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Underground cable systems ground return sensitivity to soil inaccuracies

The ground characterization of an undeground cables installation may
be poorly known and present a wide variation throughout the year.
This represents a challenge when it comes to an accurate evaluation of
transient overvoltages/currents and the correct assessment of voltage and current profiles throughout the circuit.

This paper presents a discussion based
on a sensitivity analysis for the ground return impedance of
underground cables systems to soil resistivity, which is typically
considered as a deterministic parameter
Results are carried in the frequency
domain and are presented for different cable system configurations.

Author(s):

João Pedro Salvador    
Federal Center of Technological Education Celso Suckow da Fonseca,
Brazil

Antonio Carlos Lima    
Federal University of Rio de Janeiro
Brazil

Maria Teresa Correia de Barros    
IST-ULisboa
Portugal

 

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