*******TEXAS NODAL MARKET NOTICE*******
NOTICE DATE:  July 27, 2010
NOTICE TYPE:  Market Trials
SHORT DESCRIPTION:  Nodal Control of the ERCOT System (Frequency and Real-Time Markets) will be conducted next week during the 24-Hour Full-System Market and Reliability Test
INTENDED AUDIENCE:  Qualified Scheduling Entities, QSEs with Resources, Resource Entities, Nodal Accountable Executives, Nodal Transition Project Managers, Market Trial Contacts
DAYS AFFECTED:  August 3, 4 and 5, 2010
LONG DESCRIPTION:  For twenty-four (24) hours next week, command and control of the ERCOT system will be managed by Nodal systems. This 24-Hour Test window will begin on one of the following days:

 *   August 3, 2010, beginning at 12:00 CDT
 *   August 4, 2010, beginning at 12:00 CDT
 *   August 5, 2010, beginning at 12:00 CDT

Support is expected from QSEs with Resources starting at 08:00 on the day of the test through the completion of the 24-Hour test. In addition, support is expected during normal business hours (08:00 to 17:00) during all other business days during the week of the test until the test is completed.



A Market Notice will be sent two (2) business days prior to each test day to announce if that day has been targeted to conduct the test. An additional Notice will be sent on the day of the test three (3) hours prior to test start time.
In summary, ERCOT will switch over QSEs with Resources from Zonal frequency and Balancing Energy dispatch to Nodal frequency and Nodal Real-Time Markets to control the grid, noting that all settlements will be done through the Zonal systems. After the test window has been completed, Zonal systems will resume control. All control and switchover activities will be administered by ERCOT System Operators and announced as appropriate throughout the test period via hotline calls and Verbal Dispatch Instructions (VDIs).
Details of the test have been discussed on the Nodal Friday Real-Time Market calls as well as in the July 23, 2010, 24-Hour LFC Workshop. Related materials may be located at:

*         Nodal 24-Hour LFC Workshop Meeting (http://www.ercot.com/calendar/2010/07/20100723-MT)

*         Nodal Transition Readiness Center (http://nodal.ercot.com/readiness/markettrials/rtm/index.html):

o   Control Room Procedure for the Full-System LFC Test

o   Curve Creator

o   Full-System LFC Test Approach

o   Real-Time Market  / LFC Market Trials Handbook

o   White Paper - Settlement of Phase 3 LFC Testing
ACTION REQUIRED:  Please advise operators and other personnel performing Zonal market activities of the upcoming 24-Hour LFC Test and ensure that the necessary support staff will be available between 08:00 and 17:00 next week until the test is completed as well as during all hours of the 24-Hour Test window.
CONTACT:  If you have any questions, please contact either the Market Trials team by email at [log in to unmask]<mailto:[log in to unmask]> or your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask]<mailto:[log in to unmask]>.
If you are receiving email from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com<http://lists.ercot.com/>.

kd