1 / 56

Utilization of 5sec Data in Data Quality Programs for Meteorological Towers

Utilization of 5sec Data in Data Quality Programs for Meteorological Towers. Harold Osborn, CHP AMEREN, Callaway Plant Tim Waldron, Met Associates NUMUG June 26th, 2008. Summary.

gabe
Download Presentation

Utilization of 5sec Data in Data Quality Programs for Meteorological Towers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Utilization of 5sec Data in Data Quality Programs for Meteorological Towers Harold Osborn, CHP AMEREN, Callaway Plant Tim Waldron, Met Associates NUMUG June 26th, 2008

  2. Summary * Higher frequency un-averaged (raw) met data from towers can provide an additional tool to assess data quality and instrument performance. * The benefits of utilizing 5sec data in the overall QA/QC effort at Ameren’s Callaway nuclear plant are described with examples.

  3. Presentation Outline • Part 1 – Brief Description of Callaway Met System Upgrade (Fall 2007) • Part 2 – The Role of 5sec Data in the Callaway Met QA/QC Functional Process • 1 – Early, or EXCLUSIVE, detection of problems • 2 – Determination of local instrument siting or exposure effects • 3 – Observe/Confirm Calibration Checks • 4 – Meteorological insight into the local dispersive processes. • Part 3 – Summary & Conclusions

  4. OLD Callaway Meteorological System • Measurements • Primary Tower Site • 90m: WS / WD / Sig-T / DewPt / 90-10 delta-T • 60m: WS / WD / Sig-T / 60-10 delta-T • 10m: WS / WD / Sig-T / T / DewPt / Precip • Secondary Tower • 10m: WS / WD / Sig-T / T

  5. OLD Callaway Meteorological System (con’t) • Backup tower was 1.5 miles displaced • 1980’s architecture Climatronics analogue based system • A/D sampling interval was 5 sec • (Analogue signal sampling at plant computer) • Plant Computer checked basic DQ flags and calculated 15 and 60 minute averages for ER and Dose Assessment • High Maintenance – Obsolete system and tower climbing to 90m

  6. Callaway Fall 2007 Met System UpgradeMAJOR FEATURES • Secondary Tower was Eliminated • Primary Tower was reduced from 90m to 60m in Height • Two Elevator Systems were installed. • Met-One system with CSI redundant dataloggers was installed • Added stdev’s to all measurements • Maintained transmission of 5sec data to the plant computer

  7. Callaway Fall 2007 Met System UpgradeMEASUREMENTS • Duplicate Instruments (A-train, B-train) were installed at the 10m and 60m tower levels • A-train mounting boom projects into the NW sector • B-train mounting boom projects to the S • Tower Measurements: • A10mWS, B10mWS, A60mWS, B60mWS • A10mWD, B10mWD, A60mWD, B60mWD • A10m sig-T, B10m sig-T, A60m sig-T, B60m sig-T • A10mT, B10mT, A60mT, B60mT • A60-10 dT, B60-10 dT • A10mRH (& calc dew point), B60mRH (& calc dew point) • Ground Measurements • Total Solar Radiation (new addition after much “begging”) • Precipitation

  8. Old Tower Instrument Boom

  9. Old Tower Instrument Boom

  10. New Tower Instrument Boom

  11. New Booms and Elevators

  12. New Booms and Elevators

  13. View of “New” Tower

  14. Derivation of 5sec Data at the Callway Plant • Software The 5sec Met data are accessed and graphically displayed by a plant-wide (can display all process parameters, not just the meteorological data stream) software program called eDNA Trend (hereafter just eDNA). The software has a long history at the plant and is licensed by InStep Software, LLC, 55 E. Monroe - Suite 2710, Chicago, Illinois 60603. (312) 894-7837 www.instepsoftware.com, www.ippc.com eDNA is used on local desktop PCs that communicate to an eDNA system via the eDNA distributed network architecture or on the eDNA system server. eDNA Trend displays eDNA historical data in the form of trends and plots.

  15. eDNA History With the Callaway Met Program • eDNA was used very sporadically, if at all before 2001 for the meteorological system. • 2002-2004 – eDNA was used by the met system engineers for troubleshooting failures. • In 2004, after several problems and failures went unnoticed for extended periods, the annual data review by the meteorologist was modified to include daily review of the 15min and hourly data sent from the plant. eDNA displays were created and sent to the meteorologist upon specific requests (had a lot of moisture interference on dT channels back then).

  16. eDNA History With the Callaway Met Program 2006 – After recognizing the benefits of the program, the off-site meteorologist was given Off-site Security Access to access the eDNA system. 2006-2008 – The off-site meteorologist logs-in every day to the system, executes about 40 different views of the met system data (including 5sec data), and creates a documentation file everyday to aid in later data validation. 2007 – The decision was made to include 5sec data transmission in the intended met system upgrade.

  17. eDNA Role in Callaway Data QC • 1 – Early, or EXCLUSIVE, detection of problems with daily 24hr reviews • 2 – Determination of local instrument siting or exposure effects – VERY IMPORTANT FOR NEW UPGRADED SYSTEM • 3 – Observe/Confirm Calibration Checks • 4 – Meteorological insight into the local dispersive processes.

  18. Graphics Conventions (old Data) • “Thermal” color scheme (warm ground, cool top) • 90m data in blue • 60m data in green • 10m data in red (primary tower) • 10m data in orange (sec tower) • P = Primary Tower • S = Secondary Tower

  19. Graphics Conventions (new Data) • Unless Noted, all plots are 24hrs across x Axis • Colors Somewhat Variable but mostly: • A10m data in blue • B10m data in red • A60m data in green • B60m data in light blue

  20. Examples of Daily Generated Plots • With eDNA templates already setup, generate about 50 graphical displays each night (5sec, 15min, and stability calcs) • Few simple commands will export all displayed data into Excel Template for Sorting or Difference Analysis

  21. eDNA 5sec: All 4 Temperature Channels

  22. eDNA 5sec: A10mT and B10mT

  23. eDNA 5sec: A60mT and B60mT

  24. eDNA: A10mWS and B10WS (2 gust fronts)

  25. eDNA 5sec: Same graph, enlarged, 2 ½ hrs. Did you see the bird “perching”???

  26. eDNA 15min: Still same 10mWS. Find the bird problem in the 15min data??

  27. eDNA 5sec: 10mWD (A & B channels)

  28. eDNA 5sec: 60mWD (A & B channels)

  29. eDNA 15min: 10mWD (A & B chennels)

  30. eDNA 15min: 60mWD (A & B chennels)

  31. eDNA 5sec & 15min: both 60m WD’s and 60m Sig-theta

  32. eDNA 5sec: Both RH Channels

  33. eDNA 5sec: RED=SolRad, BLUE = 60-10 dT

  34. eDNA 5sec: Same Slide. Did you notice that it got dark late morning – Big storm complex. That helps explain the daytime stable period.

  35. eDNA Daily Review Summary • Those 13 slides you saw for 6/24/08, plus 15-30 more depending on the complexity of the weather, will greatly define the meteorology of the day. • It only takes about 45mins to create, review, and document unless troubleshooting is needed. • If more analysis is needed, a very simple and quick few commands can import all the 5sec data for the day into an Excel template which has been setup to create difference analysis plots. We’ll see that when we look at tower shadow zones.

  36. eDNA Problem Discoveries • The eDNA 5sec graphics display has been used to find following problems: • Unstable temperature channel due to a sticking relay (was “stepping” with changes). • Intermittent failure of a dew point sensor (failure mode was a sine-wave form). • Intermittent bird perching on both WS and WD sensors (has damaged WD). • A bad program instruction which resulted in bad 10m Sigma-theta’s but bad 60m calcs.

  37. eDNA Problem Discoveries (con’t) - Found that random wind directions were being transmitted when the potentiometer was in the 355-360 degree dead zone. These spurious data can affect sigma-theta more than WD. Through the higher resolution data graphics we have also been able to determine a slight bias introduced in the temperatures as a function of solar radiation.

  38. eDNA 5sec plot showing WD data scatter with 355-360 deg WD

  39. eDNA Another eDNA 5sec plot showing WD data scatter with 355-360 deg WD

  40. Use of eDNA to examine tower shadow effects on met data measurements. • With the addition of the two elevator systems increasing the cross-sectional density of the tower, it was not surprising to see effects on the met data when flow was through or near the tower. • The eDNA 5sec data were used for many days to plot effects (WS, WD, Sig-T) as a function of appropriate WD to find the exact interference zones (different for each sensor). The 5sec data give a real cause & effect result because there is no averaging, only the assumption that the meteorology is constant over a 10 ft scale.

  41. eDNA Tower Shadow Determination (con’t) • We will look at several daily eDNA derived plots for the A60m WS sensor only. Only the Blue 60m data are therefore appropriate. • All data plots show the difference between the A60mWS and the B60mWS 5sec values, sorted by B60m WD. • Vertical scale is -10 mph to +10 mph • Horizontal scale is B60m WD, 0-360 deg (or whatever the range was that day) • Each plot contains all 17,280 values for each parameter for a 24hr period.

  42. A60mWS Interference Zone this day: = 124-159 deg

  43. A60mWS Interference Zone this day: = 125-164 deg This is B60mWS BeingAffected

  44. A60mWS Interference Zone this day: = 122-160 deg This is B60mWS BeingAffected

  45. A60mWS Interference Zone based on 15min data for Oct ’07 to March ’08 (106-172 deg)

  46. eDNA Data Can Be Used to Check/Confirm Reported Calibration Values

  47. eDNA Data / Excel Can Be Used to Check/Confirm Reported Calibration Values

  48. Oh the Wonders of Weather For the true blue meteorologist there is nothing like breaking the boredom of a stagnant high pressure pattern with gravity waves, instability waves, undercutting gust fronts, vane rotations, etc., etc., etc. The 5sec data can provide additional insight to the real atmospheric dynamics, not that watered down version you get from 15min data, or God forbid, hourly averages. A couple of examples…..

  49. 90m, 60m, 10m Wind Speeds for 10-01-06. Who needs delta-T to determine stability?

More Related