Publication

Mitigation of Lightning-Induced Overvoltages in Medium Voltage Distribution Lines by Means of Periodical Grounding of Shielding Wires and of Surge Arresters

Farhad Rachidi-Haeri
2000

Abstract

In this paper, we investigate the effect of periodically grounded shielding wires and surge arresters on lightning-induced voltages. We first discuss the adequacy of the commonly made assumption according to which the shielding wire is assumed at ground potential and not considered as one of the conductors of the multiconductor system. Then we compare the mitigation effect of shielding wires with that achievable by the insertion of surge arresters along the line. The computation results are validated by means of experimental results and, when possible, by calculation results obtained by other authors.

Official source

https://infoscience.epfl.ch/entities/publication/2677d132-b6ae-4000-9034-4be3aa7151d7

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Farhad Rachidi-Haeri
2000

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/2677d132-b6ae-4000-9034-4be3aa7151d7

About this result

Related concepts (32)

Surge protector

A surge protector (or spike suppressor, surge suppressor, surge diverter, surge protection device (SPD) or transient voltage surge suppressor (TVSS) is an appliance or device intended to protect electrical devices from voltage spikes in alternating current (AC) circuits. A voltage spike is a transient event, typically lasting 1 to 30 microseconds, that may reach over 1,000 volts.

Lightning rod

A lightning rod or lightning conductor (British English) is a metal rod mounted on a structure and intended to protect the structure from a lightning strike. If lightning hits the structure, it will preferentially strike the rod and be conducted to ground through a wire, instead of passing through the structure, where it could start a fire or cause electrocution. Lightning rods are also called finials, air terminals, or strike termination devices. In a lightning protection system, a lightning rod is a single component of the system.

Ground (electricity)

In electrical engineering, ground or earth may be a reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the Earth. Electrical circuits may be connected to ground for several reasons. Exposed conductive parts of electrical equipment are connected to ground, to protect users from electrical shock hazard. If internal insulation fails, dangerous voltages may appear on the exposed conductive parts.

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Mitigation of Lightning-Induced Overvoltages in Medium Voltage Distribution Lines by Means of Periodical Grounding of Shielding Wires and of Surge Arresters

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