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Power Plant Model Validation using Measurement Data
Siemens Power Technologies International
usa.siemens.com/pti-consulting
Unrestricted © Siemens Industry, Inc 2016
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Outline
• Regulatory requirements
• General procedures
• Examples using testing data • Model validation using PSS®E playback feature
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Regulatory Requirements
• NERC MOD-025-2 Verification and Data Reporting of Generator Real and Reactive Power Capability and Synchronous Condenser Reactive Power Capability
• NERC MOD-026-1 Verification of Models and Data for Generator Excitation System or Plant Volt/Var Control Functions
• NERC MOD-027-1 Verification of Models and Data for Turbine/Governor and Load Control or Active Power/Frequency Control Functions
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General Procedure for Generator Model Validation via Testing
• Gather relevant machine data, plant/field information make a detailed test plan Standard tests Customized tests
• Make a detailed test plan • Conduct pre-test simulations as needed Perform field tests Process test data
• Derive model parameters from test data Select model structure Perform model parameter optimization Represent model compatible with the required simulation software
• Write a testing and model validation report
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Common Tests
• Reactive capability test
• Open circuit saturation test
• D-axis test
• Partial load rejection test
• AVR step response test
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Additional Tests
• V-curve test • Reactive load rejection test • Under-excitation limiter (UEL) test • Over-excitation limiter (OEL) test • V/Hz limiter test • PSS frequency response and step response test • PSS performance test • Governor droop test • Governor step response test • Short-circuit test
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Generator Active and Reactive Capability Example
• Active power capability limitations Conventional generators: prime mover capability Renewable resources: induction generator and
converter capabilities Auxiliary load
• Reactive power capability limitations
Generator Capability: OEM Provided vs Tested
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Excitation System Model Validation Example
AVR • Respond speed to reach ceiling • Field forcing capability
Terminal Voltage Response: Tested vs Simulated Original AVR Model Parameters Updated AVR Model Parameters
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Turbine/Governor Model Validation Example
Frequency step response test
Active Power: Tested vs Simulated Original Governor Model Parameters Updated Governor Model Parameters
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PSS®E Playback Feature PLBVFU1 Model Overview
• Plays back a known set of voltage and frequency signals
• Acts as a generator model. Do not attach an AVR or governor model
• Text file format for played-back voltage and frequency signals as follows (each sample described in a separate record and the values in each record separated by spaces or commas):
Time, voltage, frequency
• Available in PSS®E 33.8 and newer versions
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PSS®E Playback Feature PLBVFU1 Model Overview
• Played-back signal file requirements: With extension “.plb”. File name (without extension) <= 12 Located in the working folder (if not found, the playback feature will be
ignored) • Played-back voltage signal = internal (Thevenin) voltage of the playback
generator (ZSORCE for PLVFBU1 model should be non-zero)
• The sampled voltage and frequency values may be smoothed via a first order block with time constants Tv (for voltage signal) and Tf (for frequency signal).
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PSS®E Playback Feature PLBVFU1 Model Overview
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v34: Max file name length of 12 characters v33: Max file name length of 2 characters
PSS®E Playback Feature PLBVFU1 Model Overview
• Example “dyr” record IBUS 'USRMDL' ID 'PLBVFU1' 1 1 3 4 3 6 1 1 'UNIT1_pmu' 500.0 60.0 0.00 0.00 /
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PSS®E Playback Feature Playback Model (Voltage Signal)
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PSS®E Playback Feature Playback Model (Frequency Signal)
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PSS®E Playback Feature (PMU Data vs PSS®E Simulation Results) Example
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Contact us
George Zhou, PhD, PE Senior Staff Consultant
Phone: +1 650 772 2283
E-mail: [email protected]
Jay Senthil, PhD Senior Staff Engineer
Phone: +1 518 395 5013
E-mail: [email protected]
usa.siemens.com/pti-consulting