Joint NWHA and NHA Northwest Regional Meeting. Is Pumped Storage in Your Future? Mark W. Killgore, P.E., D. WRE. October 29, 2009

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1 Joint NWHA and NHA Northwest Regional Meeting Is Pumped Storage in Your Future? Mark W. Killgore, P.E., D. WRE October 29, 2009

2 Wind Interconnection Challenges Wind Variability Hourly Daily or Weekly Annual Voltage Control Reactive Power System Harmonics Low (or Zero) Voltage Ride-Through

3 Wind Resource Balancing Utilize Entire Resource Portfolio to Balance Wind Hydroelectric (Fast response to AGC) Gas fired CCCT (Set-point control, flexible) Gas fired SCCT (Fast ramp capacity) Long-term Contracts (Some flexibility) Spot Market Buy/Sell (Opportunity cost) Coal fired Steam (Slow response) Wind Spill (Set-point control, Curtailment option) Differing Resource Stack to Balance Wind System Conditions Unit Status Wind Up-Ramp Unit Load Wind Down-Ramp Boundary Conditions Voltage Control Needs Plant / Market Economics Bulk Energy Storage is a Key Enabling Technology

4 Lower Snake River Wind Project Hopkins Ridge Dayton Pomeroy Construction anticipated to be phased in 250 MW blocks First phases in service 2011 and 2012 (1432 MW ultimately> 430 MW existing Hopkins Ridge and Wild Horse) Real estate rights largely secured Project first in BPA interconnection queue PSE granted 800 MW of BPA transmission in network open season process

5 Energy Storage Technologies New License Applications at FERC 34,000 MW in New Hydro Projects 20,000 MW are Storage Projects Distributed Scale Batteries Flywheels Thermal Storage Regenerative Fuel Cells Hydrogen Conversion High-Power, High-Energy Super Capacitors Large Scale Pumped-Hydro Storage Compressed Air Energy Storage Problems High $/kw cost Efficiency Penalty

6 Variable Generation Solutions Operational Solutions Central Dispatch of Wind Facilities Automatic generation control on appropriate hydro & thermal units Enhance turn-down of existing non-hydro generating units (gas or coal-fired) Add generation projects having Load Following flexibility and/or Dispatch Capacity Improved wind forecasting accuracy of Ramps and Hour-Ahead Last Resort: Spill Wind Generation Policy Solutions Balancing Authority pooling to share load-following & reserve capabilities Schedule energy trading with smaller blocks and shorter durations Build / Upgrade transmission paths to renewable energy zones Smart-Grid technology deployment NHA working with AWEA on national solutions Storage Solutions Investment or combo tax incentives for Energy Storage Deploy bulk energy storage systems

7 Political Support

8 Political Support

9 Quotable Quotes We should start to invest heavily in pumped hydro storage. Energy Secretary Dr. Steven Chu, National Clean Energy Project [Feb 23, 2009] "The National Clean Energy Project is an initiative to forge new partnerships among industry, government, and advocacy organizations in pursuit of a new national energy policy that rebuilds our economy, frees us from dependency on foreign oil, and preserves our climate and our planet."

10 Working Together The Northwest Wind Integration Forum presents Pumped Hydro Storage Workshop October 17, :00 AM - 4:00 PM Northwest Power and Conservation Council 851 SW Sixth Avenue, Suite 1100 Portland, OR Rick Miller a panelist /10/Default.htm

11 What is NHA Doing? Pumped Storage Development Council Inaugural Meeting July 28, 2009 at 2009 Waterpower Conference -Spokane, WA Chaired by Dave Youlen (Freeflow Power) and Scott Flake (SMUD) NW Interest Group chaired by Mark Killgore Puget Sound Energy Survey on Pumped Storage Revenue Recognition

12 Panel: Is Pumped Storage in Your Future? Moderator: Mark Killgore (Puget Sound Energy) Panel: Mark Jones (Bonneville Power Administration) Kevin Nordt (Grant County Public Utility District) Dave Hanson (Sacramento Municipal Utility District) Rapporteurs Kirby Gilbert (MWH) and Wayne Dyok (Tetra Tech)