ECE 692
Advanced Topics on Power
System Stability
3 – Small Signal Analysis:
Measurement-based methods
Spring 2016
Guest lecturer: Bin Wang
Instructor: Kai Sun
1
Demo on TSAT Built-in Prony Tool
•Create and run a scenario in TSAT, then click “View results”
2
Demo on TSAT Built-in Prony Tool
•Select the quantity and click “Plot”, then select curves to be
analyzed by Prony (up to 4 curves in one analysis)
3
Demo on TSAT Built-in Prony Tool
•Click “Tool->Prony Analysis”
4
Demo on TSAT Built-in Prony Tool
•Specify the time window and click “Recalculate”
5
Demo on TSAT Built-in Prony Tool
•Mark “Ignore Modes With Freqs less than …” to eliminate the
effects from zero-frequency and small frequency modes.
6
Demo on TSAT Built-in Prony Tool
•Mark “Use only selected modes in the list …”, select modes of
interest in the result window, then a reconstruct signal using
the selected modes will be shown as the red curve in the plot.
7
Demo on TSAT Built-in Prony Tool
•Magnitude, phase, frequency, damping, real and imaginary
parts of the eigenvalue about each resulting mode are
displayed here.
8
Demo on TSAT Built-in Prony Tool
•If mode shape phase needs to be calculated, the user should
guarantee the same starting points of time windows for
different signals under analysis, while the ending points could
be different.
•Possible nonlinearities inherent in the first several swings
should be avoided. The following time window where the
signal is more linear should be selected for analysis.
9