Utility Integration Bus Utility Integration Bus Approach To System Approach To System MigrationMigrationDuquesne Light Co.Duquesne Light Co.Duquesne Light Co.Duquesne Light Co.

EMS MigrationEMS Migration

• Never DoneNever Done

• Choices at every stepChoices at every step

• Employ standards whenever Employ standards whenever possiblepossible

Duquesne’s EMS MigrationDuquesne’s EMS Migration

• First CutFirst Cut

• MMS as the Integration BusMMS as the Integration Bus

• SQL Server for Data PersistenceSQL Server for Data Persistence

Duquesne’s EMS MigrationDuquesne’s EMS Migration

• Established access to all real-time data using MMS and the GOMSFE Basic RTU Model

• Separated EMS Functions into Collaborating Components on a Local Area Network

• Using the LAN, MMS, and DCOM and SQL Tables as the Integration Bus

Utility Integration Bus Approach

• Need for the standard Bus

• Tried DCOM

• Tried SQL Update Queue

Utility Integration Bus Approach

• Single Interface for All components

• 1 to 1 interfaces don’t work

• Redundant Data Providers and consumers

• Single queue for maintenance, persistence and security

Utility Integration Bus Approach

• Publish and Subscribe

• Provide single interface for vendor and in-house development

• Thin Specification approach

• Reduced Documentation

Operator Event Operator Event NotificationNotification

• First Step in Migration

• Minimize impact on Operators

• Single point for Operator notification

Operator Event Operator Event NotificationNotification

• New Events Published to the “Event New Events Published to the “Event Forwarder”Forwarder”

• Operator Screens Subscribe to a category Operator Screens Subscribe to a category of eventsof events

• Historian Function Subscribes to all eventsHistorian Function Subscribes to all events

• Acknowledgment and clearing published Acknowledgment and clearing published to “Event Forwarder”to “Event Forwarder”

Event DiagramEvent DiagramEvent HistorianEvent Historian

Event Forwarder

Event Forwarder DCOMDCOM

MTSMTS

Operator Event Screens

Operator Event Screens

DCOMDCOM

Event PublishersEvent Publishers

DCOMDCOM

DCOMDCOM

DCOMDCOM

SCADA FunctionSCADA Function

• Field Data Changes Published to SQL Field Data Changes Published to SQL Database and SQL “Queue Table” Database and SQL “Queue Table”

• Operator One Lines Subscribe to Database for Operator One Lines Subscribe to Database for changeschanges

• Change detection and Limit Detection Change detection and Limit Detection subscribe to “Queue Table”subscribe to “Queue Table”

• On Change Detection Message Published to On Change Detection Message Published to Event Notification SystemEvent Notification System

SCADA DiagramSCADA Diagram

UCA Publishers

UCA Publishers

SQL DatabaseSQL Database

StatusChange

Publisher

StatusChange

PublisherOperator SCADA

Screens

Operator SCADA Screens

Real-Time Data Base

Real-Time Data Base

Change QueueChange Queue

UCA Devices( MMS Servers)

UCA Devices( MMS Servers)

Event SystemEvent System

DCOMDCOM

Need a Common Publish Need a Common Publish and Subscribe Bus(UIB)and Subscribe Bus(UIB)

• Event Actions and SCADA Data Published Event Actions and SCADA Data Published to the Same Busto the Same Bus

• Onelines and Operator Event Screens Onelines and Operator Event Screens Subscribe to the Same BusSubscribe to the Same Bus

• Messages differentiated for quick routingMessages differentiated for quick routing

• Security Redundancy and a Persistent Security Redundancy and a Persistent Queue neededQueue needed

UIB DiagramUIB Diagram

Event PublishersEvent Publishers

Event HistorianEvent Historian

Operator Event Screens

Operator Event Screens

UIB

Operator SCADA Screens

Operator SCADA Screens

UCA Publishers

UCA Publishers

Real-TimeData Base

Real-TimeData Base

Utility InvolvementUtility Involvement

• Get involved in EPRI’s CCAPIGet involved in EPRI’s CCAPI

• CIM is the Data ModelCIM is the Data Model

• Bus is needed to integrate different Bus is needed to integrate different Applications.Applications.

• Standard Message Types, Security Standard Message Types, Security Roles and Redundancy SchemesRoles and Redundancy Schemes

UIB Immediate BenefitsUIB Immediate Benefits

• Plug and Play applicationsPlug and Play applications

• Integration of NERC-Tagging, Oasis, Integration of NERC-Tagging, Oasis, ISN, IIDCISN, IIDC

• Pennsylvania Customer Choice Pennsylvania Customer Choice applications.applications.

UIB CanUIB Can

• Make integration of different Make integration of different Applications a realityApplications a reality

• Define a scheme that can be Define a scheme that can be replicated into the futurereplicated into the future

• Build an extensible framework for Build an extensible framework for the changing environmentthe changing environment