1. Power Association ofNorthern California May 2009 Proprietary and Strictly Confidential CURRENT Group, LLC • 20420 Century Boulevard • Germantown, MD 20874 • +1.301.944.2700 • www.currentgroup.com

2. Why is Smart Grid Needed Now? • Growth of renewables and distributed generation • Dynamics that could have a huge effect on a utility's ability to deliver reliable power at a reasonable price • Distribution systems are inefficient – • Huge amounts of energy are wasted in line losses and an inefficient system (5%) • Aging infrastructure that will impact the reliability of power as well as inevitable rising costs • Generation shortfalls as demand growth well exceeds new generation • The need for infrastructure to support dispatchable demand response

3. Utility distribution systems have been operated as static “as built” systems With the growth of dynamic generation sources and the needs of the Smart Grid the distribution system will need to be dynamically managed. Dynamically controlling a complex distribution system will require new tools and systems. Utilities have generally deployed silo systems Smart Grid is about an enterprise platform. All departments sharing data and analytics. Actionable intelligence needs to be integrated between IT systems and within the business processes. Need higher speed enterprise communications and Smart Grid opens Pandora’s Box of Data Huge quantities of otherwise untapped data will be available. Up till now utilities focused on SCADA data. The ability to collect, store and provide data independent analytics will be required. System designed to address dynamic renewable generation Minimize costs and waste to allow for renewables What Does Smart Grid Mean? Distribution Management Enterprise Not Silo Systems Paradigm shift: Data and Communications Maximizing Renewables 3

4. Reduce energy and carbon by precise dynamic voltage control Many studies have shown a 1% drop in voltage results in a close .8% drop in energy demand Reduce losses (I2R) due to unbalanced feeders (3 phase) and circuits Reduce carbon, energy and costs by integrating load control functions (voltage, DR, DG, etc.) into a single efficient solution Reduce maintenance and capital costs, improve reliability, improve system capacity Supports CBM, dynamic rating, loss of life and replacement programs Solid Engineering Solutions are Available Voltage Control Load Balancing Advanced Load Control Real Time Asset Analysis 4

5. Smart Grid Solutions ANALYTICS & CONTROL SYSTEMS INFRASTRUCTURE & DATA MANAGEMENT COMMUNICATIONS & SENSING COMM / SENSING GATEWAYS BACKHAUL GATEWAYS OPENGRIDTMPLATFORM SYSTEM OPTIMIZATION DISTRIBUTION MANAGEMENT CUSTOMER ENERGY MANAGEMENT

6. Asset Properties • SCADA • OMS Device Status • Historical Load Data • Operational Data • “Smart Integration” • IEC 61968/61970 – • CIM • ICCP, OPC • OGC GML • NRECA MultiSpeak • ANSI C12.19 • Web Services (SOAP) Middleware Neutral MDMS OMS GIS Data Historian Billing/ Metering SCADA Meters Cap Banks RTUs IEDs Distribution Transformer Work & Asset Mgmt Corp Service ERP/BI PHEV Reclosers Tap Changers Sensors Switches Infrastructure and Data ManagementOpenGrid Architecture Overview GRAPHICAL USER INTERFACE SYSTEMOPTIMIZATION DISTRIBUTIONMANAGEMENT CUSTOMER ENERGY MANAGEMENT SERVICES MANAGEMENT INTERFACE ANALYTICS DEVICE DATA MANAGEMENT SYSTEM GEOSPATIAL DATA MODEL • Latency Parameters • “Beyond” SCADA Data • Equipment Status Updates • Sensor Inventory & Management • Measurement Data • Provisioning & Network Monitoring • Alarms & Triggers • “Smart Comms” • DNP3 • IEC 61850 • IP • SNMP Secure & Encrypted NETWORK MANAGEMENT SYSTEM Cellular DSL Fiber WiMax Cable BPL UTILITY ENTERPRISE SYSTEMS UTILITY INFRASTRUCTURE COMPONENTS

7. Phase Load Balancing Identification of load imbalance sections in feeders and recommendations to remedy imbalances for loading conditions and seasons Dynamic Voltage Optimization Voltage optimization through control of the substation Load Tap Changer Controllers based on real-time voltage measurements throughout the feeder System Optimization • Products that maximize the efficiency of the electricity flow from the utility to the customer. Volt/Var Control Power factor optimization through integrated control of capacitor banks • Benefits • Immediate savings by all rate payers • Deferred spend on generation through the lowering of overall power requirements by up to 5% • Reduced carbon emissions through the efficiency based reduction of overall power generation

8. SmartGridCityTM – Boulder, Colorado “The fundamental component for making the smart grid work will be a robust and dynamic communications network; providing the utility the ability for real-time, two-way communications throughout the grid and enabling interaction with each component from fuel source to end use” (Xcel Smart Grid White Paper) Collaborating to Build the Next Generation Utility 8 8

9. Smart Grid Operational Impact - Xcel • Using the CURRENT portfolio, Xcel has found numerous issues on its grid • Customers back-feeding the grid • Broken and loose neutrals • Transformer failures • Xcel is operationally changing their behavior • CEO of Xcel and President of PSCO pushed mobile version to field crews • Field crews liked it so much they have asked when more feeders will have this capability • Mental and fiscal shift from reactionary to preventative O&M • Area manager shifting budget from trouble shooting to preventative SmartGridCityTM Consortium 9

10. Helping Xcel Realize its Smart Grid City Objectives 10

11. Smart Grid Operational Impact - Oncor Examples of items detected by a Smart Grid: Smart Grid Solutions: • 24x7 real-time distribution network monitoring in use • Dispatching work crews to repair problems detected by CURRENT Smart GridTM • Underground fault detection installed • Successful distribution automation switching trial • 94% of the incidents detected avoided customer complaints • 54% of the incidents detected avoided outages “Issues are often resolved before consumers even realize that there was a problem” Oncor Press Release 11 11

12. Conclusion • True Smart grid projects can be proposed for stimulus money. No need to dust off old projects. • Smart Grid benefits both the consumer and utility • Consumers get lower cost, cleaner more reliable energy • Utilities get reduced operating costs, lower generation costs, and a more reliable and efficient distribution system.