection system and fault location method." In 2012 China International Conference on Electricity Distribution (CICED). IEEE, 2012. http://dx.doi.org/10.1109/ciced.2012.6508475.

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Chengjiang Wang, Zhibin Jia, Yi Yang, Yukai Gu, and Xiujie Jiang. "Experiment and research of acoustics emission of corona discharge." In 2006 China International Conference on Electricity Distribution (CICED 2006). IEE, 2006. http://dx.doi.org/10.1049/cp:20061718.

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Wang, M., and A. Chabory. "Radiation of corona discharges in the VHF aeronautical band." In International Conference on Lightning [amp ] Static Electricity (ICOLSE 2015). Institution of Engineering and Technology, 2015. http://dx.doi.org/10.1049/ic.2015.0165.

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Perala, Rodney A., and Henry S. Weigel. "Radius of Currative Effects for Corona or Arc Development on Floating Conducting Bodies." In International Conference on Lightning and Static Electricity. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1999. http://dx.doi.org/10.4271/1999-01-2367.

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Hairui Xu, Li Wang, Guangli Zhao, Wei Zhang, Zhu Zhan, Yaxu Cao, and Huidong Jia. "Research on environmental factors of positive DC corona inception voltage of overhead transmission lines." In 2012 China International Conference on Electricity Distribution (CICED). IEEE, 2012. http://dx.doi.org/10.1109/ciced.2012.6508494.

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Cao, Jing, Shanshan Quan, Jinxiang Liang, Lili Gu, and Zongren Peng. "Modeling Simulation and Testing Research on Corona Discharge of Dampers for AC Transmission Line." In 2016 China International Conference on Electricity Distribution (CICED). IEEE, 2016. http://dx.doi.org/10.1109/ciced.2016.7576030.

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Jinxiang, Liang, Jiang Lin, Li Weidong, and Pen Lei. "Corona Discharge Characteristics for Conductors of HVDC Transmission Lines with Different Heights to Groud." In 2018 China International Conference on Electricity Distribution (CICED). IEEE, 2018. http://dx.doi.org/10.1109/ciced.2018.8592569.

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Marusauskas, Vaidotas, Saulius Gudzius, Audrius Jonaitis, Jonas Vaicys, Tomas Merfeldas, and Alfonsas Morkvenas. "Modelling Corona Discharge Characteristic in Electricity Transmission Lines for Fault Detection System." In 2020 24th International Conference Electronics. IEEE, 2020. http://dx.doi.org/10.1109/ieeeconf49502.2020.9141607.

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Shane, Theresa N. "Investigation of Corona Threshold Voltages on International Space Station U.S. Laboratory and Airlock Orbital Replacement Units." In International Conference on Lightning and Static Electricity. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-01-2899.

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Reports on the topic "Corona (Electricity)"

1

Hayat, Muhammad Adnan, Khalid Alhadhrami, and Amro Elshurafa. Challenges and Opportunities for Sustainable Deployment of Bioenergy with Carbon Capture and Storage Pathways (BECCS) Globally. King Abdullah Petroleum Studies and Research Center, November 2023. http://dx.doi.org/10.30573/ks--2023-dp28.

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Countries are exploring various options to achieve net-zero emissions, including bioenergy with carbon capture and storage (BECCS), which is the process of capturing and storing carbon dioxide (CO2) from processes that utilize bioenergy to produce heat, electricity or biofuels. However, this technology faces sustainability concerns, an unclear public perception and has complex value chains for its emissions. Adding to this complexity, the literature presents two opposing views regarding the potential of BECCS to achieve negative emissions. This paper analyzes in detail a wide range of BECCS pathways in terms of their ability to achieve negative emissions and their associated costs. Out of the seven assessed pathways, our analysis shows that the corn-to-ethanol and biomethane-production-from-maize BECCS pathways in the U.S., along with biomethane production from wet manure in Europe and baling of straw pellets with trans-Atlantic shipment, can achieve negative emissions at a cost of 50, 108, 159 and 232 dollars per ton of CO2 ($/tCO2), respectively. Other technologies, such as poplar pellets, forest residue and agricultural residue with trans-Atlantic shipments, are not able to achieve negative emissions.
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