VB1 generator switchgear for Goldisthal pumped-storage Power Plant - Germany
VB1 generator switchgear for Goldisthal pumped-storage Power Plant - Germany
Power Utilities
Vattenfall (Deutschland) GmbH
Berlin Germany
Renewal
of maintenance-intensive SF6 circuit-breakers (72.5 kV) for the direct
converter of pump-storage plants A and D. Additionally, the replacement of
generator breaker switchgear for the start-up converters in the North and
South.
Challenges
Further use of existing breaker cells, connection points and current cables for the inverters
Installation of two new units under limited space conditions for the starting inverters
Control of the recovery voltage (peak 55 kVp)
Solution
In total 8 vacuum circuit-breakers type 3AH4 (24 kV, 2500 A, 40 kA) have been installed including spare circuit-breakers for the inverters.
Installation of two VB1 generator switchgears with totally 7 vacuum circuit-breakers type 3AH4 (24 kV, 2500 A, 40 kA) under limited space conditions.
Increased service life of the circuit-breaker (min. 30.000 operating cycles)
Minimizing of maintenance and reconstruction costs because of using the 3AH4 circuit-breaker
Seamless integration in existing building, primary and secondary technology
The Goldisthal pumped-storage Station is a pumped-storage power plant in the Thüringer Mountains at the upper run of the river Schwarza in Goldisthal, Germany. It was constructed between 1997 and 2004. It has an installed capacity of 1,060 megawatts (1,420,000 hp), making it the largest hydroelectric power plant in Germany and one of the largest in Europe.
