Distributed Generation Framework and Observations Discussion
Explore the status and requirements of Distributed Generation (DG) within ERCOT, including registration thresholds, visibility issues, and analyses of different DG categories. Learn about the current framework, registration processes, and the push for improved visibility by ERCOT and NERC.
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Presentation Transcript
Discussion of RTF-5 Distributed Generation April 16, 2020
Status of NPRR RTF- 5 for DG Initial proposed language reviewed at Oct 10, 2019 RTF meeting http://www.ercot.com/content/wcm/key_documents_lists /172671/RTF-5_DG_Updates.pptx Distributed Generation (< 10 MW / < 60 kV) 4 Separate types of registration requirements 5 Different ERCOT categories 2 PUBLIC
Current Generation Framework Unregistered Generation Generation Resource (ERCOT Dispatchable) Settlement Only Generator** Distribution Connected Transmission Connected Transmission Connected Distribution Connected Distribution Connected Settlement Only Transmission Self- Generator* Transmission Generation Resource Distribution Generation Resource Settlement Only Transmission Generator Unregistered Distribution Self -Generator Settlement Only Distribution Generator Unregistered Distribution Generator <10MW >10MW <10MW >10MW <10MW >1 MW Unregistered generator >1 MW but doesn t export Unregistered generator <1 MW Must register w/ ERCOT when > 1 MW and exports or: may choose to register <1 MW Required for any Distribution connected generator > 10 MW Register PUC as self generator Register PUC as self generator **Settlement Only Generators can t participate in Ancillary Services Market, RUC, SCED, or make Energy Offers. *Transmission Self Generator may occasionally export, but does not generate with the intent to sell at wholesale http://www.ercot.com/content/wcm/key_documents_lists/130715/ Resource_Matrix_for_Generators.pptx PUBLIC
Observations about DG* Three categories of DG > 1 MW Distribution Generation Resource (DGR) Currently modeled in ERCOT Network Model Section 3.10.7.2(1) Settlement Only Distribution Generator (SODG) Currently mapped in ERCOT Network Model Section 3.10.7.2(3) Unregistered Distribution Self Generator No visibility SODG Registration issues Section 16.5(5) DG with an installed capacity greater than one MW, the DG registration threshold, which exports energy into a Distribution System, must register with ERCOT. There are differing interpretations of the phrase exports to distribution system *For the purposes of this discussion, the term DG will also include Distribution-connected Energy Storage 4 PUBLIC
DG Visibility to ERCOT ERCOT DER Reliability Paper http://www.ercot.com/content/wcm/lists/121384/DERs_Reliability_Impacts_FINAL.pdf ERCOT requires Improved Visibility into DER. Mapping DG > 1 MW NERC is pushing to account for DER in ERCOT models NERC Planning Committee is publishing new reliability guidelines regarding DER. https://www.nerc.com/comm/PC/System%20Planning%20Impacts%20fro m%20Distributed%20Energy%20Re/2019- 11_DER_A_Guideline_Webinar.pdf Propose requiring any DG > 1 MW to register with ERCOT 5 PUBLIC
Proposal Three categories of DG > 1 MW (owner of equipment may choose registration based on desired market participation) Distribution Generation Resource Settlement Only Distribution Generator Unregistered Distribution Self Generator* Maintain intent of distribution self-generator where there is no desire to be settled for unintentional export of energy: ERCOT will only require mapping information for reliability similar to SODG No telemetry requirements No registration as a Resource Entity (market participant) No metering or settlement changes No QSE required *note term does not exist in ERCOT protocols 6 PUBLIC
Language However, by registering , these self-generating DGs, they aren t really in the category of unregisteredDG The structure for these self-generating DGs would not involve any settlements from ERCOT. Therefore, the proposal would be to categorize these as Non-Settled Distribution Generators . 7 PUBLIC
Proposed Revision to RTF Generation Framework *** 8 PUBLIC
Proposal ALL DG* > 1 MW would be visible to ERCOT Distribution Generation Resource (DGR) Provide Resource Registration data (RARF) to model in ERCOT Network Model Registration as DGR Registration as a Resource Entity for settlements (settled per protocols) Settlement Only Distribution Generator (SODG) Provide Resource Registration data (RARF) to map in ERCOT Network Model Registration as SODG if they export to the distribution system. Registered as a RE for settlements (settled per NPRR917) Non Settled Distribution Generator (NSDG) Provide Resource Registration data (RARF) to map in the ERCOT network model Not registered as a RE since no exports so no settlements required. 9 PUBLIC
