CIGRE Benefits of IEC61850

7/28/2019 CIGRE Benefits of IEC61850

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Benefits of IEC61850Networking

Ralph Mackiewicz, SISCO Inc.

Marketing Committee Chair

UCA International Users Group

1 September 2004


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Objective

To provide a framework for

substation engineers to identify

the benefits of using IEC61850

technology for substation

automation (SA) projects.


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Keys to Successful Justification

Identify all the benefits (obvious).

Identify ALL the costs: Equipment

Installation Engineering

Commissioning

Utilization Costs

Impact on External Systems Costs to Change/Migrate in Future

Intangibles (new capability)


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Identifying ALL Costs

Requires a complete view of cost.

You cant justify an IEC61850 device by

examining only the price of the device.

- OR -

The benefit of an IEC61850 device isnot in the price of the relay.


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Identifying ALL Costs

Requires a longer time frame.

It is hard to justify any system by

examining only the purchase price.

- OR -

Benefits are received as systems areused, not when they are purchased.


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IEC61850 is Unique

Not a recast serial RTU protocol

Designed specifically for LANs to lower life

cycle cost to use a device: Cost to install, configure, and maintain

Real object-oriented approach for SA: Supports standardized device models using names

instead of custom object numbers and indexes.

Standardized configuration language (SCL).

Feature rich with support for functions difficult to

implement otherwise.


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Ground Rules

Qualitative analysis based on

comparison of legacy approaches

versus IEC61850 approach

Simplified Examples Shown.


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Legacy Substation

Network Architecture

IED IED IED

Driver 1 Driver 2 Driver 3

Application 1 Application 2

Tag Data Base

IED IED

Gateway/RTU

?

ExternalApplications


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Legacy Substation

Architecture Specialized point to point links to IEDs.

Applications must deal with numerous:

Protocols Data Formats Data Addressing

Protocols used have limited capabilities.

Difficult or no access point for other apps.

Comm. path must be reconfigured whennew devices or applications are added.


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IEC61850 Network Architecture

Network Hub

IED IED IEDGateway

IED IED IED

Legacy Devices

Substation Applications


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Data from IEDs available to allapplications via network.

Comm path unaffected when adding

devices or applications. Standard net. gear provides high perf. &

flexibility with environmental protection.

Applications and IEDs share common: Protocols Data Format and Context Data Addressing/naming Conventions Configuration Language



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Legacy SCADA View of Data

SCADA Tag Data Base

Flat set

of tags

Applications

Applications Access Data by Tag


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Legacy SCADA Data Access

SCADA

The voltage is here.

Its intuitive!?


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Legacy SCADA View of Data

Proprietary tag formats. Arcane addressing:

Driver Wire

Rack Device Register/Index # Network

Manually entered.

Manually verified. Applications tied to tag or free form alias.

Any tag conventions are proprietary.


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Anatomy of an IEC61850 Object Model

Physical Device(network address)

Logical Device

(e.g. Relay1)

MMXU1 MMXU2

APhV

Logical Nodes

Feeder #2 CurrentMeasurements

In Relay1

Data Objects


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Brand Y

IEC61850 View of Devices

Brand XIOC Relay

PIOCMeasurements

MMXU1

ST DC

Mod Mod

DC MX

PhV PhV

Diff Relay

PDIFMeasurements

MMXU1

ST DC

Mod Mod

DC MX

PhV PhV

MMXU1$MX$PhV

IEC61850-8-1 Name


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IEC61850 View of Devices

Only network addressing requires configuration inthe remote client.

Point names portray the meaning and hierarchy of

the data.

Point names can be retrieved from the deviceautomatically without manual intervention.

All devices share a common naming convention.

Device configurations can be exchanged usingIEC61850-6-1 (SCL) files


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Benefits

Reduced configuration costs from common

naming and automatic point configuration

and retrieval. Equipment migrations occur with minimal

impact on applications.

Application changes have minimal effect

on devices, network or other applications.


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Justification

Description Legacy Network ImpactEquipment

Purchase$ $$ -

Installation $ $ 0

Configuration $$$ $ +

EquipmentMigration

$$$ $ +

ApplicationAdditions

$$$ $ +


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Relay to Relay

Applications

a.k.a. Peer-to-Peer messaging


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Legacy Architecture

Relay 1Breaker Relay 3 Breaker

Relay 2

Breaker

Relay 4

Breaker

1

5

4

2

3

6

Hardwired signals for

relay to relay links


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Requires N*(N-1)/2 links for N relays.

Requires filtering on links to prevent

false trips.

Reprogramming can require rewiring.

Dont know if links are working until

you use them.

Legacy Architecture


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Relay 1

Breaker

Relay 2

Breaker

Relay 3

Breaker

Relay 4

Breaker

Network Hub

GOOSE -

GSSE

GOOSE - Generic Object Oriented Substation Event (data sets)

GSSEGeneric Substation Status Event (status)


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Relays share a common network makingsophisticated protection schemes possible.

Number of links for N relays is N andshared with SCADA.

Relays send their status to all other relaysat once using GOOSE.

Status exchanged continuously.

High performance.



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Benefits

Reduction of wiring costs

More flexible programming is independent

of wiring Reliability: Link status known before use.

New capabilities not cost-effective with

hardwired systems.

Higher performance with more data.


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Hardwired Performance

Signal

TimeRelayEnergizesContact

ContactsClose

InputThresholdReached

8-20ms


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Network Performance

Signal

TimeRelaySends

Data to I/F

RelayReceives

Data from I/F

< 4 ms

Network accessand collision

resolution

Using GSSE

over Ethernet


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Improved Performance

Network access with collisions

resolves very fast.

Data is transmitted multiple times toavoid missing data.

Digital error checking instead of

analog filtering.


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Justification

Description Legacy Network ImpactEquipmentPurchase

$ $$ -

Installation

$$ $ +Configuration $ $ 0

Protectionchanges

$$$ $ +

Flexibility $$$ $ +


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Conclusion

IEC61850 substation architecturesprovide significant benefits to users.

Key intangible: flexibility toaccomplish new objectives that aretoo costly (or not possible) withlegacy technology.

Justification is challenging butrealistic.


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Overview:CIGRE Demonstration

of IEC61850Stand 48

Exhibition Hall


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IEC61850 Demonstration

The UCA International Users Group is

sponsoring a demonstration of IEC61850

technology at Stand 48 in the exhibition hall.

13 Companies showing IEC61850 products.

Technical and product experts available toanswer questions and provide hands-on

demonstrations.


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Please come and visit us at Stand 48.

Learn about the benefits of joining theUCA International Users Group.

Learn about IEC61850.

All are welcome.


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Thank You

Ralph Mackiewicz

SISCO, Inc.6605 19 Mile Road

Sterling Heights, MI 48314 USA

Tel: +586-254-0020Fax: +586-254-0053

E-Mail: [email protected]

Documents

CIGRE Benefits of IEC61850