该公式可计及雷电流波头陡度对磁场的影响。
The formula can reflect the influence of the wavefront steepness of lightning current on the transient magnetic field.
雷电流通过塔架和铜缆经基础接地传到大地中。
The electricity conduct to earth from the base of tower and copper cable.
降阻剂并不能降低接地极在强雷电流下的冲击接地电阻。
Resistance-reducing agent does not reduce the impulse grounding resistance under large lightning current.
文中还对怎样估计实际雷电流下的电缆转移阻抗提出了建议。
A proposal to estimate the transfer impedance in case of lightning current has been offered.
介绍了一种新型的磁多谐振荡式直流小电流传感器在雷电流测量中应用。
A new weak DC sensor which is used in measurement of lightning current is introduced.
通过系统可实时获得雷击的时间、位置、强度、极性、雷电流等雷电参数。
Some thunder and lightning parameters such as time, position, intensity, polarity of thunder strike could be obtained quickly by this system.
总结了雷电流幅值的累积概率分布，研究了雷暴日与地闪密度之间的关系。
The spacitial distributions of lightning acativities were shown in Google Earth (GE). Meanwhile, the relationship between lightning day and ground lightning density had been investigated.
并根据雷击跳闸率的变化和雷电流在杆塔中的分流情况，说明改进防雷措施。
The improvement anti-lightning stroke measure was proved by the variation of lightning trip-out rate and the tower-drainage of lightning current.
接地的目的是提供故障电流和雷电流泄流通道，保证系统、设备和人员安全。
The aim of grounding is to provide the discharging channels for fault current and lightning current and ensure the safety of the system, the equipment and the personnel.
结合现场分析了雷击爆炸的原因是雷电流沿油气管线进洞，在洞内放电跳火。
The reason for cave shorage explosion caused by lightning is the sparks brought about by the electric current that comes into the cave along oil and gas pipe-lines.
雷电流特性的研究与雷电防护，是一个结合多学科的十分复杂困难的系统工程。
The research of the lightning current's characteristics and lightning protections is a multi-subject of the combination and a very complex and difficult systematic engineering.
本文分析了雷电造成的危害，并论述了飞机结构设计应该为雷电流提供低阻抗的通路。
The harm from lightning is analyzed in this paper, and it is demonstrated that low impedance pass should be provided in aircraft design for lightning current.
采用雷电综合定位系统，可精确测出雷电发生的时间、地点、雷电流幅值等雷电参数。
By the combined lightning locating system, the time, the position, the amplitude of lightning current, the parameters of lightning, etc, can be precisely measured.
在这一雷电暂态过程中，各分支上流过的雷电流将在建筑物的内部空间产生暂态磁场。
In the transient process of lightning, the lightning current flowing in all the branches will cause transient magnetic field in the inner space of the substation building.
分析并计算了因雷电流的幅值和雷电先导入射角，以及地面倾角变化对绕击率的影响。
And it shows that the shielding failure rate is a function of the ang1e of lightning incidence, strokes lightning amplitude and ground ang1e.
通过试验研究了弱电设备电气连线、制电路板及低压系统保险丝管等耐受雷电流的能力。
Lightning current withstand capacity test of electronic equipment wires and fuse links in low voltage power systems is conducted in laboratory.
在电力系统防雷保护与雷电特性基础研究工作中，雷电流的最大陡度、幅值具有重要的意义。
The max lightning steepness and lightning peak current have the important significance to the base researching work of the lightning-protection in the power system and the lightning characteristics.
这样通过延伸机组的接地网进一步降低接地电阻，使雷电流迅速流散入大地而不产生危险的过电压。
Therefor by earthing connected net of set, it reduce earthing resistance, make the electricity discharge in earth prompt without dangerous overvoltage.
本文首次提出对电缆沟内的接地线采用并联分流的方法降低地线内通过的雷电流，减少电缆感应电压。
To reduce induced voltage on cables it's the first time this dissertation adopt the distributary methods which a branch grounding wire flows away from the main grounding wires.
汇集到机舱底座的雷电流，传送到塔架，由塔架本体将雷电流传输到底部，并通过接入点传输到接地网。
Lightning electricity is collected in the base of engine, transmit to tower, from the tower to the base, and by earthing point to earthing net.
应用改进的电气几何模型分析了输电线路杆塔结构、避雷线和导线的布置、雷电流的幅值、地面倾角对绕击率的影响。
With such model the effect of tower structure, lightning current amplitude, angle of the lightning incidence, as well as the ground angle on the shielding failure rate are analyzed.
讨论了雷云对地放电过程中的雷电流的特性，解释了非周期雷电流产生的电磁场的特性，并用一个雷电流实例进行了分析说明。
The feature of electromagnetic wave produced on discharge process from thundercloud to ground is discussed. A non-cycle lightning current model is built to explain it.
提出了一种利用电磁暂态程序(EMTP)来计算雷击发生时建筑物内部金属框架上雷电电流分布的方法。
A method of calculating the lightning current distribution on the metal frame of building by using electromagnetic transient program (EMTP) was presented.
分析表明，绕击时避雷器能够耐受雷电作用时的放电电流和吸收的雷电放电能量。
The calculated results show that the line ZnO surge arrester can withstand the discharge current and the absorbed lightning energy.
对雷电保护系统电路模型进行了分析，讨论了不同因素对电流分布的影响。
The paper analyses the electrical circuit model as well as the influence of different factors on current distribution.
模型对于特定的雷电通道底部电流，采用了汉时间常数，取得了比单时间常数更好的拟合效果。
The current at the channel base is specified, and use two time constants can get the much better shapes than single time constant.
方法用无感电阻网络分流器测量雷电冲击电流，并进行测量重复性、线性度试验和阶跃波响应试验。
Methods to measure the lightning surge current using a shunt with non-inductance resistors network. The experiments on the repetition, linear degree and the step response are carried out.
采用雷电回击电流的传输线模型得到了雷电电磁脉冲场的近场近似。
With the transmission line model of the lightning return stroke, the approximate expressions of the adjacent field of lightning electromagnetic pulse are obtained.
采用雷电回击电流的传输线模型得到了雷电电磁脉冲场的近场近似。
With the transmission line model of the lightning return stroke, the approximate expressions of the adjacent field of lightning electromagnetic pulse are obtained.
应用推荐