These transactions are scheduled directly between a generator and a load, that is, bilateral - between two parties. All bilateral bids offered within NY are also automatically scheduled by NYISO. This is energy brought into New York from neighboring control areas, which include PJM Interconnection, ISO New England, Hydro Quebec and IMO (Ontario). The amount scheduled is determined by price, thus not all that is bid gets scheduled.Energy flowing out of New York to the neighboring control areas. Again price determines how much energy is actually scheduled for export.This is the sum of energy imports less exports. Wheel throughs have no impact on this calculation as their flow in and out nets to zero.The amount of energy purchased in one control area and delivered to another control area, that is, just wheeling through New York.All generating units in New York must submit bids in order to be considered by NYISO. Units are scheduled based on economics and the need to maintain reliable system operation.  This is a summary of gross imports, gross exports and net imports displayed by external control area.
Balancing Market Advisory Summary
Date: 06/12/2010

Offered MWh Scheduled MWh Percent
Bilateral Bids 13420 13420

Generation Bids 541198 358922 66.3%

Imports 78654 77483 98.5%
Exports 27229 25869 95.0%

Net Imports/(Exports) 51425 51614 100.4%
Gross Imports/Exports Summary
Wheel Throughs 2035 2025 99.5%