DWG Updates and Model Quality Test Summary
DWG Report to ROS
Javier Martinez – DWG Chair
March 2, 2023
DWG Update
•
DWG WebEx meeting held on 2/23/2023
•
2023 DWG Vice Chair
•
Position is pending to be filled
•
DWG Chair and ERCOT working on exploring a TSP rotational schedule for
DWG leadership moving forward.
•
DWG Flat Start Case Update
•
NOGRR 245 (IBR ride through)
•
Model Quality Test using non-PSEE software platforms
DWG Flat Start Case Update
•
On Feb. 9
th
Pass 5 posted with renewable generation updates and TSP
feedback.
•
Flat start simulation time increased to 30s due to model issues
observed for > 10s simulations.
•
Final flat start package will be posted by end of February.
•
TSP to provide contingencies, UFLS/UVLS/dynamic load models by
3/24/23.
•
Stability book will be posted 3/31/23.
Model Quality Test using non-PSEE software
platforms
•
At the December 2022 DWG meeting, Jamie Weber from PowerWorld made a request to DWG,
for other software tools (such as PowerWorld and GE PSLF) to be allowed for performing Model
Quality Tests.
•
DWG and ERCOT recommendation was based on the following discussion points:
1.
ERCOT observed performance difference in standard generic model between PSS/E and other software
(e.g. PowerWorld). Any discrepancy or difference could result in significant delay of interconnection process
which can impact customer project schedule.
2.
It would take significant resource and time for ERCOT to support, test, and validate studies preformed using
other software. ERCOT has team dedicated to the current planning software, investing significant time and
resources to develop tools and automation. Its is impractical to make those efforts for multiple tools.
3.
Based on the NERC Odessa Event Assessment Report, NERC recommends the use of detailed user-defined
model since standard generic models have significant limitations in their ability to represent highly complex
inverter controls and protection.
Allowing other software will be detrimental to model quality, and unintended consequence may occur to ERCOT system, reliability.
4.
Volume of review request are increasing every year (e.g. PGRR or NOGRR). Allowing any additional
software is very likely to result in inconsistency, unnecessary confusion and questions throughout the
process.
•
As a result, consensus of the DWG is to continue using PSS/E for MQT Tests and follow the existing
requirements.
Updates from the DWG meetings including chair leadership discussions, flat start case updates, and a decision to continue using PSS/E for Model Quality Tests despite requests for other software tools. Stay informed on the latest developments and decisions shaping the ERCOT system reliability.
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Presentation Transcript
DWG Report to ROS Javier Martinez DWG Chair March 2, 2023
DWG Update DWG WebEx meeting held on 2/23/2023 2023 DWG Vice Chair Position is pending to be filled DWG Chair and ERCOT working on exploring a TSP rotational schedule for DWG leadership moving forward. DWG Flat Start Case Update NOGRR 245 (IBR ride through) Model Quality Test using non-PSEE software platforms
DWG Flat Start Case Update On Feb. 9th Pass 5 posted with renewable generation updates and TSP feedback. Flat start simulation time increased to 30s due to model issues observed for > 10s simulations. Final flat start package will be posted by end of February. TSP to provide contingencies, UFLS/UVLS/dynamic load models by 3/24/23. Stability book will be posted 3/31/23.
Model Quality Test using non-PSEE software platforms At the December 2022 DWG meeting, Jamie Weber from PowerWorld made a request to DWG, for other software tools (such as PowerWorld and GE PSLF) to be allowed for performing Model Quality Tests. DWG and ERCOT recommendation was based on the following discussion points: 1. ERCOT observed performance difference in standard generic model between PSS/E and other software (e.g. PowerWorld). Any discrepancy or difference could result in significant delay of interconnection process which can impact customer project schedule. 2. It would take significant resource and time for ERCOT to support, test, and validate studies preformed using other software. ERCOT has team dedicated to the current planning software, investing significant time and resources to develop tools and automation. Its is impractical to make those efforts for multiple tools. 3. Based on the NERC Odessa Event Assessment Report, NERC recommends the use of detailed user-defined model since standard generic models have significant limitations in their ability to represent highly complex inverter controls and protection. Allowing other software will be detrimental to model quality, and unintended consequence may occur to ERCOT system, reliability. 4. Volume of review request are increasing every year (e.g. PGRR or NOGRR). Allowing any additional software is very likely to result in inconsistency, unnecessary confusion and questions throughout the process. As a result, consensus of the DWG is to continue using PSS/E for MQT Tests and follow the existing requirements.
