Abstract: There are problems of lower efficiency and higher coal consumption rate in the domestic introduced type 300MW steam turbine of Guangzhou Zhujiang Power Plant. The necessity of flow passage reformation for the 300MW introduced type domestic steam turbine was expounded. After reformation, the efficiency of HP cylinder achieves 83.02%; the efficiency of IP cylinder achieves 91.19%; the heat rate is 7990kJ/(kW·h); the gross standard coal consumption rate of the unit decreases by 12.4g/(kW·h); 18 thousands tons of standard coal can be saved in a year. The main control parameters of the steam turbine, the boiler, the generator and auxiliary equipments are all in specified ranges; and the economical efficiency and the safety of the unit are improved significantly. 

Key words: reformation of flow passage, efficiency, coal consumption rate, economical efficiency