Gas Insulated HV and EHV Transmission Lines are a new technology for transmitting high power ratings over long distances. A previous paper [1] was devoted to predict the current distribution along with the external flux density in this multiconductor system highlighting its proximity effect. It served as the vehicle for the present further research taking into account the thermal problems coupled to electromagnetic field. Thereby the aim of the present paper is to show the MVA rating considering both the directly buried and the concrete tunnel installations. Despite of simplifications and approximated analytical approaches, FEM model is able to study the precise maximum allowable temperature rise according with IEC 61640.
Solution of Coupled Electromagnetic and Thermal Problems in Gas Insulated Transmission Lines
BENATO, ROBERTO;DUGHIERO, FABRIZIO
2002
Abstract
Gas Insulated HV and EHV Transmission Lines are a new technology for transmitting high power ratings over long distances. A previous paper [1] was devoted to predict the current distribution along with the external flux density in this multiconductor system highlighting its proximity effect. It served as the vehicle for the present further research taking into account the thermal problems coupled to electromagnetic field. Thereby the aim of the present paper is to show the MVA rating considering both the directly buried and the concrete tunnel installations. Despite of simplifications and approximated analytical approaches, FEM model is able to study the precise maximum allowable temperature rise according with IEC 61640.Pubblicazioni consigliate
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