Toshiba Corp. (TOKYO: 6502) said March 24 that it has received an order to supply a 472-MW steam turbine and generator (STG) for the Allen Combined Cycle Power Plant being constructed by the Tennessee Valley Authority in Tennessee.
The STG will be delivered in October 2016, and the new gas-fired plant is scheduled to come on line in June 2018. TVA is shutting coal capacity at this site in favor of cleaner gas-fired generation.
The plant, a combined cycle power plant that improves generating efficiency by deploying both gas turbines and a steam turbine, is being constructed to comply with state and federal clean air act agreements. With this order, Toshiba said it reached the milestone of a cumulative total for 100 orders for STG in North America. Toshiba supplied its first steam turbine to North America in 1967. In 2014, construction of combined cycle power plants increased to replace existing coal-fired power plants, and Toshiba said it again won the top share of orders for STGs.
General Electric (NYSE: GE) said Jan. 15 that it has won the business to supply gas turbines for this project. GE said that it has received an order from the TVA to supply two high-efficiency 7HA.02 gas turbine generators.
The new plant will replace three coal-fired units that are being retired as TVA works toward a December 2018 deadline from the U.S. Environmental Protection Agency to reduce coal-fired emissions. The repowered TVA Allen plant will have the capacity to generate 1,000 MW in combined-cycle mode. The gas turbines are expected to be delivered to the site in August 2016.
The TVA board of directors in August 2014 approved replacing the coal-fired Allen plant. Allen has three coal-fired units with a nominal maximum rating of 330 MW each. The board authorized up to $975m to build a gas plant with a capacity of approximately 1,000 MW.
The gas-fired plant will be built across Plant Road from the existing coal plant. Memphis Light, Gas and Water will build the pipeline that will supply natural gas to the plant’s two combustion turbines.