NOTICE DATE:  November 25, 2015
NOTICE TYPE:  W-A112515-01 Operations
SHORT DESCRIPTION:  2015-2016 Winter Spring Voltage Profiles
INTENDED AUDIENCE:  ERCOT Market Participants
DAY AFFECTED:  December 1, 2015
LONG DESCRIPTION:  ERCOT has posted the 2015-16 Winter (December 1 - February 29) and Spring (March 1 - May 31) Voltage Profiles which include set points for each Generation Resource Point of Interconnection (POI).  ERCOT and the Transmission Service Providers (TSPs) derived these Voltage Profiles after a series of joint studies and one meeting.
All NERC Registered Generator Operators are hereby directed to comply with their specific set point in the Voltage Profile in automatic voltage control mode.  In accordance with ERCOT Operating Guide Section 2.7.4.1, Maintaining System Voltage, Generation Resources required to provide Voltage Support Service (VSS) must maintain transmission system voltage at the POI within 2% of the set point identified in the Voltage Profile when operating at less than the maximum reactive capability of the Generation Resource.  Also, in accordance with Protocols Section 3.15.3, QSE Responsibilities Related to Voltage Support, each QSE must operate its Generation Resources in automatic voltage control mode and at the set point in the posted Voltage Profile unless otherwise directed by the interconnected TSP or ERCOT.  A QSE should immediately notify ERCOT and the interconnected TSP if its Generation Resource cannot operate within 2% of the assigned Voltage Profile or alternate voltage set point directed by the interconnected TSP or ERCOT.
In accordance with NERC Reliability Standard VAR-001-4 R5, the spreadsheet posted on the Market Information System (MIS) lists voltage set points for every Generation Resource at its POI in columns (G, K) and (T, Y). In cases where the POI is located at low side the step-up transformer, voltage set points at the corresponding high side are listed in columns (L, M) and (Z,AA).
The Seasonal Voltage Profile Studies for Winter and Spring (EMIL ID NP3-152-M, Report Type ID 13263) can be accessed on the Transmission Service Provider Information page on the MIS. A Digital Certificate is required to access the MIS.
ADDITIONAL INFORMATION:  Information regarding 2015-16 Winter Spring Voltage Profiles can be found on the ERCOT Market Information System (MIS) under Voltage Profiles<https://mis.ercot.com/pps/tibco/mis/Pages/Grid+Information/Transmission> on the Grid/Transmission page.  A Digital Certificate is required to access the MIS.
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 email at [log in to unmask]<mailto:[log in to unmask]>.
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