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NOTICE DATE: May 18, 2018
NOTICE TYPE: W-A050718-02 NPRR
SHORT DESCRIPTION: Reminder - Implementation details of NPRR768 and OBDRR002
INTENDED AUDIENCE: ERCOT Market Participants
DAY AFFECTED: May 31, 2018
LONG DESCRIPTION: On May 31, 2018, ERCOT will be implementing Nodal Protocol Revision Request (NPRR) 768, Revisions to Real-Time On-Line Reliability Deployment Price Adder Categories, and Other Binding Document Revision Request (OBDRR) 002, ORDC OBD Revisions for PUCT Project 47199. These changes will impact multiple systems: Market Management System (MMS), Energy Management System (EMS), Current Day Reports (CDR), and Market Information System (MIS) reports.
NPRR768 will make the following changes to Security-Constrained Economic Dispatch (SCED):
********* SCED will use the following logic to process Direct Current Tie (DC Tie) imports or energy delivered to ERCOT through registered Block Load Transfers (BLTs) during an Energy Emergency Alert (EEA) and emergency DC Tie exports and emergency energy delivered from ERCOT through registered BLTs information as a net input to the Real Time Reliability Deployment Price Adder (RTRDPA) pricing run:
o Add the MW from Real-Time DC Tie imports, where the total adjustment shall not exceed 1250 MW in a single interval, during an EEA to Generation To Be Dispatched (GTBD).
o Subtract the MW from Real-Time DC Tie exports to address emergency conditions in the receiving electric grid from GTBD.
o Add the MW from energy delivered to ERCOT through registered BLTs during an EEA to GTBD.
o Subtract the MW from energy delivered from ERCOT to another power pool through registered BLTs during emergency conditions in the receiving electric grid from GTBD.
OBDRR002 will make the following changes to SCED:
********* The SCED Operating Reserve Demand Curve (ORDC) methodology will use the final ONRUC units determined by SCED, and included in the RTRDPA pricing run, to adjust the inputs to the On-Line and Off-Line reserves.
o The High Sustained Limit (HSL) of the ONRUC Resource, and the Reliability-Must Run (RMR) Resource if On-Line, will be removed from the On-Line reserves (RTOLCAP).
o Additionally, if the Reliability Unit Commitment (RUC) Resource prior to the RUC commitment would have qualified for inclusion in the cold start thirty minute reserves in the Off-Line reserves (RTOFFCAP), then that HSL will be returned to contribute to the RTOFFCAP.
Note that the above adjustments will also be included in the Look-Ahead SCED (LASCED) logic.
The EMS will publish the following values through Inter-Control Center Communications Protocol (ICCP) with other existing Reliability Deployment Price Adder information:
********* Total Emergency DCTIE MW
********* Total Emergency BLT MW
Reporting Changes:
NP6-325-CD RTD Indicative ORDC and Reliability Deployment Price Adders and Reserves (Report ID 13222)
********* Column Additions:
o RTDCTIEIMPORT
o RTDCTIEEXPORT
o RTBLTIMPORT
o RTBLTEXPORT
NP6-323-CD Real-Time ORDC and Reliability Deployment Price Adders and Reserves by SCED Interval (Report ID 13221)
********* Columns Removals:
o RTOFF10
o RTOFF30
********* Columns Additions:
o RTDCTIEIMPORT
o RTDCTIEEXPORT
o RTBLTIMPORT
o RTBLTEXPORT
o RTRUCCST30HSL
NP6-792-ER Historical Real-Time ORDC and Reliability Deployment Price Adders and Reserves (Report ID 13231)
********* Columns Removals:
o RTOFF10
o RTOFF30
********* Columns Additions:
o RTDCTIEIMPORT
o RTDCTIEEXPORT
o RTBLTIMPORT
o RTBLTEXPORT
o RTRUCCST30HSL
During the release of these changes, there will be a period of time on May 30 during which some of these column changes are reflected in the reports but not yet being populated with information.
ADDITIONAL INFORMATION: Pursuant to Nodal Protocol Section 21.6, Nodal Protocol Revision Implementation, ERCOT is required to provide notice as soon as practicable, but no later than ten days prior to implementation.
NPRR768<http://www.ercot.com/mktrules/issues/NPRR768> and OBDRR002<http://www.ercot.com/mktrules/issues/OBDRR002> and associated documents can be found on the ERCOT website.
CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask]<mailto:[log in to unmask]>.
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