Motor Generators for Energy Efficiency

• Motor-generator technology by Voith – including excita- tion, static frequency converters (SFC) and SCADA systems.
• Well advanced and proven VPI insulation system for optimized design for Class 155 according IEC (formerly Class F) and voltages up to 27 kV.
• Motor-generators are air-cooled by RIM-Ventilation or forced ventilated or direct water-cooling of stator or stator and rotor windings and also stator core.
• Magnetic thrust bearings for reduced torque during pump starts and reduced bearing losses during normal operation.
• Comprehensive system for automation of power station complex as a whole including monitoring, remote supervisory control and data acquisition of the plant with fiber optic cable as required, for control and station networks.
• Static frequency converter systems composed of computer duplex digital controller and optical thyristor of high resistance voltage for high performance and easy maintenance.

Asynchronous motor-generators
With the use of an asynchronous motor-generator the rotational speed of the pump-turbine can be varied. Thus, the pump capacity can be adjusted to using just the currently available amount of energy. This allows for a highly efficient stabilization of the grid.