Review of abacus loss allocation
This presentation is the property of its rightful owner.
Sponsored Links
1 / 9

Review of Abacus Loss Allocation PowerPoint PPT Presentation


  • 59 Views
  • Uploaded on
  • Presentation posted in: General

Review of Abacus Loss Allocation. ERCOT Mandy Bauld. Summary of Allocation. Request from WMS to provide details regarding the allocation of the uplift to various market segments The appendix includes the slides presented to WMS Total Uplift amount ~ $616K

Download Presentation

Review of Abacus Loss Allocation

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Review of abacus loss allocation

Review of Abacus Loss Allocation

ERCOT

Mandy Bauld

MCWG/CWG


Summary of allocation

Summary of Allocation

  • Request from WMS to provide details regarding the allocation of the uplift to various market segments

    • The appendix includes the slides presented to WMS

  • Total Uplift amount ~ $616K

  • Allocation of Uplift Amount to Counter-Party categories

    • Counter-Parties representing both Generation and Load  $311K, a 50% share

    • Counter-Parties representing neither Generation nor Load $189K, a 31% share

    • Counter-Parties representing Load only  $60K, a 10% share

    • Counter-Parties representing Generation only  $56K, a 9% share


Summary of allocation1

Summary of Allocation

  • ERCOT system totals for Jan 2011, for each input considered in the Uplift calculations (Abacus volumes were excluded)


Allocation by volume per activity category

Allocation by Volume per Activity Category

- The “Gen and Load” category had the largest share of MWs and the largest share of the uplift

- QQ Trades captures MMA of QtoQ Sale OR purchase

- CRR captures MMA of CRR Purchase or CRR Sale/DAM Ownership

-Day-Ahead Activity captures MMA of DAM Energy Purchase or Sale


Allocation by of counter parties per activity category

Allocation by # of Counter-Parties per Activity Category

  • While “Gen and Load” is not the largest segment, it did receive the largest allocation of the uplift

- QQ Trades captures MMA of QtoQ Sale OR purchase

- CRR captures MMA of CRR Purchase or CRR Sale/DAM Ownership

-Day-Ahead Activity captures MMA of DAM Energy Purchase or Sale


Review of abacus loss allocation

  • Appendix


Counterparty max activity amounts for feb2011 default

Counterparty Max Activity & Amounts for Feb2011 Default

CP = Counter-Party

MMA = Maximum MWh Activity


Default uplift allocation overview

Default Uplift Allocation - Overview

  • Refer to Protocol Section 9.19.1, Default Uplift Invoices

  • NPRR 221 changed how defaults are uplifted to the market

    • “RTM Uplift Invoice” changed to “Default Uplift Invoice”

    • Uplifts both DAM and RTM short-pays

    • Allocates the default to all Counterparties, not just QSEs with Load

  • Allocation Methodology

    • Use True-Up data from the month PRIOR to the default month

    • For each Counterparty determine its “maximum MWh activity ratio share” (MMARS)

    • Allocate the default to each counterparty according to its MMARS

    • The maximum MWh activity ratio share is determined using the most recent DAM and CRR Auction data, and RTM True-Up data for the month prior to the default

    • Further allocate the default to QSEs or CRRAHs under the counterparty according to their pro-rata share of the MWhs that contributed to the MMARS (necessary because ERCOT only settles with QSEs / CRRAHs)


Default uplift allocation formula 9 19 1 2

Default Uplift Allocation – Formula (9.19.1 (2))

(2) Each Counter-Party’s share of the uplift is calculated using True-Up Settlement data for each Operating Day in the month prior to the month in which the default occurred, and is calculated as follows:

DURSCP cp =TSPA * MMARS cp

Where:

MMARS cp = MMA cp / MMATOT

MMA cp = Max { ∑mp (URTMG mp+ URTDCIMP mp),  RTM Metered Generation and DC Tie Imports

∑mp URTAML mp,  RTM Adjusted Metered Load

∑mpURTQQES mp,  RTM QSE to QSE Energy Sales

∑mp URTQQEP mp,  RTM QSE to QSE Energy Purchases

∑mp UDAES mp,  DAM Energy Sales (TPO and Energy-Only)

∑mp UDAEP mp,  DAM Energy Purchases

∑mp URTOBL mp,  RTM PTP Obligations

∑mp (UDAOPT mp+ UDAOBL mp+UOPTS mp+UOBLS mp), CRR Auction Sales & CRR Ownership in DAM

∑mp (UOPTP mp+ UOBLP mp)}  CRR Auction Purchases

MMATOT = ∑cp (MMA cp)

Where:

URTMG mp = ∑p, r, i (RTMG mp, p, r, i), excluding RTMG for RMR Resources and RTMG in Reliability Unit Commitment (RUC)-Committed Intervals for RUC-committed Resources

URTDCIMP mp = ∑p, i (RTDCIMP mp, p, i) / 4

URTAML mp = ∑p, i (RTAML mp, p, i)

URTQQES mp = ∑p, i (RTQQES mp, p, i) / 4

URTQQEP mp = ∑p, i (RTQQEP mp, p, i) / 4

UDAES mp = ∑p, h (DAES mp, p, h)

UDAEP mp = ∑p, h (DAEP mp, p, h)

URTOBL mp = ∑(j, k), h (RTOBLmp, (j, k), h)

UDAOPT mp = ∑(j, k), h (DAOPTmp, (j, k), h)

UDAOBL mp = ∑(j, k), h (DAOBLmp, (j, k), h)

UOPTS mp = ∑(j, k), h (OPTSmp, (j, k), h)

UOBLS mp = ∑(j, k), h(OBLSmp, (j, k), h)

UOPTP mp = ∑(j, k), h (OPTPmp, j, h)

UOBLP mp = ∑(j, k), h (OBLPmp, (j, k), h)


  • Login