Lessons Learned in Model Validation for NERC Compliance usa.siemens.com/digitalgrid
NERC Modeling, Data, and Analysis MOD 025 2: Generator Real and Reactive Power Capability Demonstration MOD 026 1: Verification of Models for Generator Excitation Control Systems MOD 027 1: Verification of Models for Turbine/Governor and Load Control Functions, including validation of turbine droop and determination of governor s deadband Page 2
Unit Size for NERC Model Validation Requirement (MVA) ERCOT Eastern Interconnection WECC Individual Unit Plant Individual Unit Plant Individual Unit Plant MOD-25-2 >20 >75 >20 >75 >20 >75 MOD-26-1 >50 >75 >100 >100 >75 >75 MOD-27-1 >50 >75 >100 >100 >75 >75 Page 3
Siemens PTI Services Onsite technical assistance for performing the tests Field tests data processing Model validation (PSS E/PSLF) Verification of generator OC excitation curve and generating unit inertia constant Adjustment of controllers parameters AVR and PSS tuning Over- and Under-excitation limiter adjustment V/Hz limiter adjustment Development of user-written models Page 4
MOD-025-2 Generator Tests Estimated and Operating capability curve (D-curve) Page 5
MOD-025-2 Generator Tests Measurements: Active & reactive power, voltage at unit terminals (point A) Active & reactive power, voltage at the high voltage side of the GSU (point F) Active & reactive power through the high voltage side of the auxiliary transformer (point B) Voltage at the low voltage side of the tertiary winding (point C) Active and reactive power at the high voltage side of the GSU of the other units (point D) Page 6
MOD-026-1 Generator Excitation Control System Model Verification Open-circuit dynamic response calibration Interconnected dynamic performance calibration Validate model parameters by comparing field test records against current PSS E or PSLF dynamic models Page 7
MOD-026-1 Generator Excitation Control System Model Verification Open-circuit dynamic response calibration Interconnected dynamic performance calibration Validate model parameters by comparing field test records against current PSS E or PSLF dynamic models Page 8
MOD-027-1 Turbine/Governor and Load Control Functions Model Verification Validation of the speed governor response for an on-line perturbation test with synthetic speed signal of ±0.2Hz Page 9
Power Plant Model Validation using PSS E Playback Model usa.siemens.com/digitalgrid
PSS E Playback Model PLBVFU1 Overview The PLBVFU1 model plays back a known set of voltage and frequency signals The PLBVFU1 model acts as a generator model (with no excitation system or turbine-governor models) The played-in voltage and frequency signals must be included in a data input file Page 11
PSS E Playback Model Playback Model for Voltage Signal Page 12
PSS E Playback Model Playback Model for Frequency Signal Page 13
PSS E Playback Model Playback Model Example Test System Unit to be tested Playback generator Page 14
PSS E Playback Model Playback Model PMU data vs. PSS E simulation results Page 15
Contact Us Carlos Grande-Moran Principal Consultant Siemens Power Technologies International E-mail: carlos.grande@siemens.com Dinemayer Silva Staff Consultant Siemens Power Technologies International E-mail: dinemayer.silva@siemens.com usa.siemens.com/digitalgrid Page 16