ABB launches a new generator family designed to fit most present doubly-fed turbines. Featuring an enhanced rotor construction and a reliable ABB slip ring design, the generator enables continuous reactive power production and high stability in sudden overspeeds. The new standard series is based on the proven ABB doubly-fed generators since 1997.
The new concept is based on a standard design for 1.5 - 2.0 MW powers enabling fast delivery times. The modular turbine interface connections can be adapted to suit the individual customer´s specifications offering an easy integration to different turbine designs used today. This new generator is also an excellent choice as replacement unit at existing wind parks. Both air or water cooling options are available.
The new patented rotor construction has carbon-fibre winding support rings
New rotor design
Featuring a patented rotor construction with new carbon-fiber winding-end support rings, the generator offers an enhanced overspeed withstand and high cooling performance. The increased insulation level (2,5kV) enables high voltage peak integrity and an easy match with most converters used in different turbines. The new design also offers minimized Total Harmonic Distortion (THD) levels, especially of the 5th and 7th order.
Proven slip ring unit design
The slip ring unit is based on more than half a century of experience in building slip ring motors for many demanding industrial applications. This in-house expertise is combined with specialized know-how provided by leading slip ring manufacturers. The optimized cooling air circulation of the unit ensures continuous operation and reliable reactive power production even during peak loads.
More about the doubly-fed (DF) wind turbine concept
The doubly-fed generator is a wound rotor asynchronous machine with the rotor windings connected to a small converter via slip-rings and brushes. The generator feeds power both from the directly connected stator (approx 2/3 of Pn) and the rotor (approx 1/3 of Pn). The converter enables control of the generator speed, power and power factor, thus giving a wider speed range for power production and providing the ability to feed reactive power to support the grid.