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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.


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

Antonio Carlos Lima    
Federal University of Rio de Janeiro

Maria Teresa Correia de Barros    


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