Excessive capacitance current has been one of the most important problems to power cable transmission lines. In order to reduce the line-to-ground capacitance current

we developed large-inductance power cable through adding a magnetic layer to the core of conventional power cable. Methods for calculating the inductance and capacitance of this large-inductance cable were presented. Moreover

we established finite element simulation models of both large-capacitance cable and conventional cable in ANSYS to compare them in the aspects of conductor resistance

insulation resistance

inductance

capacitance

skin effect

and eddy current loss. Capacitance current to ground and transient capacitance current under grounding faults of the two kinds of cables were also compared using models of capacitance current to gr

ound established in MATLAB. The results show that

while meeting all the basic technical requirements of conventional power cables

the large-inductance cable has inductance per unit length as 2

1

0 times much as that of conventional power cables

along with capacitive current will be reduced by 10%

2

0%

and eddy current loss will be reduced by 1%. The capacitance can be further decreased by thickening the magnetic layer. Therefore

by adding magnetic layer to power cables

not only it is able to reduce their capacitance which consequently lowers the earth capacitance current

but also the skin effect and eddy current loss are suppressed.