The configuration of the feed water pump has a great influence on the economic and stability of the operation of the thermal power unit. In order to obtain the configuration plan with the best comprehensive economic performance and reliability

based on the investigation of the current situation of the feed pump configuration of 1 000 MW ultra-supercritical units in the domestic and international countries

the feasibility

operational stability and reliability of different configurations of the feed pump are analyzed

and the corresponding initial investment and operating costs are calculated and compared. The results show that the best configuration plan of the feedwater pump is to adopt a steam-driven feedwater pump unit with a capacity of 2×50%

the front pump and the main pump coaxially

and a total of two units with a 30% capacity electric start fixed-speed feedwater pump. The program has the least operating cost and the best reliability

and at the same time

the initial investment increase is small.