Pcrr release mechanism examples
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PCRR release mechanism examples. December 3, 2007. Business process clarification NPRR – “release mechanism”. ERCOT proposes to remove the “release mechanism” language in the protocols as existing design provides a more elegant solution

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PCRR release mechanism examples

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PCRR release mechanism examples

December 3, 2007


Business process clarification NPRR – “release mechanism”

  • ERCOT proposes to remove the “release mechanism” language in the protocols as existing design provides a more elegant solution

  • The following slides aim to explain the “release mechanism” compared to proposed implementation

  • Assumptions made in this example (which may not exist in reality):

    • The network capacity for 2010-2011 is the same for all months

    • The nominated MW is the same for all months

    • The nominated MW amount is fully allocated; no monthly true-up allocation required

TPTF – CRR Issues


Available network capacity for 2010 and 2011

100 MW (capacity)

100 MW (capacity)

Year 2010

Year 2011

annual

allocation

before the

annual auc.

annual

auction

before the

monthly auc.

Jan monthly

auction

after the

monthly auc.

TPTF – CRR Issues


Nominations for 2010 and 2011 submitted by NOIEs

100 MW (capacity)

100 MW (capacity)

60 MW (nominated)

60 MW (nominated)

Year 2010

Year 2011

annual

allocation

before the

annual auc.

annual

auction

before the

monthly auc.

Jan monthly

auction

after the

monthly auc.

TPTF – CRR Issues


All nominations for 2010 and 2011 allocated – but only some released

100 MW (capacity)

100 MW (capacity)

60 MW (allocated)

60 MW (allocated)

60*55% = 33 MW (released)

60*15% = 9 MW (released)

Year 2010

Year 2011

annual

allocation

before the

annual auc.

annual

auction

before the

monthly auc.

Jan monthly

auction

after the

monthly auc.

TPTF – CRR Issues


Remainder network capacity (up to 55% and 15%) auctioned

100 MW (capacity)

100 MW (capacity)

60 MW (allocated)

60 MW (allocated)

100*55% - 33 MW = 22 MW (auctioned)

55%

60*55% = 33 MW (released)

100*15% - 9 MW = 6 MW (auctioned)

15%

60*15% = 9 MW (released)

Year 2010

Year 2011

annual

allocation

before the

annual auc.

annual

auction

before the

monthly auc.

Jan monthly

auction

after the

monthly auc.

TPTF – CRR Issues


Balance of PCRRs (up to 90% or additional 35%) released to NOIEs

100 MW (capacity)

100 MW (capacity)

100*55% - 33 MW = 22 MW (auctioned)

60 MW (allocated)

60*90% - 33 = 21 MW (released)

60*55% = 33 MW (released)

100*15% - 9 MW = 6 MW (auctioned)

60*15% = 9 MW (released)

Year 2010

Year 2011

annual

allocation

before the

annual auc.

annual

auction

before the

monthly auc.

Jan monthly

auction

after the

monthly auc.

TPTF – CRR Issues


Remainder network capacity (up to 90%) auctioned

100*90% - 33 - 21 - 22= 14 MW(auctioned)

100 MW (capacity)

100 MW (capacity)

100*55% - 33 MW = 22 MW (auctioned)

60 MW (allocated)

90%

60*90% - 33 = 21 MW (released)

60*55% = 33 MW (released)

100*15% - 9 MW = 6 MW (auctioned)

60*15% = 9 MW (released)

JAN

Year 2010

Year 2011

annual

allocation

before the

annual auc.

annual

auction

before the

monthly auc.

Jan monthly

auction

after the

monthly auc.

TPTF – CRR Issues


Balance of PCRRs (additional 10%) for Jan 2010 released to NOIEs

100*90% - 33 - 21 - 22= 14 MW(auctioned)

100 MW (capacity)

100 MW (capacity)

60*100% - 33 - 21= 6 MW(released)

100*55% - 33 MW = 22 MW (auctioned)

60 MW (allocated)

90%

60*90% - 33 = 21 MW (released)

60*55% = 33 MW (released)

100*15% - 9 MW = 6 MW (auctioned)

60*15% = 9 MW (released)

JAN

Year 2010

Year 2011

annual

allocation

before the

annual auc.

annual

auction

before the

monthly auc.

Jan monthly

auction

after the

monthly auc.

TPTF – CRR Issues


Summary of CRRs Distributed

Current PCRR release mechanism does not provide 10% cushion

Proposed implementation simplifies the process

TPTF – CRR Issues


Available network capacity for 2010 and 2011

100 MW (capacity)

100 MW (capacity)

Year 2010

Year 2011

annual

allocation

annual

auction

Jan monthly

auction

TPTF – CRR Issues


All nominations for 2010 and 2011 allocated

100 MW (capacity)

100 MW (capacity)

60 MW (nominated & allocated)

60 MW (nominated & allocated)

Year 2010

Year 2011

annual

allocation

annual

auction

Jan monthly

auction

TPTF – CRR Issues


Network capacity (up to 55% and 15%) auctioned

100 MW (capacity)

100 MW (capacity)

60 MW (allocated)

60 MW (allocated)

100*55% - 33 MW = 22 MW (auctioned)

55%

60*55% = 33 MW (base loaded in Auction)

100*15% - 9 MW = 6 MW (auctioned)

15%

60*15% = 9 MW (base loaded in Auction)

Year 2010

Year 2011

annual

allocation

annual

auction

Jan monthly

auction

TPTF – CRR Issues


Network capacity (up to 90%) auctioned

100*90% - 60 - 22 = 8 MW(available for auction)

100 MW (capacity)

100 MW (capacity)

22*100% = 22 MW (based loaded in auction)

60 MW (allocated)

90%

60*100% = 60 MW (base loaded in auction)

100*15% - 9 MW = 6 MW (auctioned)

60*15% = 9 MW (base loaded in Auction)

JAN

Year 2010

Year 2011

annual

allocation

annual

auction

Jan monthly

auction

TPTF – CRR Issues


Summary of CRRs Distributed

TPTF – CRR Issues


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