Local mines in Queensland, Australia are to benefit from power produced by an off-grid combined cycle power plant.

The Diamantina power plant at Mount Isa comprises two combined cycle power blocks able to run at in excess of 50% efficiency. It is owned and will be operated by Diamantina Power Station Pty Ltd, a joint venture between APA Group and AGL Energy Ltd.

Total installed capacity is 242 MW set out as two blocks of 121 MW. Siemens was responsible for the overall plant design, as well as technical advisory services through construction and commissioning.
Its scope of supply included two power islands consisting of two SGT-800 gas turbines and two heat-recovery steam generators with diverter dampers – both supplied by NEM Energy b.v. – as well as one SST-400 steam turbine connected to the local grid via 132kV electrical switchyard.

“Diamantina power plant is a great example of our ecofriendly power generation solutions for island off-grid operation matching the variable power demand of the adjacent copper mine,” said Erling Bruun, Head of Industrial Power Plant Solutions in Siemens Power and Gas Division.