Siemens Energy has recently been awarded a contract by the EPC Contractor O&G Industries, Inc. to provide a turnkey 345 kV GIS substation for the Kleen Energy 620 MW combined cycle power plant in Connecticut. As the only technology company that provides products and solutions along the entire energy conversion chain, Siemens Energy will also provide the major rotating and plant control equipment for this project under separate contracts. The new power plant required the new substation to tie into existing transmission lines. The GIS substation contract is valued at more than USD26 million.

Siemens will provide five bays of its 8DQ1 345 kV gas insulated switchgear manufactured in Germany. Under this contract, Siemens Energy will engineer, procure and construct the substation, while civil services will be engineered and executed by O&G. The substation is expected to be completed in November 2009 and is expected to be on line two to three weeks thereafter.

In 2008, Siemens was commissioned to supply two SGT6-5000F gas turbines with a nominal capacity of 200 MW each and one SST6-5000F steam turbine (275MW) for the 620 MW combined cycle power plant in Middletown, Connecticut. The turbines are expected to be delivered to the customer site in the first half of 2009. The plant will provide sufficient power to supply approximately 275,000 households with electricity.

Siemens’ high-voltage gas insulated switchgear features a very small footprint as compared to conventional air insulated switchgear, so it is particularly attractive for use in space-constrained areas such as the old quarry that Kleen Energy is repurposing for the substation