Pub Date : 2015-11-30DOI: 10.1109/SIPDA.2015.7339336
G. Podporkin, E. Y. Enkin, V. Zhitenev, R. I. Zainalov, V. E. Pil’shchikov, D. Belko
The paper presents an alternative to the traditional method of lightning protection of 35 kV overhead lines based on shield-type multi-chamber arresters. The main stages of the design of arrester, and also shows the test results confirming compliance with required characteristics.
{"title":"Development of shield-type multi-chamber lightning arrester for 35kV OHL","authors":"G. Podporkin, E. Y. Enkin, V. Zhitenev, R. I. Zainalov, V. E. Pil’shchikov, D. Belko","doi":"10.1109/SIPDA.2015.7339336","DOIUrl":"https://doi.org/10.1109/SIPDA.2015.7339336","url":null,"abstract":"The paper presents an alternative to the traditional method of lightning protection of 35 kV overhead lines based on shield-type multi-chamber arresters. The main stages of the design of arrester, and also shows the test results confirming compliance with required characteristics.","PeriodicalId":296478,"journal":{"name":"2015 International Symposium on Lightning Protection (XIII SIPDA)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123705057","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 : 2015-11-30DOI: 10.1109/SIPDA.2015.7339289
Lipeng Liu, M. Becerra
In the past twenty years, there has been a growing concern regarding the effect of space charge produced by glow corona on lightning attachment. Several studies have been reported in the literature to evaluate the generation and drift of space charge generated by glow corona from the top of high grounded objects under thunderstorm conditions, using one (1D) or two (2D) dimensional simulations. Unfortunately, the actual transition from glow corona to streamers cannot be numerically evaluated in these studies since the ionization layer was ignored. Thus, a fully 2D detailed evaluation of the glow corona to streamer transition in air is reported, which considers the non-equilibrium ionization layer around a scaled lightning rod. The transition criterion is obtained by changing the applied voltage with different rise rates (dV/dt) after a stable glow corona is formed. The discharge currents as well as the distributions of positive ions, electrons and electric field during the transition of glow corona to streamers are presented. Based on the simulation results, a case study regarding a real lighting rod under thunderstorms is performed. The analysis indicates that streamers can be incepted in the presence of glow corona from both the tip and body of lightning rods under the influence of distant downward stepped leaders.
{"title":"Two-dimensional simulation on the glow to streamer transition from lightning rods","authors":"Lipeng Liu, M. Becerra","doi":"10.1109/SIPDA.2015.7339289","DOIUrl":"https://doi.org/10.1109/SIPDA.2015.7339289","url":null,"abstract":"In the past twenty years, there has been a growing concern regarding the effect of space charge produced by glow corona on lightning attachment. Several studies have been reported in the literature to evaluate the generation and drift of space charge generated by glow corona from the top of high grounded objects under thunderstorm conditions, using one (1D) or two (2D) dimensional simulations. Unfortunately, the actual transition from glow corona to streamers cannot be numerically evaluated in these studies since the ionization layer was ignored. Thus, a fully 2D detailed evaluation of the glow corona to streamer transition in air is reported, which considers the non-equilibrium ionization layer around a scaled lightning rod. The transition criterion is obtained by changing the applied voltage with different rise rates (dV/dt) after a stable glow corona is formed. The discharge currents as well as the distributions of positive ions, electrons and electric field during the transition of glow corona to streamers are presented. Based on the simulation results, a case study regarding a real lighting rod under thunderstorms is performed. The analysis indicates that streamers can be incepted in the presence of glow corona from both the tip and body of lightning rods under the influence of distant downward stepped leaders.","PeriodicalId":296478,"journal":{"name":"2015 International Symposium on Lightning Protection (XIII SIPDA)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130140185","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 : 2015-11-30DOI: 10.1109/SIPDA.2015.7339326
W. Valente, A. Raizer, V. L. Coelho, Carlos Iran Cardoso
This work aims to perform an analysis of different numerical and analytical prediction techniques for obtaining the impedance of grounding systems in power substations according to the Fall-of-Potential Method. A test field with 4 grounding meshes of different geometric configurations was implemented and used to evaluate the quality of the results obtained in this study. Two analytical models found in the technical literature (ABNT Standard and Laurent's equation) and four different methods of numerical simulation (TLM - transmission line method, FEM -finite elements method, PM - potential method, CEEE computing platform) were used to evaluate the phenomenon and estimate the grounding resistance for the 4 meshes of the test field. The numerical results are compared to results obtained in a series of measurement tests which employed megger and two types of surge generators, in order to provide an overall understanding of this problem.
{"title":"Ground impedance assessment employing earth measurements, numerical simulations, and analytical techniques","authors":"W. Valente, A. Raizer, V. L. Coelho, Carlos Iran Cardoso","doi":"10.1109/SIPDA.2015.7339326","DOIUrl":"https://doi.org/10.1109/SIPDA.2015.7339326","url":null,"abstract":"This work aims to perform an analysis of different numerical and analytical prediction techniques for obtaining the impedance of grounding systems in power substations according to the Fall-of-Potential Method. A test field with 4 grounding meshes of different geometric configurations was implemented and used to evaluate the quality of the results obtained in this study. Two analytical models found in the technical literature (ABNT Standard and Laurent's equation) and four different methods of numerical simulation (TLM - transmission line method, FEM -finite elements method, PM - potential method, CEEE computing platform) were used to evaluate the phenomenon and estimate the grounding resistance for the 4 meshes of the test field. The numerical results are compared to results obtained in a series of measurement tests which employed megger and two types of surge generators, in order to provide an overall understanding of this problem.","PeriodicalId":296478,"journal":{"name":"2015 International Symposium on Lightning Protection (XIII SIPDA)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134227437","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 : 2015-11-30DOI: 10.1109/SIPDA.2015.7339279
M. Azadifar, F. Rachidi, M. Rubinstein, M. Paolone, V. Rakov, D. Pavanello, S. Metz, C. Romero
We report simultaneous measurements of vertical electric fields and currents associated with positive flashes to the Säntis tower. The fields were measured at a distance of 14.7 km from the tower. All the data correspond to type-2 positive flashes characterized by currents with relatively slow rising portion on which oscillatory pulse trains, inferred to be due to an upward negative stepped leader, are superimposed. Bipolar electric field and current pulses associated with the upward negative stepped leader are examined and analyzed. The widths of the initial and second half cycles are found to be similar. The peak of the initial half cycle is found to be, on average, about twice as high as the peak of the second half cycle. A nearly linear correlation is found between the field peaks and associated current peaks.
{"title":"Characteristics of electric fields of upward negative stepped leaders","authors":"M. Azadifar, F. Rachidi, M. Rubinstein, M. Paolone, V. Rakov, D. Pavanello, S. Metz, C. Romero","doi":"10.1109/SIPDA.2015.7339279","DOIUrl":"https://doi.org/10.1109/SIPDA.2015.7339279","url":null,"abstract":"We report simultaneous measurements of vertical electric fields and currents associated with positive flashes to the Säntis tower. The fields were measured at a distance of 14.7 km from the tower. All the data correspond to type-2 positive flashes characterized by currents with relatively slow rising portion on which oscillatory pulse trains, inferred to be due to an upward negative stepped leader, are superimposed. Bipolar electric field and current pulses associated with the upward negative stepped leader are examined and analyzed. The widths of the initial and second half cycles are found to be similar. The peak of the initial half cycle is found to be, on average, about twice as high as the peak of the second half cycle. A nearly linear correlation is found between the field peaks and associated current peaks.","PeriodicalId":296478,"journal":{"name":"2015 International Symposium on Lightning Protection (XIII SIPDA)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131829677","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 : 2015-11-30DOI: 10.1109/SIPDA.2015.7339334
R. Parizotto, A. Mesquita, R. W. Porto
The ability to evaluate the possibility of a lightning discharge is a important resource in making safety-related decisions, and enables the reduction of losses due to shutdowns in the energy sector, as well as other damages. The atmospheric electric field sensors are used to measure the magnitude of the electric field in a region between the earth and a storm cloud, and estimate how much the value of this field is approaching the threshold for an electric discharge. This paper presents the development of a sensor of electric field type EFM with two sets of 2-pole electrodes to the acquisition of differential current proportional to the electric field over the sensor. The data are sent in wireless way through a set of communication protocols called Zigbee, and are analyzed on an interface. The sensor calibration was performed using two conductive plates separated by a distance of 72.9 cm, by applying a DC voltage there between, producing an electric field theoretically known with normalized uncertainty. The prototype achieved through the method of validation the linearity between voltage on the plates, and the measured electric field with combined uncertainty for values greater than 593 V/m of 0.7% and for next values of 296 V/m of 1.1%, and a maximum expanded uncertainty of 2.2%.
{"title":"Design and calibration of an atmospheric electric field sensor with wireless comunication","authors":"R. Parizotto, A. Mesquita, R. W. Porto","doi":"10.1109/SIPDA.2015.7339334","DOIUrl":"https://doi.org/10.1109/SIPDA.2015.7339334","url":null,"abstract":"The ability to evaluate the possibility of a lightning discharge is a important resource in making safety-related decisions, and enables the reduction of losses due to shutdowns in the energy sector, as well as other damages. The atmospheric electric field sensors are used to measure the magnitude of the electric field in a region between the earth and a storm cloud, and estimate how much the value of this field is approaching the threshold for an electric discharge. This paper presents the development of a sensor of electric field type EFM with two sets of 2-pole electrodes to the acquisition of differential current proportional to the electric field over the sensor. The data are sent in wireless way through a set of communication protocols called Zigbee, and are analyzed on an interface. The sensor calibration was performed using two conductive plates separated by a distance of 72.9 cm, by applying a DC voltage there between, producing an electric field theoretically known with normalized uncertainty. The prototype achieved through the method of validation the linearity between voltage on the plates, and the measured electric field with combined uncertainty for values greater than 593 V/m of 0.7% and for next values of 296 V/m of 1.1%, and a maximum expanded uncertainty of 2.2%.","PeriodicalId":296478,"journal":{"name":"2015 International Symposium on Lightning Protection (XIII SIPDA)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115836645","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 : 2015-11-30DOI: 10.1109/SIPDA.2015.7339281
D. Johari, V. Cooray, P. Hettiarachchi, M. Rahman, M. Ismail
Compared to negative ground flashes, not much is known about the characteristics of leaders in positive ground flashes. This paper presents some characteristics of the electric field pulses observed during leader propagation in positive ground flashes. We analyzed in detail the electric field changes produced by 50 positive ground flashes during 2014 summer thunderstorms in Uppsala, Sweden. Pronounced leader pulses were observed in 22% of the cases. They were observed to occur 1.4 ms or less before the first return stroke. Interpulse duration ranged from 13.3 - 50.3 μs with a mean value of 24.7 μs. The largest relative amplitude ranged from 2.7 - 17.8 % of the return stroke peak. No dependence of the pulses occurrence were observed with distance. However, the relative amplitude were found to decrease with distance. The presence of these pulses suggests that the leaders propagate in a stepped manner. One case of positive ground flashes preceded by negative polarity pulses just before the return stroke is also reported.
{"title":"Some characteristics of leader pulses in positive cloud-to-ground flashes","authors":"D. Johari, V. Cooray, P. Hettiarachchi, M. Rahman, M. Ismail","doi":"10.1109/SIPDA.2015.7339281","DOIUrl":"https://doi.org/10.1109/SIPDA.2015.7339281","url":null,"abstract":"Compared to negative ground flashes, not much is known about the characteristics of leaders in positive ground flashes. This paper presents some characteristics of the electric field pulses observed during leader propagation in positive ground flashes. We analyzed in detail the electric field changes produced by 50 positive ground flashes during 2014 summer thunderstorms in Uppsala, Sweden. Pronounced leader pulses were observed in 22% of the cases. They were observed to occur 1.4 ms or less before the first return stroke. Interpulse duration ranged from 13.3 - 50.3 μs with a mean value of 24.7 μs. The largest relative amplitude ranged from 2.7 - 17.8 % of the return stroke peak. No dependence of the pulses occurrence were observed with distance. However, the relative amplitude were found to decrease with distance. The presence of these pulses suggests that the leaders propagate in a stepped manner. One case of positive ground flashes preceded by negative polarity pulses just before the return stroke is also reported.","PeriodicalId":296478,"journal":{"name":"2015 International Symposium on Lightning Protection (XIII SIPDA)","volume":"34 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116189471","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 : 2015-11-30DOI: 10.1109/SIPDA.2015.7339308
J. Paulino, Wallace Do C. Boaventura, Ivan Jose Da S. Lopes, Celio Fonseca Barbosa
Lightning induced voltages on aerial and underground lines depend on the ground resistivity. Most calculating methodologies were developed considering the ground as a homogeneous medium. However, actual ground is better represented if stratified into horizontal layers of different resistivity values. This paper proposes the use of a simplified expression for the calculation of the equivalent resistivity of a uniform ground that can represent a two-layer stratified ground in lightning induced voltage calculations. The analysis is made by comparing the results from a homogeneous ground having the equivalent resistivity value with results from two-layer ground. It is shown that, for the range of parameters considered, the absolute average and maximum errors on the induced voltage peak values are 2.9% and 8.2%, respectively. It is also shown that, with the equivalent resistivity, a peak-value formula developed for uniform ground could be used for the calculation of lightning induced voltages on lines above two-layer ground.
{"title":"On the use of homogeneous ground model for lightning-induced voltage calculation","authors":"J. Paulino, Wallace Do C. Boaventura, Ivan Jose Da S. Lopes, Celio Fonseca Barbosa","doi":"10.1109/SIPDA.2015.7339308","DOIUrl":"https://doi.org/10.1109/SIPDA.2015.7339308","url":null,"abstract":"Lightning induced voltages on aerial and underground lines depend on the ground resistivity. Most calculating methodologies were developed considering the ground as a homogeneous medium. However, actual ground is better represented if stratified into horizontal layers of different resistivity values. This paper proposes the use of a simplified expression for the calculation of the equivalent resistivity of a uniform ground that can represent a two-layer stratified ground in lightning induced voltage calculations. The analysis is made by comparing the results from a homogeneous ground having the equivalent resistivity value with results from two-layer ground. It is shown that, for the range of parameters considered, the absolute average and maximum errors on the induced voltage peak values are 2.9% and 8.2%, respectively. It is also shown that, with the equivalent resistivity, a peak-value formula developed for uniform ground could be used for the calculation of lightning induced voltages on lines above two-layer ground.","PeriodicalId":296478,"journal":{"name":"2015 International Symposium on Lightning Protection (XIII SIPDA)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132505762","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 : 2015-11-30DOI: 10.1109/SIPDA.2015.7339292
Carson W. I. McAfee, Kerren M. Ortlepp, K. Nixon
Two methods for modeling the electromagnetic fields near a lightning channel are considered. These methods can be used in evaluating the effect of a lightning electromagnetic pulse (LEMP) on a distribution line. The first method for evaluating LEMP fields in the time domain uses a Heidler function approximation for the channel base current in the classic Finite Antenna method. This approximation has an analytical integral solution which simplifies the field calculations. The second method is a combination of standard FDTD theory and the mathematics of the Finite Antenna method. The proposed Single Cell or Hybrid FDTD method is derived for spherical co-ordinates and tested against the Finite Antenna method. The results show that under simple modeling criteria both methods are valid for LEMP calculations near a lightning channel. The Single Cell FDTD method only evaluates a single FDTD cell, rather than an entire plane of cells described by the standard FDTD method. This greatly reduces the computational intensity, and makes the Single Cell FDTD method a valuable tool.
{"title":"Finite Antenna and Single Cell FDTD methods applied to near LEMP calculations","authors":"Carson W. I. McAfee, Kerren M. Ortlepp, K. Nixon","doi":"10.1109/SIPDA.2015.7339292","DOIUrl":"https://doi.org/10.1109/SIPDA.2015.7339292","url":null,"abstract":"Two methods for modeling the electromagnetic fields near a lightning channel are considered. These methods can be used in evaluating the effect of a lightning electromagnetic pulse (LEMP) on a distribution line. The first method for evaluating LEMP fields in the time domain uses a Heidler function approximation for the channel base current in the classic Finite Antenna method. This approximation has an analytical integral solution which simplifies the field calculations. The second method is a combination of standard FDTD theory and the mathematics of the Finite Antenna method. The proposed Single Cell or Hybrid FDTD method is derived for spherical co-ordinates and tested against the Finite Antenna method. The results show that under simple modeling criteria both methods are valid for LEMP calculations near a lightning channel. The Single Cell FDTD method only evaluates a single FDTD cell, rather than an entire plane of cells described by the standard FDTD method. This greatly reduces the computational intensity, and makes the Single Cell FDTD method a valuable tool.","PeriodicalId":296478,"journal":{"name":"2015 International Symposium on Lightning Protection (XIII SIPDA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128721704","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 : 2015-11-30DOI: 10.1109/SIPDA.2015.7339315
Daniel E. Villamil, F. Santamaria, Wilson Diaz
This paper presents a compilation of some of the educational methodologies proposed and implemented to promote and spread the lightning safety message within populations with particular characteristics, reviewing previous documentation from researches whose results and experiences have contributed to reach people with helpful information that can save their lives. Likewise, 10 lightning incidents (9 occurred in Colombia and 1 in Tanzania) are referenced and described including the conditions in which they happened. Then, a discussion is made about the current situation of Colombia in relation to lightning management, comparing the effectiveness of protection systems versus the lack of lightning prevention knowledge among Colombian people. Finally, the structure of the National System of Disaster Risk Management (SNGRD in Spanish) is presented, which is the foundation for the design and execution of lightning safety programs in the country.
{"title":"Lightning Disaster Risk assessment method in Colombia","authors":"Daniel E. Villamil, F. Santamaria, Wilson Diaz","doi":"10.1109/SIPDA.2015.7339315","DOIUrl":"https://doi.org/10.1109/SIPDA.2015.7339315","url":null,"abstract":"This paper presents a compilation of some of the educational methodologies proposed and implemented to promote and spread the lightning safety message within populations with particular characteristics, reviewing previous documentation from researches whose results and experiences have contributed to reach people with helpful information that can save their lives. Likewise, 10 lightning incidents (9 occurred in Colombia and 1 in Tanzania) are referenced and described including the conditions in which they happened. Then, a discussion is made about the current situation of Colombia in relation to lightning management, comparing the effectiveness of protection systems versus the lack of lightning prevention knowledge among Colombian people. Finally, the structure of the National System of Disaster Risk Management (SNGRD in Spanish) is presented, which is the foundation for the design and execution of lightning safety programs in the country.","PeriodicalId":296478,"journal":{"name":"2015 International Symposium on Lightning Protection (XIII SIPDA)","volume":"1067 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113995127","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 : 2015-11-25DOI: 10.1109/SIPDA.2015.7339320
J. A. Alarcón, F. Santamaria, F. Roman
This paper studies the behavior of the corona effect in dry air and coaxial configuration for different pressure values. The study is conducted in a system of four parallel-connected coaxial cylinders placed inside a controlled pressure chamber. During the tests, DC current is measured through the coaxial system for various pressure values when a voltage, higher than the corona onset, is applied; then, a mathematical model that describes the behavior of the corona current as a function of pressure and applied voltage is obtained. The mathematical model accurately reproduces the behavior observed during the measurements.
{"title":"Behavior of the corona current in coaxial systems with negative corona under controlled pressure conditions","authors":"J. A. Alarcón, F. Santamaria, F. Roman","doi":"10.1109/SIPDA.2015.7339320","DOIUrl":"https://doi.org/10.1109/SIPDA.2015.7339320","url":null,"abstract":"This paper studies the behavior of the corona effect in dry air and coaxial configuration for different pressure values. The study is conducted in a system of four parallel-connected coaxial cylinders placed inside a controlled pressure chamber. During the tests, DC current is measured through the coaxial system for various pressure values when a voltage, higher than the corona onset, is applied; then, a mathematical model that describes the behavior of the corona current as a function of pressure and applied voltage is obtained. The mathematical model accurately reproduces the behavior observed during the measurements.","PeriodicalId":296478,"journal":{"name":"2015 International Symposium on Lightning Protection (XIII SIPDA)","volume":"29 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131977243","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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