The subject of this tender is to supply two new synchronous MotorGenerators (MG) capable of operating at variable speeds, each of which will be fed by a full-size frequency converter. Overall, this involves the modernization of two existing ternary units (TG1 and TG2) to enable variable speed operation with the implementation of a full-size frequency converter and a variable speed synchronous MotorGenerator. The benefit of such modernization lies in the ability to enable pump power control range and to extend the range of turbine power control.