CIGRE Benefits of IEC61850
Transcript of 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
IEC61850 Network Architecture
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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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IEC61850 Network Architecture
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.
IEC61850 Network Architecture
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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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IEC61850 Demonstration
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IEC61850 Demonstration
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]