To study the applicability and feasibility of wind farm 35 kV cable networks neutral grounding methods, and aiming at larger capacitive current to ground level in cable networks, the simulation is made by using MATLAB/Simulink software. This paper takes Long-li wind farm as engineering background and gives operational characteristics under different neutral grounding ways. A modified operation mode based on arc suppression coil is proposed for wind farm 35 kV cable networks. When single-phase grounding fault occurs and the grounding capacitive current is less than 100 A, the medium resistance is switched to suppress the transient over-voltage in the initial period of the fault, the transient grounding fault can be extinguished by compensating arc suppression coil while non-transient grounding fault can be solved through zero sequence current protection. For the case of grounding capacitive current greater than 100 A, the zero sequence current protection device is started by inputting a low resistance to remove non-transient grounding fault timely. Simulation results show that the improved method is adaptable and the related equipment can be selected in accordance with the relevant insulation levels, which has a high operability.