Oncor Electric Delivery Intelligent Grid at Oncor Electric Delivery SWEDE Conference Alan Bern – SCADA / Automation Manager May 1, 2008

2 Smart Grid Is Not Just … Advanced Meter Reading (AMR) or Advanced Meter Infrastructure (AMi) Distribution Automation Substation Automation Advanced Distribution Applications Fault Identification and Location Volt – VAR Control

3 Smart Grid Is … Distribution Automation Intelligent Switching Capacitor Control Advanced Metering Remote Sensing Applications DMS/OMS/SCADA MWM/EMS/MDMS Communications Satellite, RF, Fiber, Cellular, BPL PLC, Pager, Microwave Fiber Substation Monitoring SCADA Control System Monitoring Voltage / Current Outage Fault Indication 3

4 Wireless Information Backhaul

5 CURRENT Smart Grid Services Network Architecture Low Voltage <10 Mbps Medium Voltage < 20 Mbps Fiber or Wireless Backhaul 1 Gbps (fiber), 1-3 Mbps (wireless) MAN DWDM Multi Gbps Carrier POP Utility Substation (Operational & Non- operational Data) Metro Area Fiber Network Managed In Home Network Private Intranet Utility Partner Real time control & verification All meter data Distribution Point Current and voltage sensing at the transformer CT Coupler & CT Bridge® Current Node CT Coupler & CT Backhaul-Point CT Coupler® & CT OTP™

6 BPL Transformer Monitoring Notification Report Details What happened here? 12 3 Secondary Neutral Failure

7 TRANSFORMER MONITORING SUMMARY

8 AMS Systems CURRENT NOC Direct Load Control Service To Home Electric Meter, (Svc Disconnect) Commercial Meter Distribution Substation Power Lines PLC - Substation Communication Equipment BPL Fiber BPL Backhaul Point BPL Trans Oncor PLC Server Oncor MDMS PLC – Two Way Automatic Communication System (TWACS) by DCSI BPL – CURRENT Billing BPL Data Flow PLC Data Flow Note: Illustrative, both technologies will not normally be installed on the same substation

9 Transmission Grid Management

10 Substation Automation Before After Relay Replacement Program Integrated Digital Fault Recorder Equipment Monitoring

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12 Distribution Automation – Smart Switches Manual Operation SCADA Operation Under frequency Event Over Voltage Event Under Voltage Event Reclose Scheme Current Analog Values Substation RTU

13 Distribution Capacitor Automation VAR Management  Master controlled system – monitors feeder VAR flow at substation  Allows tighter control over feeder power factor (reduces losses)  Allows better utility response to customer installed capacitors  Primarily uses 1-way paging (some 2-way w/cell modems)  3,410 automated controls installed

14 Power Factor Comparison

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16 DMS Functionality Overloads Fault Location Remote Control Switches Automated fault isolation Volt / VAR Control Load Flow Modeling Note: With field values

17 Create AMR Ping List Command Drop Down

18 All of this and MORE is Smart Grid at Oncor …