This article introduces the 110 kV smart substation project for the wind power generation center in Zhangjiakou, and analyses the technical features and implementation schemes. The main technical innovations are also introduced, which include combination of smart terminal and the primary equipment, simplification of the secondary circuit within switch, installation on the switchyard of the process-lelvel equipment, information shareing based on generic object oriented substation event （GOOSE） networks, and equipment intelligentization of the online monitoring system for the primary equiment, and intelligent control of lighting, ventilation air-condution heating, water supply and drainage within the station through linkage of the production assistance system and the video system.