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Utility Integration Bus Approach To System Migration

This document outlines Duquesne Light Co.'s innovative approach to Electric Management System (EMS) migration utilizing an Integration Bus (UIB). Highlighting the importance of modularity and real-time data access, the strategy integrates collaborating components over a Local Area Network (LAN) with SQL Server for data persistence. Key features include a standard publish-and-subscribe methodology, a single interface for both vendor and in-house applications, and efficient event notification systems. This migration is designed to minimize operator disruption while allowing for future scalability and adaptability in a changing technological landscape.

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Utility Integration Bus Approach To System Migration

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  1. Utility Integration Bus Approach To System Migration Duquesne Light Co.

  2. EMS Migration • Never Done • Choices at every step • Employ standards whenever possible

  3. Duquesne’s EMS Migration • First Cut • MMS as the Integration Bus • SQL Server for Data Persistence

  4. Duquesne’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

  5. Utility Integration Bus Approach • Need for the standard Bus • Tried DCOM • Tried SQL Update Queue

  6. 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

  7. Utility Integration Bus Approach • Publish and Subscribe • Provide single interface for vendor and in-house development • Thin Specification approach • Reduced Documentation

  8. Operator Event Notification • First Step in Migration • Minimize impact on Operators • Single point for Operator notification

  9. Operator Event Notification • New Events Published to the “Event Forwarder” • Operator Screens Subscribe to a category of events • Historian Function Subscribes to all events • Acknowledgment and clearing published to “Event Forwarder”

  10. DCOM Event Publishers Operator Event Screens DCOM Event Historian Event Diagram MTS DCOM Event Forwarder DCOM DCOM

  11. SCADA Function • Field Data Changes Published to SQL Database and SQL “Queue Table” • Operator One Lines Subscribe to Database for changes • Change detection and Limit Detection subscribe to “Queue Table” • On Change Detection Message Published to Event Notification System

  12. Operator SCADA Screens SCADA Diagram SQL Database Real-Time Data Base Change Queue UCA Publishers Status Change Publisher DCOM UCA Devices ( MMS Servers) Event System

  13. Need a Common Publish and Subscribe Bus(UIB) • Event Actions and SCADA Data Published to the Same Bus • Onelines and Operator Event Screens Subscribe to the Same Bus • Messages differentiated for quick routing • Security Redundancy and a Persistent Queue needed

  14. Event Publishers UCA Publishers Operator Event Screens Operator SCADA Screens UIB Diagram Real-Time Data Base Event Historian UIB

  15. Utility Involvement • Get involved in EPRI’s CCAPI • CIM is the Data Model • Bus is needed to integrate different Applications. • Standard Message Types, Security Roles and Redundancy Schemes

  16. UIB Immediate Benefits • Plug and Play applications • Integration of NERC-Tagging, Oasis, ISN, IIDC • Pennsylvania Customer Choice applications.

  17. UIB Can • Make integration of different Applications a reality • Define a scheme that can be replicated into the future • Build an extensible framework for the changing environment

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