Download Substation Comms Intro PDF

TitleSubstation Comms Intro
TagsComputer Network Communications Protocols Osi Model Ethernet Network Topology
File Size1.1 MB
Total Pages23
Document Text Contents
Page 1

Substation Communications:
Introduction

Page 2

Communications : Why use it ?

Why would utilities/industry use communications to substation

equipment?

 To get power system data into a remote SCADA / DCS system

 To set IEDs, aid commissioning and extract data for analysis (“local

access”)

 Remote control of plant

Page 11

Ethernet Standard - 30/05/2012 - P 11

Bus Network/MultidropToken Ring Network TopologyStar Network Topology

Transmission Definitions : Shared Access

Page 12

Network An interconnected group of nodes or

stations linked by communication channels

Node The interface point where one or more
functional units are connected

LAN Local area network (<5km)

WAN Wide area network

Network topology Pattern of nodes and their interconnection

Gateway Equipment which makes data from a

separate subnetwork available to primary

network

Network Terminology

Page 22

Recent Developments

UCA2

 EPRI ( USA utilities ) project

 Not tied to any particular vendor

 Use of some existing standards (MMS protocol, Ethernet

medium)

IEC 61850

 Based on UCA 2 concepts

 International Standard issued 2004

 Edition 2 now partly issued

 Hundreds of substations commissioned

Page 23

…the ability of two or more IEDs or applications from the

same vendor, or from different vendors, to exchange

information and use that information for correct execution

of specified functions

…the goal of IEC 61850

Communications Interoperability is...

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