| The pumped storage plant Bath County is situated in a mountainous region in Virginia, USA. The station consists of two large reservoirs – one 385 meters higher than the other, a massive power house and the huge tunnels that connect them.
In order to increase the capacity of the motor-generators, Voith Siemens Hydro experts, using state-of-the-art computerized tests, revealed that in order for the motor-generators to be able to properly handle the performance increase planned for the pump-turbines, changes in the stator winding, the ventilation and cooling system were necessary, while the original stator core could be maintained.
Voith Siemens Hydro designed a completely new stator winding using a 540 degrees transposition instead the original 360 degrees, thus assuring the desired increase in the machines’ maximum capacity from 389 MVA and 447 MVA respectively to an impressive 530 MVA.
Upgrading will be completed in 2008. By then, Bath County will again become the world’s most powerful pumped storage generating station. |
