人工触发闪电先驱电流脉冲波形特征及模拟
2010—2014年夏季广州野外雷电试验基地采用了两种引雷火箭开展人工引雷试验,通过对25次经典人工触发闪电电流资料的分析,进一步证实了当火箭携带铜线时先驱电流脉冲（precursor current pulse）为双极性振荡型,火箭携带钢丝时先驱电流脉冲为单极性,其中单极性脉冲电流峰值、10%～90%上升时间、波形宽度和转移电荷量的几何平均值分别为26 A,0.33μs,2.3μs,27μC,双极性脉冲相应的波形参数几何平均值分别为67 A,0.24μs,2.1μs,54μC。双极性脉冲电流峰值的几何平均值接近是单极性的2.6倍,而波形持续时间和上升时间的几何平均值与单极性相近。利用传输线模...
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| Published in | 应用气象学报 Vol. 27; no. 6; pp. 716 - 724 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
广州野外雷电试验基地,广州510080%中国气象科学研究院灾害天气国家重点实验室/雷电物理和防护工程实验室,北京100081
2016
广州野外雷电试验基地,广州510080%广东省防雷中心,广州,510080%广州野外雷电试验基地,广州510080 新疆防雷减灾中心,乌鲁木齐830001 广东省防雷中心,广州510080 中国气象科学研究院灾害天气国家重点实验室/雷电物理和防护工程实验室,北京100081 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-7313 |
| DOI | 10.11898/1001-7313.20160608 |
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| Summary: | 2010—2014年夏季广州野外雷电试验基地采用了两种引雷火箭开展人工引雷试验,通过对25次经典人工触发闪电电流资料的分析,进一步证实了当火箭携带铜线时先驱电流脉冲（precursor current pulse）为双极性振荡型,火箭携带钢丝时先驱电流脉冲为单极性,其中单极性脉冲电流峰值、10%～90%上升时间、波形宽度和转移电荷量的几何平均值分别为26 A,0.33μs,2.3μs,27μC,双极性脉冲相应的波形参数几何平均值分别为67 A,0.24μs,2.1μs,54μC。双极性脉冲电流峰值的几何平均值接近是单极性的2.6倍,而波形持续时间和上升时间的几何平均值与单极性相近。利用传输线模型,模拟铜线通道底部电流波形呈双极性振荡型,而钢丝通道底部电流波形呈单极性,这与实际测量的结果比较一致,推测这两种电流波形可能是传输线特性阻抗不同所导致,在传输线顶端由先导起始放电产生的电流脉冲应为单极性。 |
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| Bibliography: | During summers from 2010 to 2014,two kinds of rocket are used for artificially triggered lightning experiments in Guangzhou Field Experiment Site for Lightning Research and Testing.Based on the analysis upon current data of 25 classical rocket-and-wire triggered lightings,it can be confirmed that the unipolar precursor pulse is generated from the lightning triggered by copper wire,while the unipolar precursor pulse is generated from the lightning triggered by steel wire.As for the unipolar precursor pulse,the geometric mean（GM） values of peak current,rise time,duration of waveform and charge transfer are 26 A,0.33 μs,2.3 μs and 27 μC,respectively.While for the bipolar precursor pulse,the corresponding values are 67 A,0.24 μs,2.1 μs and 54 μC,respectively.The GM value of peak current for bipolar precursor pulse is close to 2.6 times that of the unipolar precursor pulse,however,GM values of duration and rise time are similar.Furthermore,the channel base current waveforms generated from copper and steel line are |
| ISSN: | 1001-7313 |
| DOI: | 10.11898/1001-7313.20160608 |