nerc idc interchange distribution calculator system overview june 1999

Open Access Technology International, Inc.

NERC IDC Interchange Distribution

Calculator System

Overview

June 1999

Open Access Technology International


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


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)

TMS Background


Electronic exchange of transaction information

energy profile loss accounting transmission reservation

NERC initiative to be operational by June 17, 1999

Transaction Information System (TIS)


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


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

TIS Benefits


Business Process

Source TIS 1.3 Document p. 7


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


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


TMP Messages

AGENT AUTHORITY APPROVAL

Forwarding

Submit

Cancel

Notify

Status

Assess

Cancel

Update

Notify

Implement

Dstatus Status


Provides for seamless transmission reservation nationwide

Streamline Scheduling and Transmission Reservation

Future activity

OASIS Phase II


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


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


IDC Data Flow

Flowgates

IDCExecutive

FactorsEngine

ImpactAnalysis

TLR

Halt

Curtail

Reload(2.0)

IslandingProcessor

TAG DB

IDCDB

SDX

IDC functions

WebServer

Tag Authority/SCs

TIS Lists

Internet

SC/NERC TP/CA PSE

NERCNet

SC/NERC TP/CA

iIDC


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


Server Hardware

ArchiveDatabase Server

IDC/TLR Server IDC/TLR Server

Training/TestServer

Web Server

IDCDatabase

Server

TagDatabase

Server

TMPServer

Development/TestServer

Web Server


Network Configuration

Public Internet Access Private Internet Access (NERCNet)


Communication Infrastructure

DNSServer

T1

FrameRelay

Upstream ISP

CSU/DSU Router

Hub

Firewall

Internet

Upstream ISPFrameRelay

T1


IDC Software

Server IDC Software Applications Database User Interface

Client IDC Software Internet Browser


NERC interchange distribution calculator

On-line TDF calculations Transaction impact analysis Transmission-line Loading Relief

(TLR) and Transaction Halt Market Re-Dispatch initiative

IDC Applications


IDC Database

Based on Third party RDBMS MS SQL Server 7

Tag Database IDC Database Historical Archival Database


IDC User Interface

Browser Based Technology HTML JAVAScript

Supports Mainstream Browsers MS IE Netscape


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


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


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)


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


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


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


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%


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


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


Project Management

Communications and Reporting Issue Management Change Order Process


Conclusions

TMS provides seamless integration of: Tagging/scheduling Transmission reservation Congestion management

Provides the foundation for efficient and reliable grid operation into next millennium

nerc idc interchange distribution calculator system overview june 1999

Documents