Pub Date : 2023-06-12DOI: 10.1109/APL57308.2023.10181342
Kei Miyamoto, Kazuki Oobayashi, J. Suzuki, Kazuo Yamamoto, H. Kogo, Tomoya Tsuchida
In Japan, there is a characteristic lightning called thundersnow. Although there is a technical standard for installing a lightning stop device in this thundersnow area, there has been no clear standard for a lightning strike detection system for wind turbine. From this, the specifications and JIS 1400-24 for lightning strike detection system adapted to thundersnow in Japan were created. A test method for a lightning strike detection system that satisfies these specifications was investigated.
{"title":"Performance Evaluations of Lightning Detection System for Wind Turbine","authors":"Kei Miyamoto, Kazuki Oobayashi, J. Suzuki, Kazuo Yamamoto, H. Kogo, Tomoya Tsuchida","doi":"10.1109/APL57308.2023.10181342","DOIUrl":"https://doi.org/10.1109/APL57308.2023.10181342","url":null,"abstract":"In Japan, there is a characteristic lightning called thundersnow. Although there is a technical standard for installing a lightning stop device in this thundersnow area, there has been no clear standard for a lightning strike detection system for wind turbine. From this, the specifications and JIS 1400-24 for lightning strike detection system adapted to thundersnow in Japan were created. A test method for a lightning strike detection system that satisfies these specifications was investigated.","PeriodicalId":371726,"journal":{"name":"2023 12th Asia-Pacific International Conference on Lightning (APL)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133195053","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 : 2023-06-12DOI: 10.1109/APL57308.2023.10181327
Okuda Takashi, Tsukamoto Naoyuki
For surge protections, various nonlinear components are used at stand alone or in combination. In order to understand the possibility of volume or area minimization for assembly using surge protection components, the surge withstand performance in a parallel circuit consisting of both an MOV and a GDT having lower rating is investigated. As results, even if the operation coordination in parallel combination of MOV and GDT is achieved for the first impulse application, for excessive and repetitive impulse currents, the GDT d.c. sperkover voltage (V s) drastically increased and the energy the MOV absorbed also increased. On the other hand, it was confirmed that a parallel combination of MOV and GDT could withstand current values twice the rated MOV’s specification. As conclusions of this study, it is found that the combination of MOV and GDT greatly affects the performance in surge protection.
{"title":"Withstand capability of MOV and GDT parallel combination for excessive impulse currents","authors":"Okuda Takashi, Tsukamoto Naoyuki","doi":"10.1109/APL57308.2023.10181327","DOIUrl":"https://doi.org/10.1109/APL57308.2023.10181327","url":null,"abstract":"For surge protections, various nonlinear components are used at stand alone or in combination. In order to understand the possibility of volume or area minimization for assembly using surge protection components, the surge withstand performance in a parallel circuit consisting of both an MOV and a GDT having lower rating is investigated. As results, even if the operation coordination in parallel combination of MOV and GDT is achieved for the first impulse application, for excessive and repetitive impulse currents, the GDT d.c. sperkover voltage (V s) drastically increased and the energy the MOV absorbed also increased. On the other hand, it was confirmed that a parallel combination of MOV and GDT could withstand current values twice the rated MOV’s specification. As conclusions of this study, it is found that the combination of MOV and GDT greatly affects the performance in surge protection.","PeriodicalId":371726,"journal":{"name":"2023 12th Asia-Pacific International Conference on Lightning (APL)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124891489","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 : 2023-06-12DOI: 10.1109/APL57308.2023.10181461
Chung Yoke Wai, N. S. Hudi, Muhammad Shahmi Shokri, Ir. Noradlina Abdullah
A fault on overhead power lines can cause significant damage to the lines, resulting in outages and other disruptions. Detecting and diagnosing faults promptly is critical to minimize downtime and reduce the costs associated with repairs and maintenance on the transmission line assets. In this paper, we present a web-based automated fault analysis tool known as Automated Fault Analysis (AFA) jointly developed by Tenaga Nasional Berhad (TNB) Grid Division and TNB Research Center (TNBR). This system can automatically provide (1) fast and accurate fault location to assist in equipment restoration, (2) lightning and fault correlation analysis, and (3) relay and circuit breaker performance monitoring. The AFA automatic online analysis is made possible with intranet connection to digital fault recorders and digital protective relays utilizing substation RTAP gateway and TNB-owned fiber-optic network. For fault information enrichment, a Lightning Detection System, a Geographical Information System and CAPE™ Line Parameter Data were digitally integrated and are synchronized with GPS-system. AFA has been serving TNB-Grid for almost 2 years and the results are very encouraging with accurate fault location estimation and lightning and fault correlation analysis. This paper describes AFA lighting analysis module with practical engineer’s solution in mind and in-line with asset performance management system. Results of the current development and some near future enhancement including artificial intelligence using this fault analytic platform are shared
{"title":"Lightning and Overhead Line Fault Analysis using Automated Fault Analysis Application On Transmission Line in Grid Division, TNB Malaysia","authors":"Chung Yoke Wai, N. S. Hudi, Muhammad Shahmi Shokri, Ir. Noradlina Abdullah","doi":"10.1109/APL57308.2023.10181461","DOIUrl":"https://doi.org/10.1109/APL57308.2023.10181461","url":null,"abstract":"A fault on overhead power lines can cause significant damage to the lines, resulting in outages and other disruptions. Detecting and diagnosing faults promptly is critical to minimize downtime and reduce the costs associated with repairs and maintenance on the transmission line assets. In this paper, we present a web-based automated fault analysis tool known as Automated Fault Analysis (AFA) jointly developed by Tenaga Nasional Berhad (TNB) Grid Division and TNB Research Center (TNBR). This system can automatically provide (1) fast and accurate fault location to assist in equipment restoration, (2) lightning and fault correlation analysis, and (3) relay and circuit breaker performance monitoring. The AFA automatic online analysis is made possible with intranet connection to digital fault recorders and digital protective relays utilizing substation RTAP gateway and TNB-owned fiber-optic network. For fault information enrichment, a Lightning Detection System, a Geographical Information System and CAPE™ Line Parameter Data were digitally integrated and are synchronized with GPS-system. AFA has been serving TNB-Grid for almost 2 years and the results are very encouraging with accurate fault location estimation and lightning and fault correlation analysis. This paper describes AFA lighting analysis module with practical engineer’s solution in mind and in-line with asset performance management system. Results of the current development and some near future enhancement including artificial intelligence using this fault analytic platform are shared","PeriodicalId":371726,"journal":{"name":"2023 12th Asia-Pacific International Conference on Lightning (APL)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124976503","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 : 2023-06-12DOI: 10.1109/APL57308.2023.10181741
W. F. Wan Ahmad, A. H. Abdul Rahman, J. Jasni, M. Ab-Kadir
Grounding system is one of the lightning protection system that meant to provide protection for a power system, equipment in it and any personnel whom might accidently in touch with it, during both normal and fault conditions. It must with a low impedance path, ensuring all fault currents to be dispersed into earth at the shortest time possible. This could be achieved by treating grounding enhancement materials with the surrounding soil to reduce its earth resistance effectively. Grounding enhancement materials could be natural or chemical based, i.e. CEM and NEM, respectively. Only NEMs were considered in this study where four grounding systems were installed near to SGS, UPM with 100% Bentonite, 100% Peat Moss, Bentonite and Peat Moss Mix A, and Bentonite and Peat Moss Mix B. These NEM were mixed with water for their performances were compared to a Reference grounding system which is without any NEM added to the vicinity of the ground conductor. The performances of all installed grounding systems were evaluated by the percentage reductions of their measured earth resistance values against the Reference grounding system, with Fall-of-potential method, 62% rule and 0o separation angle were employed. The earth resistances were measured daily for 120 days, i.e. from 1st Feb 2019 to 1st Jun 2019 and it has been found that the best performed grounding system in descending order were 100% Bentonite, Bentonite and Peat Moss Mix A, 100% Peat Moss, Bentonite and Peat Moss Mix B, and Reference grounding systems. Note that Bentonite ratio was more in Mix A compared to Mix B.
{"title":"Performance of Bentonite and Peat Moss Mixtures as Grounding Enhancement Materials","authors":"W. F. Wan Ahmad, A. H. Abdul Rahman, J. Jasni, M. Ab-Kadir","doi":"10.1109/APL57308.2023.10181741","DOIUrl":"https://doi.org/10.1109/APL57308.2023.10181741","url":null,"abstract":"Grounding system is one of the lightning protection system that meant to provide protection for a power system, equipment in it and any personnel whom might accidently in touch with it, during both normal and fault conditions. It must with a low impedance path, ensuring all fault currents to be dispersed into earth at the shortest time possible. This could be achieved by treating grounding enhancement materials with the surrounding soil to reduce its earth resistance effectively. Grounding enhancement materials could be natural or chemical based, i.e. CEM and NEM, respectively. Only NEMs were considered in this study where four grounding systems were installed near to SGS, UPM with 100% Bentonite, 100% Peat Moss, Bentonite and Peat Moss Mix A, and Bentonite and Peat Moss Mix B. These NEM were mixed with water for their performances were compared to a Reference grounding system which is without any NEM added to the vicinity of the ground conductor. The performances of all installed grounding systems were evaluated by the percentage reductions of their measured earth resistance values against the Reference grounding system, with Fall-of-potential method, 62% rule and 0o separation angle were employed. The earth resistances were measured daily for 120 days, i.e. from 1st Feb 2019 to 1st Jun 2019 and it has been found that the best performed grounding system in descending order were 100% Bentonite, Bentonite and Peat Moss Mix A, 100% Peat Moss, Bentonite and Peat Moss Mix B, and Reference grounding systems. Note that Bentonite ratio was more in Mix A compared to Mix B.","PeriodicalId":371726,"journal":{"name":"2023 12th Asia-Pacific International Conference on Lightning (APL)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114834697","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 : 2023-06-12DOI: 10.1109/APL57308.2023.10181467
K. Michishita, Koji Takano, Takao Kawazoe, M. Ikuta, S. Yokoyama
For the rational lightning protection design of power distribution lines lightning current is measured at the Muregaoka wind farm since 2007. As of March 2022, 25 current waveforms associated with lightning discharge are obtained. In this paper, infrequent examples of the recorded lightning current waveforms are reported as well as the summary of the observed results.
{"title":"Observation of Lightning Discharge Current in Kyushu in Japan","authors":"K. Michishita, Koji Takano, Takao Kawazoe, M. Ikuta, S. Yokoyama","doi":"10.1109/APL57308.2023.10181467","DOIUrl":"https://doi.org/10.1109/APL57308.2023.10181467","url":null,"abstract":"For the rational lightning protection design of power distribution lines lightning current is measured at the Muregaoka wind farm since 2007. As of March 2022, 25 current waveforms associated with lightning discharge are obtained. In this paper, infrequent examples of the recorded lightning current waveforms are reported as well as the summary of the observed results.","PeriodicalId":371726,"journal":{"name":"2023 12th Asia-Pacific International Conference on Lightning (APL)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125324088","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 : 2023-06-12DOI: 10.1109/APL57308.2023.10182046
Shirley Anak Rufus, N. A. Ahmad, Z. Abdul-Malek, N. Abdullah
Thunderstorms are one of the most destructive phenomena worldwide and are primarily associated with lightning and heavy rain that cause human fatalities, urban floods, and crop damage. Therefore, predicting thunderstorms with reasonable accuracy is one of the crucial requirements for the planning and management of many applications, including agriculture, flood control, and air traffic control. This study extensively applied the historical lightning and meteorological data from 2011 to 2018 of the southern regions of Peninsular Malaysia to predict thunderstorm occurrence. Positive CG lightning rarely occurs compared to negative CG lightning and also due to the non-linear and complex characteristics of the thunderstorm and lightning itself, leading to an imbalance in the dataset. The resampling technique called SMOTE is introduced to overcome the imbalance of the training dataset. Then the dataset is trained and tested with five Machine Learning (ML) algorithms, including Decision Trees (DT), Adaptive Boosting (AdaBoost), Random Forest (RF), Extra Trees (ET), and Gradient Boosting (GB). The results have shown a good prediction with accuracy (74% to 95%), recall (72% to 93%), precision (76% to 97%), and F1-Score (74% to 95%) with SMOTE. The SMOTE and GB model prediction model is the best algorithm for thunderstorm prediction for this region in terms of performance metrics. In the future, the prediction results based on the lightning pattern and weather dataset will likely alert the related authorities to make an early strategy to handle the occurrence of thunderstorms.
{"title":"Thunderstorm Prediction Model Using SMOTE Sampling and Machine Learning Approach","authors":"Shirley Anak Rufus, N. A. Ahmad, Z. Abdul-Malek, N. Abdullah","doi":"10.1109/APL57308.2023.10182046","DOIUrl":"https://doi.org/10.1109/APL57308.2023.10182046","url":null,"abstract":"Thunderstorms are one of the most destructive phenomena worldwide and are primarily associated with lightning and heavy rain that cause human fatalities, urban floods, and crop damage. Therefore, predicting thunderstorms with reasonable accuracy is one of the crucial requirements for the planning and management of many applications, including agriculture, flood control, and air traffic control. This study extensively applied the historical lightning and meteorological data from 2011 to 2018 of the southern regions of Peninsular Malaysia to predict thunderstorm occurrence. Positive CG lightning rarely occurs compared to negative CG lightning and also due to the non-linear and complex characteristics of the thunderstorm and lightning itself, leading to an imbalance in the dataset. The resampling technique called SMOTE is introduced to overcome the imbalance of the training dataset. Then the dataset is trained and tested with five Machine Learning (ML) algorithms, including Decision Trees (DT), Adaptive Boosting (AdaBoost), Random Forest (RF), Extra Trees (ET), and Gradient Boosting (GB). The results have shown a good prediction with accuracy (74% to 95%), recall (72% to 93%), precision (76% to 97%), and F1-Score (74% to 95%) with SMOTE. The SMOTE and GB model prediction model is the best algorithm for thunderstorm prediction for this region in terms of performance metrics. In the future, the prediction results based on the lightning pattern and weather dataset will likely alert the related authorities to make an early strategy to handle the occurrence of thunderstorms.","PeriodicalId":371726,"journal":{"name":"2023 12th Asia-Pacific International Conference on Lightning (APL)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114891907","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 : 2023-06-12DOI: 10.1109/APL57308.2023.10181495
Xiankang Wang, Xiaopeng Liu, Zijian Li, Yao Yao, Junjia He
A long-standing but fundamental question in lightning and laboratory spark researches is how the positive and negative leader attach with each other. Here we report optical images and discharge current waveforms during the breakthrough phase of attachment process in positive laboratory sparks. The space leader inside the common streamer zone was observed for the first time. The recorded electric current as well as the calculated impedance of the common streamer zone reveal the evolution process of the space leader. Finally, a new scenario including three subsequent stages is proposed for leaders’ attachment process.
{"title":"Observation of the Space Leader During the Attachment Process in Positive Laboratory Sparks","authors":"Xiankang Wang, Xiaopeng Liu, Zijian Li, Yao Yao, Junjia He","doi":"10.1109/APL57308.2023.10181495","DOIUrl":"https://doi.org/10.1109/APL57308.2023.10181495","url":null,"abstract":"A long-standing but fundamental question in lightning and laboratory spark researches is how the positive and negative leader attach with each other. Here we report optical images and discharge current waveforms during the breakthrough phase of attachment process in positive laboratory sparks. The space leader inside the common streamer zone was observed for the first time. The recorded electric current as well as the calculated impedance of the common streamer zone reveal the evolution process of the space leader. Finally, a new scenario including three subsequent stages is proposed for leaders’ attachment process.","PeriodicalId":371726,"journal":{"name":"2023 12th Asia-Pacific International Conference on Lightning (APL)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125833660","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 : 2023-06-12DOI: 10.1109/APL57308.2023.10182045
Pradip Karki, Shriram Sharma, K. Poudyal, M. Gyawali, Sujan Neupane
This study attempts to obtain the correlation between lightning activities and aerosol optical depth over the Himalayan and lesser Himalayan region. To investigate the association between Aerosol Optical Depth (AOD) with Lightning Stroke Density (LSD), the lightning stroke data were obtained from Vaisala’s Global Lightning Detection Network (GLD 360), and Aerosol Optical Depth (AOD) data were obtained from the Moderate Resolution Imaging Spectrometer (MODIS) Aqua satellites acquired between 2015 and 2020. We divided the geography of Nepal into three sections namely, Eastern (region 1), Central (region 2), and Western (region 3). It is observed that lightning is strongly and positively correlated with AOD loading, up to AOD ~ 0.75 for the eastern region; up to AOD ~ 0.70 for the middle region; and up to ~ 0.55 and for the western region; above these values the correlation weakens. Region 2 exhibits a much weak linear correlation (R=0.628) as compared to the other two regions (R=0.855 for region 1 and R=0.832 for region 3). The results indicate that moist aerosols have a better correlation to greater optical depth as compared to the drier aerosols over the Himalayan region. Lightning activity is strongly correlated with AOD for lower values but there is a negative correlation for the higher values of AOD.
{"title":"Effects of Aerosols on lightning activity over the Himalayan Region","authors":"Pradip Karki, Shriram Sharma, K. Poudyal, M. Gyawali, Sujan Neupane","doi":"10.1109/APL57308.2023.10182045","DOIUrl":"https://doi.org/10.1109/APL57308.2023.10182045","url":null,"abstract":"This study attempts to obtain the correlation between lightning activities and aerosol optical depth over the Himalayan and lesser Himalayan region. To investigate the association between Aerosol Optical Depth (AOD) with Lightning Stroke Density (LSD), the lightning stroke data were obtained from Vaisala’s Global Lightning Detection Network (GLD 360), and Aerosol Optical Depth (AOD) data were obtained from the Moderate Resolution Imaging Spectrometer (MODIS) Aqua satellites acquired between 2015 and 2020. We divided the geography of Nepal into three sections namely, Eastern (region 1), Central (region 2), and Western (region 3). It is observed that lightning is strongly and positively correlated with AOD loading, up to AOD ~ 0.75 for the eastern region; up to AOD ~ 0.70 for the middle region; and up to ~ 0.55 and for the western region; above these values the correlation weakens. Region 2 exhibits a much weak linear correlation (R=0.628) as compared to the other two regions (R=0.855 for region 1 and R=0.832 for region 3). The results indicate that moist aerosols have a better correlation to greater optical depth as compared to the drier aerosols over the Himalayan region. Lightning activity is strongly correlated with AOD for lower values but there is a negative correlation for the higher values of AOD.","PeriodicalId":371726,"journal":{"name":"2023 12th Asia-Pacific International Conference on Lightning (APL)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134434480","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 : 2023-06-12DOI: 10.1109/APL57308.2023.10181545
Rupam Pal, U. Kumar
The return-stroke field is one of the severest sources of natural EMI for electrical systems. The return-stroke field affects not only the electrical systems on the ground but also a flying aircraft or a device buried in the soil. Therefore, it becomes necessary to characterize the field. Measurement of return-stroke stroke field is a complicated and expensive exercise, and therefore, researchers often opt for theoretical modeling. In most investigations available in the literature, the field observations are restricted to a few meters above the ground, so the overall field structure in the air is not available. In this work, the spatio-temporal variation of the overall field structure (up to 1 km above the ground) close to the channel (< 1000 m) is investigated with a suitable return-stroke model in the presence of finitely conducting soil for flat ground and a mountain-like structure. A similar endeavor is hard to find in the literature and is expected to provide a valuable understanding of the field close to the channel. As most electrical and electronic devices are placed very close to the air-soil interface, a detailed analysis of the temporal variation of the field in the air close to the ground for different radial distances will also be presented.
{"title":"Return-Stroke Field Close to the Channel with Finitely Conducting Earth","authors":"Rupam Pal, U. Kumar","doi":"10.1109/APL57308.2023.10181545","DOIUrl":"https://doi.org/10.1109/APL57308.2023.10181545","url":null,"abstract":"The return-stroke field is one of the severest sources of natural EMI for electrical systems. The return-stroke field affects not only the electrical systems on the ground but also a flying aircraft or a device buried in the soil. Therefore, it becomes necessary to characterize the field. Measurement of return-stroke stroke field is a complicated and expensive exercise, and therefore, researchers often opt for theoretical modeling. In most investigations available in the literature, the field observations are restricted to a few meters above the ground, so the overall field structure in the air is not available. In this work, the spatio-temporal variation of the overall field structure (up to 1 km above the ground) close to the channel (< 1000 m) is investigated with a suitable return-stroke model in the presence of finitely conducting soil for flat ground and a mountain-like structure. A similar endeavor is hard to find in the literature and is expected to provide a valuable understanding of the field close to the channel. As most electrical and electronic devices are placed very close to the air-soil interface, a detailed analysis of the temporal variation of the field in the air close to the ground for different radial distances will also be presented.","PeriodicalId":371726,"journal":{"name":"2023 12th Asia-Pacific International Conference on Lightning (APL)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133482707","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 : 2023-06-12DOI: 10.1109/APL57308.2023.10181334
H. Honda, Takafumi Kuno, Yoshiyasu Koga
Lightning has been the leading cause of power outage, therefore, there is a need for further reduction of outage caused by lightning. In this paper, authors are considering the application of resin arms, which can be a new menu for countermeasures of outage caused lightning. Since the resin arm has a different path length of ground fault path of the three-phase distribution wire, by appropriately arranging the phases that are prone to ground faults by changing the arrangement, it can be a rational countermeasure against power outage caused by lightning that allows up to one phase ground faults. Authors measured the creepage breakdown voltage of the prototype resin plate and verified the reduction of power outage caused by lightning by analysis.
{"title":"A Study of Power Outage Reduction Due to Lightning by Using the Different Dielectric Strength of Supporting Points of Distribution Lines","authors":"H. Honda, Takafumi Kuno, Yoshiyasu Koga","doi":"10.1109/APL57308.2023.10181334","DOIUrl":"https://doi.org/10.1109/APL57308.2023.10181334","url":null,"abstract":"Lightning has been the leading cause of power outage, therefore, there is a need for further reduction of outage caused by lightning. In this paper, authors are considering the application of resin arms, which can be a new menu for countermeasures of outage caused lightning. Since the resin arm has a different path length of ground fault path of the three-phase distribution wire, by appropriately arranging the phases that are prone to ground faults by changing the arrangement, it can be a rational countermeasure against power outage caused by lightning that allows up to one phase ground faults. Authors measured the creepage breakdown voltage of the prototype resin plate and verified the reduction of power outage caused by lightning by analysis.","PeriodicalId":371726,"journal":{"name":"2023 12th Asia-Pacific International Conference on Lightning (APL)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125177170","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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