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IRED-NEDO Smart CommunityShowcase 2018
October 16, 2018
© 2015 San Diego Gas & Electric Company.All trademarks belong to their respective owners. All rights reserved.
Les YoungProject Manager II
Vanadium Redox Flow Battery Demonstration at SDG&E
How Storage Fits Within SDG&E’s Mission
2
Our Mission
We improve lives and communities by building the cleanest, safest and most reliable energy company in America.
Regulatory Drivers
• CPUC Mandate AB 2514
– Initial energy deployment targets in California for utilities
– Storage goals split between Transmission, Distribution and Customer
domains
– Deployment can be shifted between domains within limits
• AB 2868
– Further deployment of 167 MW of energy storage
– Programs and investments targeted toward public sector and low-income
customers will be prioritized by the CPUC
•Distribution Resource Plan/Integrated Distributed Energy Resources
– Provides the foundation for further evaluation and deployment of DER in
California
– Changes utility systems and processes to establish DER hosting capacity and
benefit streams
Procurement Targets and Current Progress
Transmission Distribution Customer Total
Established Target 80 MW 55 MW 30 MW 165 MW
Energy Storage Use Cases
• Likely Use Cases for the Distribution System
– Renewables integration
– Equipment deferral
– Reliability (islanding/grid forming/blackstart)
Source: DOE/EPRI Electricity Storage Handbook
Existing & Planned Energy Storage Deployments at SDG&E
Substation Energy Storage – deployed adjacent to the substation interconnecting at either
distribution or transmission level
Community Energy Storage – deployed on the secondary side of a distribution transformer
Market Energy Storage Systems – deployed SES that participate in the CAISO marketplace
Distributed Energy Resource Aggregations– collections of SES and CES aggregations bundled for market
participation
Existing Pending (Approved by CPUC)
– Customer 23.91MW - Distribution 13.5MW
– Distribution 43.65 MW - Transmission 70MW
– Transmission 40MW
Existing Energy Storage 44 MW/175 MWh
Ortega Hwy 1 MW/3 MWh
&
Ortega Hwy2 1 MW/3 MWh
Pala 500 kW/1500 kWh
&
Pala2 1 MW/2 MWh
Borrego MG 500 kW/1500 kWh
&
Borrego AES 1 MW/3 MWh
Carmel Valley 1 MW/3 MWh
Redox Flow Battery, Bonita 2 MW/8 MWh
Escondido 30 MW/120 MWh
El Cajon 7.5 MW/30 MWh
SDG&E / SEI VRF History
• The Japanese government, via NEDO and Sumitomo Electric, sought a California IOU partner for a United States demonstration project
• NEDO was providing $20M to fund Sumitomo to manufacture and install the battery plant
• NEDO and Sumitomo wanted to provide a full-scale system, between 2-8 MW interconnected and operated on an IOU’s distribution system
• Support any use cases determined by the IOU to be most beneficial
• SDG&E was chosen as the IOU member to partner with Sumitomo.
• Sumitomo Electric and SDG&E signed an agreement in April 2016
• Redox Flow battery was installed at the Miguel substation in Bonita, CA 2MW/8MWh
• The Redox Flow Battery was fully operational June 2017
23
SDG&E VRF Connection Network
23
VRF – Miguel Substation Installation
0
1
2
3
4
5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Average Hourly Power Profile
January February March April May June July August September October November December
Circuit Information
• Site : Adjacent to SDG&E Substation• Connected feeder line :
• 12 kV Overhead• High PV Penetration, duck curve• Increasing load, needs of deferral
11.85
11.9
11.95
12
12.05
12.1
12.15
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Average Hourly Voltage Profile
January February March April May June July August September October November December
• Battery Size : 2 MW, 8MWh – Two Battery banks
• Functions : peak shaving and base loading, capacity firming, voltage regulation, frequency regulation
Substation
Voltage regulation
Voltage regulationCapacity deferralCapacity firm ing
Energy storage
Example of Operation
Example of Operation
Peak Shaving & Base Loading (flatten the load curve of feeder)
Connected to the Circuit
Manual setting, not optimized
6/22
8am 10am 12pm 2pm 4pm 6pm 8pm 10pm
6/23
12am 2am 4am 6am 8am 10am 12pm 2pm
2MW
1MW
3MW
Example of Operation
6/22
8am10am 12pm
3.116
MW
2.116
MW
1.116
MW
4.116
MW
6/24
12am 2am 4am 6am 8am 10am 12pm 2pm 4pm 6pm 10pm
6/25
12am 2am 8am 10am 12pm 2pm8pm 4am 6am 4pm
Summary of Operations from June 2017 to July 2018
Summary of Lessons Learned
Needs
- Market participation
- Mitigate intermittency of PV
- Store excess renewables
- Ramp support
Customers
- Bill control
- Outage mitigation
Use Case Drives Technology Choice
- Power vs. energy
- Technology cost
- Technology safety
Challenges & Barriers Exist
