The corrugated aluminum sheath structure for cross-linked polyethylene (XLPE) high-voltage cables is generally adopted in China. However

the parameter calculation of electrical performance of existing cable is mainly based on a smooth sheath structure without considering the influence of the corrugated sheath. In this paper

the electric filed distribution and leakage current of the buffer layer under the corrugated sheath structure is analyzed from the electric field distribution and based on the finite element method

so to analyze the induced voltage of the sheath

power frequency capacitance and inductance of the cable and compare the influence of smooth sheath and the corrugated sheath structure on the above tow sets of electrical parameters. At the same time

the formula method is used for calculation of the cable with the smooth sheath cable and as the the comparison of the finite element analysis result. The result shows that the corrugated sheath structure can cause electric field concentration of sphere gap and increase of leakage current

the corrugated aluminum sheath structure can reduce the sheath induced voltage about 10% and increase the inductance about 4%

while its influence on the power frequency capacitance is only 0.5%. The calculation result in this paper helps more accurate electrical modelling for power cable.