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# Application for the Loss of Generator Gas Supply - New York CityOC Meeting – May 12, 20112 

# Existing ApplicationsDuring the Summer 2010 period, the existingapplications of the NYSRC “Gas burning procedure –NYC” requires certain In-City units to burn oil at aminimum level, based on the forecasted system loadas follows:3⁄4At NYISO forecasted "NYC - Zone J" load above 7,850 MW (equivalentCon Edison forecasted electric system loads above 9,000 MW) duringthe Summer Capability Period, “minimum oil burn/automatic fuelswapping capability” is required in one ofthe Astoria 138 kV units (3, 4,or 5) connected to the Astoria West bus or NYPA CC1/2.3⁄4At NYISO forecasted "NYC - Zone J"load above 8,275 MW (Con Edisonforecasted electric system loads above 9,500 MW) during the SummerCapabilityPeriod, “minimum oil burn/automatic fuel swappingcapability” is required in two ofthe following units with one unitconnected to the Astoria East bus and the other connected to theAstoria West bus: Astoria 138 kV units(3,4,or 5), Astoria Energy, NYPACC1/2.3 

# Existing Applications

(continued)3⁄4At NYISO forecasted "NYC - ZoneJ" load above 8,700 MW (ConEdison forecasted electric system loads above 10,000 MW) duringthe Summer CapabilityPeriod, additional "minimum oil burncapability" is required in oneRavenswood (1,2,3) generatingfacility.3⁄4At NYISO forecasted "NYC - ZoneJ" load above 9,575 MWforecasted (Con Edison forecastedelectric system loads above11,000 MW) during the Summer Capability Period, one East Riverunit, ER 6 or 7, must be on “minimum oil burn”.3⁄4At NYISO forecasted "NYC - ZoneJ" load above 10,000 MW (ConEdison forecasted electric system loads above 11,500 MW) duringthe Summer Capability Period, the Astoria Energy and NYPACC1/CC2 generating facilities mustbe on “automatic fuel swappingcapability“ and Astoria 4 and 5, Ravenswood 1or 2, Ravenswood 3and East River 6 and 7 generating facilities must all be on“minimum oil burn”.4



# The StudyCon Edison conducted a study to verify therequirements of the application for the Summer 2011capability period.Study reflects several changes to the Con Edisonsystem for Summer 2011:3⁄4The addition of Astoria Energy II – Increases “in city”generation by 500 MW.3⁄4The addition of 345kV Feeder M29 between Sprain Brook andAcademy 345 kV Substations.This year study is contingent upon Astoria Energy IIbeing commercial by the start of the summer period, ifnot then 2010 study results will take precedent.The study and its findings have been presented to theNYISO for review and approval.5



# The Study ResultsThe electric studies will change the existingapplications of the NYSRC Gas burning procedure tothe following for the Summer of 2011:3⁄4At NYISO forecasted "NYC -Zone J" load above 7,850 MW(equivalent Con Edison forecastedelectric system loads above9,000 MW) during the Summer Capability Period, “minimum oilburn/automatic fuel swapping capability” is required in AstoriaEnergy II and in either oneof the Astoria 138 kV Steam generatingfacility (Ast. 3, 4, or 5) connected to the Astoria West bus or NYPACC1/CC2.3⁄4At NYISO forecasted "NYC - ZoneJ" load above 8,275 MW (ConEdison forecasted electric system loads above 9,500 MW) during theSummer Capability Period, along with the designated plants statedat the previous load level, “minimum oil burn/automatic fuelswapping capability” in either oneof the Astoria 138 kV Steamgenerating facility (Ast, 3, 4, or 5)connected to the Astoria East busor Astoria Energy I.6 

# The Study Results (Continued)3⁄4At NYISO forecasted "NYC -Zone J" load above 9,575 MWforecasted (Con Edison forecasted electric system loads above11,000 MW) during the Summer Capability Period, along with thedesignated plants stated at the previous load level, one East Rivergenerating facility, either ER 6or 7, must be on “minimum oilburn”.3⁄4At NYISO forecasted "NYC - ZoneJ" load above 10,000 MW (ConEdison forecasted electric system loads above 11,500 MW) duringthe Summer Capability Period, along with the designated plantsstated at the previous load level, one Ravenswood generatingfacility (either Rav 1 or 2) must be on “minimum oil burn”.7 

# The Study Results (Continued)•At NYISO forecasted "NYC - ZoneJ" load above 10,450 MW (ConEdison forecasted electric system loads above 12,000 MW) duringthe Summer Capability Period, along with the designated plantsstated at the previous load level, one Astoria Steam generatingfacility (either Ast. 3, 4 or 5)must be on “minimum oil burn” andconnected to the Astoria West Bus.•At NYISO forecasted "NYC - ZoneJ" load above 11,310 MW (ConEdison forecasted electric system loads above 13,000 MW) duringthe Summer Capability Period, all dispatched duel fuel units mustbe on “minimum oil burn/automatic fuel swapping capability”(Ravenswood 1, 2 & 3, Astoria 3, 4& 5, Astoria Energy I & II, EastRiver 6 & 7 and NYPA CC1/CC2)8 

# The Study ConclusionThe number of generators required to be onminimum oil burn has decreased as a result of therevised study assumptions. Application No. 69 willchange to reflect these results.9 

# Our RecommendationCon Edison recommends that a revision toApplication No. 69 reflecting these updatedsummer capability period requirements beaccepted by the Operating Committee forimplementation.