Overview of IEC 61850 Khorasan Regional Electric Company

Overview of IEC 61850 Khorasan Regional Electric Company Ministry of Energy of Iran Presented By: Davood Mohammadi Souran November 8 th. 2012 davood_souran@yahoo. com

Agenda 1. Evolution of Protection and Control Systems 2. Overview of IEC 61850 Standard 3. Key Benefits of IEC 61850 2

Evolution of Protection and Control System 3

Typical Substation Diagram 4

Substation Network - Past 5

Conventional Wiring in Electrical Substation 6

Conventional Substation P & C System 7

Conventional Substation Control Panel 8

Substation Network - Present 9

Present Substation P & C System Still a lot of copper wiring ! 10

Substation Network - Future 11

The Future – Digital Switchyard 12

Modern Substation Automation HMI 13

20 KV Single Line Diagram Ashkhane 14

General Single Line Diagram Ashkhane 15

Overview of IEC 61850 Standard 16

Com EPRI prehen -Proj s ect U ive CA 2. 0 GOAL: One International Standard 104 , 3 -10 ce , 1 0 5 -1 perien 0 7 x 08 e 6 n C a IE pe Euro 17 IEC 61850

What is IEC 61850 ? Ø IEC 61850 is NOT just a communication protocol Ø It is a suite of multiple protocols Ø It is an application focused communication architecture Ø It is one of the key building blocks for the Smart Grid IEC 61850 standard defines complete communication architecture in Electrical Power System 18

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 MU MU PT 1 I/O Optical PT 2 I/O CT 2 CT MU = Merging Unit 19 Relay IED Remote Access Network MU Clk 2 Optical I/O Optical PT CT

Parts of IEC 61850 Standard 20

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 21

SCL – Substation Configuration Language IEC 61850 -6 -1 �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 �Communication parameters �Eases the integration process of devices from multiple vendors 22

SCL File Types �SSD: System Specification Description. XML description of the entire system. �SCD: Substation Configuration Description. substation. XML description of a single �ICD: IED Capability Description. XML description of items supported by an IED. �CID: Configured IED Description. XML configuration for a specific IED. 23

System Specification Description ( SSD ) Description the single line diagram and the substation automation functionaly using the associated logical nodes • Single line diagram connections • Logical nodes , Logical node type 24

IED Capability Description ( ICD ) • logical devices , logical node types • data sets • control blocks 25

System Configuration Description ( SCD ) • Single line diagram • Communication network • IED configurations • Binding information ( e. g. trip matrix ) 26

Configured IED Description ( CID ) • Created by the IED configuration tool from the. SCD file • Includes the device-specific configuration data • Use of the. CID file to configure the IED is optional 27

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ACSI Abstract Communications Service Interface Ø Abstract interface describing communications between a client and a remote server for: § real-time data access and retrieval, § device control, § event reporting and logging, § file transfer § Defines a set of Objects 29

ACSI Abstract Communications Service Interface Ø This part of IEC 61850 may also be applied to describe device models and functions for additional activities, such as: § substation to substation information exchange, § substation to control centre information exchange, § power plant to control centre information exchange, § information exchange for distributed generation, or § information exchange for metering. 30

Logical nodes 31

Logical Nodes �A named grouping of data and associated services that is logically related to some power system function. ddd. XCBR 1 Logical Node Instance # Logical Node Name per IEC 61850 -7 -4 (breaker) Optional Application Specific Prefix 32

IEC 61850 -7 -4 Logical Nodes Name 33 Axxx Cxxx Gxxx Ixxx Lxxx Mxxx Pxxx Rxxx Sxxx Txxx Xxxx Yxxx Zxxx Wxxx Oxxx Hxxx Nxxx Bxxx Fxxx Description Automatic Control (4). ATCC (tap changer), AVCO (volt. ctrl. ), etc. Supervisory Control (5). CILO (Interlocking), CSWI (switch ctrl), etc. Generic Functions (3). GGIO (generic I/O), etc. Interfacing/Archiving (4). IARC (archive), IHMI (HMI), etc. System Logical Nodes (2). LLN 0 (common), LPHD (Physical Device) Metering & Measurement (8). MMXU (meas. ), MMTR (meter. ), etc. Protection (28). PDIF, PIOC, PDIS, PTOV, PTOH, PTOC, etc. Protection Related (10). RREC (auto reclosing), RDRE (disturbance). . Sensors, Monitoring (4). SARC (archs), SPDC (partial discharge), etc. Instrument Transformer (2). TCTR (current), TVTR (voltage) Switchgear (2). XCBR (breaker), XCSW (switch) Power Transformer (4). YPTR (transformer), YPSH (shunt), etc. Other Equipment (15). ZCAP (cap ctrl), ZMOT (motor), etc. Wind (Set aside for other standards) Solar (Set aside for other standards) Hydropower (Set aside for other standards) Power Plant (Set aside for other standards) Battery (Set aside for other standards) Fuel Cells (Set aside for other standards)

Logical Node Description XCBR SPS 34 Data Name Common Data Class Mandatory/Optional Description

Single Point Status (SPS) CDC (e. g. loc) st. Val 35 Attribut e Name Typ e Functiona l Constrain Range of Values Mandator y/ Optional

Object Name Structure Relay 1/XCBR 1$ST$Loc$st. Val Attribute Data Functional Constraint Logical Node Logical Device 36

Mapping logical nodes, classes, and data concepts to the real world 37

Logical nodes 38

GOOSE messages �Time critical data eg. trip, block, interlock, etc. � Tripping of switchgear � Starting of disturbance recorder � Providing position indication for interlocking 39

GOOSE messages 40

GOOSE Usage for Interlocking & Tripping 41

IEC 61850 GOOSE �Device to multi-device communication �Fast transmission of substation events, blocking, permissive signals, etc. �Also transmission of analog values ( voltage, current, frequency, etc. ) �Event driven transmission sent on change of state �Interlocking �Indication 42

GOOSE Example – False Bus Differential 43

IEC 61850 Architecture 44

Relay to Relay Applications Peer to Peer messaging 45

Legacy Architecture 46

Legacy Architecture �Requires N*(N-1)/2 links for N relays. �Reprogramming can require rewiring. �Requires filtering on links to prevent false trips. 47

IEC 61850 Network Architecture 48

IEC 61850 Network Architecture �Relays share a common network making sophisticated protection schemes possible. �Number of links for N relays is N and shared with SCADA. �Relays send their status to all other relays at once using GOOSE. �Status exchanged continuously. �High performance. 49

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. 50

Hardwired Performance 51

Network Performance 52

Justification 53

Transducer Interfaces 54

Legacy Approach 55

Legacy Approach �Individually and redundantly wired to all devices needing the same signals: üCTs üPTs üStatus Inputs üOutputs �Each individual sensor must be calibrated 56 and maintained separately. �Incremental cost is exponential (signals x devices) �Result is minimization of I/O

IEC 61850 Approach 57

IEC 61850 -9 -2 Process Bus �Transducer and I/O signals are shared via a network. � Only one transducer or I/O point per signal. �Minimization of calibration and maintenance. �Incremental cost is linear (signals only) �Future: Integrated MU with digital fiber optic transducers 58

Justification 59

Benefits of IEC 61850 �High-level services enable self-describing devices & automatic object discovery saving $$$$$ in configuration, setup and maintenance. �Standardized naming conventions with power system context eliminates device dependencies and tag mapping saving $$$$ in config. , setup, and maintenance. �Standardized configuration file formats 60 enables exchange of device configuration saving $$$$ in design, specification, config. , setup, and maint.

Benefits of IEC 61850 �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 transducers and calibration costs. 61

Question? 62