The UHV channel project starts at the Zhangbei 1000kV substation and ends at the Shengli 1000kV substation in Inner Mongolia, and will build a 1000kV double-circuit line with a total length of 140 kilometers. Zhang Bei to victory in uhv engineering is a national key project of "difference" electric power development planning, with a total investment of 6.786 billion yuan. The project starts in Zhangjiakou, Hebei Province and ends in Xilin Hot, Inner Mongolia. The total length of the transmission line is 732 kilometers, and three UHV substations will be expanded, with a new capacity of 9 million kVA