TC Ravenswood LLC, a unit of TransCanada, filed a Dec. 12 notice with the New York State Public Service Commission that it plans to mothball the 22-MW (nameplate) GT-7 unit.
The company also provided notice to the New York Independent System Operator, Consolidated Edison Co. of New York and the New York State Reliability Council that it intends to mothball GT-7 on or before March 13, 2014.
“GT-7 commenced operations in 1970,” the notice said. “Over the past 18 months, several operational and maintenance issues have occurred. Most recently, beginning on July 10, 2013, the unit was forced offline due to a generator rotor ground. In addition, the unit experienced an over speed condition and began having high vibration issues. Ultimately, a boroscope inspection revealed the unit also has failed bolts in the turbine rotor first stage section. Other latent damage may exist.”
TC Ravenswood said it does not anticipate repairing the unit at this time and accordingly intends to mothball it. Should circumstances change, it will again notify all the parties to the Dec. 12 notice.
Ravenswood, located in Queens, N.Y., is an oil- and gas-fired facility with a capacity of 2,480 MW. The GenerationHub database shows a number of gas turbine units at the plant, with GT-7 being among the smallest.