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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":"19 1","pages":"01-08"},"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":"38 1","pages":"1-6"},"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":"17 1","pages":"1-6"},"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
Prompt calculation of tower-footing impulse impedance considering different levels of conservativeness for the frequency dependence of soil parameters 考虑土参数频率依赖性的不同保守度，及时计算塔基冲击阻抗
中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627427
R. Alípio, M. Guimarães, Naiara Duarte, M. D. de Barros
{"title":"Prompt calculation of tower-footing impulse impedance considering different levels of conservativeness for the frequency dependence of soil parameters","authors":"R. Alípio, M. Guimarães, Naiara Duarte, M. D. de Barros","doi":"10.1109/ICLPandSIPDA54065.2021.9627427","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627427","url":null,"abstract":"This paper assesses the influence of the frequency dependence of soil parameters on tower-footing grounding systems, according to different levels of conservativeness. Practical formulas are proposed for immediate estimation of the tower-footing grounding impedance from the low-frequency grounding resistance. The quality of the proposed formulas is verified by comparing the results they provide with that obtained from a numerical electromagnetic approach. It is shown that the frequency dependence of soil parameters leads to a decrease of the tower-footing impedance, in comparison with the low-frequency resistance, and that the adopted level of conservativeness is relevant to quantify such decrease. It is also shown that, even considering a conservative approach, the frequency dependence of soil parameters leads to decreases of the impulse impedance higher than 15% in the case of high-resistivity soils.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":"26 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72674415","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
Meshed Ring Earth Electrode below Potential Control Conductor in Insulated Concrete Foundation 绝缘混凝土基础中电位控制导线下的网状环形接地电极
中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627452
M. Rock, Christian Drebenstedt
{"title":"Meshed Ring Earth Electrode below Potential Control Conductor in Insulated Concrete Foundation","authors":"M. Rock, Christian Drebenstedt","doi":"10.1109/ICLPandSIPDA54065.2021.9627452","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627452","url":null,"abstract":"In cases where the foundation earth electrode cannot act as lightning protection grounding system due to electrical insulation, a meshed ring earth electrode can be installed below the foundation plate. This ring earth electrode should have small mesh width so that high potential differences to the foundation earth electrode, which then serves as potential control conductor, do not occur when lightning current diverts into ground. Comparatively small potential differences were calculated for different variants of this arrangement, so that breakdown and damage to the concrete foundation is not to be expected. Nevertheless, small mesh widths of the ring earth electrode result in low potential differences, thus achieving safe lightning protection grounding system.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":"97 4 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72579980","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
Statistical analysis on preliminary breakdown pulses in negative cloud-to-ground flashes occurred in Colombia 哥伦比亚发生的云对地负闪电初步击穿脉冲的统计分析
中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627401
C. Granados, H. Rojas, F. Roman
{"title":"Statistical analysis on preliminary breakdown pulses in negative cloud-to-ground flashes occurred in Colombia","authors":"C. Granados, H. Rojas, F. Roman","doi":"10.1109/ICLPandSIPDA54065.2021.9627401","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627401","url":null,"abstract":"In this paper, a characterization of preliminary breakdown pulse trains (PBP trains) preceding the first return stroke (FRS) in 76 negative cloud to ground (-CG) lightning flashes occurred in Bogota, Colombia (tropical region located above 2500 meters of altitude) is presented. For the measurement campaign, a broadband parallel-plate antenna system was used with a 500 ms full observation window and a pre-trigger time of 250 ms. After execution a statistical analysis, several results were obtained. The geometric mean (GM) and the arithmetic mean (AM) of the time interval between the largest peak of the PBP train and the maximum value of the FRS (PBP - FRS interval) was 1.08 ms and 1.39 ms, respectively. In addition, the AM of pulse train duration and the ratio between the peak value of the PBP train and its FRS (PBPmax/FRS ratio) were 1.39 ms and 0.55 p.u., respectively. Finally, the number of pulses of the PBP trains characterized were located in the range of 3 to 72 pulses.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":"143 1","pages":"01-05"},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75933316","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":"14 1","pages":"1-6"},"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
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":"34 1","pages":"1-4"},"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
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":"5 1 1","pages":"01-05"},"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
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":"7 1","pages":"1-4"},"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
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