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NOTICE DATE:  May 20, 2014

NOTICE TYPE:  M-A050114-02 NPRR

SHORT DESCRIPTION:  Reminder: Settlement implementation details for NPRR555

INTENDED AUDIENCE:  ERCOT Market Participants and Settlement Personnel

DAY AFFECTED:  June 1, 2014

LONG DESCRIPTION:  Effective June 1, 2014, ERCOT will implement Nodal Protocol Revision Request (NPRR) 555, Load Resource Participation in Security-Constrained Economic Dispatch.  NPRR555 enables Demand response from Controllable Load Resources, as re-defined, to be Dispatched by Security-Constrained Economic Dispatch (SCED) based on a Real-Time Market (RTM) Energy Bid.

ACTION REQUIRED:  Implement changes to shadow settlement systems in compliance with NPRR555.

ADDITIONAL INFORMATION:  Detailed description included in the Market Notice below. 

NPRR555  with associated documents can be found on the ERCOT website.

 

 

NOTICE DATE:  May 1, 2014

NOTICE TYPE:  M-A050114-01 NPRR

SHORT DESCRIPTION:  Settlement implementation details for NPRR555

INTENDED AUDIENCE:  ERCOT Market Participants and Settlement Personnel

DAY AFFECTED:  June 1, 2014

LONG DESCRIPTION:  Effective June 1, 2014, ERCOT will implement Nodal Protocol Revision Request (NPRR) 555, Load Resource Participation in Security-Constrained Economic Dispatch.  NPRR555 enables Demand response from Controllable Load Resources, as re-defined, to be Dispatched by Security-Constrained Economic Dispatch (SCED) based on a Real-Time Market (RTM) Energy Bid.

Base Point Deviation Charges

 

Controllable Load Resources that participate in SCED will be subject to Base Point Deviation charges  as follows:

If AABP_<Q>_<R>_<SP> * (¼)   >  ATPC_<Q>_<R>_<SP>

Then perform the calculation process for under- consumption (Protocol Section 6.6.5.1.1.4)

Otherwise perform the calculation process for over- consumption (Protocol Section 6.6.5.1.1.3)

 

6.6.5.1.1.3            Controllable Load Resource Base Point Deviation Charge for Over Consumption

(1) ERCOT shall charge a QSE for a Controllable Load Resource for over-consumption that exceeds the following tolerance.  The tolerance is the greater of:

(a)       XO% of the average of the Base Points in the Settlement Interval adjusted for any Ancillary Service deployments; or

(b)       YO MW for power consumption above the average of the Base Points in the Settlement Interval adjusted for any Ancillary Service deployments.

(2) The Controllable Load Resource Base Point Deviation Charge for over-consumption variables XO and YO shall be subject to review and approval by TAC and shall be posted to the MIS Public Area no later than three Business Days after TAC approval.

(3) The charge to each QSE for non-excused over-consumption for each Controllable Load Resource during a 15-minute Settlement Interval in which the Controllable Load Resource has received a Base Point is calculated as follows:

 

BPDAMT q, r, p, i = -1 * Min (PRZ1, RTSPPp,i) * Min (1, KP1) * OCONSM q, r, p, i

Where:

OCONSM q, r, p, i   = Max [0, ATPCq, r, p, i  - ¼* Max (((1 + KLR1) * AABP q, r, p, i), (AABP q, r, p, i + QLR1)))]

ATPC q, r, p, i         =       ((AVGTPC5M q, r, p i ,y) / 3) * ¼

 

6.6.5.1.1.4            Controllable Load Resource Base Point Deviation Charge for Under Consumption

(1) ERCOT shall charge a QSE for a Controllable Load Resource for under-consumption if the average telemetered power consumption is below than the lesser of:

(a)       [100-XU]% of the average of the Base Points in the Settlement Interval adjusted for any Ancillary Service deployments; or

(b)       The average of the Base Points in the Settlement Interval adjusted for any Ancillary Service deployments minus YU MW.

(2) The Controllable Load Resource Base Point Deviation Charge for under-consumption variables XU and YU shall be subject to review and approval by TAC and shall be posted to the MIS Public Area no later than three Business Days after TAC approval.

(3) The charge to each QSE for non-excused under-consumption of each Controllable Load Resource during a 15-minute Settlement Interval in which the Controllable Load Resource has received a Base Point is calculated as follows:

 

BPDAMT q, r, p, i = Max (PRZ2, RTSPP p, i) * UCONSM q, r, p, i

Where:

UCONSM q, r, p, i   = Max [0, [Min ((1 – KLR2) * ¼* AABP q, r, p, i ), ¼ * (AABP q, r, p, i – QLR2)) – ATPCq, r, p, i]]

ATPC q, r, p, i         =       ((AVGTPC5M q, r, p i ,y,) / 3) * ¼

 

New Settlement Bill Determinants:

The following new bill determinants will be implemented for NPRR555:

Bill Determinant

Short Description

Extract

Extract Table

ATPC

Average Telemetered Power Consumption

SID/RTM MODE

MKTINPUTHEADER
MKTINPUTSCALAR

CLRASFLAG

Flag that indicates that the Controllable Load Resource has Ancillary Service responsibility

SID/RTM CODE

MKTINPUTHEADER
MKTINPUTINTERVAL

CLRDISPFLAG

Flag that indicates the computed Base Point is equal to the snapshot of its telemetered power consumption for all SCED runs during the Settlement Interval

SID/RTM CODE

MKTINPUTHEADER
MKTINPUTINTERVAL

LROFLAG

Flag that indicates that the Controllable Load Resource’s telemetered Resource Status is set to OUTL

SID/RTM CODE

MKTINPUTHEADER
MKTINPUTINTERVAL

OCONSM

Over-Consumption Volumes per QSE per Settlement Point per Controllable Load Resource

RTM CODE

RTMOUTPUTHEADER

RTMOUTPUTINTERVAL

UCONSM

Under Consumption Volumes per QSE per Settlement Point per Controllable Load Resource

RTM CODE

RTMOUTPUTHEADER

RTMOUTPUTINTERVAL

 

New Settlement Factor/FactorValue:

The following new Factors will be implemented for NPRR555:

Factor

Short Description

Extract

Extract Table

KP1

The coefficient applied to the Settlement Point Price for over-consumption charge

PRDE

Factor/FactorValue

KLR1

The percentage tolerance for over-consumption of a Controllable Load Resource when the CLR has Ancillary Service responsibility

PRDE

Factor/FactorValue

KLR1_NOAS

The percentage tolerance for over-consumption of a Controllable Load Resource when the CLR does not have Ancillary Service responsibility

PRDE

Factor/FactorValue

KLR2

The percentage tolerance for under-consumption of a Controllable Load Resource when the CLR has Ancillary Service responsibility

PRDE

Factor/FactorValue

KLR2_NOAS

The percentage tolerance for under-consumption of a Controllable Load Resource when the CLR does not have Ancillary Service responsibility

PRDE

Factor/FactorValue

PRZ1

The minimum price to use for the charge calculation when the CLR over consumed

PRDE

Factor/FactorValue

PRZ2

The maximum price to use for the charge calculation when the CLR under consumed

PRDE

Factor/FactorValue

QLR1

The MW tolerance for over-consumption of a Controllable Load Resource

PRDE

Factor/FactorValue

QLR2

The MW tolerance for under-consumption of a Controllable Load Resource

PRDE

Factor/FactorValue

 

ACTION REQUIRED:  Implement changes to shadow settlement systems in compliance with NPRR555.

ADDITIONAL INFORMATION:  NPRR555  with associated documents can be found on the ERCOT website.

Information on upcoming releases can be found on the Project Priority List (PPL).

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.

 

 

 

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