Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Graphical Analysis of PV Plant Data

1,140 views

Published on

CEI's Project Development Manager dives into graphical analysis of solar PV plant data.

  • Be the first to comment

  • Be the first to like this

Graphical Analysis of PV Plant Data

  1. 1. Graphical Analysis of PV Plant DataSaurabh SamdaniProject Development Manager
  2. 2. Cupertino Electric (CEI) Overview ● Services:  Engineering & construction ● Founded:  1954 ● Employees:    ≈ 1,400 (field + office) ● Revenue:  $574 million (2011) ● Safety: AGC “Safety Awards of Excellence” (2011) ● Customers:  Fortune 100 companies ● Reach:  National ● MW of Solar:  150 MW 
  3. 3. Agenda● Challenges/opportunities surrounding  PV plant data● Why worry about how to display data? ● Charts for common questions● Case study: irradiance sensors● Q&A
  4. 4. Now that you have the data,  what do you do with it? 
  5. 5. “People don’t want to buy a quarter‐inch drill.  People want a quarter‐inch hole.” ― Harvard Marke ng Professor, Theodore Levi   PLANT STATUS DATA
  6. 6. I II III IVX Y X Y X Y X Y10 8.04 10 9.14 10 7.46 8 6.588 6.95 8 8.14 8 6.77 8 5.7613 7.58 13 8.74 13 12.74 8 7.719 8.81 9 8.77 9 7.11 8 8.8411 8.33 11 9.26 11 7.81 8 8.4714 9.96 14 8.1 14 8.84 8 7.046 7.24 6 6.13 6 6.08 8 5.254 4.26 4 3.1 4 5.39 19 12.512 10.84 12 9.13 12 8.15 8 5.567 4.82 7 7.26 7 6.42 8 7.915 5.68 5 4.74 5 5.73 8 6.899 11 9 11 9 11 9 11 Linear Regression . .
  7. 7. I II105 0 III IV105 0 5 10 15 5 10 15
  8. 8. The Big Question:  How is my plant doing?Power Irradiance Capacity Index18 MW 850 W/m2 93 % Active Alarm Needs Attention Needs Acknowledge
  9. 9. Example Utility Plant Dashboard
  10. 10. DG System Dashboard
  11. 11. Kiosk View
  12. 12. Kiosk View
  13. 13. The Big Question:  How is my plant doing?Power Irradiance Capacity Index18 MW 850 W/m2 93 % Active Alarm Needs Attention Needs Acknowledge
  14. 14. MetricsActual Simulated Historical
  15. 15. Cumulative Energy Production
  16. 16. Monthly Energy ProductionMWhVariance %
  17. 17. Back‐Up DataMonth of Date Actual MWh Simulated MWh DifferenceSep‐11 2,700 2,500 8.0%Oct‐11 2,450 2,300 6.5%Nov‐11 1,700 1,750 ‐2.9%Dec‐11 1,833 2,028 ‐9.6%Jan‐12 1,879 1,977 ‐5.0%Feb‐12 2,250 2,263 ‐0.6%Mar‐12 3,125 2,839 10.1%Apr‐12 3,325 3,100 7.3%May‐12 3,750 3,549 5.7%Jun‐12 3,555 3,405 4.4%Jul‐12 3,250 3,380 ‐3.8%Aug‐12 2,800 3,083 ‐9.2%Sep‐12 2,300 2,500 ‐8.0%Total 34,917 34,674 1%
  18. 18. Longer Term: Progress Reportactual historical simulated
  19. 19. Problem?Capacity index Capacity index South System92 78
  20. 20. Inverter AC kW Output
  21. 21. Inverter Issue?
  22. 22. Culprit: Coolant Leakage Cabinet Temperature
  23. 23. Case Study: Irradiance Sensors
  24. 24. Add Second Sensor
  25. 25. Third Sensor
  26. 26. Zoomed‐in View
  27. 27. Scatterplot matrix
  28. 28. Marker Colors bytime of day 8 AM 5 PM
  29. 29. Final Thoughts● Focus on ¼” hole, rather than the drill● Data needs context● Graphical formats are quick to understand● Filter out the necessary from the extraneous● Choose the appropriate chart
  30. 30. Q&A● For comments or to follow the discussion, visit: http://blog.cei.com 

×