iec61850 primer
TRANSCRIPT
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IEC 61850 Primer - Communication Networks
and Systems In Substations
February 16, 2005
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61850 Scope
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Abstract Communications Service Interface ACSI
•Defines a set of Objects
•Defines a set of Services to manipulate and access those objects
•Defines a base set of data types for describing objects
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Anatomy of an IEC61850 Object Name
Physical Device(network address)
Logical Device(e.g. Relay1)
MMXU1 MMXU2
MXMX
AV
Logical Nodes
Functional Constraint
“MMXU2$MX$A” =Feeder #2 Current Measurements
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Logical node groupsL System LN (2)
P Protection (28)
R Protection related (10)
C Control (5)
G Generic (3)
I Interfacing and archiving (4)
A Automatic control (4)
M Metering and measurement (8)
S Sensor and monitoring (4)
X Switchgear (2)
T Instrument transformers (2)
Y Power transformers (4)
Z Further power system equipment (15)
Examples:
PDIF: Differential protection
RBRF: Breaker failure
XCBR: Circuit breaker
CSWI: Switch controller
MMXU: Measurement unit
YPTR: Power transformer
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Services Examples
• GetData – Read
• SetDataValues – Write
• GetDataDirectory – Read list of object names
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ACSI Services
EnableSelf
DescribingDevices
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IEC61850 Profiles
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IEC61850 DocumentsBasic principles Part 1
Glossary Part 2
General Requirements Part 3
System and project management Part 4
Communication requirements Part 5
Substation Automation System Configuration Part 6
Basic Communication Structure Part 7
Part 9Sampled Measured Values
Part 8
Conformance testing Part 10
Mapping to Ethernet
Mapping to MMS and Ethernet
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IEC61850 – Primary Parts
Part 6-1: Substation Configuration Language (SCL)
Part 7-2: Abstract Communications Service Interface (ACSI) and base types
Part 7-3: Common Data Classes (CDC)
Part 7-4: Logical Nodes
Part 8-1: Specific Communications Service Mappings (SCSM) - MMS & Ethernet
Part 9-2: SCSM - Sampled Values over Ethernet
Part 10-1: Conformance Testing
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IEC61850 Substation Architecture
MU = Merging Unit
MU
PT1 OpticalCT
MU
PT2 CT2
MU
OpticalPT
OpticalCT
Relay Relay Relay
MU Publishes V/I/Status Datasets
Relay(s) Subscribe to Datasets
I/O I/O I/O
Station Bus - 10/100/1000 MB Ethernet
Process Bus
.1/1/10GB
Ethernet
Clk1 Clk2
RemoteAccess
Network
MU = Merging Unit
MU
PT1 OpticalCT
MU
PT2 CT2
MU
OpticalPT
OpticalCT
IED IED IED
MU Publishes V/I/Status Datasets
Relay(s) Subscribe to Datasets
I/O I/O I/O
- 10/100/1000 MB Ethernet
.1/1/10GB
Ethernet
Clk1 Clk2
RemoteAccess
Network
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Sampled Measured Values
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. . .
Peer to Peer Communications
Functional Requirements
Bkr 1
Relay
TripBkr 2
Relay
Bkr N
Relay
Bkr 3
Relay
BFI
• Message delivery to multiple devices simultaneously
• Fast Delivery (< 4ms)
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IEC61850 Generic Object Oriented Substation Event - GOOSE• Device to multi-device communication – Local or Wide Area
•Bridgeable but Non-routable
•User-defined Dataset sent in an Ethernet Multicast message
•Message sent on change of state as well periodically to enable detection of device failure
• Reliability effected through message repeat
GOOSE Header:• Multicast Address
•Name
•Time Until Next GOOSE
•Etc.
User-Defined Dataset• Status Information
•Analog Values
•Data Quality
•Time
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SCL – Substation Configuration Language
• Description language for communication in electrical substations related to the IEDs
• XML based language that allows a formal description of
– Substation automation system and the switchyard and the relation between them
– IED configuration
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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.
CID: Configured IED Description. XML configuration for a specific IED.
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Benefits of IEC61850• High-level services enable self-describing
devices & automatic object discovery saving $$$$$ in configuration, setup and maintenance.
• Standardized naming conventions with power system context eliminates device dependencies and tag mapping saving $$$$ in config., setup, and maint.
• Standardized configuration file formats enables exchange of device configuration saving $$$$ in design, specification, config., setup, and maint.
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Benefits of IEC61850 - 2
• Higher performance multi-cast messaging for inter-relay communications enables functions not possible with hard wires and save $$$$ in wiring and maintenance.
• Multi-cast messaging enables sharing of transducer (CT/PT) signals saving $$$$ by reducing wiring and connection costs