Pub Date : 2016-09-01DOI: 10.1109/ICLP.2016.7791475
F. Koehler, Jonathan Swingler
For the evaluation of the back flashover risk of a whole transmission line using simulations, probability distributions of lightning strike amplitude and strike density along the line route are needed. In this paper, an evaluation procedure of electric-field based measurement data to calculate the distributions and strike density for each tower of a line is investigated. Experience and recommendations, based on the evaluation of a line route are reported.
{"title":"An evaluation procedure for lightning strike distribution on transmission lines","authors":"F. Koehler, Jonathan Swingler","doi":"10.1109/ICLP.2016.7791475","DOIUrl":"https://doi.org/10.1109/ICLP.2016.7791475","url":null,"abstract":"For the evaluation of the back flashover risk of a whole transmission line using simulations, probability distributions of lightning strike amplitude and strike density along the line route are needed. In this paper, an evaluation procedure of electric-field based measurement data to calculate the distributions and strike density for each tower of a line is investigated. Experience and recommendations, based on the evaluation of a line route are reported.","PeriodicalId":373744,"journal":{"name":"2016 33rd International Conference on Lightning Protection (ICLP)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121204508","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 : 2016-09-01DOI: 10.1109/ICLP.2016.7791489
O. Beierl, R. Brocke, F. Schork
Insulating Lightning Protection Systems (LPS) are widely used in different applications like mobile radio, industrial equipment or process industries. For the erection of such insulating LPS very often GFRP components as well as insulating down conductors are used. The use of an insulating down conductor becomes more and more relevant in lightning protection of buildings where architectural restrictions apply. It seems to be logic that the functionality of the components used in those insulating LPS has to be checked periodically. In insulating LPS where GFRP components are used a simple visual inspection is checking the mechanical condition. This simple visual inspection may not be sufficient in insulating LPS with insulating down conductors where a potential insulation damage may be very small and possibly inside the down conductor. Insulating down conductors based on coaxial structure with a low conductive coating are different from aerial or energy cables. A good conducting cover acts as a coaxial back conductor and allows the propagation of travelling waves within the cables. These travelling waves, however, cannot exist on structures with low conducting cover. The analysis of these travelling waves are the basis for the application of fault location methods used at HF and power cables. For that reason these methods cannot be applied. Obviously all established fault detection procedures which use the propagation of signals in soil are not applicable. The paper presents different electric methods of on-site dielectric testing of insulation failures in insulating down conductors. According to today's state of technology these procedures require the provocation of a minimum insulation failure on-site. Numerous investigations on damaged insulating down conductors have shown that the existence of an insulation fault can be proved by impulse testing with comparatively low voltage and energy. Different methods of fault detection are discussed by means of lab tests. Finally the paper presents a simplified integral electrical test method to check the insulation capability of the insulating down conductor on-site. The test method is based on the evaluation of the time constant of the test circuit in presence of an insulation fault. The results of first on-site tests using this method are discussed.
{"title":"On-site diagnostic of insulating down conductors","authors":"O. Beierl, R. Brocke, F. Schork","doi":"10.1109/ICLP.2016.7791489","DOIUrl":"https://doi.org/10.1109/ICLP.2016.7791489","url":null,"abstract":"Insulating Lightning Protection Systems (LPS) are widely used in different applications like mobile radio, industrial equipment or process industries. For the erection of such insulating LPS very often GFRP components as well as insulating down conductors are used. The use of an insulating down conductor becomes more and more relevant in lightning protection of buildings where architectural restrictions apply. It seems to be logic that the functionality of the components used in those insulating LPS has to be checked periodically. In insulating LPS where GFRP components are used a simple visual inspection is checking the mechanical condition. This simple visual inspection may not be sufficient in insulating LPS with insulating down conductors where a potential insulation damage may be very small and possibly inside the down conductor. Insulating down conductors based on coaxial structure with a low conductive coating are different from aerial or energy cables. A good conducting cover acts as a coaxial back conductor and allows the propagation of travelling waves within the cables. These travelling waves, however, cannot exist on structures with low conducting cover. The analysis of these travelling waves are the basis for the application of fault location methods used at HF and power cables. For that reason these methods cannot be applied. Obviously all established fault detection procedures which use the propagation of signals in soil are not applicable. The paper presents different electric methods of on-site dielectric testing of insulation failures in insulating down conductors. According to today's state of technology these procedures require the provocation of a minimum insulation failure on-site. Numerous investigations on damaged insulating down conductors have shown that the existence of an insulation fault can be proved by impulse testing with comparatively low voltage and energy. Different methods of fault detection are discussed by means of lab tests. Finally the paper presents a simplified integral electrical test method to check the insulation capability of the insulating down conductor on-site. The test method is based on the evaluation of the time constant of the test circuit in presence of an insulation fault. The results of first on-site tests using this method are discussed.","PeriodicalId":373744,"journal":{"name":"2016 33rd International Conference on Lightning Protection (ICLP)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121394397","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 : 2016-09-01DOI: 10.1109/ICLP.2016.7791337
T. Kisielewicz, G. Piparo, C. Mazzetti, F. Fiamingo
In the present paper lightning overvoltages on apparatus bonded to an extended earth arrangement are investigated. A case study of a large earthing grid (200m × 200m) covering an industrial plant is considered where a stand-alone power supply system (no connection to external lines) is supplying apparatus powered by a secondary board, earthed to a different point from the main distribution board. The values of the stressing voltage on the apparatus due to resistive coupling, the protection measures to be adopted according to the different characteristics of the lines connecting the distribution boards, and the probability of apparatus failure are evaluated. The analysis, performed by several simulations by means of the transient software EMTP-RV, show that protection against lightning of structures and of industrial plant may require the adoption of technical solutions that, even if in accordance with standards [1-4], need a particular study.
{"title":"Factors influencing the probability of an apparatus damage in an extended earthing arrangement","authors":"T. Kisielewicz, G. Piparo, C. Mazzetti, F. Fiamingo","doi":"10.1109/ICLP.2016.7791337","DOIUrl":"https://doi.org/10.1109/ICLP.2016.7791337","url":null,"abstract":"In the present paper lightning overvoltages on apparatus bonded to an extended earth arrangement are investigated. A case study of a large earthing grid (200m × 200m) covering an industrial plant is considered where a stand-alone power supply system (no connection to external lines) is supplying apparatus powered by a secondary board, earthed to a different point from the main distribution board. The values of the stressing voltage on the apparatus due to resistive coupling, the protection measures to be adopted according to the different characteristics of the lines connecting the distribution boards, and the probability of apparatus failure are evaluated. The analysis, performed by several simulations by means of the transient software EMTP-RV, show that protection against lightning of structures and of industrial plant may require the adoption of technical solutions that, even if in accordance with standards [1-4], need a particular study.","PeriodicalId":373744,"journal":{"name":"2016 33rd International Conference on Lightning Protection (ICLP)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114358594","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 : 2016-09-01DOI: 10.1109/ICLP.2016.7791355
H. Cai, L. Jia, Gang Liu, Shangmao Hu, Jian Shi, Hengxin He, Xiangen Zhao, Junjia He
Lightning stroke is the main cause of trip-outs of EHV and UHV transmission lines in China Southern Power Grid (CSG). In order to improving the lightning performance of overhead transmission lines, the lightning activities of CSG in 2006 to 2014 was analyzed. It indicates that the coastal Guangdong and Guangxi province are suffered more ground flashes, where the average ground flash density is over 7.98 flashes/km2/year. 306 lightning flashover incidents of 500kV AC, ± 500kV HVDC and ± 800kV UHVDC transmission lines were investigated. It is inferred that about 84% lightning flashover incidents was caused by lightning shielding failure. The corresponding ground wire protection angle for 81% incidents is larger than 5°, and with protection angle decreases, lightning trip-out failures are significantly reduced. Based on the guidelines proposed by IEEE and CIGRE working group, CSG has developed their own lightning risk estimation tool named LPTL. The predication result of six 500kV AC transmission lines was compared to field experience which validates the IEEE recommended method for 500kV AC transmission lines. Further works should be done to revisit the validity of existing risk estimation method for HVDC transmission lines.
{"title":"Lightning performance of EHV and UHV overhead transmission Lines in China southern power grid","authors":"H. Cai, L. Jia, Gang Liu, Shangmao Hu, Jian Shi, Hengxin He, Xiangen Zhao, Junjia He","doi":"10.1109/ICLP.2016.7791355","DOIUrl":"https://doi.org/10.1109/ICLP.2016.7791355","url":null,"abstract":"Lightning stroke is the main cause of trip-outs of EHV and UHV transmission lines in China Southern Power Grid (CSG). In order to improving the lightning performance of overhead transmission lines, the lightning activities of CSG in 2006 to 2014 was analyzed. It indicates that the coastal Guangdong and Guangxi province are suffered more ground flashes, where the average ground flash density is over 7.98 flashes/km2/year. 306 lightning flashover incidents of 500kV AC, ± 500kV HVDC and ± 800kV UHVDC transmission lines were investigated. It is inferred that about 84% lightning flashover incidents was caused by lightning shielding failure. The corresponding ground wire protection angle for 81% incidents is larger than 5°, and with protection angle decreases, lightning trip-out failures are significantly reduced. Based on the guidelines proposed by IEEE and CIGRE working group, CSG has developed their own lightning risk estimation tool named LPTL. The predication result of six 500kV AC transmission lines was compared to field experience which validates the IEEE recommended method for 500kV AC transmission lines. Further works should be done to revisit the validity of existing risk estimation method for HVDC transmission lines.","PeriodicalId":373744,"journal":{"name":"2016 33rd International Conference on Lightning Protection (ICLP)","volume":"26 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114026641","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 : 2016-09-01DOI: 10.1109/ICLP.2016.7791423
F. Tossani, A. Borghetti, F. Napolitano, C. Nucci, A. Piantini
In urban areas the presence of buildings is expected to reduce the amplitude of lightning induced voltages on overhead lines with respect to the case of open terrain. This paper presents a method for estimating such a reduction effect. For this purpose weighting functions are applied to the electrostatic, induction and radiation terms of the expressions adopted for the lightning electromagnetic field calculation assuming open terrain. The parameters of the weighting functions are identified by means of a least square fitting procedure using a finite element method model as benchmark for the field calculation. These functions are shown to be rather independent of the lightning return stroke current waveform and of the distance between the line and the stroke location. Although this paper presents only results obtained for the case of a single line, the method is conceived in order to be applicable for the lightning performance assessment of more complex power distribution networks.
{"title":"Lightning induced overvoltages on overhead lines shielded by nearby buildings","authors":"F. Tossani, A. Borghetti, F. Napolitano, C. Nucci, A. Piantini","doi":"10.1109/ICLP.2016.7791423","DOIUrl":"https://doi.org/10.1109/ICLP.2016.7791423","url":null,"abstract":"In urban areas the presence of buildings is expected to reduce the amplitude of lightning induced voltages on overhead lines with respect to the case of open terrain. This paper presents a method for estimating such a reduction effect. For this purpose weighting functions are applied to the electrostatic, induction and radiation terms of the expressions adopted for the lightning electromagnetic field calculation assuming open terrain. The parameters of the weighting functions are identified by means of a least square fitting procedure using a finite element method model as benchmark for the field calculation. These functions are shown to be rather independent of the lightning return stroke current waveform and of the distance between the line and the stroke location. Although this paper presents only results obtained for the case of a single line, the method is conceived in order to be applicable for the lightning performance assessment of more complex power distribution networks.","PeriodicalId":373744,"journal":{"name":"2016 33rd International Conference on Lightning Protection (ICLP)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115749581","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 : 2016-09-01DOI: 10.1109/ICLP.2016.7791394
Hantao Tao, S. Gu, Haitao Wang, Wanxing Feng, Juntian Guo, Yu Wang, Lei Zhang
In view of the shortcomings of traditional lightning protection measures in the initiative defense, it is necessary to research lightning warning technology, which can provide decision support for avoiding the lightning strike risks of infrastructures. This paper adopted atmospheric electric field and time-differencial calculation, combined with prediction of lightning moving trend based on Lightning Location System, achieved the technology of small-scale and short-time lightning warning for targeted areas. Finally, its effectiveness and practicality are verified by applying this method to transmission line in power grid.
{"title":"Method of lightning warning based on atmospheric electric field and lightning location data","authors":"Hantao Tao, S. Gu, Haitao Wang, Wanxing Feng, Juntian Guo, Yu Wang, Lei Zhang","doi":"10.1109/ICLP.2016.7791394","DOIUrl":"https://doi.org/10.1109/ICLP.2016.7791394","url":null,"abstract":"In view of the shortcomings of traditional lightning protection measures in the initiative defense, it is necessary to research lightning warning technology, which can provide decision support for avoiding the lightning strike risks of infrastructures. This paper adopted atmospheric electric field and time-differencial calculation, combined with prediction of lightning moving trend based on Lightning Location System, achieved the technology of small-scale and short-time lightning warning for targeted areas. Finally, its effectiveness and practicality are verified by applying this method to transmission line in power grid.","PeriodicalId":373744,"journal":{"name":"2016 33rd International Conference on Lightning Protection (ICLP)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132128768","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 : 2016-09-01DOI: 10.1109/ICLP.2016.7791454
S. Ladan, A. Aghabarati, R. Moini, S. Fortin, F. Dawalibi
The shielding effectiveness of a metallic enclosure with multiple openings sited close to a transmission line tower hit by lightning is investigated, both in the frequency domain and in the time domain. Two scenarios are analyzed to define the possible sources of interference. First, the entire power network including the tower hit by lightning, shield wires and phase conductors is considered. Next, the simplified case of a single tower hit by lightning is investigated. The results reveal that for a better protection of equipment against lightning, the entire power network should be considered as source of interference for the study of shielding effectiveness.
{"title":"Electromagnetic shielding analysis of buildings under power lines hit by lightning","authors":"S. Ladan, A. Aghabarati, R. Moini, S. Fortin, F. Dawalibi","doi":"10.1109/ICLP.2016.7791454","DOIUrl":"https://doi.org/10.1109/ICLP.2016.7791454","url":null,"abstract":"The shielding effectiveness of a metallic enclosure with multiple openings sited close to a transmission line tower hit by lightning is investigated, both in the frequency domain and in the time domain. Two scenarios are analyzed to define the possible sources of interference. First, the entire power network including the tower hit by lightning, shield wires and phase conductors is considered. Next, the simplified case of a single tower hit by lightning is investigated. The results reveal that for a better protection of equipment against lightning, the entire power network should be considered as source of interference for the study of shielding effectiveness.","PeriodicalId":373744,"journal":{"name":"2016 33rd International Conference on Lightning Protection (ICLP)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130444500","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 : 2016-09-01DOI: 10.1109/ICLP.2016.7791453
David Romero, J. A. Rey, J. Montanyà, R. Horta, G. Tobella
CFRP is becoming in an important material for the future blades due to alternative renewable energy industry plans to increase the length of the blades. This work shows some analytical results about potential distribution on a CFRP coupon obtained after applying an impulse current with different rise time. Effects around electrodes are, symmetry behavior and some interesting comments about the influence of the rise time appear. A FDTD simulation is done and a comparison between FDTD and analytical results. The aim is to evaluate how useful can be this technique when current distribution is over an anisotropic material since tests are not always possible.
{"title":"Investigation of potential distribution on a CFRP coupon under impulse current. Test results and FDTD simulation","authors":"David Romero, J. A. Rey, J. Montanyà, R. Horta, G. Tobella","doi":"10.1109/ICLP.2016.7791453","DOIUrl":"https://doi.org/10.1109/ICLP.2016.7791453","url":null,"abstract":"CFRP is becoming in an important material for the future blades due to alternative renewable energy industry plans to increase the length of the blades. This work shows some analytical results about potential distribution on a CFRP coupon obtained after applying an impulse current with different rise time. Effects around electrodes are, symmetry behavior and some interesting comments about the influence of the rise time appear. A FDTD simulation is done and a comparison between FDTD and analytical results. The aim is to evaluate how useful can be this technique when current distribution is over an anisotropic material since tests are not always possible.","PeriodicalId":373744,"journal":{"name":"2016 33rd International Conference on Lightning Protection (ICLP)","volume":"7 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133833333","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 : 2016-09-01DOI: 10.1109/ICLP.2016.7791488
A. Panicali, J. Pissolato Filho, C. Barbosa, J. C. O. Silva, N. V. B. Alves
This paper shows that the criteria for the installation of surge protective devices (SPD) in power distribution panels as prescribed in standards on lightning protection and on low-voltage electrical installations may not prevent damages of sensitive electronic equipment, regardless of the protection level of the SPD and ground impedance. This is due to a not so evident source of damages related to incidental flashovers occurring between the equipment frame and grounded structures such as the floor underneath. This paper investigates this issue from experimental and theoretical approaches and provides some procedures in order to avoid such type of damages.
{"title":"Protection of electronic equipment inside buildings: A hidden source of damages","authors":"A. Panicali, J. Pissolato Filho, C. Barbosa, J. C. O. Silva, N. V. B. Alves","doi":"10.1109/ICLP.2016.7791488","DOIUrl":"https://doi.org/10.1109/ICLP.2016.7791488","url":null,"abstract":"This paper shows that the criteria for the installation of surge protective devices (SPD) in power distribution panels as prescribed in standards on lightning protection and on low-voltage electrical installations may not prevent damages of sensitive electronic equipment, regardless of the protection level of the SPD and ground impedance. This is due to a not so evident source of damages related to incidental flashovers occurring between the equipment frame and grounded structures such as the floor underneath. This paper investigates this issue from experimental and theoretical approaches and provides some procedures in order to avoid such type of damages.","PeriodicalId":373744,"journal":{"name":"2016 33rd International Conference on Lightning Protection (ICLP)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132988368","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 : 2016-09-01DOI: 10.1109/ICLP.2016.7791487
Zilong Qin, Ming-li Chen, Baoyou Zhu
In this paper we present an half analytic electromagnetic wave model for the study of a lightning-produced VLF/LF pulse propagating in the earth-ionosphere waveguide (EIWG). The property of the lightning pulse propagating in the ionospheric D region is retrieved in frequency domain by using the Transfer Matrix Method coupled with presumed electron density and electron-collision rate profiles. With the retrieved reflection coefficients, a Ray Theory based transfer function from the lightning source to the receiver is derived. The propagation attenuation through spherical ground with presumed conductance is also calculated. The model is applied to the data from a lightning detection network in central China. The simulation results match perfectly with the ground waves and sferics observed by the network, indicating that the model is an efficient tool to investigate the interaction of the lightning pulse with the ionospheric D region and the earth's magnetic field.
{"title":"Study of earth-ionosphere waveguide effect on lightning pulse with Ray Theory","authors":"Zilong Qin, Ming-li Chen, Baoyou Zhu","doi":"10.1109/ICLP.2016.7791487","DOIUrl":"https://doi.org/10.1109/ICLP.2016.7791487","url":null,"abstract":"In this paper we present an half analytic electromagnetic wave model for the study of a lightning-produced VLF/LF pulse propagating in the earth-ionosphere waveguide (EIWG). The property of the lightning pulse propagating in the ionospheric D region is retrieved in frequency domain by using the Transfer Matrix Method coupled with presumed electron density and electron-collision rate profiles. With the retrieved reflection coefficients, a Ray Theory based transfer function from the lightning source to the receiver is derived. The propagation attenuation through spherical ground with presumed conductance is also calculated. The model is applied to the data from a lightning detection network in central China. The simulation results match perfectly with the ground waves and sferics observed by the network, indicating that the model is an efficient tool to investigate the interaction of the lightning pulse with the ionospheric D region and the earth's magnetic field.","PeriodicalId":373744,"journal":{"name":"2016 33rd International Conference on Lightning Protection (ICLP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133614909","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}
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