NPRR #209 · Revision Request
NPRR209 Data Posting Changes to Comply with P.U.C. Subst. R. 25.505
ReasonState Estimator data includes transmission and transformer flow information as identified in paragraphs (4)(b) and (4)(d) of Section 6.5.7.1.13, Data Inputs and Outputs for the Real-Time Sequence and SCED. Because transmission and transformer flow data at generation-only busses reflects generation output, disclosure of this information would make it possible to determine Resource status information in Real-Time. Resource status information has consistently been considered competitively sensitive information in the competitive market and cannot be posted until 60 days after the operating day. See subsection (f)(3)(B)(iii) of P.U.C. Subst. R. 25.505, Resource Adequacy in the Electric Reliability Council fo Texas Power Region. During the initial phases of Nodal Market testing, NRG Texas noticed that the posting of certain transmission information every hour, as required by Protocol Sections 6.5.7.1.13(4)(b) and (d), allows Market Participants to determine the actual output of Resources on the system. NRG Texas and Calpine filed comments and a proposed amendment to address this issue via NPRR 202, Clarification of Network Operations Model and State Estimator Postings, which restricted other information in the network model from being publicly posted. The proposed amendment was rejected, due in part to concerns that attempting to modify NPRR202 could hold up that NPRR’s implementation. Because NRG Texas and Calpine agree that the majority of NPRR202 is acceptable and neither entity wishes to hold up progress on NPRR202, they chose not to appeal the rejection of the proposed amendment. Instead, this new NPRR addresses the specific issues that are of concern to NRG Texas and Calpine. PUCT Subst. R. 25.505(f)(3)(B) states: "Two months after the start of operation of the market under a nodal market design: Offer curves (prices and quantities) for each type of ancillary service and for energy at each settlement point in the real-time market, shall be posted 60 days after the day for which the information is accumulated except that, for the highest-priced offer selected or dispatched for each interval on an ERCOT-wide basis, ERCOT shall post the offer price and the name of the entity submitting the offer 48 hours after the day for which the information is accumulated. If the MCPE or the MCPC exceeds the event trigger during any interval, the portion of every market participant’s price-quantity offer pairs for balancing energy service and each other ancillary service that is at or above the event trigger for that service and that interval shall be posted seven (7) days after the day for which the offer is submitted. Other resource-specific information, as well as self-arranged energy and ancillary capacity services, and actual resource output, for each type of service and for each resource at each settlement point shall be posted 60 days after the day for which the information is accumulated." (emphasis added)If Resource status information is available in Real-Time, in addition to being contrary to the PUCT rule, availability of this data may provide gaming opportunities. For example, the availability of such data may allow other generation owners to know when generation is not available in a certain area and raise their offer prices accordingly.
Created2010-02-18
Approved2010-11-16
Sections Affected
1.3.1.16.5.7.1.13
Summary
This Nodal Protocol Revision Request (NPRR) removes a requirement to post certain State Estimator information that can be used to determine Resource status, which is confidential information as per Public Utility Commission of Texas (PUCT) rules.
Action Log 8 milestones
-
Aug 5
TACDeferred/Tabled→ TAC for consideration.
-
Jul 1
TACDeferred/Tabled→ TAC for consideration.
-
May 6
TACDeferred/Tabled→ TAC for consideration.
-
Mar 25
PRSRecommended for Approval→ PRS for Impact Analysis review.
-
Apr 22
PRSRecommended for Approval→ TAC for consideration.
-
Feb 18
PRSDeferred/Tabled→ PRS for language consideration.
-
Nov 4
TACRecommended for Approval→ ERCOT Board for consideration.
-
Nov 16
BOARDApproved
Amendments
| Date | Body | Motion | Result |
|---|---|---|---|
| Nov 4 '10 | TAC | To recommend approval of NPRR209 as amended by the 11/4/10 Luminant Energy comments and as revised by TAC. | Passed |
Ballots
| Date | Body | Result | Yes | No | Abstain | |
|---|---|---|---|---|---|---|
| Jul 1 '10 | TAC | Motion Fails | 10 | 14 | 3 | xls |
| Jul 1 '10 | TAC | Motion Passes | 24 | 0 | 1 | xls |
Documents 27
| Name | Type | Posted | Classification |
|---|---|---|---|
| 209NPRR-01 Data Posting Changes to Comply with PUCT Rule 25 505 | doc | Feb 5 '10 | Revision Request |
| 209NPRR-02 CEO Revision Request Review 020510 | doc | Feb 5 '10 | Staff Report |
| 209NPRR-03 Luminant Energy Comments 021510 | doc | Feb 15 '10 | Revision Request Comments |
| 209NPRR-04 PRS Report 021810 | doc | Feb 19 '10 | Committee Report |
| 209NPRR-05 PRS Voting Ballot 021810 | xls | Feb 19 '10 | Revision Request Ballot |
| 209NPRR-06 PUC Staff Comments 032510 | doc | Mar 25 '10 | Revision Request Comments |
| 209NPRR-07 PRS Report 032510 | doc | Mar 26 '10 | Committee Report |
| 209NPRR-08 PRS Voting Ballot 032510 | xls | Mar 26 '10 | Revision Request Ballot |
| 209NPRR-09 Impact Analysis 041410 | doc | Apr 14 '10 | Staff Report |
| 209NPRR-10 LCRA and Garland Power Comments 042110 | doc | Apr 21 '10 | Revision Request Comments |
| 209NPRR-11 Luminant Energy Company LLC 042110 | doc | Apr 21 '10 | Revision Request Comments |
| 209NPRR-12 PRS Report 042210 | doc | Apr 27 '10 | Committee Report |
| 209NPRR-13 PRS Voting Ballot 042210 | xls | Apr 27 '10 | Revision Request Ballot |
| 209NPRR-14 NRG Texas and Calpine Comments 050410 | doc | May 4 '10 | Revision Request Comments |
| 209NPRR-15 TAC Report 050610 | doc | May 7 '10 | Committee Report |
| 209NPRR-16 TAC Voting Ballot 050610 | xls | May 7 '10 | Revision Request Ballot |
| 209NPRR-17 TAC Report 070110 | doc | Jul 6 '10 | Committee Report |
| 209NPRR-18 TAC Voting Ballot 070110 | xls | Jul 6 '10 | Revision Request Ballot |
| 209NPRR-19 TAC Voting Ballot 070110 | xls | Jul 6 '10 | Revision Request Ballot |
| 209NPRR-20 TAC Report 080510 | doc | Aug 5 '10 | Committee Report |
| 209NPRR-21 ERCOT Comments 102810 | doc | Oct 28 '10 | Revision Request Comments |
| 209NPRR-22 Revised Impact Analysis 102810 | doc | Oct 28 '10 | Staff Report |
| 209NPRR-23 NRG Texas Comments 110310 | doc | Nov 3 '10 | Revision Request Comments |
| 209NPRR-24 Luminant Energy Comments 110410 | doc | Nov 4 '10 | Revision Request Comments |
| 209NPRR-25 TAC Report 110410 | doc | Nov 5 '10 | Committee Report |
| 209NPRR-26 Revised CEO Revision Request Review 111210 | doc | Nov 12 '10 | Committee Report |
| 209NPRR-27 Board Report 111610 | doc | Nov 16 '10 | Committee Report |
Meetings That Took It Up 10
| Date | Meeting | Committee | Status |
|---|---|---|---|
| Nov 4 '10 | TAC Meeting | TAC | Concluded |
| Oct 7 '10 | TAC Meeting | TAC | Concluded |
| Sep 2 '10 | TAC Meeting | TAC | Concluded |
| Aug 5 '10 | TAC Meeting | TAC | Concluded |
| Jul 1 '10 | TAC Meeting | TAC | Concluded |
| Jun 3 '10 | TAC Meeting | TAC | Concluded |
| May 6 '10 | TAC Meeting | TAC | Concluded |
| Apr 22 '10 | PRS Meeting | PRS | Concluded |
| Mar 25 '10 | PRS Meeting | PRS | Concluded |
| Feb 18 '10 | PRS Meeting | PRS | Concluded |