Differences in M-components between triggered lightning striking the ground and overhead line

IF 4.4 2区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
High Voltage Pub Date : 2024-12-16 DOI:10.1049/hve2.12493
Li Cai, Yiyang Du, Wenchao Fan, Mi Zhou, Jianguo Wang, Jinxin Cao, Yadong Fan
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Abstract

In the summer of 2018–2019, rocket-triggered lightning experiments were conducted in Guangzhou, China. There were two types of lightning targets: ground and overhead line. By comparing the current and the electric field data in the two cases, it was found that when the continuous current level (ICC) and current amplitude (IM) of M-components (current pulses generated during the continuous current stage) are large, the time difference between the electric field peak and the current peak (TD) will always be small. The rise time (RT) and half peak width (THPW) of M-components with high ICC and IM are low in both the cases. The threshold upper limit of TD in the case of lightning striking the ground is higher, approximately 2.6 times than that in the case of lightning striking the overhead line. We use an optimised guided wave model to simulate the electric field waveforms of M-components. It was found that the shorter RT and THPW of the M-component, the smaller TD. The changes in wave speed and IM cannot affect the size of TD, and the impact of distance changes is very weak. The difference in the threshold upper limit of TD may be related to the significant difference in ground impedance in two cases.

Abstract Image

触击地面和架空线路的雷击m分量差异
2018-2019年夏天,在中国广州进行了火箭触发闪电实验。有两种类型的闪电目标:地面和架空线路。通过对比两种情况下的电流和电场数据,可以发现当m分量(连续电流级产生的电流脉冲)的连续电流电平(ICC)和电流幅值(IM)较大时,电场峰值与电流峰值(TD)的时间差始终较小。在两种情况下,高ICC和IM的m分量的上升时间(RT)和半峰宽(THPW)都很低。雷击地时的TD阈值上限比雷击架空线路时的TD阈值上限高,约为2.6倍。我们使用一个优化的导波模型来模拟m分量的电场波形。结果表明,m分量的RT和THPW越短,TD越小。波速和IM的变化对TD的大小没有影响,距离变化对TD的影响很弱。在两种情况下,TD阈值上限的差异可能与地阻抗的显著差异有关。
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来源期刊
High Voltage
High Voltage Energy-Energy Engineering and Power Technology
CiteScore
9.60
自引率
27.30%
发文量
97
审稿时长
21 weeks
期刊介绍: High Voltage aims to attract original research papers and review articles. The scope covers high-voltage power engineering and high voltage applications, including experimental, computational (including simulation and modelling) and theoretical studies, which include: Electrical Insulation ● Outdoor, indoor, solid, liquid and gas insulation ● Transient voltages and overvoltage protection ● Nano-dielectrics and new insulation materials ● Condition monitoring and maintenance Discharge and plasmas, pulsed power ● Electrical discharge, plasma generation and applications ● Interactions of plasma with surfaces ● Pulsed power science and technology High-field effects ● Computation, measurements of Intensive Electromagnetic Field ● Electromagnetic compatibility ● Biomedical effects ● Environmental effects and protection High Voltage Engineering ● Design problems, testing and measuring techniques ● Equipment development and asset management ● Smart Grid, live line working ● AC/DC power electronics ● UHV power transmission Special Issues. Call for papers: Interface Charging Phenomena for Dielectric Materials - https://digital-library.theiet.org/files/HVE_CFP_ICP.pdf Emerging Materials For High Voltage Applications - https://digital-library.theiet.org/files/HVE_CFP_EMHVA.pdf
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