Market Trials DAM/RUC/SASM

http://nodal.ercot.com 1

Market TrialsDAM/RUC/SASM

Weekly Update

April 23, 2010


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.


Agenda

• DAM/RUC summary for 4/20 and 4/22

• QSE Activities for Next Week

• General Reminders/Updates

• Environment Report

– Planned/unplanned outages– Known Issues

• Dashboard Update

• Settlements/COMS

• 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



Submission Overview for Apr 20

Submission overview

• 209 QSEs participated for Op Day 4/21

• Cleared 18,404- 23,225 MW per hour

• Load Zone prices ranged from $3.23 to $31.24.



Date Delivery Hour

Energy Only Offers (virtual) awarded (MW)

3-Part Supply Offers (physical

resources) awarded (MW)

Energy Bids awarded (load)

(MW)LZ_Houston

($/MW)LZ_North ($/MW)

LZ_South ($/MW)

LZ_West ($/MW)

4/21/2010 1 607.8 18,466.2 19,074.0 23.03$ 22.28$ 23.18$ 7.29$ 4/21/2010 2 679.8 17,865.1 18,544.6 22.25$ 21.34$ 22.55$ 7.32$ 4/21/2010 3 658.6 17,852.0 18,510.7 22.09$ 21.02$ 22.52$ 7.35$ 4/21/2010 4 673.5 17,730.6 18,404.3 22.05$ 20.92$ 22.51$ 7.37$ 4/21/2010 5 683.3 18,099.4 18,782.7 21.85$ 21.09$ 22.06$ 7.33$ 4/21/2010 6 603.8 18,481.1 19,085.0 22.28$ 21.42$ 22.55$ 7.35$ 4/21/2010 7 780.6 19,727.4 20,507.6 24.56$ 23.57$ 25.00$ 13.19$ 4/21/2010 8 771.9 20,370.2 21,142.4 25.62$ 24.22$ 26.47$ 17.62$ 4/21/2010 9 793.1 20,435.7 21,228.9 25.73$ 24.35$ 26.60$ 19.35$ 4/21/2010 10 780.5 20,472.9 21,253.0 26.29$ 24.49$ 27.60$ 24.15$ 4/21/2010 11 860.0 20,207.5 21,067.7 27.23$ 24.58$ 29.16$ 24.14$ 4/21/2010 12 776.0 20,490.8 21,266.9 26.82$ 24.77$ 28.33$ 24.36$ 4/21/2010 13 849.7 20,439.4 21,289.2 27.81$ 25.00$ 29.86$ 24.60$ 4/21/2010 14 941.9 20,447.7 21,389.5 28.55$ 25.42$ 30.86$ 24.86$ 4/21/2010 15 825.4 20,744.9 21,570.5 28.27$ 26.02$ 29.94$ 25.33$ 4/21/2010 16 932.3 20,925.6 21,858.1 27.72$ 25.68$ 29.18$ 25.00$ 4/21/2010 17 966.1 20,822.7 21,788.7 28.94$ 26.38$ 30.78$ 25.67$ 4/21/2010 18 859.4 21,154.2 22,013.8 28.08$ 26.33$ 29.34$ 25.51$ 4/21/2010 19 924.5 20,903.9 21,828.4 29.13$ 26.25$ 31.24$ 25.51$ 4/21/2010 20 791.6 21,321.3 22,113.0 26.21$ 25.00$ 27.08$ 23.86$ 4/21/2010 21 936.5 21,788.8 22,725.6 27.65$ 25.00$ 29.48$ 19.18$ 4/21/2010 22 931.4 22,294.0 23,225.3 26.06$ 24.83$ 26.58$ 10.00$ 4/21/2010 23 435.9 21,102.6 21,538.7 24.55$ 24.15$ 24.37$ 3.95$ 4/21/2010 24 434.7 20,084.1 20,518.8 23.57$ 23.91$ 22.81$ 3.23$



Date Delivery HourRRS awarded

(MW) RRS MCPCNSPIN awarded

(MW)NSPIN MCPC

RegUp awarded (MW)

RegUp MCPC

RegDn awarded (MW)

RegDn MCPC

4/21/2010 1 1,576.6 11.69$ 936.5 0.94$ 671.2 11.36$ 747.1 4.02$ 4/21/2010 2 1,580.3 102.97$ 938.1 0.94$ 919.0 102.71$ 610.7 4.02$ 4/21/2010 3 1,581.3 10.24$ 1,367.0 6.24$ 566.1 10.24$ 522.7 3.82$ 4/21/2010 4 1,583.1 10.52$ 1,366.4 6.52$ 596.5 10.52$ 620.5 4.02$ 4/21/2010 5 1,578.2 9.84$ 1,366.4 5.83$ 543.2 9.83$ 552.7 4.00$ 4/21/2010 6 1,575.7 15.58$ 1,366.1 10.50$ 706.2 15.00$ 1,097.6 6.64$ 4/21/2010 7 1,566.5 14.18$ 1,453.2 10.18$ 806.9 14.18$ 757.4 4.02$ 4/21/2010 8 1,553.0 16.00$ 1,453.7 12.00$ 754.0 16.00$ 990.2 5.04$ 4/21/2010 9 1,547.2 15.44$ 1,451.8 11.44$ 789.2 15.44$ 1,013.2 4.02$ 4/21/2010 10 1,548.1 16.00$ 1,450.5 12.00$ 763.3 16.00$ 790.0 4.02$ 4/21/2010 11 1,551.0 109.75$ 1,538.2 105.75$ 849.3 109.75$ 753.0 4.02$ 4/21/2010 12 1,558.1 16.00$ 1,536.8 12.00$ 669.5 16.00$ 785.7 4.02$ 4/21/2010 13 1,562.9 19.15$ 1,537.1 15.15$ 764.7 19.15$ 626.1 4.02$ 4/21/2010 14 1,571.1 20.32$ 1,536.8 16.31$ 741.8 20.31$ 659.1 4.02$ 4/21/2010 15 1,578.9 24.54$ 1,740.2 17.68$ 551.2 21.68$ 634.4 4.02$ 4/21/2010 16 1,584.3 22.22$ 1,740.4 17.09$ 725.4 21.09$ 467.9 4.02$ 4/21/2010 17 1,584.8 27.33$ 1,738.4 23.33$ 940.7 27.33$ 653.8 4.02$ 4/21/2010 18 1,584.1 16.76$ 1,738.3 12.76$ 597.8 16.76$ 948.3 4.02$ 4/21/2010 19 1,587.6 212.01$ 1,265.7 207.01$ 1,509.2 212.01$ 923.3 5.12$ 4/21/2010 20 1,585.8 13.40$ 1,263.2 9.40$ 1,056.0 13.40$ 832.5 4.02$ 4/21/2010 21 1,578.7 19.24$ 1,263.8 14.24$ 1,203.2 19.24$ 717.7 4.02$ 4/21/2010 22 1,577.3 11.48$ 1,265.8 6.80$ 760.7 10.80$ 828.5 4.02$ 4/21/2010 23 1,581.6 20.94$ 932.4 0.94$ 1,172.8 19.57$ 932.1 9.20$ 4/21/2010 24 1,590.1 103.09$ 935.6 0.94$ 909.0 13.54$ 833.6 4.78$



Submission overview

• Energy Bids from QSEs – 80% of Load was requested.



Submission overview

• AS Offers

– 33 QSEs submitted

– No AS insufficiency

• AS Self-Arrangement from QSEs

– No guardrails on self-arrangement. Received 62-97% of zonal arrangements.

– 35 QSEs sent in AS Self-Arrangement

• Energy Only Offers – 110 QSEs submitted EOOs

• PTP Obligation Bids

– 62 QSEs submitted PTP Bids

– Averaged 2,984 MW hourly bid, 2,735 hourly award


RUC Overview for Apr 20

RUC overview

• ERCOT ran DRUC on Apr 20 and published results reflecting no commitments

– The objectives for this week were to execute RUC using defined business processes, market data, and zonal production data (outages, load distribution factors, load forecast, etc)

– When the DRUC software solved, based upon review and operational experience by the approving ERCOT Operator, ERCOT did not select any of the Resources recommended for commitment.

– Initial analysis of the solution indicates:• Different data observed than used in iTest (merging of market and production data)

• Defect in the vendor software that was triggered due to a special scenario created with the outage data that were imported from zonal into nodal after the DAM and before the DRUC

• Overall solution reflected more constraints and unit commitment than expected

• Observed numerous false commit/de-commitments due to COP inconsistencies as well as Wind resources being considered by RUC

– ERCOT is working through the software and data issues (short turnaround expected)

• Until receipt of the emergency patch, a manual workaround has been developed (certain scenarios only)

– At this point no significant RUC clearing issues identified (show-stoppers)



Submission overview

• 216 QSEs participated for Op Day 4/23

• Cleared 22,572- 31,745 MW per hour

• Load Zone prices ranged from $24.88 to $49.23.



Submission overview

• Energy Bids from QSEs – 120% of Load was requested.



Submission overview

• AS Offers

– 33 QSEs submitted

– Potential for AS insufficiency given the inputs received, so DAM Operators reduced the AS Plan by 20% across the hours and AS types

• AS Self-Arrangement from QSEs

– No guardrails on self-arrangement

– 36 QSEs sent in AS Self-Arrangement

• Energy Only Offers – 99 QSEs submitted EOOs

• PTP Obligation Bids

– 63 QSEs submitted PTP Bids

– Averaged 3,232 MW hourly bid, 2,334 hourly award


RUC Overview for Apr 23

RUC overview

• Similar behavior and results to Tuesday’s execution run

• ERCOT is still evaluating results- more detailed update next week.

Follow up on Apr 15

• RRS on April 15– Hour 3 cleared at $567 and Hour 19 cleared at $633.49

Analysis:– For both hours, the price spikes occurred because of a multi-hour

block as the marginal offer with high offer prices (different multi-hour blocks, but same resource for both hours)

• For these hours there were no remaining dispatchable RRS offers left to select, so the clearing engine had to use a multi-hour block, and the extra costs incurred in procuring the entire block to satisfy that single hour are taken from the other hours and applied to the single short hour where the unit is marginal



Next Week’s Activities

Next week – Op Days are 4/28 and 4/30

DAM executing on 4/27 and 4/29

• No changes to DAM from this week’s activities.– We will continue to evaluate for potential AS insufficiency

and reduce the AS Plan prior to clearing if necessary to

avoid an AS insufficiency

– Remember that Tuesday’s Load Bid MW target is 80% of

forecasted load, and Thursday’s is 120%.

DRUC executing on 4/27 and 4/29 after DAM

HRUC and SASM executing on 4/28 and 4/30

• First time runs for HRUC and SASM– HRUC will be executed on Wednesday and Friday at 10 am

(target Operating Hours will be the balance of the Op Day)

– SASM will be opened for one target Operating Hour for

Increased AS Plan for NSRS (Hour 1600) on Wednesday

and Friday at 9 am

• SASM AS Self-arrangement is optional

Week 5

Note: Dates are DAM execution days

4/27/2010 & 4/29/2010

Objective

DAM, DRUC, HRUC, & SASM+ Settlements

Network Constraints IncludedSelf-Arranged AS Requested DAM - 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 UpdatesAfter DAM, DRUC

and HRUC

DRUC W/ each DAMHRUC LimitedSASM Yes



Next week

• Reminder that we started transferring zonal outages to

nodal this week (completed at 1 pm on Tuesday)

– This transfer represents approximately 85% of the

actual zonal outages

– Targeted for transfer every Monday

• RUC experiencing issues with the outages, load

distribution factors, and software parameters (shift factor

cutoff percentage) that has affected the solution. More

work is needed to tune the software and resolve data

issues.

• Next week ERCOT may do workarounds outside the

normal business process to sidestep any issues that

arise. Furthermore, we will approve the results of the

RUC software even if the result is operationally

unreasonable. The purpose of this is to exercise

settlement and billing determinants related to RUC.

Week 5

Note: Dates are DAM execution days

4/27/2010 & 4/29/2010

Objective

DAM, DRUC, HRUC, & SASM+ Settlements

Network Constraints IncludedSelf-Arranged AS Requested DAM - Actual


80% Tue/120% Thurs forecasted

load



QSE/hr

PTP Obligations

Up to 5 bids totaling 50 MW/QSE/hr


only

COP UpdatesAfter DAM, DRUC

and HRUC

DRUC W/ each DAMHRUC LimitedSASM Yes


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


Trade confirmation testing

• ERCOT created a list of QSEs that signed up to test trade confirmation/bilateral process with other QSEs during market trials

• The deadline for adding your QSE to this list was last Friday, April 16, 2010.

• We had a few late requests this week, so we will send one final update on Monday morning. If you did not make the previous deadline and have not already done so, send the following information, to [email protected] with the subject line ‘Trade Confirmation Testing Contacts’ by COB today

– QSE short name– Contact name for trade confirmation– Phone number– Email address

• We compiled and distributed the information on Monday 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.




• This Wednesday, ERCOT ran a DRUC on Wednesday, April 21 (for Operating Day April 22, a non-supported day) in order to send at least one DRUC instruction to every QSE with Resources.

• The purpose of this was as a technical test only so QSEs can receive the Startup/Shutdown Instructions xml message in order to test their systems

• We plan to redo this test on Wednesday, May 5 (for Operating Day May 6)– Please note that we may send instructions to online Resources since we

are manually overriding the RUC process to ensure every QSE gets an instruction

• ERCOT also plans to test these manual RUC commitments as part of the Operational Scenarios in June (Market Trials Phase 5)


Support Metrics

* This week, 23 out of 303 questions were responded to outside of the 24 hour time frame.

Market Participant Inbound Questions

Last Week This Week


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 outage period.– ERCOT will be running a series of test that Sunday which may result in notifications

and / or data in the Nodal Production systems that are associated with that test.

• Unplanned Outages• 04/20/10 08:00 A.M. – 04/21/2010 10:00 A.M.

– Links to the following resources were missing from MIS Portal during the reported period. Issue was attributable to a role synchronization problem between MIS and MPIM applications.

» Market Manager Application link» CRR Application Link» Certified Portlets associated with MMS and CRR applications (e.g. QSE

Forecasts and Load, Settlement statement and Invoices, etc.)

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

• DAM clearing software cannot currently handle identical bids from different QSEs. One DAM Energy Bid had to be canceled on Thursday due to this issue (the QSE was notified). A vendor defect has been created.

• When a MultiHourBlock tag is not given in an xml submission for Energy Bids/Offers, the default is supposed to be ‘false’. Currently it is defaulted to ‘true’. Workaround is to add the tag to the xml message

• If have an Energy Bid award, and request AwardSet via web services, the AwardSet is not being returned. Workaround is to use the specific award query (AwardedEnergyBid)

• EMS - issue during the data loads that we do every two weeks where in some cases it is not properly counting the data in the table that keeps track of how long your unit has been online or offline past the last data load. Affects DAM commitment decision which must respect the resource parameters (minimum online time, minimum offline time, etc.).

• Occasionally the MPIM digital certificate roles get out of sync between the various applications. The root cause is under investigation. This is the cause of the unplanned outage reported earlier.


Nodal Scorecard

MPs measured on 50% participation 7 DAM runs so far (4/1, 4/6, 4/8, 4/13, 4/15, 4/20, 4/22) Applies to all QSEs and sub-QSEs

QSEs with Resources 63/78 (54 last week) 96% generation (88% last week) COPS, TPOs do not count as participation

QSEs without Resources 104/182 (95 last week) Energy Only Bids, Energy Only Offers, PTP Obligation Bids

QSEs with Load 111/148 93% load participation (76% last week)

Next update on 5/5 will change to a 2 week rolling average pending NATF review.

MP16 DAM Participation Metric Results



DAM Settlement Overview for Apr 21

Statement and Invoice Overview

• 218 Statements/Invoices posted to QSEs

• 38 Statements/Invoices posted to CRRAHs

• 36 QSEs received Statements/Invoices for $0

CRR Overview

• There were no CRR Derations

• CRR Owners were fully funded (i.e. there were no Short Fall Charges)

General Reminders

• ERCOT will assume all invoices have been paid in full (no need to ‘submit payments’)

• Submit any questions/issues about statements, invoices, extracts or calculations to [email protected]

• Statement and Invoice XSDs posted Monday, 4/19

Operating Date 4/21/2010 Settlement Totals

Day Ahead Energy

Day Ahead Energy Sales -$11,962,251.79

Day Ahead Energy Purchases $12,477,058.76

PTP Obligation Bought in the DAM -$51,494.54

Day Ahead Congestion Rent $463,312.43

Day Ahead Make Whole

Day Ahead Make Whole Payments $0.00

Day Ahead Ancillary Services

Non-Spin Reserve Payment -$762,716.64

Non-Spin Service Charge $762,716.83

Regulation Down Payment -$83,805.93

Regulation Down Charge $83,805.87

Responsive Reserve Payment -$1,353,976.98

Responsive Reserve Charge $1,353,977.04

Regulation Up Payment -$775,274.30

Regulation Up Charge $775,274.44

Day Ahead CRR

Day Ahead Obligation $2,071.68

Day Ahead Obligation with Refunds $0.00

Day Ahead Option -$181,086.18

Day Ahead Option with Refunds -$585.06

Short Fall Charges to CRR Owners $0.00

Balancing Account Credit $283,712.87



• DAM Statements and Invoices for Operating Date 4/23 will be posted on 4/27

• 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

• RTM Initial Statements for Operating Dates 4/21 and 4/23 will be posted on 5/3

• COMS Extracts (DAMMODE and DAMCODE)

– For 4/21 DAM Settlement will be posted on Sunday 4/25

– For 4/23 DAM Settlement will be posted on Thursday 4/29


COMS Known Issues

• Combined Cycle transitions that happen in the first hour of the operating day are not being captured.

• In certain circumstances, the AEBP (Aggregated Emergency Base Point) logic is incorrect

– When Emergency starts in prior day and ends in current Operating Day, AEBP is being incorrectly calculated in the Current Operating Day

– After an Emergency stops, null values should be populated for Settlement Intervals following the end of the emergency. Currently, zeros are being populated

• In certain circumstances, the BP logic is not correct

– Need to look at the prior day's final SCED base point when an Operating Day starts under an Emergency

– BP not being calculated correctly when Emergency Basepoints start and stop twice in the same settlement interval

• When calculating AABP during a settlements interval change, the look back in the calculation (BP y -1) is not correct.

• The DCFO (DC Tie Forced Outage) bill determinant is not functioning and will be unavailable until the fix is released to NPROD



COMS Known Issues Cont’d• Currently, when creating the CRRSFTVIOL Bill Determinant, the logic looks at only Constraint Name

and Contingency Name to determine a unique violated constraint. The logic needs to be updated to include To Station and From Station. This is currently only an issue if the same constraint and contingency is binding in both SFT and DAM, but To-From direction is different in both processes

• There have been instances in Integration testing where ONDSRFLAG save recorders were not created when they should have been

• The Base Point Deviation calculation does not use AEBP as the base point in the calculation when Emergency Base Points have been issued, and it should. Also, Lodestar currently incorrectly exempts all QSEs from the Base Point Deviation Calculation when AEBP exists.

• Currently, when doing look back logic to the prior day to evaluate RUC Starts and RUC Transitions, Lodestar will not calculate correctly when a Resource to QSE relationship has changed. The new logic should look only at the Resource name, not the QSE & Resource name.

• Currently, Lodestar eligibility cannot handle more than two Combined Cycle configuration changes in a single 15 minute interval

• MMS SFT and DAM binding constraint data for an interval can have the same constraint with same contingency with different to stations and from stations. Need additional fields to store From station and To Station. These two fields will need to be included in the unique key. Unique key will be constraint, contingency name, from station and to station



Q&A

Q&A / Open Forum

Appendix

Appendix– DAM Kickoff slides– Pre- and post-DAM reports– Special Topics



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


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


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


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


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


80/120% forecasted load






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


QSE/hrUp to 10

transactions/QSE/hr

PTP Obligations

Up to 5 bids totaling

50 MW/QSE/hr


50 MW/QSE/hr None


50 MW/QSE/hr

Up to 5 bids totaling 50 MW/QSE/hr (unless

the bid represents QSE's load)


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


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


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.



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


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


Supplemental Materials

Slide 46

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



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


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.


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).


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.


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


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)


Market Trials DAM/RUC/SASM

Documents

Transcript of Market Trials DAM/RUC/SASM