The application of flywheel energy storage in steel plants or ports has important demonstration significance, which can greatly promote the smart and green development of each port and play a positive role in promoting the subsequent application of energy storage in ports. Energy storage technology will become an important technology to meet the busy operation needs of ports and realize energy saving and emission reduction. It is also an important measure to build a "green port" and improve the competitiveness of docks. It is also an important measure to build a harmonious urban area, improve the environmental quality of the port area and coordinate the development of the port and the city, which has great social benefits.