Market Trials Real-Time Market / LFC

http://nodal.ercot.com 1

Market TrialsReal-Time Market / LFC

Weekly Update

June 11, 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

• Antitrust Admonition

• Environment Report– Planned / unplanned outages – Known Issues

• Standing Reports and Updates– General reminders / updates– RTM / LFC Update– LFC Calendar Update– State Estimator Convergence Statistics

• Question and Answers / General Discussion

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



Environment Report: Planned / Unplanned Nodal Outages

Planned Outages• 06/11/2010 8:30 A.M – 01:00 P.M.

– Application patches are being deployed for EWS and OS systems and as a result will affect availability of following services:

• EWS ( Web Services)• OS UI• MM UI

• 06/12/2010 9:00 A.M – 12:30 P.M.– MM UI and CRR systems will be unavailable during this window in order to support

application patch installations. .The API service will be continue to be available during this timeframe.

Unplanned Outages• 06/10/2010 07:55 A.M – 09:00 A.M.

– Market system submissions were impacted as result of an application server performance degradation. Users may have encountered timeout errors during this submission window.

• 06/08/2010 06:00 P.M.– Users were unable to fully view SASM Obligation via the Market Manager system. A

defect has been identified and being addressed in upcoming UI release on 06/12/10.• 06/08/2010 06:30 P.M.

– Users encountered errors when trying to retrieve SASM Awards via EWS and MM UI.


Known Issues

New Open Issues• NP4-159-Load Forecast Distribution Factors (MIS Secure Report)

– This report provides hourly data for the next seven days—the hourly data is being duplicated for each hour of the seventh day.

– Affects CDR

• NP6-905-Settlement Point Prices at Resource Nodes and Hubs and Load Zones (MIS Public Report)

– In some reports, the same data is being reported for different intervals

– Whenever data is unavailable for the current interval, the CDR query picks up the most recent data to populate the report

– the enhancement will provide for a verification of the current interval against the available data and will generate an alert

– Affects CDR


Known Issues

New Open Issues (continued)• NP8-501-Monthly Resource Energy Deployment Performance Report (MIS

Certified Report)

– External reports are not creating

– Affects CDR

• Dated EMS Alerts

– Some MPs have been receiving dated EMS alerts

– These alerts may be ignored

– ERCOT investigating root cause and fix


Known Issues

Recently Closed Issues• NP8-143 QSE Ancillary Service Capacity Monitor

– EMS issue was opened to add new Columns to NP8-143 because the Report was only displaying the Undeployed Regulation and was not capturing Total Regulation Up/Down Responsibility for the QSEs

– Affected CDR & EMS


Standing Reports and Updates: General Reminders / Updates

Reminders/Updates

• Real-Time Known Issues List

– The Updated Real-Time Known Issues List (as of 6/10) will deploy overnight to the Readiness Center (http://nodal.ercot.com/readiness/markettrials/rtm/index.html).

• Network Model Update

– The current system loaded from the model 06/10/10

– Next scheduled load is 06/15/10

• SPP and RTRMPR Calculations

– The updated tracking document (as of 6/10) for SPP and RTRMPR Issues is available on the Readiness Center at http://nodal.ercot.com/readiness/markettrials/rtm/index.html



Reminders/Updates (continued)

• GREDP Results from the 2-Hour LFC Test

– ERCOT began distributing individual GREDP results to QSEs on 6/10

– Plan to have all results distributed by COB 6/11

• 8-Hour LFC Workshop Update

– The Workshop presentation has been updated on the June 8 meeting detail (http://www.ercot.com/calendar/2010/06/20100608-MT)

– Purpose of the update was to correct/clarify the slide describing NA statuses in nodal Resource Limit Calculator (RLC) (see updates on next slide)



Resource Status (RST) set to NA• The MMS-generated COP Consistency Check will generate an alert whenever the

Resource Status (RST) in the COP is inconsistent with the RST telemetered in Real-Time• Because MMS receives the Real-Time RST from the Resource Limit Calculator rather than

from SCADA, the RST identified in the alert is sometimes “NA”• RLC will automatically change the telemetered RST to NA when:

• The telemetered RST is 0 (RST=0 appears in EMS as “NA” but is not directly changed to NA by RLC)

• The telemetered RST indicates offline (OUT, OFFNS, OFF, and EMR) but MW> 0 a certain threshold

• If unit is generating but RST is OFF, SCED cannot see the unit• When RLC changes such an RST to NA, SCED can see the unit and can

dispatch it as an online Resource• HDL and LDL are set to current output – SDRAMP*5. SCED sets the base

point equal to these revised HDL/LDL• The telemetered RST quality is stale/suspect• The telemetered RST quality is good and is not in the range of valid RST codes per

Nodal Protocols 6.4.5, Resource Status, or it is 0• When RST is NA, the HDL/LDL are set to MW output – SDRAMP*5, and the Base Point is

set to HDL/LDL

04/21/23


Real Time Market / LFC Update



SCED Week 19• At $2250 price cap for 29 intervals

• 9 on Monday• 20 on Wednesday

• PI Outage Fri – Mon (no data shown below)



SCED Week 19• Thursday4:35 am - 6:55 am 1800 Leon Switch - Flat Creek 138KV12:05 pm - 10:00 pm Duncanville South - Cedar Hill 138KV 11:15 pm - 11:30 pm West Denton - Jim Cristal 138KV

Friday12:00 am - 1:15 am West Denton - Jim Cristal 138KV 11:00 am - 10:00 pm Duncanville South - Cedar Hill 138KV 11:20 am - 3:35 pm Odessa North 138/69KV autotransformer1:40 pm - 2:15 pm Ingleside Cogen Switch - Dupont PP1 Ingleside 138KV 10:30 pm - 11:00 pm Leon Switch - Flat Creek 138KV

Saturday11:10 am - 1:20 pm Wolf Hollow - Rocky Creek 345KV 12:50 am - 4:30 pm Leon Switch - Flat Creek 138KV

Sunday1:10 pm - 10:05 pm Wolf Hollow - Rocky Creek 345KV 1:20 pm - 10:05 pm Duncanville South - Cedar Hill 138KV

Monday11:55 am - 2:55 pm Wolf Hollow - Rocky Creek 345KV 12:25 pm - 7:55 pm 931_Duncanville South - Cedar Hill 138KV 2:00 pm - 5:50 pm Hearn 138/69KV autotransformer 2:20 pm - 4:15 pm Cagnon 345/138KV autotransformer

Tuesday12:55 pm - 6:20 pm Duncanville South - Cedar Hill 138KV 2:00 pm - 5:05 pm Hearn 138kV/69kV autotransformer

Wednesday7:10 pm - 7:15 pm Odessa North - Odessa Basin Switch 69KV

Missed MIS LMP Reports


• Release due to Production system 6/25• APP_STATUS trigger bug fix to resolve missed individual, isolated LMP

reports• Blocks of time bolded below• 6/5 Event manager configuration• 6/7 Lost connection• 6/8 MMS server out of memory

6/3/10 15:00:32 6/5/10 8:55:19 6/7/10 15:00:33 6/8/10 14:10:30 6/10/10 7:15:166/4/10 8:00:32 6/5/10 9:00:34 6/7/10 15:05:28 6/8/10 14:15:25 6/10/10 8:35:306/4/10 8:05:17 6/5/10 9:05:19 6/7/10 15:10:27 6/8/10 14:20:26 6/10/10 8:40:286/4/10 9:05:19 6/5/10 9:10:18 6/7/10 15:15:26 6/8/10 14:25:266/4/10 9:20:17 6/5/10 9:15:18 6/7/10 15:20:27 6/8/10 14:30:286/4/10 9:25:21 6/5/10 10:30:19 6/7/10 15:25:26 6/8/10 14:35:35

6/4/10 13:25:26 6/6/10 11:25:26 6/7/10 15:30:266/4/10 16:55:25 6/7/10 15:35:346/4/10 17:55:26

Hub vs Zone Settlement Point Prices


DELIVERY_TIME ZONE HUB LOADZONEDELIVERY_TIME ZONE HUB LOADZONEDELIVERY_TIME ZONE HUB LOADZONE6/3/2010 4:45 HOUSTON 230.85 28.93 6/3/2010 4:45 NORTH 230.62 38.25 6/3/2010 4:45 SOUTH 232.09 23.946/3/2010 5:00 HOUSTON 351.35 33.97 6/3/2010 5:00 NORTH 351.98 48.64 6/3/2010 5:00 SOUTH 351.9 26.136/3/2010 5:15 HOUSTON 352.07 34.78 6/3/2010 5:15 NORTH 352.7 49.44 6/3/2010 5:15 SOUTH 352.57 26.936/3/2010 5:30 HOUSTON 353.82 36.51 6/3/2010 5:30 NORTH 354.44 51.18 6/3/2010 5:30 SOUTH 354.34 28.676/3/2010 5:45 HOUSTON 72.26 23.66 6/3/2010 5:45 NORTH 72.44 26.89 6/3/2010 5:45 SOUTH 72.33 22.076/3/2010 6:00 HOUSTON 75.96 23.79 6/3/2010 6:00 NORTH 76.08 27.54 6/3/2010 6:00 SOUTH 76.04 21.976/3/2010 6:15 HOUSTON 141.46 25.3 6/3/2010 6:15 NORTH 141.61 33.63 6/3/2010 6:15 SOUTH 141.64 21.266/3/2010 6:30 HOUSTON 224.93 29.23 6/3/2010 6:30 NORTH 225.26 43.42 6/3/2010 6:30 SOUTH 225.27 22.176/3/2010 6:45 HOUSTON 230.37 29.46 6/3/2010 6:45 NORTH 230.72 44.06 6/3/2010 6:45 SOUTH 230.68 22.16/3/2010 7:00 HOUSTON 230.49 29.6 6/3/2010 7:00 NORTH 230.86 44.2 6/3/2010 7:00 SOUTH 230.81 22.23

6/3/2010 23:30 HOUSTON 11.77 22.14 6/3/2010 23:30 NORTH 11.75 21.92 6/3/2010 23:30 SOUTH 11.75 22.086/4/2010 0:30 HOUSTON 8.76 23.49 6/4/2010 0:30 NORTH 8.75 23.18 6/4/2010 0:30 SOUTH 8.77 23.46/4/2010 0:45 HOUSTON 2.71 21.81 6/4/2010 0:45 NORTH 2.67 21.4 6/4/2010 0:45 SOUTH 2.67 21.696/4/2010 1:00 HOUSTON 2.71 21.22 6/4/2010 1:00 NORTH 2.67 20.82 6/4/2010 1:00 SOUTH 2.67 21.11

6/5/2010 11:15 HOUSTON 13.5 33.79 6/5/2010 11:15 NORTH 13.47 31.21 6/5/2010 11:15 SOUTH 13.46 33.096/5/2010 11:30 HOUSTON -23 45.41 6/5/2010 11:30 NORTH -23.09 36.69 6/5/2010 11:30 SOUTH -23.09 43.046/5/2010 11:45 HOUSTON -21.01 48 6/5/2010 11:45 NORTH -21.11 39.2 6/5/2010 11:45 SOUTH -21.1 45.616/5/2010 12:00 HOUSTON -13.01 58.39 6/5/2010 12:00 NORTH -13.1 49.29 6/5/2010 12:00 SOUTH -13.1 55.936/5/2010 12:15 HOUSTON -19.85 65.43 6/5/2010 12:15 NORTH -19.97 54.56 6/5/2010 12:15 SOUTH -19.96 62.486/5/2010 12:30 HOUSTON -30.48 64.56 6/5/2010 12:30 NORTH -30.61 52.45 6/5/2010 12:30 SOUTH -30.6 61.286/5/2010 12:45 HOUSTON -33.63 312.08 6/5/2010 12:45 NORTH -34.09 268.02 6/5/2010 12:45 SOUTH -34.04 300.146/5/2010 13:00 HOUSTON -33.64 310.27 6/5/2010 13:00 NORTH -34.09 266.44 6/5/2010 13:00 SOUTH -34.05 298.396/5/2010 13:15 HOUSTON -41.26 211.36 6/5/2010 13:15 NORTH -41.6 179.16 6/5/2010 13:15 SOUTH -41.57 202.636/5/2010 13:30 HOUSTON -5.74 288.19 6/5/2010 13:30 NORTH -6.04 250.72 6/5/2010 13:30 SOUTH -6.07 278.03

6/7/2010 12:30 NORTH 1547.23 1532.94 6/7/2010 14:30 SOUTH 58.94 33.44

• Intervals in last week for which Hub and Zone prices differed by > $10

Hub vs Zone Settlement Point Prices


DELIVERY_TIME ZONE HUB LOADZONEDELIVERY_TIMEZONE HUB LOADZONE6/7/2010 14:45 SOUTH 59.48 19.35 6/6/2010 18:30 WEST 291.93 29.676/7/2010 15:00 SOUTH 58.55 18.41 6/6/2010 18:45 WEST 296.87 34.556/7/2010 15:15 SOUTH 58.35 18.21 6/6/2010 19:00 WEST 140.12 0.516/7/2010 15:30 SOUTH 57.82 17.68 6/6/2010 19:15 WEST 301.81 46.226/7/2010 15:45 SOUTH 56.06 22.16 6/6/2010 19:30 WEST 302.94 40.536/7/2010 16:15 SOUTH 55.02 28.71 6/6/2010 19:45 WEST 301.73 39.29

6/6/2010 20:00 WEST 130.68 1.456/6/2010 20:15 WEST 305.81 49.346/6/2010 20:30 WEST 330.43 68.196/6/2010 20:45 WEST 89.8 13.016/6/2010 21:00 WEST 57.57 12.256/6/2010 21:15 WEST 61.44 15.736/6/2010 21:45 WEST 53.45 36.546/6/2010 22:00 WEST 54.23 13.576/6/2010 22:15 WEST 56.81 28.646/7/2010 12:00 WEST 66.34 52.636/7/2010 12:15 WEST 268.4 7.476/7/2010 12:30 WEST 1544.04 1281.086/7/2010 12:45 WEST 1589.61 1394.246/7/2010 13:00 WEST 747.06 632.116/7/2010 13:15 WEST 1528.82 1303.256/7/2010 13:30 WEST 1847.23 1614.036/7/2010 13:45 WEST 87.77 41.86/7/2010 14:00 WEST 59.13 17.746/7/2010 14:15 WEST 57.98 20.916/7/2010 14:30 WEST 58.94 19.376/7/2010 14:45 WEST 59.46 14.126/7/2010 15:00 WEST 58.53 18.48

Wednesday 6/9 Nodal Submission Evaluation


• SCED dispatch vs. Actual Output• 18 of 79 QSEs producing average of at least 10% above Energy Offer

Curve MW (2700 MW)• 19 of 75 QSEs producing average of at least 10% above Energy Offer

Curve MW (4100 MW) during $2250 intervals

• Zonal Energy Schedule/BES Bids vs Nodal EOC (Hour 9 results)• 33 of 75 QSEs Zonal Energy Schedule not within EOC Range (3500 MW)• 37 of 75 QSEs BES MW not within EOC Range (5000 MW)• 37 of 75 QSEs BES Prices and EOC Prices do not intersect

• Zonal Prices vs Nodal Prices• When EOC in Nodal not exhausted, prices generally $5 to $15 higher first

half of day; $10 lower to $10 higher second half of day


LFC Calendar Update


LFC Calendar Update

LFC Calendar (MT5) – Upcoming Key Dates

• Week of June 7

– Distribute individual QSE performance results from the 2-Hour LFC Test (June 10-11)

– Distribute Market Notice announcing the upcoming 8-Hour LFC Test (June 16-18)

• Week of June 14

– MPs submit EOCs reflective of Zonal June 14-18

• Curve Creator tool is posted on Readiness at http://nodal.ercot.com/readiness/markettrials/rtm/index.html

– Conduct the 8-Hour LFC Test (June 16 – 18 timeframe)

– Publish the 48-Hour LFC operational test scenarios to the Readiness Center

• Week of June 21

– Publish formal 2-Hour Test Report to the Readiness Center

http://nodal.ercot.comhttp://nodal.ercot.com

LFC – Reminders

Test Time & Date – • The 8-Hour LFC Test will be conducted on June 16th, 17th or 18th

• The actual test will start no earlier then 10:00 AM • Market Notices & Hotline Call:

– A Market Notice will be sent Friday, June 11 to announce upcoming test– A follow-up Market Notice will be sent two days prior to the actual test – A final Market Notice will be sent on the day of the test – A hotline call will be made on the day of the test to communicate the start

time of the test (approximately 3 hours prior to start)– A WebEx conference to allow Market Participants to monitor the 8-Hour LFC

Test will be provided—a Market Notice with WebEx details will be sent to Nodal Transition Project Managers the week of the test

http://nodal.ercot.comhttp://nodal.ercot.com

LFC – Reminders

Participation– • All Generation Resources are required to participate in the test

– Exceptions due to modeling issues• Market Participants will need to ensure that all EOCs are submitted for the week

of the test (week of June 14)– ERCOT will reach out to MPs that do not have their EOCs submitted by the

beginning of the test week

MP Support – • Each MP needs to have their experts on hand during normal business hours

(8:00 am – 5:00 pm) each business day during the week of the test• During the day of the test, the hours of support will be extended to 7:00 am –

6:00 pm• These experts must be able to support:

– ICCP– EOCs, Inc/Dec Offers, and Output Schedules– LFC


LFC – Reminders

Artifacts for the 8-Hour LFC Test

• The 8-Hour LFC Test Approach document and related artifacts are posted on the Readiness Center at http://nodal.ercot.com/readiness/markettrials/rtm/index.html

• Artifacts include:

– 8-Hour LFC Test Approach

– Control Room Procedure for the Full System LFC Test

– White Paper - Settlement of Phase 3 LFC Testing


State Estimator Convergence


State Estimator Convergence Update

State Estimator Daily Convergence Statistics(these percentages are graphed in the next slide)

Month Day % Convergence (Including Solved w/ Mismatch)

MAY 31 98.96

JUN 1 99.31

JUN 2 99.31

JUN 3 100

JUN 4 98.97

JUN 5 99.65

JUN 6 99.66

JUN 7 99.65

JUN 8 99.31

JUN 9 99.65


State Estimator Convergence Update


Q&A

Q&A / Open Forum


Appendix


URLS and EMAIL ADDRESS FOR SUPPORT

• URLs for accessing the Nodal Production systems

– MIS: https://mis.ercot.com/pps/tibco/mis/

– Market Manager: https://mis.ercot.com/pps/tibco/mis/ Click the ‘Applications’ tab in the upper menu. Link is in the ERCOT Applications portlet

– CRR: https://mis.ercot.com/pps/tibco/mis/ Click the ‘Markets’ Link in the upper menu. Click CRR in the Market sub menu

– EWS: https://misapi.ercot.com/2007-08/Nodal/eEDS/EWS


Market Trials Handbooks

• Market Trials Handbooks– Available on the Readiness Center at the following links

• Real Time Market / LFC covering Phase http://nodal.ercot.com/readiness/markettrials/rtm/index.html

• Outage Scheduler covering Phase http://nodal.ercot.com/readiness/markettrials/os/index.html

• CRR covering release Phase http://nodal.ercot.com/readiness/markettrials/crr/index.html

• Settlements / COMs covering Phase http://nodal.ercot.com/readiness/markettrials/coms/index.html

• Day Ahead Market http://nodal.ercot.com/readiness/markettrials/dam/index.html

LFC – Test Overview & Setup: Quick Start Resources

• Deployment of Balancing Energy Service (BES) Capable NSRS for Quick Start resources during the LFC test

– Prior to the resource being asked to come online in Zonal, the QSE should:• telemeter a Non-Spin Schedule and Responsibility (NSSC and NSRS) of 0• telemeter a resource status showing the resource as offline; and• telemeter an LSL of 0

– If the QSE receives an energy deployment in Zonal, the QSE should start that resource and telemeter a resource status of online (ON) as soon as they are capable

– Once the resource is “ON” with net MW > 0, the resource will be available for SCED dispatch and the resource will be dispatched based on the energy offer curve

– After the resource reaches it’s physical LSL, the QSE should reflect that value through the telemetered LSL and should leave it at that value

– Once Zonal indicates that the resource should go offline, the resource should begin ramping down

– When the resource goes offline, the QSE should update the telemetered resource status to offline and then change the telemetered LSL to 0

• The QSE also has the option to not provide BES-Capable NSRS during the hours of the test

LFC – Test Overview & Setup: Congestion Management

• Manual dispatch instructions during the LFC test

– Beginning two hours prior to the LFC test, ERCOT will stop using OC1s and OOMEs and plans to use OC3s to manage congestion

• The one exception to this is that ERCOT will continue to use OC1s for the W-N stability limit (non-thermal IROL for NERC)

• ERCOT has created and tested a constraint for this limit in the Nodal system which can be activated for SCED as needed and should provide similar dispatch to the OC1s

– ERCOT may be required to use Zonal manual dispatch instructions to solve congestion

– ERCOT will set the Nodal Base-Point to match the Zonal manual dispatch instruction

– The QSE will continue to follow the Nodal Base Point if they are still under Nodal control

Documents

Market Trials Real-Time Market / LFC