Long-term operation has aged many of the hydroelectric power plants. It is effective to renovate them using the methods best fit for each power plant. We will investigate and review each plant and will make a renovation proposal on the basis of the latest technologies. The following section highlights the benefits of this renovation.
Improvement of efficiency and energy saving
Improvement of reliability and maintainability
Environmental harmony
Renewal of the guide vane to an electric operating design
Replacement of the thrust bearings for a vertical shaft type generator
Renewal of the thrust bearing to the latest design based on the new material technologies
Renewal of the brake to an electromagnetic design
Multi-function type digital relay (MG80S2-C03)

Applications

With changes in operating conditions or water flow conditions since the time of construction, hydraulic turbine performance might have become ineffective. We review the current operating and flow conditions in detail and propose a replacement to a newly designed and most effective turbine runner to improve the performance and hence increase the power output.
For small and medium capacity generators, we propose to replace the entire stator assembly, including the coils, iron core, and stator frame, with a new assembly produced under a wholly-impregnated resin insulation method. The wholly-impregnated resin insulation method has an excellent humidity resistance, long heat resistant life, and excellent insulation characteristics without a seam in the coil insulation layer.