Publication

TRANSIENT ELECTRIC FIELD IN GAS INSULATED SUBSTATIONS AND COUPLING WITH SECONDARY CABLES

Michel Ianoz, Daniel Tabara
1998

Abstract

In the last years gas insulated substations (GIS) have found a broad range of applications in various countries, in particular inside densely populated cities. Switching operations in GIS are generating very fast travelling waves having 5 - 10 ns rise times which propagate outside the GIS enclosure. The coupling between the radiated electric field and low-voltage cables induces currents in cable sheaths.To improve the electromagnetic compatibility of electronic devices by proper shielding and correct cable routing, the estimation of the amplitude of these currents can be very useful. Modelling of GIS, calculation of the electric field radiated by the GIS enclosure and the coupling between this field and secondary cables are the main subject of this paper. The models have been created using three computer codes. First two codes are well known namely the Electromagnetic Transients Program (EMTP) and the Numerical Electromagnetic Code (NEC). The third code is a coupling code developed in our laboratory. The equivalent models of the GIS should be suitable for a wide frequency spectrum (from hundreds of kilohertz up to hundreds of megahertz). Measurements of different phenomena were performed in a 125 kV GIS of the Electrical Utilities of Lausanne. Verifications of simulation results with measurements are presented.

Official source

https://infoscience.epfl.ch/entities/publication/c0589f39-e343-480f-b0f6-41396814fde5

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Michel Ianoz, Daniel Tabara
1998

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/c0589f39-e343-480f-b0f6-41396814fde5

About this result

Related concepts (32)

Electric field

An electric field (sometimes E-field) is the physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them. It also refers to the physical field for a system of charged particles. Electric fields originate from electric charges and time-varying electric currents. Electric fields and magnetic fields are both manifestations of the electromagnetic field, one of the four fundamental interactions (also called forces) of nature.

Electrical substation

A substation is a part of an electrical generation, transmission, and distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Between the generating station and consumer, electric power may flow through several substations at different voltage levels. A substation may include transformers to change voltage levels between high transmission voltages and lower distribution voltages, or at the interconnection of two different transmission voltages.

Electromagnetic compatibility

Electromagnetic compatibility (EMC) is the ability of electrical equipment and systems to function acceptably in their electromagnetic environment, by limiting the unintentional generation, propagation and reception of electromagnetic energy which may cause unwanted effects such as electromagnetic interference (EMI) or even physical damage to operational equipment. The goal of EMC is the correct operation of different equipment in a common electromagnetic environment. It is also the name given to the associated branch of electrical engineering.

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TRANSIENT ELECTRIC FIELD IN GAS INSULATED SUBSTATIONS AND COUPLING WITH SECONDARY CABLES

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