Day-Ahead Energy

What is Day-Ahead Energy?

The Day-Ahead Market clearing process produces a schedule of financially binding commitments for the purchase and/or sale of Day-Ahead Energy in advance of the operating day, based on the bid and offer data submitted to the Day-Ahead Market by Market Participants. The clearing process schedules and dispatches resources using least cost security-constrained unit commitment and dispatch software, such that sufficient generation is scheduled in each hour to serve Energy consumption, while meeting transmission security requirements. The Participant's hourly Day-Ahead Energy credits and charges are calculated by multiplying the net cleared amount of supply or consumption at a location by the LMP for that location, and then summing all locational credits and or charges for the hour. The invoice amount is the net of all hourly credits and/or charges for the billing period.

In what document(s) do I find details about Day-Ahead Energy?

Primary provisions for the settlement of the Day-Ahead Energy Market are included in, but not limited to Market Rule 1 and ISO New England Manual for Market Rule 1 Accounting Manual M-28.

Who can expect to incur a Day-Ahead Energy Credit or Charge?

Credits

Market Participants with a Day-Ahead Generation Obligation will receive credits for this service based upon the location specific Day-Ahead Adjusted Net Interchange and the associated Day-Ahead Locational Marginal Price. Generation Obligation is the sum of cleared generation, cleared incremental offers and cleared imports at the location. The Day-Ahead Adjusted Net Interchange is the net of the Generation Obligation and the Adjusted Load Obligation at the location.

Charges

Market Participants with a Day-Ahead Adjusted Load Obligation will be charged based upon the location specific Day-Ahead Adjusted Net Interchanges and the associated Day-Ahead Locational Marginal Prices. The Adjusted Load Obligation is the sum of cleared demand, cleared decremental bids, and cleared exports, as adjusted for internal bilateral purchases or sales. The Adjusted Net Interchange is the net of the Generation Obligation and Adjusted Load Obligation at the location.

Related Standard Settlements

N/A

Related Billing Adjustments

N/A

Bill Detail

The hourly services bill contains a single line item netting charges and credits entitled "Day-Ahead Energy."

Reports

Day-Ahead Locational Cleared Energy Market Settlement Report

SD_DACLEARED Hourly detail of Participant's cleared generation, cleared demand, and cleared incremental offers and/or decremental bids, issued upon settlement of the Market Day.

Day-Ahead Transaction Activity Report

SD_DATRANSACT Hourly detail of Participant's External Transactions and Internal Bilateral Transactions, issued upon settlement of Market Day.

Day-Ahead Energy Market Locational Settlement Report

SR_DALOCSUM Summary of Participant's hourly Day-Ahead Energy charges and credits by location, issued upon settlement of Market Day.

Day-Ahead Energy Market Summary Report

SR_DACUSTSUM Summary of Participant's hourly Day-Ahead Energy charges and credits, issued upon settlement of Market Day.

Day-Ahead Energy is reported on the SP_EQR report, available on a monthly basis one month after the given settlement, as referenced in the FERC EQR mapping line item Energy Day Ahead.

Daily Financial Position Report

BL_DAILYPOSITION Daily financial position including all market service settlements and miscellaneous billing adjustments generated on a daily basis; and, issued to all active customers registered as a Participant or Non-Participant.

Related Calculation Summary

Energy Market Calculation Summary

Additional Related Materials


ISO News Issue 191 - ISO New England to Release New Daily Financial Position Report

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