Wayne Todd - Northwest Hydroelectric Association
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Transcript Wayne Todd - Northwest Hydroelectric Association
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Bonneville Power Administration - Pumped Storage Evaluation
Northwest Hydroelectric Association Meeting Feb 24, 2011
Pump-Generating Plant
Lake
Roosevelt
Pipe to the
Feeder Canal
and Banks Lake
Reclamation’s John W. Keys III Pump
Generating Plant at Grand Coulee
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Wind Power is Growing Fast !!!
Utility Balancing
Authority
Installed
Wind
(A)
Peak
Load
(B)
Wind
Penetration
(A/B)
PacifiCorp East
860
5,689
15%
PacifiCorp West
PNM
Northwestern
Energy
CAISO
ERCOT
BPA 2009
BPA 2010
250
200
3,555
2,500
7%
8%
150
1,724
8%
2,800
5,800
2,600
3,379
49,071
62,400
10,500
10,500
6%
9%
25%
32%
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Energy Storage for Support of Wind Integration
“I want to assure you the Administration places a priority on
improving the Nation's capabilities to integrate renewable resources
into its electricity supply. I support the full exploration of pumped
storage potential in the context of providing necessary intermittent
renewable integration services. Pumped storage has unique potential
in the Pacific Northwest where a higher percentage of wind generation
has already been integrated into the region's transmission system
than anywhere else in the Nation.”
─ U.S. Energy Secretary Steven Chu,
in a letter to the Governors of Oregon, Washington, Idaho, and
Montana; July 10, 2009
The Northwest Power and Conservation Council draft 6th Power Plan
points out that pumped storage is one of the few storage concepts
with “bulk” storage potential.
BPA’s draft Resource Program considers that pumped storage could
provide BPA with a unique opportunity to return flexibility to the
Federal hydro system.
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Wind Generation in the Last Week
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“Accurate Scheduling Model”
Actual accumulated generation imbalance
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Pumped Storage Evaluation – Overall Plan
Summer-Fall 2009
Information Gathering
Fall 2009 - Present
Pumped Storage Evaluation
Add Pumped Storage
to an Existing
Federal Facility
USACE
USBR
1. Evaluate Storage
Technology Options (PNNL)
2. Evaluate State of the Art
Pumped Storage
(MWH/USACE)
Specific Build Decisions
System Analysis, Design
Parameters, and
Economics
Contract Awarded to
HDR/DTA
3. Pumped Storage Forum
(USACE/BPA)
Voith, Toshiba, Alstom, Andritz
New Federal Pumped
Storage Project
USACE
USBR
Non-Federal Pumped
Storage Project
Purchase Use
Partnering
Arrangement
Banks Lake Pumped
Storage
4. Banks Lake Pumped
Storage Evaluation (USBR)
Equipment Upgrades
Expansion
Alternatives
Operational Changes
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Banks Lake Pumped
Storage
Improvements
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HDR/DTA Report
Hydroelectric Pumped Storage for Enabling Variable Energy Resources
within the Federal Columbia River Power System
• Pumped storage has significant potential in the Pacific Northwest…
• Keys Pump-Generating Plant is underutilized and with modernization and
potential upgrades can be a near term resource for wind integration.
• Grid scale energy storage would be a valuable asset for long term expected
levels of wind in the future.
Recommendations and Suggested Next Steps:
─ Model Development - Develop Tools to more accurately assess the capabilities of
─
─
─
pumped storage to enable the integration of higher levels of variable generation in the
FCRPS.
Keys Pump-Generating Plant - Pursue Equipment Modernization and Upgrades
Greenfield Project – Continue evaluation of a greenfield pumped storage project
Regional/National Communication – Pursue regional collaborative evaluation of a
greenfield pumped storage project
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Bureau of Reclamation
Technical Service Center
• John W. Keys III Pump Generating Plant, Columbia Basin Project
Special Report
October 2009
• Appraisal Level Technical Evaluation for Modernization of John W. Keys III
Pump Generating Plant, Columbia Basin Project
Phase II Planning Study
February 2011
Funding Agreement for Evaluation of Keys Pump-Generating Plant Modernization signed
by BPA and Reclamation on June 15, 2010
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John W. Keys III Pump Generating Plant
Original installation in 1951
six 50 MW pumping units
Upgrade in 1973
two 50 MW pump/generators
installed
Upgrade in 1983-84
four 53.5 MW pump/
generators installed
Current Capacity
Pumping – 12 Units 614 MW
Generating – 6 Units 314 MW
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Keys Pump-Generating Plant Assessment
USBR Technical Service Center and HDR Recommendations Under Evaluation:
─ Modernization
• Excitation
• Governors
• Breakers
• Unit Controls and Protection
• PG Phase Reversal Switches
• Pump Motor Disconnect Switches
• PG7 & 8 Wicket Gate Operating Mechanism Improvements
• Main Step-up Transformer & Transformer Disconnect Switches
• Station Service Upgrades
• Miscellaneous Balance-of-Plant refurbishment
• Estimated Cost $85-$145M
─ Upgrade of Pump-Generator Units 7-12
• Preference is to increase the operating head range of the PG units
• Secondary goal is to increase Capacity (a 20% increase would result in pumping
•
capacity – 660MW, generating capacity – 360MW)
Estimated Cost $80-$140M
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HDR/DTA Report – Greenfield Pumped Storage Examples
Project Feature/Characteristic
Project X1
Project X2
Upper Reservoir
New off-channel reservoir
New off-channel reservoir
Storage Volume (ac-ft)
15,000
3,000,000
Active Surface Area (acre)
282
11,750
Dam Height (ft.)
150
780
Max. Water Surface Elev. (msl)
2,436
2,159
New off-channel reservoir
Existing reservoir
Active Storage Volume (ac. ft.)
15,000
3,000,000+
Surface Area (acres)
209
80,000
Max. Water Surface Elev. (msl)
624
1,290
Approx. Net Head (ft.)
1,700
870
Conveyance Length (ft.)
4,800
14,800
Plant Capacity (MW)
1,050
1,136
Units Sizes/Number
250/4
282/4
Est. Annual Generation (GWh)
1,560
1,760
Est. Annual Pumping (GWh)
1,950
2,200
Transmission Line Length (mi.)
5.0
7.5
Est. Capital Cost (Million $, 2010)
2,733
8,162
Cost per Installed MW (Million $)
2.603
Lower Reservoir
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7.185
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Other Potential Solutions for Integrating Wind
Transmission additions to reach/blend diverse wind projects
Generators self supply balancing reserves
Continued scheduling improvements
Explore virtual Balancing Area consolidation
Enhanced storage capability:
Conservation
Demand response
Smart Grid applications
Purchase balancing reserves from a third party
─ Batteries
─ Pumped storage
─ Compressed air
─ Flywheels
─ Plug-in electric vehicles
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Wayne Todd
Bonneville Power Administration
[email protected]
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