Summary of Nodal Protocol Revisions
Effective: September 1, 2014
Section 1:
NPRR622 – Replace Planning and Operations Information Website References with
MIS
This Nodal Protocol Revision Request (NPRR) replaces references to the
Planning and Operations Information website with the Market Information
System (MIS) location in preparation of the decommissioning of the Planning and
Operations Information website.
Revised Subsection: 1.3.3 [effective upon system implementation of PR006-01,
Planning Site Transition to MIS]
Section 2:
NPRR593 – Clarification of Generic Transmission Limit Posting Requirements
This Nodal Protocol Revision Request (NPRR) creates and defines the term
“Generic Transmission Constraint” (GTC) to distinguish between the
transmission constraint itself and the value of the transmission constraint’s
Generic Transmission Limit (GTL), modifies the definition of GTL to be
consistent with this clarification, and clarifies the posting requirements for GTCs
and GTLs.
Revised Subsections: 2.1 and 2.2
NPRR615 – PVGR Forecasting
This Nodal Protocol Revision Request (NPRR) establishes a definition for ShortTerm PhotoVoltaic Power Forecast (STPPF) and clarifies the use of the resulting
forecast within the Protocols.
Revised Subsections: 2.1 and 2.2 [effective upon system implementation]
NPRR626 – Reliability Deployment Price Adder (formerly “ORDC Price Reversal
Mitigation Enhancements”)
This Nodal Protocol Revision Request (NPRR) mitigates the price
reversal/suppression associated with the deployment of Load Resources and/or
other out-of-market reliability deployments that may inappropriately reduce the
total Real-Time price in times of scarcity.
Revised Subsections: 2.1 and 2.2 [effective upon system implementation]
Section 3:
NPRR593 – Clarification of Generic Transmission Limit Posting Requirements
Page 1 of 6
Summary of Nodal Protocol Revisions
Effective: September 1, 2014
See Section 2 above.
Revised Subsection: 3.10.7.6
NPRR604 – Modification to Submission Timeline for Changes to Emergency
Operations and Weatherization Plans
This Nodal Protocol Revision Request (NPRR) modifies the requirement that
Resource Entities submit any changes to their emergency operations or
weatherization plans within 30 days of such change to only submit twice per year.
Revised Subsection: 3.21
NPRR615 – PVGR Forecasting
See Section 2 above.
Revised Subsections: 3.9.1 and 3.13 [effective upon system implementation]
NPRR624 – Generation Resource Operational Designation Transparency
This Nodal Protocol Revision Request (NPRR) requires ERCOT to send a Market
Notice regarding Generation Resource operational designation changes, and the
posting of a Notification of Suspension of Operations in one additional instance.
Revised Subsection: 3.14.1.9
NPRR626 – Reliability Deployment Price Adder (formerly “ORDC Price Reversal
Mitigation Enhancements”)
See Section 2 above.
Revised Subsections: 3.5.2.1, 3.5.2.2, 3.5.2.3, 3.5.2.4, and 3.5.2.6 [effective upon
system implementation]
Section 4:
NPRR615 – PVGR Forecasting
See Section 2 above.
Revised Subsection: 4.2.3 [effective upon system implementation]
NPRR619 – Minimum Quantity for DAM PTP Obligation Bids
This Nodal Protocol Revision Request (NPRR) adds a one-tenth of one Megawatt
(MW) minimum quantity for Point-to-Point (PTP) Obligation bids into the DayPage 2 of 6
Summary of Nodal Protocol Revisions
Effective: September 1, 2014
Ahead Market (DAM).
Revised Subsection: 4.4.6.1 [effective upon system implementation]
Section 5:
NPRR615 – PVGR Forecasting
See Section 2 above.
Revised Subsections: 5.7.4 and 5.7.4.1.1 [effective upon system implementation]
NPRR616 – Alignment of Transaction Timing to the PUCT Performance Measures
This Nodal Protocol Revision Request (NPRR) clarifies that the ERCOT Operator
has discretion as to when to send a notification to affected Qualified Scheduling
Entities (QSEs) when an Ancillary Service is found to be undeliverable due to
infeasibility during a Reliability Unit Commitment (RUC) Study Period.
Revised Subsection: 5.5.2
Section 6:
NPRR614 – Clarification of Telemetered Value of HSL for Combined Cycle
Generation Resources providing RRS
This Nodal Protocol Revision Request (NPRR) clarifies that Combined Cycle
Generation Resources providing Responsive Reserve (RRS) may adjust the
telemetered High Sustained Limit (HSL) in compliance with Resource limits in
providing Ancillary Services.
Revised Subsection: 6.5.5.2 [effective upon testing completion]
NPRR615 – PVGR Forecasting
See Section 2 above.
Revised Subsection: 6.3.1 [effective upon system implementation]
NPRR616 – Alignment of Transaction Timing to the PUCT Performance Measures
See Section 5 above.
Revised Subsection: 6.4.9.1.2
NPRR626 – Reliability Deployment Price Adder (formerly “ORDC Price Reversal
Mitigation Enhancements”)
Page 3 of 6
Summary of Nodal Protocol Revisions
Effective: September 1, 2014
See Section 2 above.
Revised Subsections: 6.3, 6.3.2, 6.4.4.1, 6.5.7.3, 6.5.7.3.1, 6.5.9.2, 6.6.1, 6.6.1.1,
6.6.1.2, 6.6.3.1, 6.7.4, and 6.7.5 [effective upon system implementation]
NPRR629 – Removal of Black Start Plan Posting Requirement
This Nodal Protocol Revision Request (NPRR) removes the Black Start plan
posting requirement from the Protocols as this requirement is being relocated to
the Nodal Operating Guides.
Revised Subsection: 6.5.9.6
NPRR630 – As-Built Clarifications to Settlements of ORDC
This Nodal Protocol Revision Request (NPRR) defines the System-Wide
Discount Factor and clarifies the role of this factor in the formulas used in the
Settlements of the Operating Reserve Demand Curve (ORDC); and corrects an
error in the formula for calculating the Real-Time Ancillary Service Imbalance
Amount in Section 6.7.4, Real-Time Ancillary Service Imbalance Payment or
Charge.
Revised Subsections: 6.5.7.3 and 6.7.4
Section 9:
NPRR618 – Market Notices for Resettlement Statements and True-up Settlement
Timeline Changes
This Nodal Protocol Revision Request (NPRR) replaces requirements to post
Notices on the Market Information System (MIS) for communication of DayAhead Market (DAM) and Real-Time Market (RTM) Resettlements and True-Up
Settlement timeline changes with Market Notices.
Revised Subsections: 9.2.6, 9.5.7, and 9.5.9
NPRR626 – Reliability Deployment Price Adder (formerly “ORDC Price Reversal
Mitigation Enhancements”)
See Section 2 above.
Revised Subsection: 9.5.3 [effective upon system implementation]
NPRR628 – Notification of Financial Impact of Settlement Disputes
This Nodal Protocol Revision Request (NPRR) aligns the Protocols with the
current practice for reporting on the financial impact of Settlement disputes and
Page 4 of 6
Summary of Nodal Protocol Revisions
Effective: September 1, 2014
requires ERCOT to provide a report on the Market Information System (MIS)
containing the status of each dispute submitted.
Revised Subsections: 9.14.4, 9.14.4.2.2, and 9.14.4.2.3
NPRR630– As-Built Clarifications to Settlements of ORDC
See Section 6 above.
Revised Subsection: 9.5.3
Section 15:
NPRR608 – Alignment of Transaction Timing to the PUCT Performance Measures
This Nodal Protocol Revision Request (NPRR) aligns ERCOT’s processing time
with the transactional timing in the Public Utility Commission of Texas’
(PUCT’s) Performance Measures.
Revised Subsections: 15.1.1.7, 15.1.4.1, 15.1.4.2, 15.1.4.3, 15.1.4.5, 15.1.4.7.1,
15.1.4.7.2, 15.1.5.2, 15.1.5.6, and 15.3
Section 16:
NPRR620 – Collateral Requirements for Counter-Parties with No Load or
Generation
This Nodal Protocol Revision Request (NPRR) revises the calculation of credit
exposure for Counter-Parties that represent neither Load nor generation by
adjusting the M1 factor for forward exposure risk to reflect the fact that these
Counter-Parties do not have Mass Transition risk, reducing the 40-day “look
back” period for certain exposure components to 20 days, and specifying a
Minimum Current Exposure (MCE) for these Counter-Parties that is also used as
the Initial Estimated Liability (IEL).
Revised Subsections: 16.11.4.1, 16.11.4.2, and 16.11.4.3 [effective upon system
implementation]
NPRR621 – Counter-Party Specific Calculations for M1 Variable
This Nodal Protocol Revision Request (NPRR) replaces the fixed value for M1
with a calculation that will be specific to each Counter-Party.
Revised Subsections: 16.11.4.1 and 16.11.4.3
Administrative Changes:
Page 5 of 6
Summary of Nodal Protocol Revisions
Effective: September 1, 2014
Non-substantive administrative changes were made such as spelling corrections,
formatting and correcting Section numbering and references.
Revised Subsections: 3.10, 6.7.4
Page 6 of 6