IEC 61850 Primer Communication Networks and Systems In

IEC 61850 Primer Communication Networks and Systems In Substations February 16, 2005 GE Multilin Copyright

61850 Scope GE Multilin Copyright 2 February 16, 2005

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 GE Multilin Copyright 3 February 16, 2005

Anatomy of an IEC 61850 Object Name V A Functional Constraint MX MX Logical Nodes MMXU 1 MMXU 2 Logical Device (e. g. Relay 1) Physical Device (network address) “MMXU 2$MX$A” = Feeder #2 Current Measurements GE Multilin Copyright 4 February 16, 2005

Logical node groups L System LN (2) P Protection (28) R Protection related (10) C Control (5) G Generic (3) I Interfacing and archiving (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) A Automatic control (4) Examples: PDIF: Differential protection CSWI: Switch controller RBRF: Breaker failure MMXU: Measurement unit XCBR: Circuit breaker YPTR: Power transformer GE Multilin Copyright 5 February 16, 2005

Services Examples • Get. Data – Read • Set. Data. Values – Write • Get. Data. Directory – Read list of object names GE Multilin Copyright 6 February 16, 2005

ACSI Services Enable Self Describing Devices GE Multilin Copyright 7 February 16, 2005

IEC 61850 Profiles GE Multilin Copyright 8 February 16, 2005

IEC 61850 Documents Part 8 Basic 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 Mapping to MMS and Ethernet Sampled Measured Values Part 9 Mapping to Ethernet Conformance testing GE Multilin Copyright Part 10 9 February 16, 2005

IEC 61850 – 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 GE Multilin Copyright 10 February 16, 2005

IEC 61850 Substation Architecture Station Bus- 10/1000 MB Ethernet Relay(s) Subscribe to Datasets Relay IED Process Bus. 1/1/10 GB Ethernet MU Publishes V/I/Status Datasets Clk 1 Relay IED MU MU PT 1 I/O Optical PT 2 I/O CT 2 CT MU = Merging Unit GE Multilin Copyright Remote Access Network MU Clk 2 Optical I/O Optical PT CT 11 February 16, 2005

Sampled Measured Values GE Multilin Copyright 12 February 16, 2005

Peer to Peer Communications Functional Requirements Relay Bkr 1 Relay Bkr 2 Relay Bkr 3 Trip . . . Bkr N BFI • Message delivery to multiple devices simultaneously • Fast Delivery (< 4 ms) GE Multilin Copyright 13 February 16, 2005

IEC 61850 Generic Object Oriented Substation Event - GOOSE • Device to multi-device communication – Local or Wide Area GOOSE Header: • Multicast Address • Bridgeable but Non-routable • Name • User-defined Dataset sent in an Ethernet Multicast message • Etc. • Message sent on change of state as well periodically to enable detection of device failure • Reliability effected through message repeat • Time Until Next GOOSE User-Defined Dataset • Status Information • Analog Values • Data Quality • Time GE Multilin Copyright 14 February 16, 2005

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 GE Multilin Copyright 15 February 16, 2005

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. GE Multilin Copyright 16 February 16, 2005

Benefits of IEC 61850 • 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. GE Multilin Copyright 17 February 16, 2005

Benefits of IEC 61850 - 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 GE Multilin Copyright 18 February 16, 2005