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PDCWG Report to ROS

PDCWG Report to ROS. David Kee Chair CPS Energy Sydney Niemeyer Vice Chair NRG Energy. January Meeting. Leadership nomination Review of early release of HASL to SCED NPRR576 review SCR773 performance metrics review Frequency Event Review. PDCWG Leadership – 2014. Chair – Don Blackburn

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PDCWG Report to ROS

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  1. PDCWGReport to ROS David Kee Chair CPS Energy Sydney Niemeyer Vice Chair NRG Energy

  2. January Meeting • Leadership nomination • Review of early release of HASL to SCED • NPRR576 review • SCR773 performance metrics review • Frequency Event Review

  3. PDCWG Leadership – 2014 • Chair – Don Blackburn • Vice Chair – Sydney Niemeyer

  4. Early Release of HASL to SCED • Q: When should HASL be released (manually deploy RRS) such that 2300MW of frequency responsive RRS always be held in reserve? • A:Would release too early if at 3300 PRC except for one time in the last year. • PDCWG agrees with this point • When Non Spin is deployed (PRC at 2500MW) this is a point where HASL can be released for portion of RRS(between “X”MW and 500 MW transferred from Non Spinning based on ramp limitations) • PDCWG has no objection to this proposal. Concern is how to do it appropriately. • Issue that some RRS may have already been deployed. • Issue with knowing what capacity is frequency responsive (20% frequency responsive vs 24% base plus 4% nonfrequency responsive) • When Out of Regulation Up and no SCED Up room • between “X”MW and 500 MW transferred from Non Spinning based on ramp limitations • Below 2300 Spinning. • between “X”MW and 500 MW transferred from Non Spinning based on ramp limitations • When below 3000 PRC and forward indications suggest going into EEA • between “X”MW and 500 MW transferred from Non Spinning based on ramp limitations

  5. PDCWG Considerations/Suggestions for further analysis • Change how ERCOT counts startup and shutdown in Spinning and PRC calculations and evaluate the results during the extreme events (1/6/14) • Evaluate Ramp Rates • Account for ramp rates in the Spinning and PRC calculations and evaluate extreme events • Research any correlation between HDL and Ramp Rates • Understand Emergency Ramp Rate behavior • Evaluate telemetry latency • Responsive Reserve deployment timing and functionality • Improve time from energy need to energy delivery • Consider the load resources carrying RRS • Ratio changes when 500MW is only released from generators • Consider Real Time Reserve Forecast based on load and gen forecast • Consider how the various cap limits effect constraints and the stranded energy behind the constraints

  6. NPRR 576 • PDCWG doesn’t support this NPRR as written. • Issues: • Operational benefits from Online NonSpinning Reserve • Possibly update the reserve accounting by ERCOT. • Take Online NonSpin out of PRC calculations.

  7. Questions?

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