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U.T. Pan Am PMU

Synchrophasor Homework Network for ERCOT. U.T. McDonald Observatory PMU. Oscilloscope View. If UT Austin = 0 º ref, then McD leads by 60 º , and Pan Am lags by 30 º. +60 º −30º. U.T. Pan Am PMU. 360 º.

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U.T. Pan Am PMU

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  1. Synchrophasor Homework Network for ERCOT U.T. McDonald Observatory PMU Oscilloscope View. If UT Austin = 0º ref, then McD leads by 60º, and Pan Am lags by 30º +60º −30º U.T. Pan Am PMU 360º Small oscillations in the relative phase angles give an indication grid stability. Essentially, these oscillations provide an “EKG” for large power grids.

  2. 1 Minute Window Angle Ringdown at McD 1 Minute Window Angle Ringdown at PanAm

  3. Unit Trip, April 24, 2011, 21:15 CDT

  4. Unit Trip, April 24, 2011, 21:15 CDT

  5. Unit Trip, April 24, 2011, 21:15 CDT PanAm McD

  6. McDonald Ring Magnitude, degrees Steady-State Change = 13.98 – 13.31 = 0.7 degrees Damped Resonant Frequency, Hz Normalized Damping Coefficient

  7. Pan Am Ring Magnitude, degrees Steady-State Change = 14.40 – 17.68 = -3.3 degrees Damped Resonant Frequency, Hz Normalized Damping Coefficient

  8. Damped Oscillation Frequencies, Magnitudes, and Normalized Damping Ratios for the Hour 21:00 – 22:00 CDT, April 24, 2011 McD Voltage Angle Relative to UT Austin UT Pan Am Voltage Angle Relative to UT Austin

  9. West Texas Voltage Phase Angle Advances 80+ Degrees in 6 Hours

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