The Tennessee Valley Authority (TVA) has begun commercial operation of the natural gas–fired 880-MW John Sevier Combined Cycle Plant, located near Rogersville, Tenn. (Figure 5). Built near the utility’s John Sevier coal-fired plant—where two of the four units will be retired and two units idled at the end of this year—the publically owned company said the combined cycle gas turbine (CCGT) plant was completed a month ahead of schedule and about $30 million under budget. It is only the second new generation site developed by TVA since 2002 and is TVA’s fifth combined cycle plant.
|5. The newest member of TVA’s fleet. The Tennessee Valley Authority (TVA) started up its new 880-MW John Sevier Combined Cycle Plant in April. The first cycle of the combined cycle plant uses three combustion turbines. The plant is the second new one built by TVA since 2002. Source: TVA|
The first cycle of the combined cycle plant uses three combustion turbines. Heat from the turbines’ exhaust is captured in a secondary system to produce steam that is sent to a steam turbine, which generates additional electricity. “During start-up and testing the plant proved consistent and reliable in its electricity production, meaning it is going to be a dependable addition to our generating fleet,” said Bob Dalrymple, vice president of TVA’s gas generation fleet. “It serves a critical role in TVA’s transmission system in northeast Tennessee.”
—Sonal Patel is POWER’s senior writer.