In view of the power plant that has been in operation for many years, the company, through CFD full-channel hydraulic analysis and calculation, optimizes the design of efficient runners, turbine flow passages and transforms the generator to increase efficiency and capacity of the power plant on the premise of retaining the fixed part of the original power plant. For the sediment-laden power station, the company designs new structure and selects new materials and technology to repair the turbine overflow components to improve the stable operation of the power station, and increases the capacity of generators by improving the insulation level of windings and optimizing the ventilation system. In the aspect of automation, the company greatly improves the safety of plant equipment and personnel as well as economic benefits of the power plant by updating the automation components and related control equipment of units for power plant with low automation