Abstract: Abstract:The advantages and disadvantages of the low resistance grounding mode were analyzed. The several common low resistance grounding modes were described. The protection configuration scheme of main electric equipments of the current collection line and the setting principle of the protection were expounded. Aiming at common problems in engineering application, relevant countermeasures were proposed, and the further research direction was prospected.

Key words: Keywords:wind farm, low resistance grounding system, relay protection scheme, engineering application, common problem