Commercial Operations Subcommittee

April 13, 2010 Meeting

Update to TAC

May 6, 2010

Voting ItemsVoting Items

One voting item. One voting item.

Guiding Principles of the Nodal MarketGuiding Principles of the Nodal Market

Approved with AEP comments and minor changes from Approved with AEP comments and minor changes from COPs. COPs.

Nodal Update – Key ItemsNodal Update – Key Items

Jim Galvin, Chair of SEWG presented the Nodal updateJim Galvin, Chair of SEWG presented the Nodal update

Market Trials Phase 4 – Very successful! Market Trials Phase 4 – Very successful!

Basic Nodal Training has been scheduled and can be found at Basic Nodal Training has been scheduled and can be found at the following link for updated available training the following link for updated available training http://nodal.ercot.com/training/courses/index.htmlhttp://nodal.ercot.com/training/courses/index.html

Market Trails 5.0 is back on schedule. Market Trails 5.0 is back on schedule. – Integrated Credit Management targeted for May-June Integrated Credit Management targeted for May-June

timeframe timeframe

No new Risk or Issue items added to the Nodal Program Risks No new Risk or Issue items added to the Nodal Program Risks and Issues listand Issues list

NODAL PROGRAM STATUSNODAL PROGRAM STATUS

Qualification of Market Participants- 95% of MPs Qualification of Market Participants- 95% of MPs qualified:qualified:– 81 of 84 QSEs with resources qualified81 of 84 QSEs with resources qualified– 181 of 192 QSEs without resources qualified181 of 192 QSEs without resources qualified

Full Functionality testing to begin in May will result in Full Functionality testing to begin in May will result in push to get remaining QSEs qualifiedpush to get remaining QSEs qualified

Market Trials:Market Trials:– 2-CRR Auctions now completed2-CRR Auctions now completed– Three DAM markets simulated with two additional Three DAM markets simulated with two additional

this weekthis week– Strong participation in DAM trials (over 150 QSEs)Strong participation in DAM trials (over 150 QSEs)

CCWG Working Group UpdateCCWG Working Group Update– RSS Feeds on ERCOT.com – in place on RSS Feeds on ERCOT.com – in place on

www.ercot.comwww.ercot.com – select “ feeds” – select “ feeds” – CCWG Completed modifications to COPMG CCWG Completed modifications to COPMG

Section 5 and Appendix A for Market Participants Section 5 and Appendix A for Market Participants Notifications – currently in 21 day comment periodNotifications – currently in 21 day comment period

– Continued development of Creating Section 8.1 Continued development of Creating Section 8.1 Settlement Statements and Invoices (currently tabled Settlement Statements and Invoices (currently tabled at CCWG) at CCWG)

SEWG UpdateSEWG Update

SEWG Focused on NodalFocused on Nodal Reviewing Extract issues Reviewing Extract issues Completed review of UFE analysis as requested by Completed review of UFE analysis as requested by

MP. Additional analysis will be completed as MP. Additional analysis will be completed as ongoing work. ongoing work.

Nodal Settlement Algorithms – guide to be created Nodal Settlement Algorithms – guide to be created

NODAL SETTLEMENT ALGORITHMS- SAMPLENODAL SETTLEMENT ALGORITHMS- SAMPLE

VariableVariable UnitUnit DescriptionDescription IntervInterval al FrequeFrequencyncy

SourceSource ShadoShadow-ablew-able

DAESAMT DAESAMT q, q,

pp

$$ Day-Ahead Energy Amount per QSE per Settlement PointDay-Ahead Energy Amount per QSE per Settlement PointThe The payment to QSE payment to QSE qq for the cleared energy offers at Settlement for the cleared energy offers at Settlement Point Point pp for the hour. for the hour.

1 / 1 / hour hour

YesYes

DASPP DASPP pp $/$/MWMWhh

Day-Ahead Settlement Point Price per Settlement PointDay-Ahead Settlement Point Price per Settlement PointThe The DAM SPP at Settlement Point DAM SPP at Settlement Point pp for the hour. for the hour.

1 / 1 / hour hour

DAES DAES q, pq, p MWMW Day-Ahead Energy per QSE per Settlement PointDay-Ahead Energy per QSE per Settlement PointThe total The total amount of energy represented by QSE amount of energy represented by QSE qq’s cleared Three-Part ’s cleared Three-Part Supply Offers in the DAM and cleared DAM Energy-Only Offer Supply Offers in the DAM and cleared DAM Energy-Only Offer Curves at Settlement Point Curves at Settlement Point pp, excluding the offers submitted for , excluding the offers submitted for RMR Units at the same Settlement Point, for the hour.RMR Units at the same Settlement Point, for the hour.

1 / 1 / hour hour

YesYes

DAESAMTQDAESAMTQSETOT SETOT qq

$$ Day-Ahead Energy Amount QSE Total per QSEDay-Ahead Energy Amount QSE Total per QSEThe total of the The total of the payments to QSE payments to QSE qq for its cleared energy offers at all Settlement for its cleared energy offers at all Settlement Points for the hour.Points for the hour.

1 / 1 / hourhour

YesYes

$

DA Energy Sale Amount QSE Total per QSE

(DAESAMTQSETOT q)

= p

$DA Sale Amount

per QSE

(DAESAMT q,p)

Calculate Day-Ahead Energy Sale Amount QSE Total per QSE by QSE for each Operating Hour of the Operating Day.

$DA sale amount

per QSE

(DAESAMT q,p)

$/MWhDA Settlement Point Price per

Settlement Point(DASPPp)

= xMW

DA Energy Sale per QSE

(DAES q,p)

(-1) x

CalculationsCalculate Day-Ahead Energy Sale Amount by QSE and Settlement Point for each Operating Hour of the Operating Day.

DescriptionThe Day-Ahead Energy Payment is made for all cleared offers (excluding offers submitted for the RMR Units) to sell energy in the DAM, whether through three part supply offers or DAM Energy-Only Offer Curves. The payment to each QSE for each settlement point is calculated on an hourly interval.

SEWG – UFE, UPCOMING DISCUSSIONSSEWG – UFE, UPCOMING DISCUSSIONS

Significant cold weather events in February with high Significant cold weather events in February with high prices as wellprices as well– Average temperature 42.00 compared to 55.71 in Average temperature 42.00 compared to 55.71 in

2009 and 50.10 30-year average2009 and 50.10 30-year average Cost and percentage statistics will be provided in April Cost and percentage statistics will be provided in April

SEWG meetingSEWG meeting SEWG and PWG will continue to discuss and analyze SEWG and PWG will continue to discuss and analyze

UFE as part of joint sessions in the SEWG meetingsUFE as part of joint sessions in the SEWG meetings Discussions may continue on the allocation factors for Discussions may continue on the allocation factors for

UFE, however, it does not appear that consensus from UFE, however, it does not appear that consensus from one particular group (SEWG or PWG) will bring the one particular group (SEWG or PWG) will bring the issue to a PRRissue to a PRR

PWG UpdatePWG Update

As part of PWG Goals for 2010, PWG has removed As part of PWG Goals for 2010, PWG has removed “Review Weather Sensitivity Correlation and Proxy “Review Weather Sensitivity Correlation and Proxy Day Method in Lieu of AMS” – ERCOT resources, Day Method in Lieu of AMS” – ERCOT resources, system changes needed to complete. system changes needed to complete. – Cannot be completed until after Nodal.Cannot be completed until after Nodal.

10

PWG Update – New Load Profile Model implementation

PWG needs feedback from REPs on incremental cost of PWG needs feedback from REPs on incremental cost of updating round 2 models vs. benefits;updating round 2 models vs. benefits;

a.a. No model updates at all are needed, orNo model updates at all are needed, orb.b. Re-estimate existing load profiling model coefficients, orRe-estimate existing load profiling model coefficients, orc.c. Build models with new structures to address weather Build models with new structures to address weather

transitions per UFE presentation “profile discontinuity”, ortransitions per UFE presentation “profile discontinuity”, ord.d. New round 3 samples in TDSP areas that are not installing New round 3 samples in TDSP areas that are not installing

AMS or have later timelines, andAMS or have later timelines, ande.e. Profile model transition likely to be needed due to difference Profile model transition likely to be needed due to difference

in round 2 sample population mean to current profile models in round 2 sample population mean to current profile models just like the last model implementation?just like the last model implementation?

f.f. Is ERCOT forecast of load profiles needed after AMS Is ERCOT forecast of load profiles needed after AMS implementation?implementation?

No feedback was provided by MPs prior to the 3/24 PWGNo feedback was provided by MPs prior to the 3/24 PWGMtg. Further discussions for next PWG Mtg.Mtg. Further discussions for next PWG Mtg.

11

A draft PRR was presented by Direct Energy A draft PRR was presented by Direct Energy proposing that both IDR and NIDR distribution proposing that both IDR and NIDR distribution metered premises have an equal allocation factor metered premises have an equal allocation factor of 0.5of 0.5

a. No consensusa. No consensusb. Discuss about the relative allocation of b. Discuss about the relative allocation of transmission vs. distributiontransmission vs. distributionc. AMIT stakeholders discussed and decided no c. AMIT stakeholders discussed and decided no actionactiond. PWG and SEWG discussions continue.d. PWG and SEWG discussions continue.

PWG Update - UFE Allocation – Status!

Other BusinessOther Business

Calvin and Don Tucker, transitioning roles…Calvin and Don Tucker, transitioning roles… 2011 PPL – ERCOT is now accepting non-nodal 2011 PPL – ERCOT is now accepting non-nodal

projects for consideration on the 2011 PPL to projects for consideration on the 2011 PPL to heather.day@ercot.comheather.day@ercot.com.  These projects will be .  These projects will be presented for review and discussion at upcoming COPs presented for review and discussion at upcoming COPs (and other subcommittee) meetings(and other subcommittee) meetings

API File Size Constraints – 3 megabyte limit for any API File Size Constraints – 3 megabyte limit for any attachment submitted (see “API Specs for Nodal” on attachment submitted (see “API Specs for Nodal” on Nodal.com) Nodal.com)

AMS data – samples being analyzed for Board AMS data – samples being analyzed for Board presentation presentation

Questions ?Questions ?