自然闪电条件下敷地线缆耦合试验

付亚鹏; 张琪; 高成; 孙征; 杜立航

doi:10.11884/HPLPB201830.180130

自然闪电条件下敷地线缆耦合试验

doi: 10.11884/HPLPB201830.180130

陆军工程大学电磁环境效应与光电工程国家级重点实验室, 南京 210007

基金项目:

国防科技基金项目 3602039

装备预研基金项目 614220601011704

详细信息

作者简介:
付亚鹏(1989－), 男，博士研究生，从事雷电观测与防护研究; fuyapeng312@sina.com

通讯作者:
张琪(1987－), 男，讲师，从事雷电防护研究; emczhq@163.com

中图分类号: O441.5
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出版历程
- 收稿日期: 2018-05-05
- 修回日期: 2018-07-23
- 刊出日期: 2018-10-15

Coupling test of cable on ground under condition of natural lightning

Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, Army Engineering University of PLA, Nanjing 210007, China

摘要

摘要: 研制了一套能够同时测量线缆皮线和芯线感应电流的试验系统，研究自然闪电条件下敷地线缆的耦合问题。结果表明：不同位置处的线缆皮线感应电流波形基本一致，但幅值存在一定差异，说明感应电流空间分布不均匀; 所测线缆芯线和皮线感应电流的时域波形和频谱比较相似，能量集中在1 kHz~1 MHz之间; 正负地闪芯线感应电压波形均为单一脉冲型，波形持续时间10~49 μs; 正地闪线缆感应电压的幅值范围及幅值平均值都大于负地闪相应结果，说明正地闪产生的线缆耦合作用大于负地闪; 不同雷电过程的线缆感应电压幅值与磁感应强度有较小的相关性，而同一雷电过程则基本成线性关系; 正地闪线缆感应电压波形持续时间、半峰值宽度、10%~90%上升时间的范围及均值都比负地闪的要大。
- 线缆耦合 /
- 自然闪电 /
- 敷地线缆 /
- 耦合试验 /
- 感应电压
Abstract: A test system capable of simultaneously measuring the induced currents in the cable shield and inner conductor was developed to study the coupling problem of the cable on the ground under the natural lightning condition. The results show that: Waveforms of cable induced currents in the cable shield at different positions are basically the same, but the amplitudes are different which shows that the spatial distribution of the induced currents is not uniform. The time-domain waveforms and frequency spectrums of the induced currents measured in the inner conductor and cable shield are alike and the energy is concentrated between 1 kHz and 1 MHz. The induced voltage waveforms in the inner conductor of the positive and negative cloud-to-ground lightning are all single-pulse waveforms with a duration of 10-49 μs. The amplitude and their mean value of the cable induced voltages of the positive cloud-to-ground lightning are greater than the corresponding results for negative cloud-to-ground lightning, indicating that the cable coupling effect of positive cloud-to-ground lightning is greater than that of the negative cloud-to-ground lightning. The cable induced voltage amplitude and magnetic flux density of different lightning processes have small correlation and the same lightning process is basically linear. The cable induced voltage waveform duration time, the half-peak width, the range of the 10%-90% rise time and their average value of the positive cloud-to-ground lightning are all greater than those of the negative cloud-to-ground lightning.
- cable coupling /
- natural lightning /
- cable on the ground /
- coupling test /
- induced voltage

HTML全文

图 1 线缆耦合试验配置图

Figure 1. Configuration diagram of cable coupling test

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图 2 电流探头内部结构图

Figure 2. Internal structure of current probe

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图 3 电流探头实物照片

Figure 3. Photos of current probe

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图 4 Rogowski线圈等效电路图

Figure 4. Equivalent circuit diagram of Rogowski coil

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图 5 2017年8月18日16:04:12负地闪线缆耦合感应电流

Figure 5. Negative cloud-to-ground lightning cable coupling induced current at August 18, 2017, 16:04:12

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图 6 线缆耦合感应电流频谱

Figure 6. Spectrum of cable coupling induced current

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图 7 SYV50-5型同轴电缆转移阻抗

Figure 7. Transfer impedance of SYV50-5 coaxial cable

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图 8 芯线感应电流

Figure 8. Induced currents in the inner conductor

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图 9 2017年8月24日15:13:28负地闪芯线感应电压波形

Figure 9. Negative cloud-to-ground lightning induced voltages in the inner conductor at August 24, 2017, 15:13:28

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图 10 2017年8月19日17:18:54正地闪芯线感应电压波形

Figure 10. Positive cloud-to-ground lightning induced voltages in the inner conductor at August 19, 2017, 17:18:54

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图 11 线缆感应电压幅值与磁感应强度幅值关系

Figure 11. Relationship between the amplitude of cable induced voltage and magnetic flux density

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图 12 线缆感应电压波形特征分布

Figure 12. Waveform characteristic distribution of cable induced voltage

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表 1 正地闪线缆感应电压波形参数

Table 1. Waveform parameters of positive cloud-to-ground lightning cable induced voltage

waveform parameter	voltage parameter/μs
waveform parameter	range	AM	GM	SD
waveform duration time	8.0~32.9	17.82	16.33	7.17
half peak value width	2.2~11.3	4.81	4.34	2.39
10%~90% rise time	2.3~6.7	4.46	4.68	1.30

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参考文献(15)

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