Pub Date : 2021-09-20DOI: 10.1109/ICLPandSIPDA54065.2021.9627358
Luis Ignacio Colina Jimenez, M. Rock
The spark gap (SG) principles for surge protective device (SPD) implementation such as gas discharge tube (GDT), have different breakdown voltage according to the applied voltage impulse steepness. Such strong steepness dependency of the breakdown voltage produces protective problems when surge and lightning overvoltage with high impulse steepness come into play. Past investigations showed that this dependency is less for creeping discharge spark gaps (CDSG). The main problem of the CDSG is the insulation surface degradation due to discharges, which also influences the breakdown voltage under stationary conditions. This issue can be solved with the use of insulation materials with low creeping discharge degradation rates such as POM (polyoxymethylene or polyacetal). Several tests were made during this work to assess the steepness dependency using POM as insulation material. Such experiments showed that the steepness dependency is less as well for POM and confirmed the suitability of this material for implementation and use in surge and lightning protective devices.
{"title":"Measurements of surface breakdown voltage of a creeping discharge spark air gap using POM as insulation material","authors":"Luis Ignacio Colina Jimenez, M. Rock","doi":"10.1109/ICLPandSIPDA54065.2021.9627358","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627358","url":null,"abstract":"The spark gap (SG) principles for surge protective device (SPD) implementation such as gas discharge tube (GDT), have different breakdown voltage according to the applied voltage impulse steepness. Such strong steepness dependency of the breakdown voltage produces protective problems when surge and lightning overvoltage with high impulse steepness come into play. Past investigations showed that this dependency is less for creeping discharge spark gaps (CDSG). The main problem of the CDSG is the insulation surface degradation due to discharges, which also influences the breakdown voltage under stationary conditions. This issue can be solved with the use of insulation materials with low creeping discharge degradation rates such as POM (polyoxymethylene or polyacetal). Several tests were made during this work to assess the steepness dependency using POM as insulation material. Such experiments showed that the steepness dependency is less as well for POM and confirmed the suitability of this material for implementation and use in surge and lightning protective devices.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74860913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-20DOI: 10.1109/ICLPandSIPDA54065.2021.9627332
Jun Guo, M. Rubinstein, V. Cooray, F. Rachidi
T Recently, a simple and efficient method was proposed to take into account non-vertical risers for transmission lines excited by external fields. In this paper, the proposed method is used to investigate the effect of non-vertical risers on lightning-induced voltages.
{"title":"Lightning-Induced Voltage on an Overhead Transmission Line Terminated with Non-veritical Risers","authors":"Jun Guo, M. Rubinstein, V. Cooray, F. Rachidi","doi":"10.1109/ICLPandSIPDA54065.2021.9627332","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627332","url":null,"abstract":"T Recently, a simple and efficient method was proposed to take into account non-vertical risers for transmission lines excited by external fields. In this paper, the proposed method is used to investigate the effect of non-vertical risers on lightning-induced voltages.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84456023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-20DOI: 10.1109/ICLPandSIPDA54065.2021.9627347
Z. M. Khurshid, C. Gomes
This paper investigates the potential and current distribution of a grid-connected (PV) system with surge protective devices connected according to the European Commission for Electrotechnical Standardization (CENELEC) under various values of grounding resistance for isolated and integrated AC and DC earthing systems. A 400 kW PV system is implemented using PSCAD/EMTDC software, where the system is connected to a 33 kV grid through a boost transformer. The simulation results were obtained for negative subsequent lightning stroke (50% value), developed by Heidler function. The current was injected separately into both the DC and the AC sides of the PV inverter. The values of resistance of the earthing systems have been varied over a set of combinations. The results show that when the AC and DC sides are separately earthed for non-zero values of resistance, the line potentials reach very high values posing a severe risk of a system to earth arcing. The situation is worse when the lightning strikes the DC side and when the DC side earth resistance has high values. The situation improves significantly when the earthing systems are integrated. It is advisable to achieve an earth resistance below 5 Ω for the integrated earthing system.
{"title":"Impacts of Earthing Arrangement on Lightning Protection Efficiency of Grid Connected PV System","authors":"Z. M. Khurshid, C. Gomes","doi":"10.1109/ICLPandSIPDA54065.2021.9627347","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627347","url":null,"abstract":"This paper investigates the potential and current distribution of a grid-connected (PV) system with surge protective devices connected according to the European Commission for Electrotechnical Standardization (CENELEC) under various values of grounding resistance for isolated and integrated AC and DC earthing systems. A 400 kW PV system is implemented using PSCAD/EMTDC software, where the system is connected to a 33 kV grid through a boost transformer. The simulation results were obtained for negative subsequent lightning stroke (50% value), developed by Heidler function. The current was injected separately into both the DC and the AC sides of the PV inverter. The values of resistance of the earthing systems have been varied over a set of combinations. The results show that when the AC and DC sides are separately earthed for non-zero values of resistance, the line potentials reach very high values posing a severe risk of a system to earth arcing. The situation is worse when the lightning strikes the DC side and when the DC side earth resistance has high values. The situation improves significantly when the earthing systems are integrated. It is advisable to achieve an earth resistance below 5 Ω for the integrated earthing system.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81558272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-20DOI: 10.1109/ICLPandSIPDA54065.2021.9627465
A. Kern, Anahita Imani Vashiani, Tobias Timmermanns
For typical cases of non-isolated lightning protection systems (LPS) the impulse currents are investigated which may flow through a human body directly touching a structural part of the LPS. Based on a basic LPS model with conventional down-conductors especially the cases of external and internal steel columns and metal façades are considered and compared. Numerical simulations of the line quantities voltages and currents in the time domain are performed with an equivalent circuit of the entire LPS. As a result it can be stated that by increasing the number of conventional down-conductors and external steel columns the threat for a human being can indeed be reduced, but not down to an acceptable limit. In case of internal steel columns used as natural down-conductors the threat can be reduced sufficiently, depending on the low-resistive connection of the steel columns to the lightning equipotential bonding or the earth termination system, resp. If a metal façade is used the threat for human beings touching is usually very low, if the façade is sufficiently interconnected and multiply connected to the lightning equipotential bonding or the earth termination system, resp.
{"title":"Threat for human beings due to touch voltages and body currents caused by direct lightning strikes in case of non-isolated lightning protection systems using natural components","authors":"A. Kern, Anahita Imani Vashiani, Tobias Timmermanns","doi":"10.1109/ICLPandSIPDA54065.2021.9627465","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627465","url":null,"abstract":"For typical cases of non-isolated lightning protection systems (LPS) the impulse currents are investigated which may flow through a human body directly touching a structural part of the LPS. Based on a basic LPS model with conventional down-conductors especially the cases of external and internal steel columns and metal façades are considered and compared. Numerical simulations of the line quantities voltages and currents in the time domain are performed with an equivalent circuit of the entire LPS. As a result it can be stated that by increasing the number of conventional down-conductors and external steel columns the threat for a human being can indeed be reduced, but not down to an acceptable limit. In case of internal steel columns used as natural down-conductors the threat can be reduced sufficiently, depending on the low-resistive connection of the steel columns to the lightning equipotential bonding or the earth termination system, resp. If a metal façade is used the threat for human beings touching is usually very low, if the façade is sufficiently interconnected and multiply connected to the lightning equipotential bonding or the earth termination system, resp.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82758956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-20DOI: 10.1109/ICLPandSIPDA54065.2021.9627421
C. Tong, Jun Wang, Jian Xu, Yunfeng Cai, Yang Xu, Xia Hua, S. Liao, Tao Wang
With the substantial increase in global thunderstorm activities, the hazards of thunder and lightning to the security of the power grid are increasingly not to be ignored. Due to the large scale of the power grid, the small probability event that the trip of inter-provincial tie line of the same tower due to lightning strikes may still trigger the accident cascade effect of the power grid, which seriously threatens the power supply reliability of the power grid. This paper proposes an active lightning protection measure based on lightning warning which adjusts the power flow of transmission lines that are threatened by lightning strikes by controlling the output of key power sources. And it is different from the traditional static lightning protection measures such as erecting lightning shield lines. This paper also establishes a power flow transfer optimization model that takes into account system constraints such as generator output. Finally, taking the actual large-scale system of Central China Power Grid as an example, the implementation process of the proposed lightning protection strategy is simulated and analyzed, and the research results have reference value for the lightning protection of important power transmission channels.
{"title":"A power flow transfer optimization strategy for important transmission channels based on lightning early warning","authors":"C. Tong, Jun Wang, Jian Xu, Yunfeng Cai, Yang Xu, Xia Hua, S. Liao, Tao Wang","doi":"10.1109/ICLPandSIPDA54065.2021.9627421","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627421","url":null,"abstract":"With the substantial increase in global thunderstorm activities, the hazards of thunder and lightning to the security of the power grid are increasingly not to be ignored. Due to the large scale of the power grid, the small probability event that the trip of inter-provincial tie line of the same tower due to lightning strikes may still trigger the accident cascade effect of the power grid, which seriously threatens the power supply reliability of the power grid. This paper proposes an active lightning protection measure based on lightning warning which adjusts the power flow of transmission lines that are threatened by lightning strikes by controlling the output of key power sources. And it is different from the traditional static lightning protection measures such as erecting lightning shield lines. This paper also establishes a power flow transfer optimization model that takes into account system constraints such as generator output. Finally, taking the actual large-scale system of Central China Power Grid as an example, the implementation process of the proposed lightning protection strategy is simulated and analyzed, and the research results have reference value for the lightning protection of important power transmission channels.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90497514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-20DOI: 10.1109/ICLPandSIPDA54065.2021.9627413
M. Gunawardana, B. Kordi
Lightning is a major contributor for transmission line outages. Accurate modelling of transients due to lightning strikes is essential. Effects due to lightning on uniform transmission lines have been widely studied. However, modern transmission networks consist of many nonuniformities and discontinuities that can affect their transient behavior. Therefore, analysis performed based on a uniform line assumption may not be accurate. This paper presents a modification to a nonuniform transmission line model developed by the authors in a previous work to analyze the effect of a lightning strike nearby a non-uniform structure. Results are compared to those obtained using a uniform approach. Results indicate that uniform approaches can overlook details in the transient behavior of the structure.
{"title":"Modelling Transient Response of Nonuniform Transmission Lines Due to Nearby Lightning Strikes","authors":"M. Gunawardana, B. Kordi","doi":"10.1109/ICLPandSIPDA54065.2021.9627413","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627413","url":null,"abstract":"Lightning is a major contributor for transmission line outages. Accurate modelling of transients due to lightning strikes is essential. Effects due to lightning on uniform transmission lines have been widely studied. However, modern transmission networks consist of many nonuniformities and discontinuities that can affect their transient behavior. Therefore, analysis performed based on a uniform line assumption may not be accurate. This paper presents a modification to a nonuniform transmission line model developed by the authors in a previous work to analyze the effect of a lightning strike nearby a non-uniform structure. Results are compared to those obtained using a uniform approach. Results indicate that uniform approaches can overlook details in the transient behavior of the structure.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86739183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-20DOI: 10.1109/ICLPandSIPDA54065.2021.9627352
E. Shulzhenko, Kazuo Yamamoto, M. Rock
Wind power generation has expanded rapidly worldwide over the past 15 years. Europe's wind farms generated 458 TWh of electricity in 2020 and total wind energy capacity exceeded 220 GW [1] (88% onshore and 12% offshore). This covered about 16% of the electricity demand in Europe (EU27+UK) and 27% in Germany. Therefore, a reliable and safe operation of wind turbines (WT) is becoming evermore crucial. Especially high requirements are set for their lightning protection system, since due to their height and open unshielded locations WTs are assessed as very exposed structures to lightning. Most of the breakdowns and malfunctions of the electrical and control system of WT are caused by a ground potential rise (GPR) due to lightning. To investigate this issue in more details, the field measurements were carried out at the specific WT in Japan and a corresponding numerical model was designed for analyzing of lightning current distribution within the WT and arose dangerous overvoltage for electrical equipment without and with overvoltage protection measures at the tower bottom based on installation of surge arresters (SA) due to different lightning components.
{"title":"Modeling Lightning Current Distribution in Tower Base of Wind Turbine","authors":"E. Shulzhenko, Kazuo Yamamoto, M. Rock","doi":"10.1109/ICLPandSIPDA54065.2021.9627352","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627352","url":null,"abstract":"Wind power generation has expanded rapidly worldwide over the past 15 years. Europe's wind farms generated 458 TWh of electricity in 2020 and total wind energy capacity exceeded 220 GW [1] (88% onshore and 12% offshore). This covered about 16% of the electricity demand in Europe (EU27+UK) and 27% in Germany. Therefore, a reliable and safe operation of wind turbines (WT) is becoming evermore crucial. Especially high requirements are set for their lightning protection system, since due to their height and open unshielded locations WTs are assessed as very exposed structures to lightning. Most of the breakdowns and malfunctions of the electrical and control system of WT are caused by a ground potential rise (GPR) due to lightning. To investigate this issue in more details, the field measurements were carried out at the specific WT in Japan and a corresponding numerical model was designed for analyzing of lightning current distribution within the WT and arose dangerous overvoltage for electrical equipment without and with overvoltage protection measures at the tower bottom based on installation of surge arresters (SA) due to different lightning components.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88674928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-20DOI: 10.1109/ICLPandSIPDA54065.2021.9627415
K. Koutras, Evgenia Kasfiki, E. Pyrgioti
This paper provides processed data on the deaths and injuries of people and animals that occurred in Greece from 2010 to 2019 due to lightning strikes. In addition, material damage and fires caused by lightning have been recorded in facilities and buildings as well as means of transport during the same period and have been compared to the former decade. Records of deaths and injuries have been processed by year and region in an effort to correlate the number of casualties with the regions they took place. Afterwards, the relative lightning death indicator Dr is calculated for different provinces of Greece to express the relative number of lightning deaths taking into account population, area and lightning activity Ng. The correlation of data analysis with Dr helps to draw useful conclusions about the effectiveness of existing anti-lightning protection measures, the need to take additives in some areas as well as to raise awareness of the risks the population is exposed.
{"title":"Statistical Analysis of Deaths and Damages Caused by Lightning Strikes in Greece","authors":"K. Koutras, Evgenia Kasfiki, E. Pyrgioti","doi":"10.1109/ICLPandSIPDA54065.2021.9627415","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627415","url":null,"abstract":"This paper provides processed data on the deaths and injuries of people and animals that occurred in Greece from 2010 to 2019 due to lightning strikes. In addition, material damage and fires caused by lightning have been recorded in facilities and buildings as well as means of transport during the same period and have been compared to the former decade. Records of deaths and injuries have been processed by year and region in an effort to correlate the number of casualties with the regions they took place. Afterwards, the relative lightning death indicator Dr is calculated for different provinces of Greece to express the relative number of lightning deaths taking into account population, area and lightning activity Ng. The correlation of data analysis with Dr helps to draw useful conclusions about the effectiveness of existing anti-lightning protection measures, the need to take additives in some areas as well as to raise awareness of the risks the population is exposed.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88877617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-20DOI: 10.1109/ICLPandSIPDA54065.2021.9627374
R. Alípio, A. D. Conti, F. Rachidi
This paper investigates the effect of frequency-dependent soil parameters on the simulation of electromagnetic transients on overhead lines, based on the application of the FDTD method to solve the telegrapher's equations. The ground return impedance is calculated assuming either constant or frequency-dependent soil parameters. Frequency-domain results show differences in the propagation velocity and attenuation constant when assuming either constant or frequency-dependent soil parameters. Time-domain simulations considering a 230-kV line indicate that the consideration of the frequency variation of soil electrical parameters can be relevant to the simulation of high-frequency transients on transmission lines for poorly conducting soils. It is also found that this variation changes not only the amplitude but also the waveform of the resulting transient voltages. The analysis presented indicates that EMT-like tools, which traditionally assume Carson's formulation for the ground return impedance together with constant soil parameters, should be used with caution in lightning transient studies involving overhead lines above high-resistivity soils.
{"title":"Simulation of High-Frequency Transients in Overhead Lines Including Frequency-Dependent Soil Parameters: a FDTD Approach","authors":"R. Alípio, A. D. Conti, F. Rachidi","doi":"10.1109/ICLPandSIPDA54065.2021.9627374","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627374","url":null,"abstract":"This paper investigates the effect of frequency-dependent soil parameters on the simulation of electromagnetic transients on overhead lines, based on the application of the FDTD method to solve the telegrapher's equations. The ground return impedance is calculated assuming either constant or frequency-dependent soil parameters. Frequency-domain results show differences in the propagation velocity and attenuation constant when assuming either constant or frequency-dependent soil parameters. Time-domain simulations considering a 230-kV line indicate that the consideration of the frequency variation of soil electrical parameters can be relevant to the simulation of high-frequency transients on transmission lines for poorly conducting soils. It is also found that this variation changes not only the amplitude but also the waveform of the resulting transient voltages. The analysis presented indicates that EMT-like tools, which traditionally assume Carson's formulation for the ground return impedance together with constant soil parameters, should be used with caution in lightning transient studies involving overhead lines above high-resistivity soils.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78891414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-20DOI: 10.1109/ICLPandSIPDA54065.2021.9627387
M. Brignone, R. Procopio, D. Mestriner, M. Rossi, F. Delfino, F. Rachidi, M. Rubinstein
Lightning ElectroMagnetic (EM) fields represent the most cumbersome part of the lightning-induced voltages computation process. Their evaluation is usually performed through a numerical routine or with simplified analytical expressions, which are valid only assuming an infinite ground conductivity and specified channel base current waveform. This paper first briefly recalls a recently proposed analytical expression for the lightning EM fields based only on the assumption of Transmission Line model for the current propagation. Then attention is focused on the advantages of the proposed method in the computation of the lightning-induced voltages on an overhead distribution line in terms of computational time gain.
{"title":"Lightning-induced Voltages on Overhead Distribution Lines Computed through Analytical Expressions for the Electromagnetic Fields","authors":"M. Brignone, R. Procopio, D. Mestriner, M. Rossi, F. Delfino, F. Rachidi, M. Rubinstein","doi":"10.1109/ICLPandSIPDA54065.2021.9627387","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627387","url":null,"abstract":"Lightning ElectroMagnetic (EM) fields represent the most cumbersome part of the lightning-induced voltages computation process. Their evaluation is usually performed through a numerical routine or with simplified analytical expressions, which are valid only assuming an infinite ground conductivity and specified channel base current waveform. This paper first briefly recalls a recently proposed analytical expression for the lightning EM fields based only on the assumption of Transmission Line model for the current propagation. Then attention is focused on the advantages of the proposed method in the computation of the lightning-induced voltages on an overhead distribution line in terms of computational time gain.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76498098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：