Dynamic System Identification (DSI) Toolbox Frank Tuffner Electricity Infrastructure Group WECC JSIS Meeting – Salt Lake City, Utah September 9, 2014 PNNL-SA-105201

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 April 6, 2019

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

Dynamic System Identification Toolbox

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

Prony Ringdown GUI – Setup Screen

Prony Ringdown GUI – Results Screen

Questions/Further Information For further information, please feel free to contact: Frank Tuffner francis.tuffner@pnnl.gov 206-528-3124 DSI Toolbox Available at: https://www.naspi.org/site/Module/Tool/Detail/Detail.aspx?m__ID=TOOL&toolid=54&versionstatus=CURRENT&versionid=42 or under the “Phasor Tool Repository” as “Dynamic System Identification (DSI) Toolbox”