Under the development trend of digitalization and intelligence in the power industry,higher requirements are put forward for the construction of smart grid.In order to better meet the electricity demand of the public in the new era and further improve the comprehensive level of power supply of power enterprises,it is necessary to integrate modern power design technology in the design and construction process of smart grid.In view of this,this paper first describes the advantages and performance characteristics of smart grid,and then analyzes the main power design technologies in smart grid at this stage.On this basis,the design and application of intelligent online monitoring system,intelligent feeder automation protection system and smart grid dispatching system supported by power design technology are briefly introduced.The purpose is to provide reference and reference for the effective application of power design technology in smart grid,and promote the modernization and intelligent development of China's power industry.