The laying distance of cable of one 500 kV substation to the adjacent single set of reactor meets five-pass requirement of State Grid Corporation of China (SGCC). However

in recent years

the current of the armor layer grounding wire on both ends of cable has increased abnormally and caused abnormal heat. In view of this problem

the electromagnetic field model of cable armor layer and adjacent three-phase reactor is set up

the finite element numerical calculation method is used to analyze the influence of leakage magnetic field of three-phase reactor on abnormal current of the grounding wire of cable based on the field-circuit coupling. The the calculation result of the current of the grounding wire is close to the actually measured result

which verifies the correctness of the simulation model and method and

on this basis

the influence of phase number of reactor

the laying distance and burial depth of the cable on current of the grounding wire of armor layer of cable

providing theoretical guidance for the laying of cable around three-phase reactors in substations.