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NERC IDC Interchange Distribution Calculator System Overview June 1999

Open Access Technology International. NERC IDC Interchange Distribution Calculator System Overview June 1999. Contents. Transaction Management System (TMS) Transaction Information system (TIS) OASIS Phase II Management of Grid Congestion (NERC IDC) IDC Architecture IDC applications

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NERC IDC Interchange Distribution Calculator System Overview June 1999

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  1. Open Access Technology International NERC IDC Interchange Distribution Calculator SystemOverviewJune 1999

  2. Contents • Transaction Management System (TMS) • Transaction Information system (TIS) • OASIS Phase II • Management of Grid Congestion (NERC IDC) • IDC Architecture • IDC applications • IDC Maintenance & operation • IDC Security • Conclusions • Questions

  3. TMS Background A reliable and secure nationwide information system which provides: • Electronic exchange of transactions and scheduling data (TIS) • Seamless transmission reservation (OASIS II) • Management of grid congestion (IDC)

  4. Transaction Information System (TIS) • Electronic exchange of transaction information • energy profile • loss accounting • transmission reservation • NERC initiative to be operational by June 17, 1999

  5. TIS Background • Specification released by NERC in early December 1998 • Prepared by NERC TIS working group (TISWG) • Constrained Path Method (CPM) for curtailment • TIS 1.4 is intended to support hourly tags

  6. TIS Benefits • Ensure electronic transfer of tagging information • Create more efficient tagging mechanism • Improve usefulness of tags with uniformity and better quality • Assure accuracy and uniqueness of tags

  7. Business Process Source TIS 1.3 Document p. 7

  8. TIS Services • Tag agent service • Responsibility of PSEs • Responsible for creation of tag • Tag authority service • Responsibility of CAs • “Traffic cop” for all tag interactions • Forward tags to IDC • Tag approval service • Responsibility of CAs and TPs • Sends approval or denial to authority service

  9. Interface Protocols • Standard interfaces defined for sending and receiving data between various entities • Tis 1.4 services communicate using TMP (built on top of TCP/IP, HTTP) • Tag transfer via e-mail is no longer supported • Data model based on CSV 1.1 • Error codes defined

  10. TMP Messages AGENT AUTHORITY Assess APPROVAL Submit Cancel Cancel Update Notify Notify Status Dstatus Status Implement Forwarding

  11. OASIS Phase II • Provides for seamless transmission reservation nationwide • Streamline Scheduling and Transmission Reservation • Future activity

  12. Management of Grid Congestion • Proposal Initiated by NERC for the Eastern Interconnection • NERC IDC was Awarded to Alliance of OATI & Perot Systems in April 1999 • Scheduled for Operation by June 24, 1999 • IDC will be Delivered by the Alliance as a Service

  13. NERC IDC • OATI Designs and Develops the System • OATI Houses and Maintains the System • Perot Systems Provides First Line of Customer Support, Project Management and Documentation

  14. IDC Data Flow

  15. IDC Architecure • Client /Server Architecture • Server Hardware/Software • Intel based hardware • NT Operating system • Client Hardware/Software • Any available hardware • Any Operating system • Inter-application communications and messaging • MS Message Queue • MS COM/DCOM

  16. Server Hardware

  17. Network Configuration • Public Internet Access • Private Internet Access (NERCNet)

  18. Communication Infrastructure

  19. IDC Software • Server IDC Software • Applications • Database • User Interface • Client IDC Software • Internet Browser

  20. IDC Applications • NERC interchange distribution calculator • On-line TDF calculations • Transaction impact analysis • Transmission-line Loading Relief (TLR) and Transaction Halt • Market Re-Dispatch initiative

  21. IDC Database • Based on Third party RDBMS • MS SQL Server 7 • Tag Database • IDC Database • Historical Archival Database

  22. IDC User Interface • Browser Based Technology • HTML • JAVAScript • Supports Mainstream Browsers • MS IE • Netscape

  23. IDC User Interface • Security Coordinator Displays • TDF Viewers (PTDFs, OTDFs, LODFs) • Transaction Viewer • Impact Calculation Viewer • TLR Result Viewer • Next Hour Coordination (Halt) viewer • Execution Displays • Input Displays • Alarming and notification facility

  24. User Interface • Market Re-dispatch • Flowgate real time displays • Generator Shift Factors (GSF) • Summary of TLR results (Active and last 7 days) • NERC TLR Public Access • TLR Results • PTDF/OTDF

  25. External Interfaces • Interface to ISN via MAIN • Receive real time flowgate data • Access at 5-minutes interval • Interface to iIDC • Tags transferred every 5 minutes • NERC Interface via FTP • Public data (PTDFs/OTDFs/LODFs) (Hourly)

  26. Redundance/Failover/Recovery • Redundant Application Servers • Redundant Web Servers • Redundant Database Servers • Redundant Component in each server (RAID disks, network cards, power supplies) • Automatic Failover • Each pair of servers configured as backup for the other • Redundant Internet Connections

  27. Data/Software Backups • Daily backups of transactions and network changes • Daily tape backup of Software changes • database/ schema changes • UI template changes • IDC Applications changes

  28. System Sizing • Control Areas 250 • Transactions per-hour 3000 • Flowgates 2000 • NO. of Buses 50,000 • NO. of Branches 80,000 • NO. of Phase Shifters 100 • NO. of SCs 17

  29. Performance/Response Time • 1 TLR or Halt Response 10 secs • 3 Simultaneous TLR 20 secs • 5 Simultaneous TDF views 15 secs • SCs notification in 30 secs • TDF updates 1/hour • Min. System Availability 98.5%

  30. Maintenance and Operation • Help Desk • One Call Reporting for operational problems on a 7x24 basis • Manned Staff 12-hours/weekday plus Saturday • Scheduled 2-level on-call staff during all hours • Guaranteed Response Time Performance • User Registration

  31. Security • Software Security • Password protection • Compartmentalization • User Type access • Security Token • Monitored logins by Administrator • Private Network (NERCNet) for SCs • Secured Tech Area at OATI Data Center • Restricted Access to Servers

  32. Project Management • Communications and Reporting • Issue Management • Change Order Process

  33. Conclusions • TMS provides seamless integration of: • Tagging/scheduling • Transmission reservation • Congestion management • Provides the foundation for efficient and reliable grid operation into next millennium

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