ERCOT's Planning Guide says to "ensure that power oscillation within the range of 0.2 Hz to 2 Hz decays with a minimum 3% damping ratio." (S 4.1.1.6) Does anyone know how to check for the freq. range above and the damping ratio for a large number of .out files containing many channels? I'm using PSS/E.
You can use PSSPLT to perform modal analysis. Please read PSSPLT Program Manual, Ch. 4.13.3 for a detailed explanation.
For multiple .out files, you can create .idv file inside PSSPLT and run it in Python.
Sure have and sure do.
Check the post "Channels - tool to process outs files"
The channels tool was developed in python 2.7 and tested with PSSe v 33 and v.34. Instructions in the readme file will show how to run it with the demo data set included.
Channels has a function to evaluate the damping ratio of power system signals (for a demo, use the file "chan_Pe_dmp.ini" as input to channels"). For a list of OUT files and a list of channels, it uses Matrix Pencil algorithms to calculate the damping ratio of each signal, producing a CSV file with output data and plots of original and re-composed signals.
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