Posted on 30 November 2012 by Katrin Beck, Images by Oyvind Hagen/ Statoil
Five emergency gensets safeguard the power supply to a natural gas processing plant in Norway.
A new generator house built by Statoil according to MTU specifications is the new home for the MTU gensets. Inside it are the five MTU Type 16V 4000 G63 generator engines. Four of them are enough to supply the energy required to run the entire facility in emergency mode after a power outage so that critical systems can be safely shut down. The fifth unit serves as a reserve system. Each of the gensets has a connected load capacity of 2,338kVA and an electrical output of 1,870kW at a frequency of 50Hz and a voltage of 69V. In total, therefore, the four gensets deliver an electrical output of just under 8 MW – enough energy to cover the power requirements of a small European town.
MTU supplied the gensets complete with baseframes and resilient mountings and all necessary system components such as switchgear, fuel tanks and ventilation systems. Five flatbed radiators with very low noise levels mounted on the roof of the generator house were also supplied by MTU. Exhaust silencers make sure that as little noise as possible escapes through the exhaust system – which guarantees that the noise levels outside the building are extremely low as well.
Ten seconds to load take-up
The fuel for the gensets is stored in two special tanks supplied by MTU. If the mains power fails, they contain enough fuel to keep four gensets running at full power for up to 17 hours. MTU also supplied the control systems that monitor the emergency power systems and electricity infeed. They issue the start-up command for the emergency backup gensets if there is a grid outage – and they react very quickly. The Norwegian operators demanded that the gensets had to be able to reach their rated output within 15 to 20 seconds. So they are up and running within ten seconds and operating at full power inside a further ten seconds – doing their job quietly and reliably so that the gas never stops flowing from the middle of nowhere in Norway.