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Overview of IEC 61850 and Benefits
Ralph Mackiewicz
SISCO, [email protected]
Marketing Subcommittee ChairUCA International Users Group
Agenda
• Brief Technical Overview of IEC 61850
• Benefits of IEC 61850
• UCA International Users Group– Users group for IEC 61850– Interoperability Demo
What is IEC 61850?• IEC61850 is a framework for substation
automation that addresses more of what is required for interoperability of intelligent electronic devices (IEDs) beyond just the protocol:
• Standardized object models and naming conventions• Standardized meaning of data• Standardized services and device behavior models• Self-describing devices• Common configuration language• Profiles for:
– Control/SCADA– Protection messaging– Transducers and I/O
Process Bus
IED3IED2IED1
VTCT
Station Bus
Process Bus
SubstationHost
SCADA
Process Bus Mappings (9-1, 9-2)•High-Speed Multicast of Sampled Measured Values (SMV) over Ethernet
•For Instrumentation & Transducers
Station Bus Protocols
IED3IED2IED1
VTCT
Station Bus
Process Bus
SubstationHost
SCADA
Station Bus Mappings (8-1)•Layered Mapping (TCP/IP) for Data Acquisition and Control
•High-Speed peer-to-peer messaging for protection
IEC 61850 Abstract Model
Application Process
SCSM 1 SCSM 2
Protocol Stack 1
Protocol Stack 2
ProtocolStack 3
CommonApplications
SpecificCommunication
Service Mappings(SCSM) or
“profile”
Abstract Communication
Service Interface (ACSI)
Abstract Device and Object Models
SCSM 1
Reference Models
• Reference models divide the problem according to abstract data and service models.
• Each layer of the model can be added to in the future without impacting other layers, providing a framework for future standardization
IEC61850 – Abstract Layered Standard
Device Object Models - IEC61850-7-3, 7-4
Device Model Data Objects Data Types Naming Conventions
TCP/IP Protocol Stack
Switched Ethernet
Mapping to MMS Protocol - IEC61850-8-1
Initiate InfoReport. GetNameList Write VariableList Journals
Abstract Communications Service Interface (ACSI)IEC61850-7-2
Associate Reporting Self-Description Control Data Set Logs
IEC 61850 Reference Model
• Isolation of application services and object models from underlying communications stack provides for ‘future proofing’
• New mappings can be developed to allow adoption of future technologies
Logical Device Model
IEC61850 Server Physical Device
LogicalNode
LogicalNode
Data Data Data Data
LogicalNode
LogicalNode
Data Data Data Data
Communications Driver
Legacy Device
LogicalDevice
LogicalDevice
Field Signals
. . . . . .
… … … …
1 to N Logical Devices
IEC61850 Clients:• SCADA/HMI• Historian• Bay Controls
Process Bus
Station Bus
Represents a power system function
Examples of Logical Nodes
Breaker
Current Transformer
Voltage Transformer
Breaker
Breaker
Anatomy of an IEC61850 Object Model
Physical Device(network address)
Logical Device(e.g. Relay1)
XCBR1 MMXU1
APos
Logical Nodes
Feeder #1 Current
Measurements
Data Objects
Measurements
Circuit Breaker
Circuit Breaker #1
Position
Brand Y
IEC61850 Object NamesBrand X
IOC Relay
PIOC MeasurementsMMXU1
ST DC
Mod Mod
DC MX
PhV PhV
Diff Relay
PDIF MeasurementsMMXU1
ST(status)
SG(settings)
Mod Mod
DC(description) MX
PhV PhV
MMXU1$MX$PhVIEC61850-8-1 Name
for phase-to-ground voltages
Substation Configuration LanguageSCL – IEC 61850-6-1
• XML to provide a formal description of the substation automation system, the IEDs within the substation and the switchyard
• SCL File Types:
• SSD: System Specification Description. – XML description of the entire system.
• SCD: Substation Configuration Description. – XML description of a single substation.
• ICD: IED Capability Description. – XML description of items supported by an IED (required).
• CID: Configured IED Description. – XML configuration for a specific IED.
SCL Applications• For users to specify IED requirements.
• For vendors to specify IED capabilities.
• Configure clients without IEDs.
• Extract IED configuration from power system design tools.
• Export IED configuration to power system design tools and other applications.
• Enable design tools from one vendor to work with another’s products
IEC 61850 Multicast Relay-Relay Network Based Protection
Relay 1
Breaker
Relay 2
Breaker
Relay 3
Breaker
Relay 4
Breaker
Station Bus Network
GOOSE -GSSE
GOOSE - Generic Object Oriented Substation Event (data sets)GSSE – Generic Substation Status Event (status only)
9-2 Process Bus
IEC61850 Process Bus
Merging Unit (MU)A/D A/D Input
Voltagesand
currents
BreakerStatus
Ethernet
BayController
ProtectionRelay
FaultRecorder
RTU
Ethernet Ethernet Ethernet Ethernet
Benefits of IEC 61850
IEC61850 is Unique• Not a recast serial RTU protocol and does not
replace RTU protocols bandwidth limited apps.
• Designed specifically for LANs to uniquely lower the cost to install, configure, and maintain substation devices.
• Object-oriented with a broader scope :• Supports standardized device models using names instead
of register numbers and indexes.• Abstract services with multiple protocol profiles.• Standardized configuration language (SCL).• Support for functions difficult to implement otherwise.• Conformance testing requirements defined
The benefits of IEC 61850 include lower…
• installation and maintenance costs with self-describing devices that reduce manual configuration.
• wiring costs enabling more advanced protection capabilities via the use of direct exchange of data between devices over existing station bus.
• communication infrastructure costs using readily available TCP/IP and Ethernet technology.
• engineering and commissioning effort with standardized models and naming conventions that eliminates manual mapping of I/O signals to power system variables.
• cost to configure and deploy devices with standardized device configuration files.
• sensor and wiring costs via a high speed process bus that enables sharing of instrumentation signals between devices.
The benefits of IEC 61850 include lower…
Legacy Protocol MappingProtocol objects must be manually mapped to
power system functions for each different device, application, and vendor.
Power System Functions
Phase A Voltage
Phase B Voltage
Phase C Voltage
Local/Remote Status
Breaker Position
Blocked Open
Activate Phase A
Activate Phase B
Activate Phase C
Legacy Device
R400040
R400041
R400042
R400043
R400044
R400045
R400046
R400047
R400048
R400049
R40004A
R40004B
Measurements
Controls
Protection
Brand Y
IEC61850 View of Devices
Brand X
MMXU1$MX$PhVIEC61850-8-1 Name
for phase to ground voltage
IOC Relay
PIOC MeasurementsMMXU1
ST DC
Mod Mod
DC MX
PhV PhV
Diff Relay
PDIF MeasurementsMMXU1
ST DC
Mod Mod
DC MX
PhV PhV
IEC 61850 Object MappingNO MANUAL MAPPING NEEDED
IEC61850 objects already portray the power system context.
IEC61850 Device
MX.A.PhsA.cVal.mag.f
MX.A.PhsB.cVal.mag.f
MX.A.PhsC.cVal.mag.f
ST.Loc.stVal
ST.Pos.stVal
ST.BlkOpn.stVal
ST.Op.phsA
ST.Op.phsB
ST.Op.phsC
LD
MMXU1
XCBR1
PIOC1
What is involved in migrating to IEC 61850?
• IEC 61850 can co-exist with protocols in a system, even running on the same network.
• IEC61850 devices and clients are currently available for substation applications.
• IEC 61850 gateways and data concentrators can be used to migrate existing systems and devices.
Where Can You Get Help?
http://sharepoint.ucausersgroup.org
UCAIug Mission
• Advancing Interoperability for the Utility Enterprise via support for international standards:
• Educational Activities• Help Desk• Improvement Process for International Standards• Testing and Certification• Promotional Activities
Broad Technical Focus
• Utility enterprises are complex and cross many functional boundaries
• Promoting interoperability in the utility enterprise requires a similarly broad focus
• UCAIUG uniquely offers members an organization to promote standardization across several functional areas
UCAIug – Technical Focus• Communications
• IEC 61850 – Substation Automation• IEC 61850 based extensions for wind, hydro, distributed
generation, etc.
• Application Integration• Common Information Model (CIM) IEC 61970 and IEC 61968• Generic Interface Definition (GID) IEC 61970
• Metering and Demand Response• OpenAMI – Information/data models, reference designs and
interoperability guidelines based on IntelliGrid and IEC standards.
ONE MEMBERSHIP
Bottom-Line Benefits• Test and certification activities that lower costs for
users• Provide input to international standards activities
at no additional cost and no travel• Members only access to:
– Resolution of technical issues related to standards– Industry experts via a global help desk– Technical documents and best practices from existing
users– On-line discussion forums
• Discounts on paid seminars and exhibitions
Demo in Booth #1164
14 UCAIug members are displaying IEC 61850 products interoperating on a common network in booth #1164
– Stop by and see it work for yourself– Ask questions…get answers
Thank You
Ralph MackiewiczSISCO, Inc.
6605 19 1/2 Mile RoadSterling Heights, MI 48314 USA
Tel: +1-586-254-0020Fax: +1-586-254-0053
E-Mail: [email protected]
