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Distributed Generation Penetration Patterns

Learn about how ERCOT is mapping Distributed Energy Resources (DERs) for grid reliability. Explore DG interconnection trends and clumpiness issues.

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Distributed Generation Penetration Patterns

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  1. Distributed Generation Penetration Patterns Connor Anderson, ERCOT Engineering Development Program Paul Wattles, ERCOT Market Design & Development DREAM TF December 14, 2015

  2. DERs and Grid Reliability • ERCOT has proposed that TDSPs map all DERs to their appropriate Transmission Load point on the ERCOT Common Information Model (CIM Load) • See DER Concept Paper, pgs. 20-21, 8/20/15 DREAM TF • This mapping will be necessary to support several of the ISO’s reliability functions • Steady State analysis • Dynamics study cases • NERC Annual Load Data Request • Potentially (down the road), load forecasting • This mapping will require putting processes in place that don’t currently exist • Based on dialogue with TDSPs, in most cases the data exists, just not the process for organizing and transmitting

  3. DERs and Grid Reliability • ERCOT acknowledges the challenge of putting a mapping system in place and has committed to making the case for the reliability needs • Today’s presentation is the first step in making that case • This is not an urgent issue at this time • We have time to work this out and get it right

  4. The ‘Clumpiness’ Issue • Premise: DER adoption tends to occur unevenly – that is, clustered in specific areas and neighborhoods • Concentrations of DG could eventually impact the transmission system • The following slides provide an early view of DG interconnection and penetration trends in ERCOT FOLLOWING DATA CONSISTS OF: • Registered DG in both competitive and NOIE areas, as provided via ERCOT Registration data • Unregistered DG in competitive choice areas only, as derived from TDSP-supplied data for Load Profile code updates • Does not include unregistered DG in NOIE areas

  5. Registered and Unregistered Total DG: Number of Installations Registered: 71 Unregistered: 7118 Total: 7,189

  6. Registered and Unregistered Total DG Capacity Registered: 496.4 MW (Incl. registered NOIE : 92.7 MW) Unregistered: 56.9 MW Total: 553.3 MW

  7. Registered and Unregistered PV: Number of Installations (6702 total) Registered: 9 Unregistered: 6693 Total: 6,702

  8. Registered and Unregistered PV Capacity Registered: 57.12 MW (Incl. registered NOIE : 55.12 MW) Unregistered: 50.10 MW Total: 107.22 MW

  9. Central Texas Unregistered and Registered DG: No. of Installations Coryell Falls Lampasas Bell San Saba Burnet Williamson Llano Milam Burleson Travis Lee Blanco Bastrop Hays

  10. Central Texas Unregistered and Registered DG: Capacity in kW Coryell Falls Lampasas Bell San Saba Burnet Williamson Llano Milam Burleson Travis Lee Blanco Bastrop Hays

  11. Central Texas Unregistered and Registered PV: No. of Installations Coryell Falls Lampasas Bell San Saba Burnet Williamson Llano Milam Burleson Travis Lee Blanco Bastrop Hays

  12. Central Texas Unregistered and Registered PV: Capacity in kW Coryell Falls Lampasas Bell San Saba Burnet Williamson Llano Milam Burleson Travis Lee Blanco Bastrop Hays

  13. (Unregistered and Registered) Totals: 4280 substations* 7189 DG installations * This number represents all substations in ERCOT, including substations with no Loads and substations with only Load Resources or ‘non-conforming’ Loads.

  14. (Unregistered and Registered) Totals: 948 substations 7189 DG installations

  15. (Unregistered and Registered) Totals: 4280 substations 553.3 MW of DG

  16. (Unregistered and Registered) Totals: 920 substations 553.3 MW of DG

  17. (Unregistered and Registered) Totals: 948 substations 5656 CIM loads

  18. Totals: 4280 substations 7118 DG installations

  19. Totals: 915 substations 7118 DG installations

  20. Totals: 4280 substations 56.9 MW of DG

  21. Totals: 886 substations 56.9 MW of DG

  22. Totals: 915 substations 1906 CIM loads

  23. Totals: 4280 substations 71 DG installations

  24. Totals: 64 substations 71 DG installations

  25. Totals: 4280 substations 496.4 MW of DG

  26. Totals: 64 substations 496.4 MW of DG

  27. Totals: 64 substations 162 CIM loads

  28. Questions paul.wattles@ercot.com (512) 248-6578 connor.anderson@ercot.com (512) 248-6549

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