Lightning and transmission lines

Wagner, C. F.

doi:10.1016/0016-0032(67)90601-1

Cited by 10 publications

(3 citation statements)

References 40 publications

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“…Figure 5 shows similar distributions if a 100 m gap is assumed, with results for a 6 km plane cloud model shown for comparison. The variation is roughly exponential and the numerical values are close to the constant value derived by Wagner (1967) (equivalent to 12 x 10-4 C m-1 in figure 4). Up to 1000 m the values of h are not very dependent on the model, but at 2000 m the value of h for a plane cloud is only one-third of that for a spherical cloud and the ratio increases as the base of the cloud is approached.…”

Section: E-supporting

confidence: 82%

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Transmission line representation of a lightning return stroke

Little¹

1978

J. Phys. D: Appl. Phys.

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In order to deduce the form of the current pulse in a lightning return stroke at altitude from measurements made at ground level, a model of the channel is required. Inductance and capacitance values for a ladder LCR network representing the lightning channel are deduced from the initial electrostatic field distribution around a simplified model of a charged cloud and a vertical unbranched leader. The resistance of the channel is assumed constant with height, and all the network parameters are assumed independent of time. Current pulses are calculated at ground level and at various heights. The pulse parameters deduced at ground level are in rough agreement with observation. The predicted variation of the current pulse with altitude is discussed, and the implications for assessing the risks to aircraft are briefly described.

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Section: E-supporting

confidence: 82%

“…We assume here a radius of 2 cm and approximate the field lines by circles. The value of L* deduced is approximately 2 x H m-1 in all cases, similar to the value used by Wagner (1967) (1.8 x 10-6 H m-1).…”

Section: Inductance Elementssupporting

confidence: 81%

Transmission line representation of a lightning return stroke

Little¹

1978

J. Phys. D: Appl. Phys.

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“…En el periodo comprendido entre 1950 y 1970, se estableció un fuerte compromiso para proteger las líneas de transmisión de energía eléctrica contra el efecto de los impactos directos de rayos en Estados Unidos. Como consecuencia, se generó una extensa investigación, donde investigadores como Whitehead, Hileman y Wagner realizaron importantes contribuciones [37][38] [39], que constituyeron, posteriormente, la base del actual método de la esfera rodante o Rolling Sphere Method (RSM).…”

Section: Sistemas De Protección Contra El Rayounclassified

Contribuciones a los sistemas de protección contra el rayo

Muñoz¹

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Nowadays some measuring system has been developed in order to measure directly electrical activity in tall objects likes power distribution lines, in this case, the obtained results are employed in the design of the protection systems. In the case of lightning rod installation in buildings, there are not so many collected data since there is very poor monitoring of the real time behaviour of lightning. Besides, the protection model applied for lightning rod installation is still mainly based on theoretical models data which are been revised nowadays. Moreover, the statistical data about lightning characteristics have been registered in some few points where equipment has been installed (mostly in tall structures, mountains, etc..) which may not be representative of the wide variety of different types of installations and emplacements. This paper describes the design and acquisition strategy followed to obtain an autonomous measurement micro station developed to measure some lightning parameters in a wide mesh of real lightning rods installations. Micro stations are small acquisition systems allowing measurement of electric activity in the lightning rod and electric field recording in the previous moments of the lightning stroke and some milliseconds after. The main utility of this system is the possibility to create a distributed network of sensors in several installations around a large area. Instead of triggering lightning or choosing points with high number of lightning impacts, the use of several measurement points should provide an acceptable amount of data in real installations correlated to the nature of emplacement.

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From lightning to charged-device model electrostatic discharges

Lin¹,

Welsher²

1993

Journal of Electrostatics

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Lightning and transmission lines

Cited by 10 publications

References 40 publications

Transmission line representation of a lightning return stroke

Transmission line representation of a lightning return stroke

Contribuciones a los sistemas de protección contra el rayo

From lightning to charged-device model electrostatic discharges

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