Publication

Computer modelling of metalclad switchgear: calculation of very fast transient overvoltages with the aid of the EMTP computer program

Michel Ianoz
1996
Journal Articles

Abstract

Over the past 20 years the use of metalclad switchgear has spread steadily throughout electrical networks and its reliability continues to improve. To optimise the dimensions it is necessary to calculate exactly the transient overvoltages due to various causes (switching operations, short-circuits, lightning surges, etc.). The necessary models of the main components can be created using the Electromagnetic Transients Program so that an event can be simulated and the response of the electrical equipment of a metalclad substation to one or other event can be calculated

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https://infoscience.epfl.ch/entities/publication/6a0304cf-383b-4d74-a784-d90e23cbebaf

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Michel Ianoz
1996
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/6a0304cf-383b-4d74-a784-d90e23cbebaf

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.

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In electrical engineering, spikes are fast, short duration electrical transients in voltage (voltage spikes), current (current spikes), or transferred energy (energy spikes) in an electrical circuit. Fast, short duration electrical transients (overvoltages) in the electric potential of a circuit are typically caused by Lightning strikes Power outages Tripped circuit breakers Short circuits Power transitions in other large equipment on the same power line Malfunctions caused by the power company Electromagnetic pulses (EMP) with electromagnetic energy distributed typically up to the 100 kHz and 1 MHz frequency range.

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A lightning arrester (alternative spelling lightning arrestor) (also called lightning isolator) is a device, essentially an air gap between an electric wire and ground, used on electric power transmission and telecommunication systems to protect the insulation and conductors of the system from the damaging effects of lightning. The typical lightning arrester has a high-voltage terminal and a ground terminal. When a lightning surge (or switching surge, which is very similar) travels along the power line to the arrester, the current from the surge is diverted through the arrester, in most cases to earth.

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Computer modelling of metalclad switchgear: calculation of very fast transient overvoltages with the aid of the EMTP computer program

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