IDEA Campus Conference February Electric Distribution Systems Development, Integration and Reliability. John Laetz & John Lindberg

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1 IDEA Campus Conference February 2009 Electric Distribution Systems Development, Integration and Reliability John Laetz & John Lindberg

2 SCADA Home Page

3 Manning Substation Transformers and GIS Equipment

4 Cameron Substation GIS Building

5 Mandate of EDS Distribute Electricity: Safely Reliably Economically

6 Value of Reliable Electricity Academic Facilities Hospital Budget: $710 Million/yr Reliable Electrical Support Residential Facilities Research Facilities $678 Million Grants & Contracts Athletics Budget: $61 Million / yr Support Facilities

7 UNC Health Care System - Chapel Hill State-of-the-art patient care Association with the UNC-Chapel Hill School of Medicine teaching mission 724-bed facility 32,000+ discharges & over 742,000 visits per year 2 million sq ft JCAHO guidelines for accreditation

8 Energy Services Campus Electric Distribution Suppliers Duke Energy -Peak Load to Date appx. 84MW Cogeneration Facility 33MVA 3 Substations 12.47KV 64 Miles Underground Circuit 5 Miles Overhead Circuit

9 5-YEAR RELIABILITY GOALS ( ) GOAL #1: INCREASE UNADJUSTED CUSTOMER ASAI RELIABILITY FROM % (141 MINUTES SAIDI) TO AT LEAST % (LESS THAN 60 MINUTES PER YEAR). GOAL #2: INCREASE ADJUSTED CUSTOMER ASAI RELIABILITY FROM % (40 MINUTES SAIDI) TO AT LEAST % (LESS THAN 20 MINUTES PER YEAR). Note: Unadjusted metrics account for all outage sources. Adjusted metrics remove Duke Energy outages. ASAI - Average Service Availability Index SAIDI - System Average Interruption Duration Index

10 Current Reliability Statistics (2008) Average Service Availability Index ASAI % (vs % ) System Average Interruption Duration Index SAIDI = 115 (vs. 60) Outage Min. Per Delivery Pt. Per Yr After Adjustment, Removing Supplier-Sourced Outages ASAI = % (vs %) SAIDI = 23 (vs. 20) Minutes Duke Energy = 148 Minutes Per Year (2007) Progress Energy = 94 Minutes Per Year

11 Reliability Progress - SAIDI SAIDI (avg. customer outage duration) 5-Year Goals to 2008 Initial end 2008 Unadjusted Adjusted Minutes

12 Year Outage Causes All Events Separated by Cause Major Causes by Year For 5 Years Total of 76 Events Other UNC-based, 1, 1% Tree Caused, 6, 8% Fuse Blown, 1, 1% Momentary-Initiated, 1, 1% Tree Caused Squirrel Caused Lightning, 3, 4% Contractor Error, 20, 26% 2006 Equipment Failure Contractor Error Switching Error, 4, 5% 2005 Squirrel Caused, 8, 11% Equipment Failure, 32, 43% Annual Avg Events/Year

13 Areas of Reliability Improvement Operational Improvements Design Updates Replacement of Old Infrastructure New Construction Knowledge System Improvements

14 Safety And Reliability In Operations Thermography Old Cable/Switch Replacement General Condition of Equipment

15 Safety And Reliability In Operations Arc-Flash PPE with Protective Relaying System Supervision Procedures Real-Time Communications Fault Indicators Documentation (cont.)

16 Reliability Through Design Underground Ductbanks, Co-Generation, Redundant Utility Feeds Restoration Time-Reduction Capabilities (More Later) Distribution Protection Planning

17 Concrete-Encased Ductbanks

18 Project Goals REPLACE UNDERSIZED CONDUCTORS ADD TAP LINE PROTECTION ON MAJOR CIRCUITS RECONFIGURE RADIAL CIRCUITS TO LOOP CIRCUITS ADD HIGH SPEED ES FOR CIRCUIT SECTIONALIZING UPGRADE EXISTING SCADA SYSTEM TO AN AUTOMATION SYSTEM INSTALL FIBER BACKBONE FOR SCADA, COMMUNICATION PROTECTION AND AUTOMATED METERING UPDATE SUPPORTING SOFTWARE SYSTEMS

19 6-WAY High-Speed Switch

20 REQUIRED CIRCUIT IMPROVEMENTS This is what we needed at a minimum when the project began. CIRCUIT BREAKER 1 ADD TAP LINE PROTECTION AT ADD TAP LINE PROTECTION AT 2 Radial Circuits 2 REPLACE UNDERSIZED CONDUCTOR EXISTING OPENING POINT ADD TAP LINE PROTECTION AT CIRCUIT BREAKER ADD TAP LINE PROTECTION AT ADD TAP LINE PROTECTION AT

21 CURRENT CIRCUIT PROTECTION CIRCUIT BREAKER CABLE OR SPLICE FAILURE FAILURE OF ANY CIRCUIT COMPONENT OPENING POINT CIRCUIT BREAKER

22 CURRENT CIRCUIT PROTECTION CIRCUIT BREAKER CABLE OR SPLICE FAILURE RESULT: ENTIRE CIRCUIT GOES OUT OPENING POINT CIRCUIT BREAKER

23 AUTOMATION RELATED IMPROVEMENTS HIGH SPEED LOOPS ADD AUTOMATED ADD AUTOMATED CIRCUIT BREAKER AUTOMATE ES CLOSE OPENING POINT CLOSE EXISTING OPENING POINT ADD AUTOMATED CIRCUIT BREAKER ADD AUTOMATED ADD AUTOMATED

24 AUTOMATION RELATED IMPROVEMENTS HIGH SPEED LOOPS ADD AUTOMATED ADD AUTOMATED CIRCUIT BREAKER FAILURE OF SAME CIRCUIT COMPONENT CABLE OR SPLICE FAILURE CLOSE EXISTING OPENING POINT ADD AUTOMATED CIRCUIT BREAKER ADD AUTOMATED ADD AUTOMATED

25 AUTOMATION RELATED IMPROVEMENTS HIGH SPEED LOOPS ADD AUTOMATED ADD AUTOMATED CIRCUIT BREAKER RESULT: FEW OR NO CUSTOMERS LOSE POWER OPEN CABLE OR SPLICE FAILURE OPEN CLOSE EXISTING OPENING POINT ADD AUTOMATED CIRCUIT BREAKER ADD AUTOMATED ADD AUTOMATED

26 AUTOMATION RELATED IMPROVEMENTS HIGH SPEED BACKUP CIRCUITS AUTOMATED AUTOMATED CIRCUIT BREAKER INSTALL HIGH SPEED TRANSFER FOR ENTIRE LOOP NORMALLY OPEN BACK-UP CIRCUIT FAST CLOSING AUTOMATED COORDINATED WITH OPENING THE NORMAL FEEDS CIRCUIT BREAKER AUTOMATED AUTOMATED CIRCUIT BREAKER DIFFERENT SUBSTATION

27 AUTOMATION RELATED IMPROVEMENTS HIGH SPEED BACKUP CIRCUITS AUTOMATED AUTOMATED CIRCUIT BREAKER OPEN INSTALL HIGH SPEED TRANSFER FOR ENTIRE LOOP CIRCUIT BREAKER OPEN AUTOMATED CLOSE FAST CLOSING AUTOMATED COORDINATED WITH OPENING THE NORMAL FEEDS AUTOMATED BACK-UP CIRCUIT CIRCUIT BREAKER DIFFERENT SUBSTATION

28 REQUIRED AUTOMATION CONTROL SYSTEM UPGRADES TO METERS AUTOMATION CONTROL SYSTEM TO AUTOMATED METER DATA SYSTEM ION ENTERPRISE CONTROL SYSTEM PATHWAYS: RELAY TO RELAY (MIRRORED BIT PROTOCOL) SCADA OVERSIGHT (SEL PROTOCOL) ENGINEERING ACCESS TO RELAYS AUTOMATION TO METERS (ION PROTOTCOL) TO METERS TO METERS

29 Knowledge Systems - Historical Wallmap Circuit One-Line Diagrams Manhole (Butterfly) Diagrams Other Transformer Specifications Material Lists Work Management Records

30 Wallmap

31 Circuit One-Line Diagram

32 Manhole Diagram

33 Knowledge Systems Improvement Objectives Database Oriented Searchable with Filters Reports and Presentation of Information Enterprise User Interfaces User Customized Interaction with Other Systems

34 Enterprise Systems at EDS Survalent SCADA with edna Data Historian ArcGIS with ArcFM MAXIMO (currently ver. 6.2) ION Enterprise Metering Automation Metering Database (UNC-developed)

35 Specialized Applications Electric System Modeling Advantica SynerGEE Relay Settings Management AcSELerator Fault Reporting AcSELerator Report Manager (formerly SEL 5040)

36 SCADA System Objectives Connect to Monitor and Control Relays at Breakers and Switches Monitor PQ Meters for Alarms Surveillance Cameras

37 Cameron One-Line

38 High-Speed Switch One-Line

39 SEL-451 Relay Control Panel

40 ArcGIS

41 Comprehensive One-Line Diagram from ArcGIS

42 Generalized Data Flow User Interface Enterprise Application Protocol Device Data

43 Application Interactivity User Interface 1 Enterprise Application 1 Protocol Device Data Data Interface User Interface 2 Enterprise Application 2

44 EDS Application Connections Substation Relays Analog Data Communications Interface OPC Interface ION Meter Data OPC Interface Substation Relays Control Data Survalent SCADA ION Enterprise edna Data Historian Substation Relays Status Data MultiSpeak Interface Energy Services Users Database Interface Manually Edited Utility Data ArcGIS / ArcFM Electric Distribution Users Energy Management (EMCS) Field Input MAXIMO Work Management MultiSpeak Interface Synergee Model

45 Where We Are Now SCADA In-service for 3 years Some HS switches on-line MultiSpeak interface installed but not fully configured ArcGIS / ArcFM MultiSpeak interface functional One-line diagrams (comprehensive and individual) Connectivity and Conduit-Manager working SynerGEE Model in development MultiSpeak interface in use-test

46 Summary Electric distribution customers at UNC already see higher reliability than the average Duke Energy customer, based on the metrics tracked. Continuous electric distribution improvements are being made in operations and design Linking of enterprise systems employing documentation/knowledge handling is contributing to these improvements