***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. *****

NOTICE DATE:  May 26, 2017

NOTICE TYPE:  M-C052617-01 Release - Wholesale

SHORT DESCRIPTION:  Implementation Details for NPRR801

INTENDED AUDIENCE:  ERCOT Market Participants

DAYS AFFECTED:  June 27 – 29, 2017

LONG DESCRIPTION:  ERCOT will be implementing Energy Management System (EMS), Market Management System (MMS), and settlement changes for Nodal Protocol Revision Request (NPRR) 801, Non-Controllable Load Resource MW in PRC, between June 27 and 29, 2017.

NPRR801 revises the Physical Responsive Capability (PRC) calculation in EMS from including the Responsive Reserve (RRS) service MW responsibility from Load Resources controlled by high-set under frequency relays to including all MW from these Load Resources from their current output to their Low Power Consumption (LPC) capped at 150% of the Qualified Scheduling Entity’s (QSEs) RRS responsibility from non-Controllable Load Resources.

The Operating Reserve Demand Curve (ORDC) reserves are adjusted in the MMS and the Other Binding Document, “Methodology for Implementing Operating Reserve Demand Curve (ORDC) to Calculate Real-Time Reserve Price Adder”, to align with the PRC change. The Ancillary Service imbalance Settlement is changed to align with the change to the ORDC reserves.

New Settlement Calculation Revisions:

6.7.5    Real-Time Ancillary Service Imbalance Payment or Charge (paragraph 7)

Real-Time Capacity from Non-Controllable Load Resources carrying Responsive Reserve for the QSE

RTNCLRCAPq = Min(Max(RTNCLRNPC q – RTNCLRLPC q, 0.0), RTNCLRRRS q * 1.5)

 

RTNCLRRRS q = SYS_GEN_DISCFACTOR *RTNCLRRRSR q, r, p 

 

Real-Time Controllable Load Resource Non-Spin Responsibility for the QSE

RTCLRNSRESPq = SYS_GEN_DISCFACTOR *RTCLRNSRESPR q, r, p 

 

New Settlement Bill Determinants:

 

Bill Determinant

Short Description

Extract

Extract Table

RTCLRNSRESPR

Real-Time Controllable Load Resource Non-Spin Responsibility for the Resource

RTM CODE

MKTINPUTHEADER MKTINPUTINTERVAL

RTNCLRRRSR

Real-Time Non-Controllable Load Resource Responsive Reserve

RTM CODE

MKTINPUTHEADER MKTINPUTINTERVAL

RTNCLRRRS

Real-Time Non-Controllable Load Resources Responsive Reserve for the QSE

RTM CODE

RTMOUTPUTHEADER RTMOUTPUTINTERVAL

 

ACTION REQUIRED:  Implement changes to shadow Settlement systems for NPRR801.

ADDITIONAL INFORMATION:  NPRR801 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].

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.

 

 

 

 

sa