Microgrids. EEI TDM Meeting Charleston, South Carolina October 7, Neal Bartek Smart Grid Projects Manager

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1 Microgrids EEI TDM Meeting Charleston, South Carolina October 7, 2013 Neal Bartek Smart Grid Projects Manager 2012 San Diego Gas & Electric Company. All trademarks belong to their respective owners. All rights reserved.

2 San Diego Gas & Electric Subsidiary of Sempra Energy Regulated public utility Provide safe & reliable energy service to 3.4 million consumers million electric meters - 840,000 natural gas meters 4,100 square mile service territory in San Diego & southern Orange Counties (25 cities) Owns 1,835 miles of electric transmission lines and 21,601 miles of electric distribution lines Operates two compressor stations, 166 miles of natural gas transmission pipelines, 8,100 miles of distribution pipelines and 6,197 miles of service lines 4,500 employees 2

3 Drivers Growth in Commercial/Residential Solar Generation Net Energy Metering (NEM) production hides load Ability to create voltage issues and excess equipment operations

4 Drivers Fast Forward to 2020 Rule 21 is being revisited to consider requiring smart inverter functionality Smart Inverters have the ability to respond to control signals from the utility Forecasted peak load < 5000 MW On pace to exceed 40% growth in

5 Drivers San Diego s Solar Rooftops More than 28,000 rooftop solar installations in San Diego Produce more than 202 MW of clean electricity 5

6 Microgrids Microgrids: Manage DER Manage voltage and power quality at local level 6

7 Microgrid Opportunities Support the integration of renewable resources Improve reliability and power quality Support emergency operations Ability to ride through outages Optimize energy usage Enable participation in new markets for demand response and ancillary services 7

8 Borrego Springs Microgrid Demonstration Project Utilize advanced technologies to integrate and manage distributed resources within the Smart Grid Budget: Benefits: $8.0M DOE and $2.8M CEC plus matching funds from SDG&E and partners Integrate and leverage various generation and storage configurations Reduce the peak load of feeders and enhance system reliability Enable customers to become more active participants in managing their energy use Distributed Energy Resources Substation Energy Storage Customer Energy Management Microgrid Controller Home Energy Feeder Storage Automation Community System Energy Technology 8 Storage

9 Site Selection Borrego Springs Key Strengths: Borrego Springs Progressive-minded community High concentration of customerowned solar generation Potential for reliability enhancements Opportunity to balance supply and demand to be more self-sufficient Extendable to service territory

10 Real World Experience 6/23/12 Planned Outage Microgrid provided power to 2,128 customers for ~ 5.5 hrs Q conducted 7 planned islanding events over 3 days 4/8/13 windstorm Microgrid provided power to 1,225 customers for ~ 6hrs 8/25/13 flash flood CES units islanded six customers for ~ 5.5 hrs 9/6/13 intense thunderstorms Microgrid provided power for up to 1,056 customers for > 20 hrs 10

11 CES Islanding Event 4/8 Residential customer islanded after grid outage Customer remained with power for approximately 5 hours after outage occurred 11

12 CES PV Smoothing Operation Units capable of smoothing intermittency caused by fluctuating power output Operational variables can be user-defined i.e. Ramp rate control, time constant Power(kW) :55 PM 2:09 PM 2:24 PM 2:38 PM 2:52 PM 3:07 PM 3:21 PM 3:36 PM Blue Line Red Line 12

13 Acknowledgements Acknowledgement: This material is based upon work supported by the Department of Energy [National Nuclear Security Administration] under Award DE-FC26-08NT02870 and DE-FC26-08NT Disclaimer: This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product or process disclosed, or represents commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do no necessarily state or reflect those of the United States government or any agency thereof. LEGAL NOTICE This report was prepared as a result of work sponsored by the California Energy Commission (Energy Commission). It does not necessarily represent the views of the Energy Commission, its employees, or the State of California. The Energy Commission, the State of California, its employees, contractors, and subcontractors make no warranty, express or implied, and assume no legal liability for the information in this report; nor does any party represent that the use of this information will not infringe upon privately owned rights. This report has not been approved or disapproved by the Energy Commission nor has the Energy Commission passed upon the accuracy or adequacy of the information in this report. COPYRIGHT NOTICE

14 Thank you! Neal Bartek, 14