{"title":"热带和温带地区第一次回冲电流分布对输电线路反闪发生评估的影响","authors":"F. H. Silveira, Frederico S. Almeida, S. Visacro","doi":"10.1109/ICLPandSIPDA54065.2021.9627477","DOIUrl":null,"url":null,"abstract":"The effect of first return stroke current distributions of tropical and temperate regions on the assessment of backflashover occurrence of transmission lines is analyzed by means of computational simulations. Current parameters and associated distributions derived from the measurements performed at Morro do Cachimbo station (MCS), Brazil, that comprise 51 negative cloud-to-ground flashes and median first stroke peak current of 43 kA are considered. The results were compared with those obtained from the application of current parameters derived in a temperate region at Mount San Salvatore station (MSS), Switzerland and the cumulative peak current of first strokes recommended by IEEE Std 1243. Sensitivity analyses were developed considering typical configurations of 138-kV and 230-kV transmission lines in a wide range of tower-footing grounding impedance and representative first stroke current waveform. The obtained results revealed about 44%-to-54% larger and 54%-to-28% lower backflashover probability related to the application of MCS peak current distribution data, in the 20-to-40-Ω tower-footing grounding impedance range, for the 138-kV and 230-kV transmission lines, respectively.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Influence of First Return Stroke Current Distributions of Tropical and Temperate Regions on the Assessment of Backflashover Occurrence of Transmission Lines\",\"authors\":\"F. H. Silveira, Frederico S. Almeida, S. Visacro\",\"doi\":\"10.1109/ICLPandSIPDA54065.2021.9627477\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The effect of first return stroke current distributions of tropical and temperate regions on the assessment of backflashover occurrence of transmission lines is analyzed by means of computational simulations. Current parameters and associated distributions derived from the measurements performed at Morro do Cachimbo station (MCS), Brazil, that comprise 51 negative cloud-to-ground flashes and median first stroke peak current of 43 kA are considered. The results were compared with those obtained from the application of current parameters derived in a temperate region at Mount San Salvatore station (MSS), Switzerland and the cumulative peak current of first strokes recommended by IEEE Std 1243. Sensitivity analyses were developed considering typical configurations of 138-kV and 230-kV transmission lines in a wide range of tower-footing grounding impedance and representative first stroke current waveform. The obtained results revealed about 44%-to-54% larger and 54%-to-28% lower backflashover probability related to the application of MCS peak current distribution data, in the 20-to-40-Ω tower-footing grounding impedance range, for the 138-kV and 230-kV transmission lines, respectively.\",\"PeriodicalId\":70714,\"journal\":{\"name\":\"中国防雷\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-09-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"中国防雷\",\"FirstCategoryId\":\"1089\",\"ListUrlMain\":\"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627477\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"中国防雷","FirstCategoryId":"1089","ListUrlMain":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627477","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
摘要
采用计算模拟的方法,分析了热带和温带地区输电线路一次回冲电流分布对反闪络发生评估的影响。考虑了在巴西Morro do Cachimbo站(MCS)进行的测量得出的电流参数和相关分布,包括51次负云对地闪光和43 kA的中位第一冲程峰值电流。将所得结果与瑞士Mount San Salvatore站(MSS)温带地区电流参数的应用结果以及IEEE Std 1243推荐的首冲程累积峰值电流进行了比较。考虑了138kv和230kv输电线路的典型配置,在大范围的塔基接地阻抗和具有代表性的首冲程电流波形下,进行了灵敏度分析。结果表明,在20 ~ 40-Ω塔基接地阻抗范围内,应用MCS峰值电流分布数据,138-kV和230-kV输电线路的反闪络概率分别增大44% ~ 54%和54% ~ 28%。
Influence of First Return Stroke Current Distributions of Tropical and Temperate Regions on the Assessment of Backflashover Occurrence of Transmission Lines
The effect of first return stroke current distributions of tropical and temperate regions on the assessment of backflashover occurrence of transmission lines is analyzed by means of computational simulations. Current parameters and associated distributions derived from the measurements performed at Morro do Cachimbo station (MCS), Brazil, that comprise 51 negative cloud-to-ground flashes and median first stroke peak current of 43 kA are considered. The results were compared with those obtained from the application of current parameters derived in a temperate region at Mount San Salvatore station (MSS), Switzerland and the cumulative peak current of first strokes recommended by IEEE Std 1243. Sensitivity analyses were developed considering typical configurations of 138-kV and 230-kV transmission lines in a wide range of tower-footing grounding impedance and representative first stroke current waveform. The obtained results revealed about 44%-to-54% larger and 54%-to-28% lower backflashover probability related to the application of MCS peak current distribution data, in the 20-to-40-Ω tower-footing grounding impedance range, for the 138-kV and 230-kV transmission lines, respectively.