ERCOT Board Approves Operating Reserve Demand Curve NPRR

ERCOT issued a market notice with implementation details for NPRR568, Real-Time Reserve Price Adder Based on Operating Reserve Demand Curve, which was approved by the ERCOT Board on November 19, 2013

Specifically, starting with Operating Day November 20, 2013, ERCOT will begin posting the indicative Real-Time On-Line and Off-Line Reserve Price Adders required by the Operating Reserve Demand Curve NPRR.

The posted adders will be calculated based on phase 1 of NPRR568, and will therefore include only the inputs currently available in ERCOT systems (i.e., excluding RTOFF10 and RTOFF30 telemetry points). The posting will also contain the variable inputs to the On-Line and Off-Line reserves.

There are two Market Information System (MIS) Public reports associated with this posting:

1. Real-Time Reserve Price Adder Based on ORDC – Interim

2. Real-Time Reserve Price Adder Based on ORDC – Interim Historical Reports

The first report above will provide a .csv file of reserve price adders and underlying inputs to the Real-Time reserve calculations and will be updated every five minutes. Each successive report will include this data set for the current SCED run and all previous SCED runs in the same Operating Day. In the instance where more than one file is displayed, the most current report will have a later timestamp. At the end of each Operating Day, the final posting, which includes all of the SCED runs in the Operating Day, will be posted as the historical report for that Operating Day.

The second report listed above contains historical .csv files for each Operating Day between implementation of this interim posting and the project implementation date, which is anticipated to be June 1, 2014.

"The reports will be available on the Scarcity Pricing Mechanism section of the Real-Time Market page of ERCOT.com. The reports will also be available on the Scarcity Pricing Mechanism portlet on the Real-Time Market page of the Market Information System (MIS)," ERCOT said.