The advanced 700 ℃ ultra supercritical (A-USC) power generation technology can dramatically enhance the power generating efficiency of the units

realize energy conservation and emission reduction

which has great strategic significance.The key problems need to be solved during developing the 700 ℃ A-USC technology were presented and analysed in this paper

including the preparation of high temperature alloy materials

manufacturing of key high temperature components for boilers and steam turbines

manufacturing of high temperature valves

actual furnace verification test for high temperature materials and key components

and design/building/operation of 700 ℃ A-USC demonstration power stations.Currently

the research and development of domestic 700 ℃ A-USC technology in accordance with the plan steadily

which has already obtained phased progress in aspects of preparation of nickel-based high temperature materials

production of key components

main equipment scheme study

and construction of key components' verification platform.Developing the 700 ℃A-USC technology will greatly promote the development of China's industrial materials

electric power industry and equipment manufacturing industry