This report provides a summary of the energy offered and transacted for the Day-ahead Market (DAM) in New York. More than 90% of the energy traded in the NYISO wholesale energy market occurs in the DAM. The remainder is conducted in the real-time market, where adjustments are made for conditions that occur within the day. The report is currently issued Monday through Friday and is intended for use by our Customers and Market Participants. The weather-adjusted forecast of the expected energy load or consumption for the day as determined by the NYISO. The forecast energy consumption as submitted by NYISO Customers. For informational purposes, the percentage difference between the Customer and NYISO load forecasts is provided. The amount of load Customers will procure in the DAM at the location based marginal price (LBMP). Customers may choose to bid more or less than their load forecast with any excess or shortage being settled in the real-time market. All load bids offered within New York are automatically scheduled by NYISO. 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 allows customers to set limits on the amount they are willing to pay for their energy. Customers can also choose to buy more energy if the price is lower. These load bids consist of price capped loads at internal NYCA bus specific locations and at the external proxy buses. The proxy bus loads are also considered exports. 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 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. The Daily Energy Report also includes a graph of the DAM Marginal Cost of Energy that shows the base price of energy for New York during each hour of the day. This price does not include the marginal cost of electrical losses or congestion that may occur since these quantities are location dependent. The zonal and generator locational-based marginal prices (LBMPs) do include these components and these values may be found on the OASIS section of the web site. The Marginal Cost of Energy by definition is determined at the NYISO reference bus, so named because it is the reference against which losses, congestion, shift factors, penalty factors and other system mathematical quantities are calculated. It is physically located at the Marcy 345 kV substation in Marcy, New York.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.
Daily Energy Report - Day Ahead Market (DAM)
Date: 04/12/2003

MWh Percent
NYISO Load Forecast 377187
Customer Load Forecast 435320 15.4%

Offered MWh Scheduled MWh Percent
Load Bids 159114 159114
Bilateral Bids 170600 170600
Price Capped Load Bids 115524 42994 37.2%

Total Load 445238 372708 83.7%
Total Peak Load 317054 264765 83.5%
Total Non Peak Load 128184 107943 84.2%

Generation Bids 579822 318735 55.0%

Imports 134491 54695 40.7%
Exports 12831 6431 50.1%

Net Imports/(Exports) 121660 48264 39.7%
Wheel Throughs 14683 13001 88.5%