Presentation by Gabriel Miller and Nathan Barber, Tennessee Valley Authority, at the Delft-FEWS - International User Days, during Delft Software Days - Edition 2017. Thursday, 26 October 2017, Delft.

1. Delft-FEWS User Days
Gabriel Miller and Nathan Barber
10/27/2017

2. What is TVA?
A power company
and so much more…

3. Our Mission:
Serving the people of
the Tennessee Valley
to make life better.
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4. What We Do
Partner with 154 local power companies,
to serve 9 million people and 700,000
businesses in parts of seven states.
Directly serve 58 large industries and federal
installations.
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5. TVA’s Mission of Service
5
Energy Economic
Development
Environment

6. Coal
Nuclear
Hydro
Gas
Purchased Power
Energy Efficiency and
Demand Response
The TVA Power System
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Current

7. Rivers of the United States
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8. Tennessee Valley Watershed
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9. River System Management
29 hydroelectric dams
Flood damage averted:
$240 million annually
$7 billion averted
since 1936
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20 non-power dams
$12 billion in recreation
benefit

10. Integrated Tennessee River System
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Navigation
Flood-Damage
Reduction
Water Quality
Recreation
Power Generation
Water Supply

11. Hydropower Generation
• Conventional generating capacity (109 units): 3,538 MW
• Pumped Storage generating capacity (4 units): 1,653
MW
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Thermal Compliance/Cooling Water
• Schedule flows to minimize thermal derates at nuclear plants due to high river temperatures
• Provide cool, abundant water to nuclear and fossil plants
Water Supply
• Industrial process water and cooling water
• Municipalities water supply
Water Quality
• Minimum flows, aeration, and monitoring
• Oxygen starved water behind the impoundment is “aerated” before being released

12. TVA FEWS System
• Three year project
- Converted in-house forecast
system to standard models and
Delft-FEWS system
- Migration from 100+ programs to
one unified platform
- Vastly improved data
visualization and reports
• Went live Feb 7th 2017
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13. TVA’s Forecasting
Process
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2
Storage
inventory
and
inflow
analysis
3
Reservoir
inflow
forecasting
4
Tributary
routing
5
Upper
main river
routing
6
Review
water
release
schedule
7
Routing
from
Guntersville
to Pickwick
8
Kentucky/
Barkley
Routing
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Information
dissemination
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Monitor
system
1
Collect
and
verify
data
• 24/7 Operation
• Constant system monitoring
• Hydropower schedule
produced twice daily

14. Realtime Monitoring
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15. Data Collection and Validation
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16. Hydrologic Models (Inflows)
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QPE Selection
QPF Selection
Inflow Modeling
Finalize for Scheduling and Hydraulic Modeling

17. Scheduling the River
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• Two Primary Riverware
• 6-Hour Model
- Model reservoirs at 6-hour time
steps for 14 days
- Simulation/optimization mode
• Preschedule Model
- Model reservoirs at hourly time
steps for 3 days (using 6-hour
model volumes)
- Optimization mode

18. |18

19. |19

20. Raccoon Mountain
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21. To spill or not to spill
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22. Spill Orders
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23. Hydraulic Models
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24. |24

25. Final Products
• Schedule – Current day schedule of hydro generation
• Preschedule – Forecast of hydro generation
• Stage Forecasts on the Tennessee River
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26. Hydrothermal Modeling
• Water Temperature
forecasting for TVA coal and
nuclear power plants
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27. Hydrothermal – Delft3D Integration
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28. Open Archive
• All historical
observations transferred
to Archive
• All real-time forecasts
and observations stored
in Archive
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29. Data Warehouse/Reporting Workflow
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FEWS REST
Web Setvice
Web Report
Server
Validated Reporting
Workflows
Canned Reports
FEWSArchive
DW
Cubes
Ad-Hoc Reporting
SSRS
FEWS Central
Database

30. Reporting Dashboard
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31. Example Reports
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32. | 32

33. | 33

34. Wiki
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35. Endpoint Monitor
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36. Future Plans
• Verification and Performance Scoring
• Ensemble Prediction
• Real-time Inundation Mapping
• Long-term Optimization Modelling
• Operational Delft3D hydrothermal models
• Public-facing webservice/Updated mobile application
• Watercoach training modules
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