2012 International Conference on Lightning Protection (ICLP)最新文献_第4页

Behavior of corona current and atmospheric variables under thunderstorm conditions: Thunderstorm prediction algorithm 雷暴条件下日冕电流和大气变量的行为:雷暴预测算法

2012 International Conference on Lightning Protection (ICLP) Pub Date : 2012-11-12 DOI: 10.1109/ICLP.2012.6344379

D. Ariza, Francisco Roman, O. Montero, O. Escobar, Francisco Javier Vela Santamaría

引用次数: 3

Dielectric strength measurements in photovoltaic modules 光伏组件的介电强度测量

2012 International Conference on Lightning Protection (ICLP) Pub Date : 2012-11-12 DOI: 10.1109/ICLP.2012.6344348

I. Naxakis, G. Peppas, E. Pyrgioti

引用次数: 0

Can LDN data provide corroborating evidence for a Lightning event at a specific geographic location? LDN数据能否为特定地理位置的闪电事件提供确凿证据?

2012 International Conference on Lightning Protection (ICLP) Pub Date : 2012-11-12 DOI: 10.1109/ICLP.2012.6344405

H. Hunt, K. Nixon, I. Jandrell

{"title":"Can LDN data provide corroborating evidence for a Lightning event at a specific geographic location?","authors":"H. Hunt, K. Nixon, I. Jandrell","doi":"10.1109/ICLP.2012.6344405","DOIUrl":"https://doi.org/10.1109/ICLP.2012.6344405","url":null,"abstract":"In many cases of lightning attachment, the exact timing of the event is unknown (property damage, loss of life etc.) making comparison with LDN data difficult. A methodology for matching data from a Lightning Detection Network (LDN) with to a possible location of attachment using only the reported positions of strokes is proposed. A case study of lightning attachment to a tall structure (Brixton Tower, Johannesburg, South Africa) is used to evaluate of the methodology. Photographs of the lightning attachments are time-correlated with data from the South African Lightning Detection Network (SALDN) and these results are compared with the results of the methodology. It is found that the methodology returns 40% false positive results and further evidence is needed to distinguish the time-correlated matches from the false positive results. The median confidence ellipses provided for each stroke are also investigated but it appears that this does not provide the evidence needed to do this. It is concluded that LDN data can provide corroborating evidence of lightning attachment to a location but cannot be used in isolation.","PeriodicalId":400743,"journal":{"name":"2012 International Conference on Lightning Protection (ICLP)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131706017","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

Ambiguity of grounding specifications: IEC 62305 revisited 接地规范的模糊性:重新审视IEC 62305

2012 International Conference on Lightning Protection (ICLP) Pub Date : 2012-11-12 DOI: 10.1109/ICLP.2012.6344293

S. C. Lim, Chandima Gomes, M. A. Kadir, J. Jasni

引用次数: 8

Impact of coupling ground wire on lightning protection effect of multi-circuit tower 耦合接地线对多回路塔防雷效果的影响

2012 International Conference on Lightning Protection (ICLP) Pub Date : 2012-11-12 DOI: 10.1109/ICLP.2012.6344297

Xi Wang, Zhen Li, Jinliang He

引用次数: 4

Transient characteristics of wind turbine grounding 风力发电机接地的暂态特性

2012 International Conference on Lightning Protection (ICLP) Pub Date : 2012-11-12 DOI: 10.1109/ICLP.2012.6344413

B. Markovski, L. Grcev, V. Arnautovski-Toseva

{"title":"Transient characteristics of wind turbine grounding","authors":"B. Markovski, L. Grcev, V. Arnautovski-Toseva","doi":"10.1109/ICLP.2012.6344413","DOIUrl":"https://doi.org/10.1109/ICLP.2012.6344413","url":null,"abstract":"The goal of the analysis in this paper is twofold. First, we analyze the influence of different grounding electrode arrangements on the transient ground potential rise in case of direct lightning strokes. Particularly, we analyze the influence of the integration of the metallic foundation reinforcement with the grounding system. In addition we analyze the influence of long (30 m) vertical electrodes and additional ring electrode. Next, we analyze soil ionization effects. We compute the distribution of the electric field in the earth in time domain (for typical lightning current pulses) looking for the volume within which the magnitude of the electric field is above the critical strength (300 kV/m). Then we look for the possibility to apply a simple formula to account for the soil ionization effects. The parameters in the analysis are varied for low and highly resistive earth and for lightning current pulses related to the first and subsequent return strokes. We apply a rigorous electromagnetic model for frequency dependent analysis and an approximate model to account for soil ionization effects. Both models have been previously validated by comparison with experiments.","PeriodicalId":400743,"journal":{"name":"2012 International Conference on Lightning Protection (ICLP)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132253049","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: 14

How the frequency dependence of soil parameters affects the lightning response of grounding electrodes 土壤参数的频率依赖性如何影响接地电极的雷电响应

2012 International Conference on Lightning Protection (ICLP) Pub Date : 2012-11-12 DOI: 10.1109/ICLP.2012.6344354

R. Alípio, S. Visacro

引用次数: 7

On the electric and magnetic fields below a single conductor overhead power line 单导体架空电力线下的电场和磁场

2012 International Conference on Lightning Protection (ICLP) Pub Date : 2012-11-12 DOI: 10.1109/ICLP.2012.6344307

V. Cooray, G. Cooray

引用次数: 0

Assessing the impact of subsequent strokes on the lightning performance of transmission lines of 138 kV 评估后续冲击对138千伏输电线路雷电性能的影响

2012 International Conference on Lightning Protection (ICLP) Pub Date : 2012-11-12 DOI: 10.1109/ICLP.2012.6344275

F. H. Silveira, S. Visacro, R. E. de Souza, A. De Conti

引用次数: 4

Research on the characteristics of upward leader emerging from the transmission lines influenced by operation voltage 运行电压对输电线路中出现的上行引线特性的影响研究

2012 International Conference on Lightning Protection (ICLP) Pub Date : 2012-11-12 DOI: 10.1109/ICLP.2012.6344237

Y. Liao, L. Jia, Zhizhao Li, R. Zeng, S. Chen

{"title":"Research on the characteristics of upward leader emerging from the transmission lines influenced by operation voltage","authors":"Y. Liao, L. Jia, Zhizhao Li, R. Zeng, S. Chen","doi":"10.1109/ICLP.2012.6344237","DOIUrl":"https://doi.org/10.1109/ICLP.2012.6344237","url":null,"abstract":"The problem whether the DC operation voltage can influence the characteristics of upward leader emerging from transmission lines is still in question since experiments and observation data is insufficient. It is necessary to study the relationship between the characteristics of the upward leaders and operation voltage. This paper presents some simulated experimental results of a combined plane-rod (PR) electrode to conductor air gap of 7 meter length. A current measuring instrument with frequency response of from DC to 6.5MHz was developed and used to measure the leader current. Besides, high speed CCD camera was used to observe the optical phenomenon of the whole process. The 200/2000μs impulse voltage up to 4MV and positive DC voltage up to 800kV was applied to the electrode and conductor respectively. The higher charge per unit in the leader channel and earlier inception time has been found along the higher DC voltage. These results have been compared with those in the gap that only impulse voltage was applied. Finally, the influence of positive DC voltage on the characteristics of upward leaders was discussed.","PeriodicalId":400743,"journal":{"name":"2012 International Conference on Lightning Protection (ICLP)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114952379","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