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g. GE Power Management. Utility Communication Architecture - UCA. g. GE Power Management. Utility Communication Architecture - UCA. Arose from the need for common communication across the utility enterprise Basic definition started in 1998

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Slide1 l.jpg

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GE Power Management

Utility Communication Architecture - UCA


Utility communication architecture uca l.jpg

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GE Power Management

Utility Communication Architecture - UCA

  • Arose from the need for common communication across the utility enterprise

  • Basic definition started in 1998

  • Defines a “suite” of protocols to address all utility communication requirements

  • Has recently focused on Substation Communications


7 layer uca model l.jpg

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7-Layer UCA Model


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Substation Integrated Protection, Control and Data AcquisitionPhase 1, Task 2Requiremenets Specification

ERPI - RP3599-01


Typical substation uca real time architecture l.jpg

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GE Power Management

Typical Substation UCA Real-Time Architecture


Participating uca vendors l.jpg

GE/ Multilin

Basler

Cooper

Beckwith

Tasnet

SEL

GE Harris

Siemens (Relays)

Siemens (HMI)

L&G

Doble

Dranetz/ BMI

Modicon/ Square D

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GE Power Management

Participating UCA Vendors


Utilities participating in uca l.jpg

American Electric Power (AEP)

Indianapolis Power & Light

Ontario Hydro

Northern States Power

Tampa Electric

ComEd

Cinergy

Baltimore Gas & Electric

GPU

Nuon

Enetergy

TVA

Duke

Boston Edison

Union Electric

Florida Power Corp.

Southern California Electric

Wisconsin Electric

ESKOM

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GE Power Management

Utilities Participating in UCA


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GE Power Management

Planned UCA Demo Sites

1. AEP - INEZ Project - March, 1998 (added this meeting)

2. TVA - Transmission - April, 1998

3. AEP - Distribution - May, 1998

4. GPU - Distribution - May, 1998

5. OH - Transmission - December, 1998

6. BE - Distribution - November, 1998

7. NSP - Transmission - November, 1998

8. Duke Power - December, 1998 (added this meeting)

9. SCE - December, 1998 (added this meeting)

10. AEP - Transmission - June, 1999


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GE Power Management

MMS Service Specifications

  • Defines a set of objects that can exist within a device.

  • Defines a set of communication services to access and manipulate those objects.

  • Defines the behaviour of the device to those communication services.


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MMS Objects

  • Domain

  • Program Invocation

  • Variable

  • Type (Variable)

  • Semaphore (2)

  • Operator Interface

  • Event Condition

  • Event Action

  • Event Enrollment

  • Journal

  • File


Simple type definition l.jpg

Type Classes:

BOOLEAN

BIT STRING

INTEGER

UNSIGNED (INT)

FLOAT (IEEE)

REAL (ISO)

VISIBLE STRING

OCTET STRING

GENERAL TIME (ISO)

BINARY TIME (MMS/C)

BCD

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GE Power Management

Simple Type Definition

  • A Sample Type definition consists of Class and Size

  • Although MMS Data has the form information built in (integer, string, boolean, etc.), only the Type definition has the size information needed to convert to local format.


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GE Power Management

Modelling Example

  • Two Real Objects:

    • Program Memory

    • Data Memory


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MMS Services

  • Get Object

  • Change Object

  • Determine Attributes

  • Create Object

  • Delete Object


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Named Variable Object

  • A named MMS object representing a “real” variable

  • Only the name is needed to access

  • Attributes:

    • Object Name (scope)

    • MMS Deletable (boolean)

    • Type Description

    • Access Method (Public, etc.)

    • Address (Public only)

  • Be careful about using addresses where the address can change from one run-time to the next


Domain l.jpg

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Domain

  • Represents a resource within the VMD

  • Domains are typically:

    • Program Memory

    • Recipe Memory

    • Data Memory, etc.

  • Domains may be pre-named


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GE Power Management

Domain Services

  • Upload:

  • Each upload sequence is assigned a unique ID Number to track multiple uploads in progress

  • Domain data is sent over the network in segments

  • InitiateDownloadSeq creates domain

    • If domain exists: must delete first

InitiateUploadSequence

UploadSegment

TerminateUploadSequence

  • Download:

InitiateDownloadSequence

DownloadSegment

TerminateDownloadSequence


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Unconfirmed Services

  • Unconfirmed services consist of only the request and indication service primitives

    • UnsolicitedStatus

    • InformationReport

    • EventNotification


Program invocations l.jpg

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Program Invocations

  • An execution thread consisting of one or more domains

  • A program invocationcan be started, stopped, etc.

  • A P.I. may be pre-named


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GE Power Management

Relay Data & Functions

Settings

Control

Present Values

Historical

Upload

Download

Change

Switch Group

Pswd Control

Bkr Open

Bkr Close

Enable Outputs

Disable Outputs

Present Values

Status

Pwr Quality

Fault Report

Oscillography

Demand Data


Common application service models casm l.jpg

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Common Application Service Models (CASM)

  • Generic Communications Services:

    • Data Access

    • Data (and exception) Reporting

    • Device Control, Tagging

    • Self Describing Devices

  • Detailed Mapping of Data Objects to MMS

  • Detailed Mapping of Generic Services to MMS Services


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Common Application Service Model

MMS Services Required


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Relationship of CASM and GOMSEE


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General Object Model

for Substation & Field Equipment (GOMSFE)

  • Object Modeling is a technique for identifying data elements in a device

  • Defines standard names, attributes and behaviours of the data elements

  • Allows for the re-use of names

  • Provides the foundation for the information needed for “self-decription”


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Protocol

A set of rules for operating a communication system

Areas addressed by rules:

  • Framing

  • Error Control

  • Sequence Control

  • Transparency

  • Line Control

  • Timeout Control

  • Startup Control

  • Special Cases


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Utility Communication Architecture - UCA


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