Http://nodal.ercot.com 1 Market Trials DAM/RUC/SASM Weekly Update August 13, 2010.
Market Trials DAM/RUC/SASM
description
Transcript of Market Trials DAM/RUC/SASM
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Market TrialsDAM/RUC/SASM
Weekly Update
April 16, 2010
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Antitrust Admonition
ANTITRUST ADMONITION
ERCOT strictly prohibits Market Participants and their employees who are participating in ERCOT activities from using their participation in ERCOT activities as a forum for engaging in practices or communications that violate the antitrust laws. The ERCOT Board has approved guidelines for members of ERCOT Committees, Subcommittees and Working Groups to be reviewed and followed by each Market Participant attending ERCOT meetings. If you have not received a copy of these Guidelines, copies are available at the Client Relations desk. Please remember your ongoing obligation to comply with all applicable laws, including the antitrust laws.
DISCLAIMER
All presentations and materials submitted by Market Participants or any other Entity to ERCOT staff for this meeting are received and posted with the acknowledgement that the information will be considered public in accordance with the ERCOT Websites Content Management Operating Procedure.
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Agenda
• DAM summary for 4/13 and 4/15
• QSE Activities for Next Week
• FAQ
• General Reminders/Updates
• Environment Report
– Planned outages– Known Issues
• Dashboard Update
• Settlements/COMS
• Special Topics
• Question and Answers / General Discussion
• Appendix
ERCOT asks that Market Participants log into the WebEx session using their company name
and then their name. This will allow ERCOT to take roll-call offline.
Market Trials 2010 Roadmap
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Submission Overview for Apr 13
Submission overview
Overall, 156 QSEs
participated for Op Day 4/14
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Submission Overview for Apr 13
Submission overview
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Submission Overview for Apr 13
Submission overview
• Energy Bids from QSEs – 80% of Load was requested.
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Submission Overview for Apr 13
Submission overview
• AS Offers
– 31 QSEs submitted
– No AS insufficiency
• AS Self-Arrangement from QSEs
– 50% of AS Obligation was requested, ~43-47% received
– 38 QSEs sent in AS Self-Arrangement
• Energy Only Offers – 82 QSEs submitted EOOs
• PTP Obligation Bids – not allowed this week
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Submission Overview for Apr 15
Submission overview
Overall, 179 QSEs
participated for Op Day 4/16
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Submission Overview for Apr 15
Submission overview
Overview for Apr 15
• RRS - Hour 3 cleared at $567 and Hour 19 cleared at $633.49
Analysis:– Hour 3 - Due to a multi-hour block as the marginal offer with high
prices• Cost of the block covered by the one hour that the unit is marginal.
– Hour 19 - still under review
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Submission Overview for Apr 15
Submission overview
• Energy Bids from QSEs – 120% of Load was requested.
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Submission Overview for Apr 15
Submission overview
• AS Offers
– 30 QSEs submitted
– No AS insufficiency
• AS Self-Arrangement from QSEs
– 50% of AS Obligation was requested, ~37-44% received
– 45 QSEs sent in AS Self-Arrangement
• Energy Only Offers – 90 QSEs submitted EOOs
• PTP Obligation Bids – not allowed this week
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RUC Overview for Apr 15
RUC overview
• ERCOT committed three Resources:
– TXCITY_CC1_1 for Hours 7-10, 18
– TXCITY_CC1_2 for Hours 11-17
– FRNYPP_CC1_4 for Hours 1-24
• No Resources were decommitted
• ERCOT system operations approved this result
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Next Week’s Activities
DAM executing on 4/20 and 4/22 (Op Days are 4/21
and 4/23)
• Changes from this week’s activities:
– Self-Arranged AS no longer requested at 50%;
should be submitted at a reasonable quantity
that reflects the QSE’s business
– PTP Obligation Bids can be submitted again;
guardrails are up to 5 bids totaling 50 MW per
QSE per hour.
– Virtual Bids/Offers guardrails relaxed to 10
transactions per QSE per hour, with no MW
restriction; bids/offers should be reasonable
• Remember that Tuesday’s Load Bid MW target is
80% of forecasted load, and Thursday’s is 120%.
Week 4
Note: Dates are DAM execution days
4/20/2010 & 4/22/2010
Objective
DAM + DRUCRT/DA
Settlements
Network Constraints IncludedSelf-Arranged AS Requested Actual
Load Bid MW Requested
80% Tue/120% Thurs forecasted
load
Virtual Bids / Offers
Up to 10 transactions/
QSE/hr
PTP Obligations
Up to 5 bids totaling 50 MW/QSE/hr
NOIE CRR OffersAllocated CRRs
only
COP Updates
After DAM and DRUC
starting 4/15
DRUCDRUC w/ each
DAM
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Next Week’s Activities
DRUC executing on 4/20 and 4/22 after DAM (at
1430)
– COP updates required after DAM and DRUC
complete (resource status, AS schedule)• COPs will therefore be disconnected from
zonal/telemetry - this is expected.
Note that outages from zonal will be transferred
into nodal starting next week
– This transfer will represent approximately 85%
of the actual zonal outages
Week 4
Note: Dates are DAM execution days
4/20/2010 & 4/22/2010
Objective
DAM + DRUCRT/DA
Settlements
Network Constraints IncludedSelf-Arranged AS Requested Actual
Load Bid MW Requested
80% Tue/120% Thurs forecasted
load
Virtual Bids / Offers
Up to 10 transactions/
QSE/hr
PTP Obligations
Up to 5 bids totaling 50 MW/QSE/hr
NOIE CRR OffersAllocated CRRs
only
COP Updates
After DAM and DRUC
starting 4/15
DRUCDRUC w/ each
DAM
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FAQ
Q: Why did my fixed quantity Energy Bid clear above my bid price?
A: There is a known effect of the DAM optimization wherein fixed quantity bids could be
cleared higher than their bid price (and fixed quantity offers could clear lower than their
offer price). This is due to a rule that fixed quantity bids/offers cannot set the price. The
issue is described at length in Appendix 7 of the DAM requirements, posted at
http://nodal.ercot.com/docs/pd/mms/pd/damsasmr/mms_dam_and_sasm_req_09q1_v4_0%20%28blackline%29.doc
.
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General Reminders/Updates
• Network Model Update
– Next scheduled load is 5/3• An updated settlement points and MP short name list was posted for the 4/14 model load at
http://nodal.ercot.com/readiness/markettrials/index.html
• Phase 5 Kick Off WebEx set for April 29, 2010, from 1:00 until 4:00 Central.
– Details on the calendar page at http://www.ercot.com/calendar/2010/04/20100429-MT
• Phase 5 Handbook for DAM/RUC/SASM was posted on 3/31
– http://nodal.ercot.com/readiness/markettrials/dam/index.html
• New AS Plan for next week
– We have updated the AS Plan to mirror the zonal AS Plan, effective Op Day 4/18 (previously we were using test data that was flat throughout the day). We will update the nodal AS Plan every month when the zonal plan is updated
– NOTE: This means that your AS Obligations will change next week.
General Reminders/Updates
Trade confirmation testing
• ERCOT will maintain a list of QSEs that desire to test trade confirmation/bilateral process with other QSEs during market trials
• Email sent to Nodal Project Managers with a .xls attachment.
• Please fill out the spreadsheet, or send the following information, to [email protected] with the subject line ‘Trade Confirmation Testing Contacts’ by today (Friday, April 16, 2010).
– QSE short name– Contact name for trade confirmation– Phone number– Email address
• Once we have received this contact information, we will compile and distribute it to all QSEs participating so that the trading contacts can work together to complete their testing. Note that this information will only be shared with other trading contacts who have volunteered their own information.
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Support Metrics
* This week, 23 out of 267 questions were responded to outside of the 24 hour time frame.
Market Participant Inbound Questions
Last Week This Week
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Day-to-day operations summary: Planned / Unplanned Outages
• Outages– Planned Outages
• 04/23/10 – 04/25/10 – ERCOT will be performing the initial release for Phase 5 on 4/23– Due to the size and complexity of the release, it will be necessary to take systems
down periodically throughout the weekend– ERCOT will be running a series of tests that Sunday which may result in notifications
and / or data in the Nodal Production systems that are associated with that test. • 04/16/10 06:00 P.M. – 04/16/2010 07:00 P.M & 04/17/10 10:00 A.M. – 04/17/2010 11:00
A.M. – Market Manager site failover testing is planned during this period. A brief delay in
processing may occur. If authentication errors are encountered, signing back into the application will resolve the issue.
– Unplanned Outages• 04/13/10 12:00 P.M. – 04/13/2010 02:30 P.M.
– Authentication exceptions were being reported against EWS submissions. Issue occurred as a result of an update to the identity management system. Market Manager was fully functional during this time period.
• 04/12/10 09:00 A.M – 6:00 P.M– MPIM Application performance issues were noted during the day. MPs were unable
to assign certain roles to user certificates. Any new certificates created during this period with “NMMS” or “EMMS” roles will need to be completely terminated and reissued.
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Environment Report-Known Issues
Full DAM/RUC/SASM known issues list will post every Friday night at http://nodal.ercot.com/readiness/markettrials/dam/index.html
New DAM/RUC/SASM known issues
• There is an issue with the DAM when AS Offers are submitted for two Load Resources that are mapped to the same load point (PTID) in the network model. This is a valid modeling scenario and the DAM software will be updated to deal with this scenario. In the interim, DAM Operators will need to cancel one of the two AS Offers submitted until the defect is fixed., which is planned for the 4/23 release
• Two prices were reported for settlement point BVE_CC1. This was due to a modeling error with the 4/14 model load. There are two physical combined cycles “BYU_CC1” and “BVE_CC1” mapped to the same logical resource node.
– If causing import issues with your system, workaround is to delete one of the two settlement point prices prior to import
– We will communicate the date of fix later
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Environment Report-Known Issues
New DAM/RUC/SASM known issues (cont’d)
• MMS Phase 2 validation notification messages for Self Arranged AS transactions have an incorrect transaction type identified in the MRID being relayed back. Currently a value of “SAS” is being sent when it should return “SAA” instead.
• Get real-time SPP MarketInfo service returns incorrect GMT offset associated with the start time field. The offset currently being returned is set to -06:00 hrs when it should reflect -05:00 hrs.
• Request for “AggregatedASOfferCurves” data via EWS MarketInfo service is failing with xsd validation error message. Workaround is to download the report from MIS or via the Get Reports service.
• Market Manager – Dropdowns on the Trades page are static and not checking the latest info on the first load of the page. Select a different trade date, then reselect desired trade date and the drop downs will refresh and become dynamic.
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Environment Report-Known Issues
New MIS known issues
• NP5-751-CD, Daily RUC Committed or Decommitted Resources and NP5-752-CD, Hourly RUC Committed or Decommitted Resources, are currently on the known issues list as delayed reports for Phase 4. These will instead be moving to early Phase 5 delivery. I will be communicating the information contained within these reports either on this weekly call or via email to the Nodal PMs.
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Nodal Scorecard
MPs measured on 50% participation 5 DAM runs so far (4/1, 4/6, 4/8, 4/13, 4/15) Submission of DAM specific transactions All QSEs (includes sub-QSEs)
QSEs with Resources 54/78 (88% generation) COPs, TPOs do not count as participation (they count towards Real-Time Metric (MP15A))
QSEs without Resources 95/191If QSE without Load, transaction choices are Energy Bids, Energy Only Offers, PTP Obligation Bids
76% load participation
AMBER/RED scores go live on 4/21, MPs contacted this week
MP16 DAM Participation Metric Results
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COMS/Settlements Update
• Next weeks Operating Dates will be Settled (4/21 and 4/23)– DAM Statements and Invoices and RTM Initial Statements will be
posted according to Protocol Timelines– Must have DAM awards or own CRRs to receive a DAM Statement– Extracts will be posted within 48 hours of Statement approvals
• COMS/Settlements known issues list will be posted next Wednesday, 4/21– http://nodal.ercot.com/readiness/markettrials/coms/index.html
• May CRR Auction Invoices will be posted on Monday, 4/19
• Phase 5 Settlement Calendar Extract will be posted Friday, 4/23
• Dedicated COMS call beginning the first week in May
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COMS/Settlements Key April Dates
• April Operating Dates that will be settled– 4/21 Op Day
• DAM Statements and Invoices posted on 4/23• RTM Initial Statement posted on 5/3
– 4/23 Op Day• DAM Statements and Invoices posted on 4/27• RTM Initial Statement posted on 5/3
– 4/28 Op Day• DAM Statements and Invoices posted on 4/30• RTM Initial Statement posted on 5/10
– 4/30 Op Day• DAM Statements and Invoices posted on 5/4• RTM Initial Statement posted on 5/10
• First RTM Invoice will be posted on 5/6– It will invoice the RTM Initial Statement for operating day 4-21
Special Topics
DAM run on 4/13:
• A resource with an exclusive TPO was not fully dispatched for energy, even though the LMP at that resource node was greater than the resource’s incremental offer price for two operating hours (discovered by the price validation tool). This occurred because the SPP for this resource node during one post-process of the DAM engine was different than that during another due to a shift factor inconsistency.
• This inconsistency will happen when:
1) a contingency outages generators or Energy only offers/bids, and;
2) this contingency results in binding/violated constraints.
• In Network Security Monitor (NSM)/Network Constrained Unit Commitment (NCUC), contingencies that outage generators or loads require special process. The main point is to preserve power balance in post contingency scenario.
• LMP calculations require shift factors at electrical buses/settlement points, which is based on network topology only.
• But due to special processing in NSM/NCUC, the optimization results in situations where LMP and MW on offer/bid curve are not consistent.
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Special Topics
JOUs and COP consistencies
• In DAM, if the different owners of the jointly-owned unit have submitted conflicting COP statuses for the current day, online statuses will overwrite offline statuses when DAM is determining the initial condition of the unit (i.e., is the unit online or offline at the start of the next operating day.
• In RUC, if the different owners have conflicting COP statuses for the next operating day:
– If any owner has OUT status for any hour then the unit is considered OUT.
– If all owners have submitted a COP, and at least one of them has an online status in a particular hour then the resource status for the unit is online (unless any owner has OUT)
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Q&A
Q&A / Open Forum
Appendix
Appendix– DAM Kickoff slides– Pre- and post-DAM reports– Special Topics
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Objectives
Objectives of Phase 4.0 DAM/RUC Market Trials:
• Execute DAM, RUC, and SASM in the Market Trials environment twice a week
• Generate awards, notifications, and reports
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Entry Criteria
ERCOT Entry Criteria for Phase 4.0:
• ERCOT has completed required integration testing for Phase 4.0 functionality
• ERCOT has published all known, market-relevant defects to Market Participants
via the Readiness Center
Market Participant Entry Criteria for Phase 4.0:
• QSEs have met the system requirements (digital certificate with ‘MMS Trader’
role assigned, etc.)
• QSEs have completed the qualification testing and have confirmed their ability to
use Web Services or the Market Manager to submit transactions necessary to
support Day-Ahead Market Trials
Summary of QSE Activities
• QSEs with Resources: • Maintain SCED offers and ensure Start-Up and Minimum Generation
Offers are available prior to the Day Ahead 10:00 a.m. (Central) deadline
• Submit AS Offers• Update COP after DAM, DRUC, HRUC starting 4/13
• QSEs with Load: • Self-Arrange requested amount of AS Obligations• Bid a portion of their Load in the DAM (see example on next slide). In
general, this should take the form of an Energy Bid but during the last week of April, can also be in the form of a PTP Obligation Bid.
– Tuesday- 80% of QSE’s forecasted Load– Thursday- 120% of QSE’s forecasted Load
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Summary of QSE Activities
• QSEs with Load (cont’d): Example for load bids
• All QSEs:
• May submit a limited amount of DAM Energy Only Offers and DAM Energy Bids that do not represent actual Resources or Loads (virtual bids and offers) – limit is up to a MW quantity total contained within a certain number of transactions per hour.
• PTP Obligation Bids will be limited as well
Details with dates on next slide
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Hour-Ending HE 0100 HE0200 HE0300 … HE2400 ERCOT System Load Forecast
(download from MIS) 21,000 20,500 20,000 20,500 120% of System Load Forecast 25,200 24,600 24,000 24,600
QSE-A with Load Ratio Share = 10% 2,520 2,460 2,400 2,460 QSE-B with Load Ratio Share = 1% 252 246 240
246
QSE-C with Load Ratio Share = 5% 1,260 1,230 1,200
1,230
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Schedule/Key Dates
Week 1 Week 2 Week 3 Week 4 Week 5
Note: Dates are DAM execution days 4/1/2010
4/6/2010 & 4/8/2010
4/13/2010 & 4/15/2010
4/20/2010 & 4/22/2010
4/27/2010 & 4/29/2010
ObjectiveConnectivity /
ExecutionAS co-
optimizationNetwork constrained
+ Initial DRUCDAM + DRUC
DAM + DRUC + HRUC + SASM
Network Constraints None None Included Included IncludedSelf-Arranged AS Requested 100% 50% 50% Actual Actual
Load Bid MW Requested
80/120% forecasted load
80/120% forecasted load
80/120% forecasted load
80/120% forecasted load
80/120% forecasted load
Virtual Bids / Offers
Up to 5 transactions totaling 50
MW/QSE/hr
Up to 5 transactions totaling 50
MW/QSE/hr
Up to 10 transactions totaling
100 MW/QSE/hr
Up to 10 transactions/
QSE/hrUp to 10
transactions/QSE/hr
PTP Obligations
Up to 5 bids totaling
50 MW/QSE/hr
Up to 5 bids totaling
50 MW/QSE/hr None
Up to 5 bids totaling
50 MW/QSE/hr
Up to 5 bids totaling 50 MW/QSE/hr (unless
the bid represents QSE's load)
NOIE CRR OffersAllocated CRRs
onlyAllocated CRRs
only NoneAllocated CRRs
only Allocated CRRs only
COP Updates Not needed Not neededAfter DAM and
DRUCAfter DAM and
DRUCAfter DAM, DRUC and
HRUC
DRUC None None DRUC ThursdayDRUC after each
DAM DRUC after each DAMHRUC None None None None LimitedSASM None None None None Yes
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Activities
Market Participant Activities:
• Submit, update, and cancel DAM submission items, while keeping within the guardrails.– Three-Part Supply Offers (including Minimum Energy Offer and Startup Costs)– COP– AS Offer– AS Self-Arrangement– Energy-Only Offers– Energy Bids– PTP Obligation Bids– CRR Offer (for NOIEs only)
• Report any issues to the Market Trials Team at [email protected]
• Download and review pre-DAM and post-DAM report postings
• Download and review RUC postings, as applicable
• Download and review SASM posting, as applicable
• Update COP (after DAM, RUC)
• Submit self-selected credit limit to ERCOT, if desired, as often as weekly
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Activities
ERCOT Activities:
• Execute DAM (including Phase 2 Validation), DRUC, HRUC and SASM
periodically
• Generate Awards, Day-Ahead LMPs/SPPs, and other reports
• Communicate DAM/RUC/SASM reports and outputs to the market via Market
Information System (MIS) postings
• Verify QSE submission activities
• Work with Market Participants to resolve issues
• Update Counterparty credit limits with self-selected credit limits submitted by
MPs
Other
Note:• All transactions will be supported.
• Trade submission and confirmation (Energy, Capacity and AS Trades) may be exercised at this time.
• DAM notifications will be active.
• Phase 2 Validation process will be active and supported.
• QSE transactions that do not follow the guidelines are subject to cancellation at ERCOT’s discretion.
• ERCOT may run DAM on non-supported days. No QSE participation is requested, and ERCOT staff will not be available to answer questions regarding the outputs of these non-supported processes.
• CRR information from the market trials auction conducted in March for the month of April will be integrated into the market system. CRR Offers (by NOIEs) must contain CRR IDs from this auction in order to be valid.
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Exit Criteria
ERCOT Exit Criteria
• ERCOT completes DAM execution with Market Participant data, as planned
• ERCOT completes RUC execution with Market Participant data, as planned
• ERCOT completes SASM execution with Market Participant data, as planned
Market Participant Exit Criteria
• Each QSE participates in at least 50% of the available scheduled DAM executions by successfully submitting the relevant transactions as tracked on the DAM participation dashboard
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Dashboard
MP16 Day-Ahead Market Participation
Requires at least 50% participation in Market Trials Day Ahead Market runs (includes all sub-QSEs)
Metric is reported up to the 168 Hour Test
80% of Load and 80% of Generation participation required to meet the metric
Light up date of 4/1 for GREEN/WHITE and 4/21 for AMBER/RED
Participation equals any DAM-specific transactions (bids, offers, or AS self-arrangements)
Nodal Scorecard Reminder
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Supplemental Materials
Slide 43
Reference and Description Location Version
External Interfaces Specification
http://nodal.ercot.com/readiness/sandbox/index.html 1.19
Explanation of Market Submission Items
http://nodal.ercot.com/readiness/markettrials/connectivity/index.html
0.26
Market Manager User Guide http://nodal.ercot.com/readiness/markettrials/connectivity/index.html
0.06
MMS Requirements http://nodal.ercot.com/docs/pd/mms/index.html#req Various
Market Connectivity Handbook http://nodal.ercot.com/readiness/markettrials/connectivity/index.html
0.97
DAM/RUC Known Issues List http://nodal.ercot.com/readiness/markettrials/dam/index.html
N/A
Web Services XSDs http://nodal.ercot.com/readiness/sandbox/index.html 1.3.19
Sample Reports, Extracts, and DDLs
http://nodal.ercot.com/readiness/reports/index.html Various
DAM ERCOT Operating Procedures
http://nodal.ercot.com/readiness/markettrials/dam/index.html
2.0
DRUC/WRUC ERCOT Operating Procedures
http://nodal.ercot.com/readiness/markettrials/dam/index.html
0.2
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Report Postings
Posted by 6 am:
• Ancillary Services (AS) Plan
• Load Ratio Shares (these will be static based on Zonal production data as of October 16, 2009) *
• AS Obligations *
• Wind Generation Resource Power Potential (WGRPP) forecast * and Aggregated WGRPP forecast
• List of all Settlement Points and the mapping to Electrical Buses
• Load forecasts for ERCOT system, Weather Zones and Load Zones
• Load forecast distribution factors
• Distribution Loss Factors and forecasted Transmission Loss Factors
• Weather assumptions
* Denotes MIS Certified reports
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Report Postings
Posted after each DAM:
• Awards (AS Offers, Energy Offers, DAM Energy-Only Offers, DAM Energy Bids, CRR Offers, and PTP Obligation Bids) *
• DAM Clearing Price for Ancillary Services (MCPC)
• Day-Ahead hourly Settlement Point Prices (SPPs)
• Day-Ahead hourly Locational Marginal Prices (LMPs)
• Shadow Prices
• Quantity of AS Offers
• Aggregated AS Offer Curve
• Total quantity of energy (in MWh) bought and sold in DAM
See DAM Handbook for a list of all DAM/RUC/SASM reports available starting in Phase 4.0 - http://nodal.ercot.com/readiness/markettrials/dam/index.html. See MIS Handbook for a comprehensive list of reports available - http://nodal.ercot.com/readiness/markettrials/mis/index.html.
* Denotes MIS Certified reports
Special Topics
Phase 2 Validation reports and process• Phase 2 validation re-evaluates all submitted transactions at 7 am in
the day-ahead with updated information, such as AS Obligation, CRR ownership, credit limits, etc.
• If there is a validation error, ERCOT will cancel the transaction• We send a notification that a Phase 2 report is available for a particular
transactions type, and notification containing the cancellation for the transaction.
• You can query for the Phase 2 report via web service or on the Reports page of the Market Manager in order to view the reason for the cancellation.
• Correct and resubmit prior to 10 am.• Note that submissions are locked out during the Phase 2 process,
which is currently taking about 15 minutes to complete.
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Special Topics
Day-Ahead Self Commitment
DAM clearing engine treats your TPO differently if you submit Startup and Minimum Energy (SU/ME) costs as $0 vs. NULL
• If you submit with SU/ME as $0, DAM engine treats this as a normal offer where the QSE is not requesting SU/ME to be covered. HSL/LSL constraints will be respected. Also, if you are selected for an online Ancillary Service, you will also be awarded at least LSL on your offer curve.
• If you submit with SU/ME as NULL, DAM engine is signaled to ignore the HSL/LSL constraints for the resource. In this scenario, the offer curve submitted will start at 0 MW and go to the max MW quantity desired – again, DAM will ignore LSL/HSL constraints. If the offer curve submitted doesn’t start at 0 MW, it will be extended to 0 MW by DAM. If the resource is selected for Ancillary Services, no requirement to also award TPO at LSL (since no LSL constraint honored in this case).
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Special Topics
Day-Ahead Self Commitment
The purpose of the NULL: It allows a QSE to use part of a Resource to serve its own load, and then offer in the rest to the DAM and enable the offer to be co-optimized with its AS Offer.
Example:
A Resource has 100 MW LSL and 400 MW HSL, and the QSE has already committed 300 MW of the Resource through some other mechanism. The QSE wishes to offer the remaining 100 MW, which would otherwise be ignored due to the 100 MW LSL.
Then going into real-time, so QSEs will need to update their TPO to cover the full capacity of the resource, from LSL to HSL, rather than from 0 MW. To do that if the resource is awarded in the DAM, the QSE must provide a reason code, which is DSCM.
This functionality came about due to TPTF subgroup on the issue. It has not yet been added to the protocols but will during our protocol traceability/cleanup effort.
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Special Topics
Bid/Offer efficiencies
• ERCOT has identified efficiencies in Bid/Offers submission with regard to the format of submission
• This applies to all transaction that use a Bid ID or an Offer ID (Energy Only Offers, Energy Only Bids, PTP Obligation Bids, and CRR Offers)
• Preference is for QSEs to submit the same Bid/Offer ID for each hour in the submission, versus submitting a different Bid/Offer ID for every hour. The market system treats the submission the exact same way, regardless of which format is used
• Using the preferred format will optimize DAM system performance
• For xml examples detailing this issue, please view a document that will be posted along with this presentation on the calendar page at http://www.ercot.com/calendar/2010/04/20100409-MT
• This was discussed at NATF 4/6, we send an email to the nodal technical contacts that we have on file for all QSEs, and we will add it to the External Interfaces Specification
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