PGRR144  Dynamic Model Submission and Review Requirements for Large Loads including Large Computational Loads

This Planning Guide Revision Request (PGRR) clarifies requirements for submitting dynamic model data for Large Loads to ensure accurate representation of each Large Load in ERCOT’s models. The PGRR requires submission of this data using formats compatible with the software platforms described in the Dynamics Working Group Procedure Manual (i.e., PSS/E, PSCAD, and TSAT). This PGRR also requires model quality tests demonstrating voltage ride-through capability for all Large Loads and converter model validation reports benchmarking PSCAD models against actual hardware tests for all Large Computational Loads (LCLs), ensuring high-quality and accurate models. In addition, this PGRR clarifies that material changes to an LCL that could impact ride-through capability must be reviewed through the Large Load Interconnection Study (LLIS) process before implementing the change. Furthermore, the PGRR clarifies that an Interconnecting Large Load Entity (ILLE) must meet the dynamic data submission requirements before initiating a dynamic stability study. The same dynamic data submission requirements are applicable whenever dynamic data is required to be submitted in accordance with the prerequisites specified in the current paragraph (5) of Section 5.3.5, Quarterly Stability Assessment. Finally, the PGRR requires the ILLE to submit updated dynamic models for the “as-built” LCL facility prior to requesting Initial Energization along with documentation identifying any differences from previously submitted model data used in the ERCOT quarterly stability assessment (“QSA”) and an attestation that the as-built data reflect the actual field settings.