1. NEMMCO Bryan Connell Terry Day

2. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 2 NEMMCO was established in May 1996 to implement, administer and operate the wholesale NEM, continually improve its efficiency, and manage the security of the power system NEMMCO operates on a self funding “Not for Profit” basis In geographic terms, the NEM is the worlds longest transmission network, stretching from Cairns in northern Queensland to Hobart in Tasmania and Port Lincoln in South Australia. Approximately 4,600kilometres. Operates at 500kV, 330kV, 275kV, 220kV, 132kV, 110kV and 66kV 200+ generating units ranging from 18MW to 700MW Approximately 7.7million customers Maximum demand of approximately 30,000MW Annual energy of 160,000GWh worth $8 billion. Split into 6 interconnected regions with single price per region. Overview

3. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 3 Electricity Market Regions Victoria 9062 MW (8400MW) Snowy 0MW 3000 MW New South Wales 13292 MW (12370MW) Queensland 8344 MW (9965MW) S Australia 2916 MW (3200MW) 750 MW -1078 MW QNI 180 MW -180 MW Directlink 480 MW -300 MW V-SA 220 MW -220 MW Murraylink -1900 MW 1100 MW V-SN -1100 MW 3000 MW Snowy1 Installed capacity = 40000 MW Maximum demand = 31500 MW Tasmania 1666 MW (2500MW) -480 MW 630MW Basslink

4. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 4 Market Types Wholesale co-optimized Energy market –5 minute Dispatch with ½ hour pricing & settlement Frequency Control Ancillary Services (FCAS) –8 separate markets Fast Raise & Lower (6 sec) Slow Raise & Lower (60 sec) Delayed Raise & Lower (5 min) Regulation Raise & Lower Network Control Ancillary Services (FCAS) –Contracted Services Voltage Control System Restart Network Loading Control Full Retail Competition - MSATS

5. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 5 National Dispatch Security Centre’s Located in Sydney & Brisbane Co-primary / virtual control room NDSCs rather than traditional primary/disaster recovery sites 5 shift staff split between the 2 NDSC’s working 7x2 rotation (12 hour) shifts –2 network coordinators at each NDSC 1 MW dispatch, 1 voltage var dispatch, 2 power system security divided geographically –1 shift manager at one of the NDSCs

6. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 6 Control Room

7. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 7 NDSC Overview Virtual Control Room NDSC South SCADA / EMS TNSP NDSC North TNSP ………………………… …

8. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 8 Why PI? Existing historical data system was: –Great for event analysis eg playback on single line diagrams –Time consuming and difficult to use for data analysis, especially for data older than 2 months that had to be retrieved from tape Existing trending system was: –OK for presentation –Clunky to set up –Not integrated with the historical system and limited in the scope of available data

9. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 9 Why PI - continued $ Growing need for access to historical data for: –Control room operations –Power system event analysis and dispute resolution –Operations planning and forecasting –Power system performance analysis –Power system planning activities Alternate vendor historical system was: –Oracle based –High capital cost –Performance concerns –Offered little on the client side

10. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 10 PI Purchased Purchased in 2001 as a historian and trending tool because: –Good clients for user interface, and nice integration with existing office tools –Good performance for storing and retrieving data  modest server requirements –Efficient data storage  modest storage requirements –Low (ish) capital cost and low risk entry with easy expansion (started with 10,000 tags, now 30,000 tags) –Good support arrangements eg. 24 hour telephone support –Extensive user base –Easy company to deal with

11. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 11 PI Issues Lack of SCADA quality associated with tag values –Requires a second tag One major issue with exception processing combined with interpolated trends –Fixed by going to step.

12. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 12 PI Products used by NEMMCO ProcessBook Datalink / Excel ACE RtAlerts RtWebParts ActiveView

13. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 13 Interfaces in Use Habconnect –Data sourced from multiple Habitat databases –~ 19000 tags PIPerfmon –~ 200 devices, 8000 tags SNMP –~ 300 tags HTML –BOM web site, 100 tags

14. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 14 PI ACE Automatic Frequency Conformance Report Generation Interface Control SCADA Outage Monitoring & Reporting OSM Phase Angle Monitor

15. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 15 NEMMCO PI System MANEPIA1 Mansfield EMS AGC SNMP MANEPIA2 PIHC1 SCADA PIHC2 Main PIHC3 Tas MANEACE1 PItoPI Main PItoPI Tas RtAlerts HTMLPerfmonOSM MANEPIS1 MANEPIW2 RtWebParts NORPEPI1 DTS PI Server CAREPIS1 Norwest EMS AGC CAREPIA2 PIHC1 SCADA PIHC2 Main PIHC3 Tas CAREPIA1 SNMP NOREACE1 PItoPI Main PItoPI Tas RtAlerts PerfmonHTML NAS Backup NAS Backup TNSP’s Mail Server DTS Mail Server

16. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 16 ProcessBook – System Summary System Summary –Frequency –Demand –Generation –Reserve –Temperature –Interconnector flows –Prices –Many small trends

17. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 17 ProcessBook – Regional Summary Regional Summary –Demand –Generation –Interchange –Power Station totals

18. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 18 ProcessBook - AGC AGC Performance –Generator dispatch targets –AGC set point –Generator output

19. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 19 ProcessBook – Voltage Control Goes across three monitors

20. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 20 ProcessBook - Dispatch Past and projected interconnector flows –Yellow, 30 min projection –Magenta, 3 hr projection NEMMCO Custom Toolbar –Server selection –Time selection –Default server option

21. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 21 Processbook – Site Environment

22. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 22 Processbook – Server Performance

23. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 23 RtWebParts – EMS Overview

24. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 24 RtWebParts – EMS Process

25. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 25 RTWebParts PI Server Overview

26. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 26 RtWebparts – NEM Overview

27. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 27 Future – Proposed Upgrade to HA Mansfield EMS AGC MANEACE1 Primary IIS / RtAlerts MANEPIS1 Primary DTS1 PI Server CAREPIS1 Secondary Norwest EMS AGC NOREACE1 Secondary IIS / RtAlerts TNSP’s Mail Server’s DTS1 MANEPIA3 SNMP HTMLPerfmon PIHC1a SCADA PIHC2a Main PIHC3a Tas PI Server Collective ACE Collective DTS2 PI Server DTS2 Interface Collective MANEPIW2 NOREPIW2 MS Sharepoint Webfarm? MANEPIA4 SNMP HTMLPerfmon PIHC1b SCADA PIHC2b Main PIHC3b Tas NOREPIA3 SNMP HTMLPerfmon PIHC1a SCADA PIHC2a Main PIHC3a Tas Interface Collective NOREPIA4 SNMP HTML Perfmon PIHC1b SCADA PIHC2b Main PIHC3b Tas

28. Copyright © 2007 OSIsoft, Inc. Company Confidential. All rights reserved. 28