The Federal Energy Regulatory Commission on Dec. 22 accepted a Nov. 9 filing by Arizona Public Service Co. of a Large Generator Interconnection Agreement between APS Transmission and APS Fossil for an addition to the Ocotillo power plant.
This agreement covers construction of the facilities needed to interconnect a 595-MW combustion turbine facility to the APS system at the Ocotillo Substation. The project will physically connect four of the five combustion turbine units to the Ocotillo 230-kV bus through two 230-kV generator interconnection tie lines. The fifth combustion turbine unit will interconnect to the Ocotillo 69-kV bus through a 69-kV interconnection tie line. The Point of Interconnection (POI) for this project will therefore be at both the Ocotillo 230-kV and 69-kV busses within the Ocotillo Substation.
Arizona Public Service’s Ocotillo Modernization Project is due for commercial operation under this agreement on Oct. 31, 2018.
Says the APS project website: “APS is planning to modernize the Ocotillo Power Plant in Tempe. The proposed project will create a cleaner-running, more efficient plant using advanced technology. APS intends to install five combustion turbines powered by natural gas. Two existing 1960s-era units will be removed. The project is critical to the Phoenix metro area and provides several benefits. It supports service reliability, improves the plant’s appearance, is better for the environment, creates construction jobs and adds additional tax revenue to the local economy.”