QSE Managers Working Group Report to WMS September 19, 2007.

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Presentation transcript:

QSE Managers Working Group Report to WMS September 19, 2007

Reliability vs Scarcity Pricing Charge:  Attempt to find a solution that will address the Reliability vs Scarcity Pricing debate Proposal included in LTSTF white paper to be presented by Bob Wittmeyer

Reliability vs Scarcity Pricing Highlights  3.5% of intervals have OOM for ARRS  80% of days over-forecast in Day-Ahead  ERCOT comparison of Day-Ahead resource plan capacity commitment vs actual – significant reduction. RPRS engine making firm commitments on units when the rest of the resource plan is non-binding.

Reliability vs Scarcity Pricing Highlights  Creating a financial incentive to take units offline in the middle of an Alert because prices drop.  Sometimes OOM instructions seem to last much longer than necessary – therefore depressing prices longer than necessary  Find some way to reach the top of the balancing stack when reserves get low.

Reliability vs Scarcity Pricing Highlights  Current system makes MW of balancing stack unusable due to discount factor.  ROS initiatives: dynamic discount factor Unannounced testing on HSL to account for weather differentials

Reliability vs Scarcity Pricing Highlights  Unload some units that are at the top, creating RRS. Redispatch of existing gen can give needed capacity instead of bringing on additional units.  PRR730 – no consensus, but need to continue discussion.

Reliability vs Scarcity Pricing Proposal  Increase amount of RRS procured by 500MW  Retain current 2300 & 2500 MW thresholds  Implement ex-ante Administrative Price Adjustments per flow chart presented by Dan Jones Concern  Is an engineering study needed for additional RRS and LAAR?

Zonal Congestion? EECP > Step 1 or Step 1 > 30 min? Y Y N N NSRS Deployed? Y N OOM for Short Supply? Y N MCPE = CAP MCPE = SPD MCPE MCPE = Max (SPD MCPE, $150 to $250) MCPE = SPD MCPE + $50 Option 1

Zonal Congestion? EECP > Step 1 or Step 1 > 30 min? Y Y N N OOM for Short Supply or NSRS Deployed? Y N MCPE = CAP MCPE = SPD MCPE MCPE = Max (SPD MCPE, $150 to $250) Option 2