NOTICE DATE: November 6, 2012 NOTICE TYPE: M-B110612-01 NPRR SHORT DESCRIPTION: Implementation details for NPRR377 INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: December 6, 2012 LONG DESCRIPTION: On December 6, 2012, ERCOT will implement Nodal Protocol Revision Request (NPRR) 377, Alternate Inputs to Base Point Deviation Charge, which was approved by the ERCOT Board on December 12, 2011. NPRR377 will result in multiple settlement changes with a planned production migration date of December 6, 2012. These changes will take effect on that same Operating Day. Settlement impacts include the addition of new bill determinants in the Base Point Deviation Charge. 1. New bill determinant indicating a Resource has over generated (OGEN) BPDAMT q, r, p, i = Max (PR1, RTSPP p, i) * OGEN q, r, p, i OGEN q, r, p, i = Max[0, (TWTGq, r, p, i - ¼ * Max(((1 + K1) * AABP q, r, p, i), (AABP q, r, p, i + Q1)))] 2. New bill determinant indicating a Resource has under generated (UGEN) BPDAMT q, r, p, i = -1 * Min (PR2, RTSPPp,i) * Min (1, KP) * UGEN q, r, p, i UGEN q, r, p, i = Max [0, [Min ((1 - K2) * ¼* AABP q, r, p, i ), ¼ * (AABP q, r, p, i - Q2) - TWTGq, r, p, i]] 3. New bill determinant indicating an IRR Resource has over generated (OGENIRR) BPDAMT q, r, p, i = Max (PR1, RTSPP p, i) * OGENIRR q, r, p, i, OGENIRR q, r, p, i = Max [0, TWTG q, r, p, i - ¼ * AABP q, r, p, i * (1 + KIRR)] 4. Discontinue use of exemption bill determinant "SHORTSCEDFLAG" 5. New calculation of bill determinant (AABP). Using new bill determinants (AVGBP) and (AVGREG) AABP q, r, p, i = AVGBP q, r, p, i + AVGREG q, r, p, i ACTION REQUIRED: Implement changes to shadow settlement systems in compliance with NPRR377. ADDITIONAL INFORMATION: New Settlement Bill Determinants: The following new bill determinants will be implemented for NPRR377: Bill Determinant Short Description Extract Extract Table OGEN Over Generation Volumes per QSE per Settlement Point per Resource-The amount over-generated by the Generation Resource r represented by QSE q at Resource Node p for the 15- minute Settlement Interval i. RTM CODE RTMOUTPUTHEADER RTMOUTPUTINTERVAL UGEN Under Generation Volumes per QSE per Settlement Point per Resource-The amount under-generated by the Generation Resource r represented by QSE q at Resource Node p for the 15-minute Settlement Interval i. RTM CODE RTMOUTPUTHEADER RTMOUTPUTINTERVAL OGENIRR Over Generation Volumes per QSE per Settlement Point per IRR Generation Resource-The amount over generated by the IRR r represented by QSE q at Resource Node p for the 15-minute Settlement Interval i. RTM CODE RTMOUTPUTHEADER RTMOUTPUTINTERVAL AABP Adjusted Aggregated Base Point per QSE per Settlement Point per Resource. SID & RTM CODE MKTINPUTHEADER MKTINPUTINTERVAL AVGBP Average Base Point per QSE per Settlement Point per Resource. Average 5 min clock interval over the 15 minute Settlement Interval. SID & RTM CODE MKTINPUTHEADER MKTINPUTINTERVAL AVGREG Average Regulation Instruction per QSE per Settlement Point per Resource. Average 5 min clock interval over the 15 minute Settlement Interval. SID & RTM CODE MKTINPUTHEADER MKTINPUTINTERVAL Pursuant to 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. Draft DDLs and XSDs for NPRR377 can be found on the ERCOT website, under Services, at http://www.ercot.com/services/mdt. NPRR377 and associated documents can be found on the ERCOT website, under Market Rules, at http://www.ercot.com/mktrules/issues/nprr/376-400/377/index. Information on upcoming releases can be found on the ERCOT Multi Year Project Priority List (PPL) at http://www.ercot.com/services/projects/. 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]>. If you are receiving email from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com. dh