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Lessons Learned in Model Validation for NERC Compliance
usa.siemens.com/digitalgrid Unrestricted © Siemens Industry, Inc. 2018
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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
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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
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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
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MOD-025-2 Generator Tests
Estimated and Operating capability curve (D-curve)
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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)
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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
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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
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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
Power Plant Model Validation using PSS®E Playback Model
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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
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PSS®E Playback Model Playback Model for Voltage Signal
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PSS®E Playback Model Playback Model for Frequency Signal
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PSS®E Playback Model Playback Model Example Test System
Playback generator
Unit to be tested
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PSS®E Playback Model Playback Model – PMU data vs. PSS®E simulation results
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Contact Us
Carlos Grande-Moran Principal Consultant Siemens Power Technologies International E-mail: [email protected]
Dinemayer Silva Staff Consultant Siemens Power Technologies International E-mail: [email protected]
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