Abstract：The circulating current of metal sheath in high voltage cable is the superposition of induced current

component and leakage current component. At present，the calculation of induced current component is relatively

mature，but the calculation of leakage current component is insufficient，which affects the final circulating current

calculation result and the related fault diagnosis effect. For this reason，a calculation method for leakage current

component of sheath circulating current in high voltage cable was proposed. Based on the π-type equivalent circuit

of "core—sheath"，an equivalent circuit for solving leakage current component of sheath circulating current was

established，which take into account the shunting effect of leakage current and circulating current generated by

leakage current of cable core. The final leakage current component was obtained based on the iterative method. A

cable model with a linear arrangement was built using ATP-EMTP software. The results show that the relative

deviation between calculation result and simulation value of this method is within 2% under different length

combinations and load currents，compared with existing method，the accuracy is greatly improved. This method

can better explain the reason of excessive circulating current at light load，and has a certain reference for the

generation of sample data for fault diagnosis of cross-connected systems.

      Key words：high voltage cable；cross-bonding；circulating current of sheath；induced current component；

leakage current component