ERCOT Resource Integration Topics Overview
Key topics related to ERCOT resource integration, including Quarterly Stability Assessment planning, modeling interconnection facilities, GINR timelines, RIOO technology types for battery energy storage, and more.
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Resource Integration Topics Jay Teixeira ERCOT Resource Integration Working Group September 23, 2021
Quarterly Stability Assessment (QSA) Planning Guide 5.9 Next Deadline for QSA All-Inclusive Generation Resource Initial Synchronization Date Upcoming January, February, March Last Day for an IE to meet prerequisites as listed in paragraph (4) below Prior August 1 Completion of Quarterly Stability Assessment End of October Prior November 1 End of January Upcoming April, May, June Prior February 1 End of April Upcoming July, August, September Prior May 1 End of July Upcoming October, November, December If a GINR is not included in QSA, its Initial Synchronization date will be automatically delayed to the next quarter 2
Quarterly Stability Assessment (QSA) Planning Guide 5.9, Quarterly Stability Assessment Issue s seen in previous QSA s 10 day comment period for FIS Needs to be complete before QSA deadline TSPs need to plan for it Dynamic Model Review Dependent on FIS Stability study Need to meet PG 6.9 15 to 30 days prior to QSA deadline PSSE Model Quality Test Required PSCAD Model Quality Test and Unit Model Validation required for November 1, 2021 QSA TSAT Model Required If PSSE model is UDM, then TSAT model should be UDM by November 1, 2021. 3
Modeling Interconnection Facilities Model Load Calendar: Applies to both TSPs and REs REs need to keep in mind that TSPs may need RE facilities to be submitted prior to submitting their interconnection facilities Some TSPs are sensitive to submitting Interim Updates Work with your TSP Could cause one month slip in MRD/PLD 4
Redacted FIS Stability Report Dynamic models should be removed from the redacted version of FIS stability reports. They are contained in model parameters in report bodies .dyr and .snp files attached in report appendix ERCOT found that dynamic models were included in zipped files embedded in the appendix of redacted FIS stability reports. Suggestions: Avoid zipping and embedding files in report appendix Convert the redacted FIS stability reports to PDF format 7
Curtailments Tests for IRRs Clarification of requirement for interconnections that have already received Part 2 Procedure started in November 2020 for IRRs due to number of commissioned resources that were not able to follow basepoint with the proper telemetry Any IRR interconnection requesting Part 3 approval after November 1, 2020 will be required to pass the curtailment test before receiving approval Interconnections normally required to pass curtailment test before receiving Part 2 > 20 MVA 8
Resource Data Updates for Transformer Vector Group Identifiers There are 3 new Vector Group Identifiers: Dynyn NEW Vector Group Identifier Yndd Replaces Yndd1 YNynd Replaces YNyn0d1 There will no longer be phase shifts represented in the Resource Data (RARF and RIOO-RS) These will cause errors and exceptions in RIOO-RS 9
Resource Data Updates for Transformer Vector Group Identifiers Vector Group Identifier Choices: 10
New AVR Template Posted Combined AVR Template: Template Location: http://www.ercot.com/services/rq/integration Station Code (EXACT): Step 1: Step 2: Step 3: Clear Graph All Clear All Import PI Data Clear Import File ERCOT AVR / PSS Performance Test Guide and Template IRR/IBR AVR Test Process: Coordinate AVR test QSE coordinates with ERCOT and TSP/TO! Start with a few minutes of data with the AVR set point at its neutral or nominal setting. Increase the AVR set-point by 2-4% (not to exceed 1.05 per unit voltage, or a lower value if specified by the Transmission Operator or system conditions) and allow sufficient time for the AVR system response to settle (Minimum 5 minutes). Change the AVR set point back to the nominal set point and allow sufficient time for the AVR system response to settle (Minimum 5 minutes). Decrease the voltage set-point by 2-4% step-change (limited to 0.95pu), depending on the initial set-point voltage and ERCOT s and TSP s feedback on the size of step-change allowable at the time of the test based on system conditions. Allow sufficient time for the AVR system response to settle (Minimum 5 minutes) Change the voltage set-point back to the original set-point Allow sufficient time for the AVR system response to settle (Minimum 5 minutes) Record all the data and submit the AVR test results to ERCOT via NDCRC Record in 1- 4 sec intervals! Conventional AVR/PSS Test Process: Coordinate AVR/PSS test QSE coordinates with ERCOT and TSP/TO! The tests should be performed when the generators under test are on-line and at high or full output If the generator is equipped with a PSS, the PSS should be turned off to verify the functioning and performance of the AVR. Another test should be conducted with the PSS on to verify the functioning and performance of the PSS A voltage set-point step of 2-4% is recommended for the tests (limited to the range of .95pu-1.05pu at the POI) Test data should be collected for at least 1-5 seconds prior to the step change and for at least 10 20 seconds after The test should begin with the AVR voltage set-point at its neutral or nominal setting. The AVR voltage set-point should be changed by introducing the step and allowed to settle, then the AVR voltage set-point should be returned to the setting prior to the step change and allowed to settle Record all the data and submit the AVR and/or PSS test results to ERCOT via NDCRC Record in 1- 4 sec intervals! Voltage Levels Reactive Power Output Real Power Output Capacitors Reactors SVC/STATCOM/S.C. Conventional Generation Gross Unit Reactive Power Output (MVAR) Gross Unit Reactive Power Output (MVAR) Gross Unit Reactive Power Output (MVAR) Gross Unit Reactive Power Output (MVAR) Gross Unit Reactive Power Output (MVAR) Gross Unit Real Power Output (MW) Gross Unit Real Power Output (MW) Gross Unit Real Power Output (MW) Gross Unit Real Power Output (MW) Gross Unit Real Power Output (MW) Actual Volatge at Monitor Terminals (kV) POI MV Bus Voltage (kV) Reactive Power - Capacitor (MVAR) Reactive Power - Capacitor (MVAR) Reactive power - Capacitor (MVAR) Reactive power - Capacitor (MVAR) Reactive power - Capacitor (MVAR) Reactive Power - Reactor (MVAR) Reactive Power - Reactor (MVAR) Reactive Power Dynamic (MVAR) Reactive Power Dynamic (MVAR) Generator Terminal Frequency (Hz) PSS Status [ON] PSS Status [OFF] Time Stamp (Central Standard Time) Point (kV) AVR Set Voltage (kV) 11
Active RRs PGRR091, FIS Application Completion 60-Day Limit. Approved by PUCT 08/19/2021. Language active. NOGRR223, Add Phasor Measurement Recording Equipment Requirement to Modified Generating Facilities in Interconnection Process. ROS IA approved 9/2/2021. Next at TAC. NOGRR227, Add Phasor Measurement Recording Equipment Location for Main Power Transformer for Intermittent Renewable Resource (IRR). TAC approved 8/27/2021. Next at PUCT. 12
DGR Workshop XII October 14, 2021 after PRS meeting Topics for Discussion (Tentative) Unboxing PGRR082 language Timeline for lifting moratorium What will RE s need to have ready for January 4, 2022 13
Other contact information ResourceIntegrationDepartment@ercot.com is distribution list for Resource Integration department Mailing List RESOURCE_INTEGRATION@LISTS.ERCOT.COM 14
Questions? Thank you!
