Smart Grid City: A blueprint for a connected, intelligent grid community Dennis Stephens Director, Utility Innovations and Smart Grid Investments OSI

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Slide 2 Smart Grid City: A blueprint for a connected, intelligent grid community Dennis Stephens Director, Utility Innovations and Smart Grid Investments OSI Users Conference September, 23 2008 Slide 3 3 Drivers for change Grid reliability Aging assets, heightened demands Environment: Global climate change Legislative mandates for green power Energy Security: Homeland security Dependence on foreign oil Customer Choices: Growing needs and expectations Desire for greater flexibility and options Slide 4 4 The Market other efforts Smart meters Demand side management and distributed generation Superconducting cables Energy storage devices Intelligent home/Smart appliances Automatic power power restoration and correction for voltage, frequency and power factor issues Renewable energy sector growth Slide 5 5 Xcel Energy - Smart Grid vision & approach First to present a comprehensive solution Broad portfolio of new technologies & projects Encompassing the entire power pathway Fuel source to end-use consumer Collaborative model Shared risk, shared rewards Focus on environmental aspects Uniquely positions Xcel Energy Slide 6 6 Accenture Current Group GridPoint OSI Soft Schweitzer Engineering Laboratories Ventyx Xcel Energy imagine. inspire. innovate. Slide 7 7 SmartGridCity - Boulder, Colo. An international showcase of smart grid possibilities a comprehensive demonstration of an intelligent grid community Test technology Integrate smart grid portfolio of projects Prove benefits Slide 8 8 Boulders Key Strengths Ideal size (50,000 customers/meters) Ideal geographic location (easy access to needed grid components) Ideal Smart Grid consumers: Web-savvy, early adopters Environmentally aware Collaborative opportunities with: University of Colorado National Center for Atmospheric Research National Institute of Standards and Technology City leaders Slide 9 9 SmartGridCity Involves the entire energy pathway from the power source to the home and all points in between Rich in IT High-speed, real-time, two-way communications Sensors enabling rapid diagnosis and corrections Dispatched distributed generation (PHEVs, wind, solar) Energy storage In-home energy controls Automated home energy use Slide 10 10 Smart House Plug-in hybrid electric cars Added green power sources Smart thermostats, appliances and in-home control devices Real-time and green pricing Signals High-speed, networked connections Customer interaction with utility Slide 11 11 We will need to collect, store, analyze and act on information How we might use PI: Commercial Operation Virtual Power Plant Substation Condition Based Analysis Distribution System Status and Control Customer Demand Response/Distributed Generation Slide 12 12 Learn more xcelenergy.com/smartgrid