*******
NOTICE
DATE: June
13, 2008
NOTICE
TYPE: General
CLASSIFICATION: Public
SHORT
DESCRIPTION:
Temporary Change to LFC Regulation Deployment for the LFC Tests on June
19 and the week of June 23.
INTENDED
AUDIENCE:
LFC Contacts and Accountable Executives
DAY
AFFECTED:
Beginning June 13, 2008
LONG
DESCRIPTION:
ERCOT will honor the ten minute ramp rate during the test by modifying
the LFC Regulation calculation (ten instead of five minutes ramp) and by
temporarily modifying the LFC SURAMP and SDRAMP
calculations.
Therefore:
•
SURAMP = Ramp Rate – (Regulation Up AS
Responsibility / 10)
•
SDRAMP = Ramp Rate – (Regulation Down AS
Responsibility / 10)
•
LFC will calculate Regulation to be
deployed over a 10 minute ramp rate not a 5 minute.
ACTION
REQUIRED:
All QSEs should ensure that their Nodal ancillary service
responsibilities match their Zonal ancillary service obligations during normal
business hours starting on June 16, 2008 through June 27, 2008. During this time QSEs must also ensure
that their Responsive Reserve Service and Non-Spin schedules are being correctly
calculated. Lastly, QSEs must
ensure that their Regulation Service participation factors are being sent to
ERCOT and properly represent the manner in which the QSE is deploying it’s
Regulation dispatch signals. As a
reminder, the participation factors are a fraction between 0 and 1 and should
sum to 1 within a QSE.
ADDITIONAL
INFORMATION:
This change will keep Nodal in line with Zonal for the handling of
Regulation Deployments for the testing planned the next two
weeks.
CONTACT:
If you have any questions, please
contact 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
e-mail at [log in to unmask].
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