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Map SPD clamping voltages on to spectral clusters generated by Wavelet transformation 将SPD箝位电压映射到小波变换生成的谱簇上
中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627383
N. Sapumanage, S. Nanayakkara, S. Abegunawardana, M. Fernando, V. Cooray
{"title":"Map SPD clamping voltages on to spectral clusters generated by Wavelet transformation","authors":"N. Sapumanage, S. Nanayakkara, S. Abegunawardana, M. Fernando, V. Cooray","doi":"10.1109/ICLPandSIPDA54065.2021.9627383","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627383","url":null,"abstract":"This study employed wavelet transformation to disclose the spectrograms of IEC standard impulses and real transient voltages generated by the cloud to ground discharges. The spectral details of each impulse were subdivided into different spectral clusters and the outcome was mapped into respective voltage levels and time to develop correlations. Eventually different protection voltage levels of commercially available surge protection devices (SPDs) and the voltage levels of different spectral clusters were compared to determine whether harmful energy infringements could be possible when the spectral clusters are wrapped by SPDs. This study revealed that all IEC impulses have identical spectral clusters whereas real transient voltages demonstrated that they are inherited with much random spectral distributions. Thus, planning for foolproof through benchmarking real transient impulses against IEC impulses would not produce guaranteed outcomes. Hence, a poor selection of clamping voltages may create a permanent window to infringing a small quantum of harmful energy on a constant basis into sensitive systems to trigger silent killing of basic functional units.","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":"76924943","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}
引用次数: 0
Lightning performance and formula description of a Y-shaped composite pylon considering the effect of tower-footing impedance 考虑塔基阻抗影响的y形复合塔防雷性能及公式描述
中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627494
K. Yin, M. Ghomi, F. D. da Silva, C. Bak, Hanchi Zhang, Qian Wang, H. Skouboe
{"title":"Lightning performance and formula description of a Y-shaped composite pylon considering the effect of tower-footing impedance","authors":"K. Yin, M. Ghomi, F. D. da Silva, C. Bak, Hanchi Zhang, Qian Wang, H. Skouboe","doi":"10.1109/ICLPandSIPDA54065.2021.9627494","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627494","url":null,"abstract":"This paper presents systematic research on the lightning performance of a novel Y-shaped composite pylon for 400 kV transmission lines and the feasibility of empirical formulas for this kind of tower when considering the effect of tower-footing impedance. The transient overvoltage response to a lightning surge at the tip of the pylon is modeled in PSCAD/EMTDC. Compared with the Donau tower, the composite pylon shows a similar backflash rate (BFR) level. Then, we use qualitative analysis based on lumped parameter model and distributed parameter model to predict the critical flashover current (IC) of the composite pylon. We find that the calculated results exhibit higher error deflection when the existing empirical formulas are applied in the Y-shaped pylon. Furthermore, the simulated lightning performance has a lower sensitivity to varied tower-footing impedance compared with empirical formula calculation. The special structure of the Y-shaped pylon, the discontinuity in surge impedance and the soil ionization are analyzed to account for the role of tower-footing impedance on lightning performance. Finally, we improve the accuracy of the empirical formulas to the Y-shaped pylon lightning performance and discuss the effect of the footing impedance on the BFR.","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":"88923114","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}
引用次数: 0
Lightning-induced Overvoltage of 10 kV Distribution Line Based on Electromagnetic Return -stroke Model Using FDTD 基于FDTD电磁回行程模型的10kv配电线路雷击过电压分析
中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627490
Jian Sun, Qing Yang, W. Xu, Zhong Qin, Ke Wang
{"title":"Lightning-induced Overvoltage of 10 kV Distribution Line Based on Electromagnetic Return -stroke Model Using FDTD","authors":"Jian Sun, Qing Yang, W. Xu, Zhong Qin, Ke Wang","doi":"10.1109/ICLPandSIPDA54065.2021.9627490","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627490","url":null,"abstract":"Generally, lightning-induced overvoltage is a cause of most lightning trip accidents. In this paper, 3-D FDTD numerical method is used. The full-wave analysis solution of the electromagnetic field is obtained by selecting the electromagnetic return stroke model of the lightning channel, and the lightning-induced overvoltage of the distribution line is calculated directly. The influences of both the ground conductivity and the distance between the distribution line and the lightning strike point on the propagation characteristics of lightning-induced overvoltage are analyzed. The conclusion shows that when lightning strikes the lossy (a=0.01 S/m) and ideal ground (a=oo), the changing trend of lightning-induced overvoltage at the middle point of the line is similar, but the former has a higher amplitude of lightning-induced overvoltage. The maximum value of the overvoltage presents a second-order exponential decay trend with the distance.","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":"91181771","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}
引用次数: 3
Very High Frequency and Microwave Radiation Associated with Initial Breakdown Process in CG Lightning Flashes from Tropical Storms 与热带风暴CG闪电初始击穿过程相关的甚高频和微波辐射
中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627445
Muhammad Haziq Mohammad Sabri, Ammar Al-Kahtani, N. H. Nik Ali, Mohd Zainal Abidin Ab-Kadir, M. Ahmad, Shamsul Ammar Shamsul Baharin, Taha Raad Al-Shaikhli, Malik Hasan Ahmed, Mona Riza Mohd Esa, V. Cooray, Muhammad Abu Bakar Sidik
{"title":"Very High Frequency and Microwave Radiation Associated with Initial Breakdown Process in CG Lightning Flashes from Tropical Storms","authors":"Muhammad Haziq Mohammad Sabri, Ammar Al-Kahtani, N. H. Nik Ali, Mohd Zainal Abidin Ab-Kadir, M. Ahmad, Shamsul Ammar Shamsul Baharin, Taha Raad Al-Shaikhli, Malik Hasan Ahmed, Mona Riza Mohd Esa, V. Cooray, Muhammad Abu Bakar Sidik","doi":"10.1109/ICLPandSIPDA54065.2021.9627445","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627445","url":null,"abstract":"We present the observation of VHF and microwave radiation pulses associated with initial breakdown process of five negative cloud-to-ground (-CG) flashes from two tropical storms. The -CG flashes were detected within and beyond reversal distances with the locations of the first return stroke were less than 10 km. Out of five flashes, only one detected with initial electric field change (IEC) process. Both VHF and microwave pulses were detected before the first classic IB pulse and the first microwave pulses were found to lead the first VHF pulses ranging between 0.03 and 23.9 μS.","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":"88801851","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}
引用次数: 0
Simulation of indirect effects caused by lightning strikes in aeronautical structures 航空结构中雷击造成的间接影响的模拟
中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627492
R. Callegari, J. Pissolato Filho, Ricardo A. de Araujo
{"title":"Simulation of indirect effects caused by lightning strikes in aeronautical structures","authors":"R. Callegari, J. Pissolato Filho, Ricardo A. de Araujo","doi":"10.1109/ICLPandSIPDA54065.2021.9627492","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627492","url":null,"abstract":"Carbon fiber composites (CFC) are being widely used in the aircraft industry due to their excellent properties. Its low weight, better resistance to corrosion and fatigue, are one of the advantages compared to metals such as aluminum. With the increasing use of CFC in aircraft, studies on the effects of lightning strikes on these materials are extremely important. The study of the indirect effects caused by an atmospheric discharge concerns the effects of the current conduction through the fuselage of an aircraft. In this study, lightning strikes are simulated when applied to the CFC and the indirect effects caused by the conduction of the current are analyzed.","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":"81662943","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}
引用次数: 1
Experimental Characterization of Reinforced Concrete Cable Ducts 钢筋混凝土电缆管道的试验特性
中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627498
Susana Naranjo Villamil, Eric Piedallu, J. Gazave, C. Guiffaut, A. Reineix
{"title":"Experimental Characterization of Reinforced Concrete Cable Ducts","authors":"Susana Naranjo Villamil, Eric Piedallu, J. Gazave, C. Guiffaut, A. Reineix","doi":"10.1109/ICLPandSIPDA54065.2021.9627498","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627498","url":null,"abstract":"When a building is struck by lightning in an industrial facility, a partial lightning current can flow through the reinforcement of cable ducts, causing interference to the cables routing inside. The distribution of the lightning current among the paths leading away from the building depends on their impedance. In this paper, we present the impedance measured in two different cable ducts: one duct with a wire-tied reinforcement and the other with a welded reinforcement. The measurements are compared to the results of numerical simulations carried out using the FDTD method.","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":"88018778","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}
引用次数: 0
Frequency Dependence of Multilayer Soil Electrical Parameters: Effects on Ground Potential Rise 多层土壤电参数的频率依赖性:对地电位上升的影响
中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627403
M. Ghomi, C. Bak, F. D. da Silva
{"title":"Frequency Dependence of Multilayer Soil Electrical Parameters: Effects on Ground Potential Rise","authors":"M. Ghomi, C. Bak, F. D. da Silva","doi":"10.1109/ICLPandSIPDA54065.2021.9627403","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627403","url":null,"abstract":"The paper presents a comprehensive study on the effect of frequency dependence of multilayer soil electrical parameters (SEPs) on ground potential rise (GPR). The lightning current has a large effect on the GPR. Typical analysis has often been based on quasistatic approximation that disregards the exact model of the grounding systems in the transient analysis of electrical networks, input impedance and GPR. To compute GPR in this paper, the full-wave approach based on the MoM solution to Maxwell equations is employed. To model the transient behavior of grounding systems, this method uses minimal approximations to find out GPR. The frequency dependence of SEPs combined with a multilayer soil are two complex issues that are modeled together. In the analysis of the GPR, special attention is given to the influences emanating from the soil multilayer structure and frequency dependency of SEPs. The GPR is calculated for three different soil configuration namely: 1) single layer, 2) two layer and 3) multilayer. From the simulations, the peak value of the GPR reduces when the frequency dependence of SEPs are taken into account. It is shown that considering the frequency dependent of multilayer SEPs can affect on the input impedance of grounding systems and GPR calculations.","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":"85587819","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}
引用次数: 2
Protection Measures against Wire Breaking due to Lightning on Overhead Power Distribution Lines 架空配电线路雷电致断线保护措施
中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627462
S. Yokoyama, Tomoyuki Sato
{"title":"Protection Measures against Wire Breaking due to Lightning on Overhead Power Distribution Lines","authors":"S. Yokoyama, Tomoyuki Sato","doi":"10.1109/ICLPandSIPDA54065.2021.9627462","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627462","url":null,"abstract":"A wire breakage accident of overhead power distribution lines (OPDL) has a great impact on the reliability of power supply and public safety. As the wire of an OPDL has been changed from a bare wire to an insulated (covered) wire, the number of wire breakage accidents increases rapidly. Regarding the wire breakage of insulated wires, the authors explain the mechanism of the OPDL wire breakage accident and evaluate the countermeasures used in Japan. Insulated wires are more susceptible to wire breakage accidents than bare wires. Also, when a lightning strike occurs on a support pole of a distribution line, a wire breakage accident is most likely to occur. In rare cases, the wire breaks in the middle between two poles. Its cause is mostly a side flash from a tree. In Japan, various methods such as improved electric wires, special arcing horns, and arcing horns with zinc oxide elements have been applied as measures against wire breaking, and certain effects have been confirmed.","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":"85665735","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}
引用次数: 1
Tropical Lightning Damage on Various Commercial Aircraft Shapes and Sizes 热带闪电对各种形状和尺寸商用飞机的损害
中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627371
Wisnu Adyatma, Bryan Denov, S. Hidayat, R. Zoro
{"title":"Tropical Lightning Damage on Various Commercial Aircraft Shapes and Sizes","authors":"Wisnu Adyatma, Bryan Denov, S. Hidayat, R. Zoro","doi":"10.1109/ICLPandSIPDA54065.2021.9627371","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627371","url":null,"abstract":"Air transportation is fast, connecting one island to another in Indonesia. Due to tropical lightning strike in Indonesia, commercial aircraft can be damaged, even result in fatal accident. This research aims to evaluate the threat and damage to various types of aircraft due to tropical lightning strikes. By analyzing the tropical lightning characteristic, it can be concluded that the characteristics of tropical lightning will increase the flight disturbance. Aside from that, the shape and size of the aircraft affect the risk of an aircraft being struck by lightning. Winglets on aircraft will increase the risk of lightning strikes on the wings. The bigger the plane, the greater the chance of the nose getting hit. On the other hand, the smaller the aircraft, the greater the chance that the body, tail, wings, engine, and HF Transceiver will be damaged by a lightning strike. Lastly, the bigger the plane, the safer it is against the threat of tropical lightning strikes.","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":"82666711","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}
引用次数: 0
GeoRayos Web and App. Lightning protection in Argentina to Increase Awareness 在阿根廷提高防雷意识
中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627417
M. G. Nicora, D. Baissac, M. Falcó, M. F. Barle, Raul Delia, C. Villagran
{"title":"GeoRayos Web and App. Lightning protection in Argentina to Increase Awareness","authors":"M. G. Nicora, D. Baissac, M. Falcó, M. F. Barle, Raul Delia, C. Villagran","doi":"10.1109/ICLPandSIPDA54065.2021.9627417","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627417","url":null,"abstract":"It has been demonstrated that the way to change behaviours and misconceptions about concepts, in this case lightning protection, requires continuity over time and interdisciplinary work. The GeoRayos Project was born more than 6 years ago trying to provide a tool both in the operational part of the meteorological alerts, as well as in the protection of people. In this context we present the evolution of GeoRayos, which shows the importance of the synergy between different institutions in order to carry out our objectives. This new version has a differentiated structure for the general public and for decision-makers, with the addition of information on protection and social networks. Nowadays, GeoRayos is currently used by decision makers from various institutions such as Civil Defense, National Fire Management Service, and National Parks, as well as meteorologists from the Argentine National Meteorological Service.","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":"80716436","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}
引用次数: 0
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