At present, the settlement of protective equipment in the switchyard of substation has widely been adopted in power systems because of economy.

• 目前,由于经济原因保护设备下放已逐渐在电力系统推广、应用,这对日渐趋向于小型、紧凑、智能和集成化的微机保护装置的抗干扰能力提出了新的挑战。