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Joint California Energy Commission and California Public Utilities Commission Bulk Storage Workshop...
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Transcript of Joint California Energy Commission and California Public Utilities Commission Bulk Storage Workshop...
Existing Large - Scale Pumped Storage Projects
Joint California Energy Commission and California Public Utilities Commission
Bulk Storage Workshop November 20, 2015
Kelly RodgersEnergy Program Manager
2
San Diego County Water Authority Wholesale water agency created
by State Legislature in 1944 24 member agencies 36-member board of directors Serves 3.2 million people and
region’s $218 billion economy Service area
950,000 acres 97% of county’s population
Imports up to 90% of water used in San Diego County
Builds, owns, operates and maintains regional water infrastructure
Largest member agency of Metropolitan Water District of Southern California
3
Lake Hodges Pumped Storage Facility
Location Escondido, CA
Commissioned September 2012
Upper Reservoir(Water Authority owned)
Olivenhain Reservoir (24,000 acre-feet)
Lower Reservoir(City of San Diego owned)
Lake Hodges (33,500 acre-feet)
Installed CapacityTwo VFD Units (28,000 HP each)40 MW Generating41.4 MW Pumping
4
Growing Need for Flexibility
Source: CAISO Website
Outp
ut in
kW
H
6
CAISO Curtailment Forecast
Source: CAISO Website
Can use excess renewable energy during periods of overgeneration
Avoids curtailment and contributes to renewable energy percentage
Non-greenhouse gas energy source can be used later as solar and wind come off line
Highly flexible energy Water-energy nexus – water
rate stabilization
7
Benefits of Pumped Storage
Source: CAISO Website