1. Dynamic System Identification (DSI) Toolbox
Frank Tuffner
Electricity Infrastructure Group
WECC JSIS Meeting – Salt Lake City, Utah
September 9, 2014
PNNL-SA

2. Mode Meter MATLAB-based algorithm implementations
Mode Meter encompasses many techniques
Parametric and nonparametric approaches
Online and offline analysis tools
Mode Meter entails algorithm development and refinement
Collaborative work with Montana Tech, University of Wyoming, and Binghamton University
Portions incorporated into commercial software packages
January 2, 2019

3. Dynamic System Identification Toolbox
Open-source MATLAB-based collection of phasor measurement-oriented tools
Data import/export functions
Import – SWX, PPSM, DST (BPA PDC formatted)
Reads COMTRADE single-file, CFF format
SQL database interfacing, for querying PI historian or other databases
Export – DST+INI, MAT, CSV
Data processing
Filtering, resampling, correction
Data Analysis
Fourier-based techniques
Prony Ringdown GUI
Mode Meter tools – UWyo/MT Tech research
Custom function integration

4. Dynamic System Identification Toolbox

5. Prony Ringdown GUI MATLAB-based tool for analysis of ringdown events
Prony-based algorithm
Extracts modal information
Modal parameter estimates
Mode shape estimates
Interactive analysis
Interval of analysis
Model order
Overlay of estimated modal contents

6. Prony Ringdown GUI – Setup Screen

7. Prony Ringdown GUI – Results Screen

8. Questions/Further Information
For further information, please feel free to contact:
Frank Tuffner
DSI Toolbox Available at:
or under the “Phasor Tool Repository” as “Dynamic System Identification (DSI) Toolbox”