Dale Bradshaw CEO Electrivation [email protected] 423-238-4052. Energy Storage, The Key Enabler for the Future Smarter Grid. Why is Energy Storage Critical to Improving Affordability and Reliability. Shift wind and solar to meet the peak and make wind and solar dispatchable.
Shift wind and solar to meet the peak and make wind and solar dispatchable.
Provide demand reduction or avoid need for new capacity
Buy low cost electricity at night and run during high cost daily peaks
Provide for fast (<4 cycle) backup power for hours to improve system reliability
Delay or avoid the need to build new transmission or distribution lines in high cost areas
Provide frequency regulation and spinning reserve
Reduce carbon emissions
Reduce consumption of oil and natural gas
Typical Wind Farm Output Pattern and Reliability
Golden Valley Electric Association
NiCad – 27 MW BESS for 15 minutes for reliability improvement (3 to 82 outages covered each year)
Long Life (defined by number of charge and discharge cycles is needed)
Cycle lifetime of 5,000 to 10,000 cycle is now possible
Charging and discharging daily implies 300 or more cycles a year, 9,000 cycles in 30 years
Costs have decreased by 30% to 50%
$2,000/kW now for 7 hours of storage instead of $3,500/kW
Large battery complexes are being built in >1 Mw sizes
Acceptable efficiency of 70% or more
AltairNano Li Ti 1 MW for 15 minutes at 750 to 1050 V
Lifetime of more than 10,000 cycles of deep charge and discharge
Lowest cost battery of all the advanced options based on CRN due diligence report
Potentially very low environmental impacts
PPC ZnBr is UL, FCC, and NFPA certified
PPC has recently completed the production of its first TransFlow 2050-5 (500 kW, 2.8 MWh, 5.6 hours)
PPC has production capacity to meet the needs of the participating co-ops in this proposal.
The PPC ZnBr batteries are made in the U.S.
PPC is well capitalized.
PPC ZnBr has the potential for fast frequency regulation and nearly unlimited cycle life.
Confirmed addition of a TF-2050-7 for Kotzebue Electric Association (KEA) in Kotzebue Alaska to provide:
Time shift wind to daily peak
Frequency regulation and spinning reserve
Reduce diesel generator start-ups and O&M
Improved fossil plant efficiency
Other possible future projects in Kauai, South Carolina, and Floriday
Capacity credit or demand charge reduction ($500/kW to $2500/kW)
Arbitrage value (Buy low and sell high ranging from $900/kW to $1500/kW)
Firming and Shifting Renewables (wind and solar)
Improved thermal plant efficiency
Reduce CO2 emissions from thermal plants
Improve Thermal Plant Reliability
T&D capital asset deferral ($200/kW to $1300/kW)
Avoid or delay need for second transformer or transformer bank
Reduced congestion and line losses
Frequency regulation ($1600/kW to $4000/kW)
Dynamic VAr Support ($100/kW)
Improved service reliability
Range of Values for 6 hours of Energy Storage assuming 2% real discount ratelow gas of $3/MBtu, wind energy off-peak, 70% gas on peak, etc.
ZnBr price for 7.4 hours is about $2500/kW installed
Costs in $/kW-hr will drop (mass production) as the value for installing batteries will increase (increased costs for natural gas and oil, for carbon emissions, new capacity, etc.)
Commercial feasibility of advanced batteries will be established in 2010 with large orders possible by 2011
Example of expansion (PPC ZnBr batteries):
100 MW-hr capacity in 2008
400 MW-hr capacity in 2009
1500 MW-hr to 4000 MW-hr in 2010
G&T’s with distribution coops should examine/evaluate where application of advanced batteries can add value and reduce cost of electricity and rates.
Advanced batteries compete with CAES when natural gas price exceeds $8/MBtu with CAES at $1,000/kW or $3/MBtu at $2,000/kW assuming no carbon tax. Currently significant uncertainty in CAES capital cost and natural gas prices