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400 miles

Texas Synchrophasor Network Data Validation and Mining. Majority of load is in the green rectangles, i.e. “Central ERCOT”. Wind Country. 120V wall outlet at U.T. Austin, and 69kV 3 Φ monitor at nearby Austin Energy Harris Sub. Austin. 400 miles. 300 miles. Funding provided by EPRI

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400 miles

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  1. Texas Synchrophasor Network Data Validation and Mining Majority of load is in the green rectangles, i.e. “Central ERCOT” Wind Country 120V wall outlet at U.T. Austin, and 69kV 3Φmonitor at nearby Austin Energy Harris Sub Austin 400 miles 300 miles • Funding provided by EPRI • Equipment provided by Schweitzer Engineering Labs Grady, Brooks, NREL, 1/27/11

  2. The Daily Screener

  3. The Daily Screener, cont.

  4. The Daily Screener, cont Hourly Summary File: PMU_Daily_Screener_11041811_Hourly_Report.csv

  5. The Daily Screener, cont Hourly Summary File: 11041811_Sixty_Minute_Angle_and_Freq_Report.csv

  6. The Daily Screener, cont One-Minute Averages

  7. Texas Synchrophasor Network News, April 18, 2011. Page 1 of 3. Texas Nodal Market Has Created a New West Texas Oscillation Mode with Time Period ≈ 30 minutes? 1. Unusual large, slow angle rings I had not noticed before. Period ≈ 30 mins, 10º to 15º peak-to-peak. Zoom-In, 24 hours wide 1 1 1 Prof. Mack Grady, U.T. Austin

  8. Zoom-In, 8 Hours Wide Texas Synchrophasor Network News, April 18, 2011. Page 2 of 3. Texas Nodal Market Has Created a New West Texas OscillationMode with Time Period ≈ 30 minutes? Prof. Mack Grady, U.T. Austin

  9. Texas Synchrophasor Network News, April 18, 2011. Page 3 of 3. Texas Nodal Market Has Created a New West Texas Oscillation Mode with Time Period ≈ 30 minutes? Sunday Morning, April 17, 2011 Prof. Mack Grady, U.T. Austin

  10. Lesson 4. You Can Estimate Thevenin Equivalent Impedances Across the Grid with Synchrophasors Wind MW Backdown. July 15, 2010. Thevenin Impedance Calculation, cont. Use the Excel Solver with the 90 minutes of readings to minimize least-squared error and determine Xth

  11. ERCOT’s graph of West-to-North P flow Texas Synchrophasor Network’s graph of West-to-Central ERCOT Voltage Angle Page 4 of 5

  12. The Daily Screener, cont

  13. The Daily Screener, cont

  14. The Daily Screener, cont

  15. The Daily Screener, cont

  16. The Waveform Analyzer

  17. The Waveform Analyzer, cont

  18. Modal Analysis, cont.

  19. Modal Analysis, cont.

  20. Modal Analysis, cont.

  21. Modal Analysis, cont.

  22. Daily Screener for April 21, 2011, GMT

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