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NOTICE DATE:  February 23, 2017


SHORT DESCRIPTION:  Reminder - Implementation Details of NPRR785


DAY AFFECTED:  March 9, 2017

LONG DESCRIPTION:  On March 9 2017, Nodal Protocol Revision Request (NPRR) 785, Synchronizing WGR and PVGR COPs with Short Term Wind and PhotoVoltaic Forecasts, will be implemented.

Upon implementation, ERCOT will automatically update the High Sustained Limit (HSL) in the Current Operating Plans (COPs) for Wind-powered Generation Resources (WGRs) with the most recently updated Short-Term Wind Power Forecast (STWPF) and HSL values in COPs for PhotoVoltaic Generation Resources (PVGRs) with the most recently updated Short-Term PhotoVoltaic Power Forecast (STPPF). An Extensible Markup Language (XML) message will be sent every time when a WGR’s or PVGR’s COP HSL value is updated with the forecast value to its corresponding Qualified Scheduling Entity (QSE). 

For hours which fall within the 168-hour rolling window for forecasting and have a forecast from ERCOT, QSEs for WGRs and PVGRs will only be able to update the COP HSL values with values that are lower than the most recent forecast for the resource. For any hour where a QSE update exists, ERCOT’s automatic COP HSL update logic will retain the lower of the most recent forecast and the QSE submitted HSL value.

For hours which do not fall within the 168-hour rolling window for forecasting or do not have a forecast from ERCOT, it is recommended that QSEs for WGRs and PVGRs, use the resource’s High Reasonability Limit (HRL) as the COP HSL value. Once such hours fall within the 168-hour rolling window for forecasting and have a forecast from ERCOT, ERCOT’s systems will automatically start updating the COP HSL value with the most recent forecast for the resource.    

Section 3.1 in Current Operating Plan Practices by Qualified Scheduling Entity  ERCOT Business Practice Manual has been revised to capture COP submission expectations for WGRs and PVGRs upon the implementation of NPRR785.

ADDITIONAL INFORMATION:  ERCOT will host a Question & Answer session via WebEx on March 1, 2017 at 1:00 pm CPT for NPRR785. Listed below are the details for this session. ERCOT invites all QSEs that represent WGRs and PVGRs to participate in this session.

WebEx Meeting Link:                                Q&A for NPRR 785

Teleconference:                                         877-668-4493

Meeting number (access code):             620 658 769

Meeting password:                                    785


Pursuant to Nodal Protocol Section 21.6, Nodal Protocol Revision Implementation, ERCOT is required to provide notice as soon as practicable, but no later than ten days prior to implementation.   

NPRR785 and associated documents can be found on the ERCOT website. 

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].

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