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Posted by Energetic
The nominal electrical power of block I, in service since 1976, is 840 megawatts. The 50 Hz three phase AC power is 567 megawatts and for the 16.7 Hz traction current power 174 MW. The traction current generator is the world's largest electrical generator for single phase AC. The generator block 1 is rated 21,000 volts at a current of 27,000 amperes, and the traction current generator is rated 14,500 volts and a current of 12,000 amperes. The current produced by the generators is stepped up to 220 kilovolts (three-phase alternating current) and/or 110 kilovolts (traction current) with the machine transformers. Block I is the only nuclear power station which produces traction current.
The nominal electrical power of block 2, in service since 1988, is 1400 megawatts. The generator produces 50 Hz three-phase alternating current with a voltage of 27,000 V and a current of 35,000 amperes. Unlike Unit 1, no dedicated traction current generation takes place, but some of the power produced is converted at the traction current substation. This is transmitted through the 380 kV generator transformer block of the II and the 380 kV-machine transformer of the motor-generator sets.
The GKN station also has a 16.7 Hz traction current converter plant. The traction converter plant at Neckarwestheim, which is situated close to the switchgear of block II, has two identical sets, consisting of a three-phase 50 Hz AC motor with 12 poles and a four pole single phase 16.7 Hz AC synchronous generator. The rated voltage of the three-phase AC asynchronous machine and the traction current machine is 12.5 kV. The set has a length of 17.5 meters and a maximum width of 7 meters. The nominal power rating for each set is 70 megawatts, which are the largest traction current motor-generator sets ever built. The traction current converter plant feeds the 110 kV balanced line traction power network through appropriate transformers. Power can be transferred from the Block II nuclear generator over the 380 kV transmission network.
Dimensions of the reinforced concrete building are:
The traction current lines from the GKN to the traction current switching station at Neckarwestheim, and from there to the central substation in Stuttgart Zazenhausen, are implemented as four-bundle conductors.
The three-phase 380 kV circuit leading away from the nuclear power station GKN 2 runs past the 220 kV-three phase switchyard at Neckarwestheim to the transformer station at Großgartach near Heilbronn. To the GKN also runs another 110 kV-line for three phase AC with one circuit, which originates in the switchgear of the coal fired power station at Walheim. This line is not for transport of the power produced by the GKN, but for start-up power for the nuclear plant.
It is also notable that Neckarwestheim and the GKN never had a track connection to the railway network.
|Neckarwestheim Nuclear Power Plant|
|Commission date||May 26, 1976|
|Reactors operational||2 reactors|
|Power generation information|
|Installed capacity||2,235 MW|
|Annual generation||17,060 GW·h|
|Net generation||354,779 GW·h|