Refurbishment and Expansion of the Hydropower Plant ArgessIMO, Switzerland

The refurbishment and expansion of the ArgessIMO Hydropower Plant comprised, among other tasks, the development of the Illsee-Oberems Hydropower Plant into a pumped storage plant with a maximum installed capacity of 180 MW.

ClientNordostschweizerische Kraftwerke AG (NOK), Baden
LocationSwitzerland
Services Period2007 – 2008
Technical Data
  • Pump turbine:
2 stage
  • Impeller diameter:
3.08 m
  • Max. capacity - turbine operation:
180 MW
  • Max. capacity - pump operation:
180 MW
  • Max. water head:
999 m
  • Min. water head:
938 m
  • Nominal rotation speed of pump- turbine: 
600 rpm
Asynchronous-motor-generator 
  • Apparent output:
200 MVA
  • Variation of speed:
± 6%
  • Upper reservoir volume:
6.50 x 106 m3
  • Lower reservoir volume:
0.43 x 106 m3
Services
  • Feasibility study with various project concepts
  • Tender documents for the electromechanical equipment
  • Modelling of central layout for the mechanical variants
  • Concepts of field job site logistic and development
  • Specification of hydraulic calculations

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