Mike Montoya - SCE

SCE Smart Grid Creating a Cleaner, Smarter Energy Future Mike Montoya May 18, 2010

Southern California Edison An Edison International Company •  Serve a population of about 14 million people in a 50,000-square-mile service area within central, coastal and Southern California •  5 million electric meters PG&E •  12,000 circuit miles of transmission lines and more than 111,500 circuit miles of distribution lines •  5,000 MW of generating capacity from interests in nuclear, hydroelectric, and fossil- fueled power plants •  Award-winning energy eﬃciency & DR customer programs •  Industry leader in renewable energy, electric LADWP transportation, Smart Grid and smart SDG&E metering 2 © Copyright 2009, Southern California Edison

SCE’s Smart Grid Vision SCE’s vision of a smart grid is to develop and deploy a more reliable, secure, economic, eﬃcient, safe and environmentally- friendly electric system covering all facets of electricity from production through transmission, distribution, and its smart use in homes, businesses and vehicles. 3 © Copyright 2009, Southern California Edison

Renewable & DER Growth California is Pushing Beyond Limits of Current Grid Capabilities CA Renewables Portfolio Standard •  20% by 2010 2008 Renewables Summary •  33% by 2020 (Governor’s Exec Order) Lg Rooftop Solar PV Program •  500 MWs by 2015 •  250 MWs by SCE & 250 MWs by IPP •  ~ 350 projects at 1-2 MWs each California Solar Initiative (CSI) •  Goal of install 3,000 megawatts (MW) of new, customer-side solar photovoltaic projects by 2017 5 © Copyright 2009, Southern California Edison

Signi cant Increase in New Wind Resources Potential 7x Increase in Total Wind Energy to 15 Billion kWh From “Brie ng on the CAISO Renewable Integration Study”, October 17,2007 6 © Copyright 2009, Southern California Edison

Identi ed Issues on the Bulk Power System (Wind) •  System spinning reserve requirements will change due to the uctuation in wind generation •  Reactive power planning requirements (VARS) will change due to the uctuation of wind generation •  Wind generation does not contribute to the main system frequency control •  Inter-area oscillations may occur due to the lack of inertia from Type 3 and Type 4 wind turbines 7 © Copyright 2009, Southern California Edison

Solar Intermittencies •  Seasonal, Daily, Minute PV Power Fluctuating •  PV Inverter – Grid Interactions •  Low Capacity Factor < 20% •  Inaccurate forecasting •  No cost eﬀective grid storage yet 8 © Copyright 2009, Southern California Edison

PEV Adoption Forecast for SCE Service Area Early Market (2010-2014) (in thousands) •  Modest number of PEVs; •  Early adopters with high expectations; •  Uncertainty around market development; and •  New policies and standards developed & implemented. Growing Market (2015 +) •  Growing number of PEVs; •  Some clarity around customer charging behavior and impacts to electric grid; and •  Growing signi cance of load We are in the early days. All of us – policy management. makers, auto manufacturers, auto dealers, utilities – need to gure it out together. 9 © Copyright 2009, Southern California Edison

Engaging Customers in the Supply Chain By 2020, in SCE’s service area there may be as many as 10 million intelligent devices1 linked to the grid providing sensing information and automatically responding to prices/event signals 1. Includes smart meters, energy smart appliances and customer devices, electric vehicles, DR, inverters and storage technologies 10 © Copyright 2009, Southern California Edison

Transmission: Renewables Integration •  Increase transmission capacity to integrate more bulk renewable energy resources •  Implement Synchrophasors & Wide Area Controls to enable enhanced grid monitoring and controls •  Provide real-time Voltage, VAR & frequency support to mitigate volatility •  RD&D on advanced inverter technology to signi cantly improve integration •  RD&D on large scale energy storage systems 11 © Copyright 2009, Southern California Edison

Distribution Automation •  Enable distributed energy resources and storage to support customer choice and improve grid stability •  Develop new technology for dynamic Volt/VAR and harmonics control to provide quality service and enable voltage conservation •  Minimize customer outages due to distribution system failures through expansive automation Avanti - Circuit of the Future •  Development of superconducting devices such as fault current limiters and transformers 12 © Copyright 2009, Southern California Edison

Edison SmartConnect™: Empowering Customers •  Choice to Manage Cost & Peak Demand –  Rates •  Time of Use and Tiered Rates •  Critical Peak Pricing (CPP) •  Peak Time Rebate (PTR) –  Programs •  Smart Communicating Thermostats –  Outcome •  Reduce Peak Load by 1,000 MWs •  Energy Information Drives Conservation –  Reduce Residential Energy Consumption by 1% (minimum) –  Reduce GHG by 365,000 tons/yr •  Automated Self-Service –  Remote Service Switch –  Payment and Billing Options © Copyright 2008, Southern California Edison 13 © Copyright 2009, Southern California Edison

Customer Bene ts •  Enable state and federal energy policy goals –  Renewables Portfolio Standard (RPS) –  California Solar Initiative (CSI) –  Assembly Bill 32 •  Maintain levels of service reliability as increasing levels of renewable and distributed energy resources are incorporated into the transmission and distribution systems •  Empower customers by providing actionable information and better tools to manage their energy costs and conservation eﬀorts •  Improve grid security, safety, and reliability •  Create the processes and deploy the infrastructure needed to support the projected adoption of plug-in electric vehicles 14 © Copyright 2009, Southern California Edison

SCE Smart Grid Development Building on Smart Foundation Built Over the Past Decade ~$1.5 Billion Capital* Smart Grid Development 2009 2010 2011 2012 PEV Integration Renewable Integration Tech Dev. Enhanced Outage Management Expanded Distribution Automation Centralized Remedial Action Schemes Phasor Measurement Substation Security Video Surveillance Energy Management System Upgrade Advanced Load Control Smart Metering * Project capital approved by CPUC in SCE’s 2009 GRC & SmartConnect program 15 © Copyright 2009, Southern California Edison

SCE Smart Grid Development Statistics •  Total synchrophasors on bulk transmission system = 27 •  Advanced energy management system (EMS) = Yes •  Total substations automated (% of 900 substations) = 56% •  Total substation transformers with dissolved gas analysis (DGA) = 0% •  Total substations with low latency, high bandwidth telecoms = 33% •  Distribution management and load control systems = Yes •  Total circuits with outage mitigation (% of 4,400 circuits) = 41% •  Total circuits with eld automation (% of 4,400 circuits) = 41% •  Total microprocessor relays = 31% •  Total ber optic cable miles = 3,100 •  Total renewable resource capacity integrated –  Transmission = 2,784 MW –  Distribution = 2.4 MW •  Total demand response (DR) capacity = 1,548 MW •  Smart metering –  Large commercial and industrial (C&I) customers = 100% –  Residential and small commercial and industrial (C&I) customers = 635,000+ meters 16 © Copyright 2009, Southern California Edison

What is Needed to Realize a Smarter Grid? •  Intelligent and communicating PEVs that integrate gracefully with the grid •  Cost eﬀective energy storage at bulk transmission and distribution •  Commercial products based on open, non-proprietary standards that are secure •  Seamless and secure telecommunications infrastructure that integrates millions of intelligent devices to produce actionable information that is used to control the electric system •  Workforce with the skills and knowledge to engineer, build, operate and maintain an electric grid with pervasive information technology embedded 17 © Copyright 2009, Southern California Edison

Observations •  Smart Grid is a journey that will be 20+ years in the making –  Personal computing was introduced 30 years ago –  Portable cell phones were introduced 25 years ago –  Public Internet was launched 20 years ago •  Pace of technology adoption will need to consider policy, customer impact, utility operations and asset obsolesce •  A smarter electric grid will become more interactive with our customers’ lives thru the home, transportation and workplace 18 © Copyright 2009, Southern California Edison

For more information on SCE’s Smart Grid strategy, news, and updates, go to: www.sce.com/smartgrid For information on careers with Advanced Technology, please email Lee Cordner at Lee.Cordner@sce.com 19 © Copyright 2009, Southern California Edison

Distribution System Impacts T&D System Drivers & Modeling & Financial Impacts Concerns Analysis Impacts •  Large, mobile load •  Circuit and sub- •  Wide range of system •  Over 95% of nancial with local circuit component impacts depending impacts due to distribution modeling/ on density of PEV transformer and circuit/ impacts simulation of clustering, vehicle substation upgrades incremental impacts counts, etc. •  May double •  SCE will apply for household peak •  Incorporate hybrid •  Anywhere from 1 to recovery PEV-related usage adoption and 10% of transformers costs through its General “handraiser” data forced beyond Rate Case •  Uncertainty of loading limits charging level, •  Measure incremental •  Some costs may be time of day, PEV impacts by •  Adverse impacts on 4 mitigated by optimization geographic comparing to base to 11% of system with infrastructure location load growth circuits and replacement and with substations other smart investment •  More than 4,300 circuits to assess programs 21 © Copyright 2009, Southern California Edison

Key Policy & Market Issues Over the next year, a number of key issues will need to be decided by utilities and regulators (e.g., through the AFV OIR process) Jurisdictional Issues: How should EV service providers be regulated if they will provide electric services to retail end-use customers? Non-customary Loads: At what charging level should a customer be required to pay for system upgrades associated with new load? Cost Allocation: Who should pay for the upgrades associated with PEV load and the associated procurement and emissions obligations? Charging Infrastructure: How will suﬃcient charging infrastructure be installed to support market adoption, particularly with respect to public and multi-family dwelling access? Utility Role: What opportunities exist for utilities within the market, and where will they be needed to ll in gaps (if at all)? 22 © Copyright 2009, Southern California Edison

Mike Montoya - SCE

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