With the arrival of the double carbon era, all industries are in the cycle of green and low-carbon transformation. Power energy is not only a field related to the national economy, people's livelihood and economic development, but also the main battlefield of carbon reduction. Building a new power system with new energy as the main body is one of the most important measures to achieve carbon peak and carbon neutralization. The power grid is the central link of energy transformation and the core hub of carbon emission reduction in whole power system. The smart grid is the only way to achieve "double carbon": to achieve panoramic operation information, networked data transmission, dynamic safety assessment, refined scheduling and decision-making, automation of operation control, coordination and optimization, and to ensure the safe, reliable, flexible operation of the power grid, as well as to ensure the power grid has high quality and efficiency.