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Communication in Substations: IEC61850 1.3 : COMMUNICATION

Communication in Substations: IEC61850 1.3 : COMMUNICATION. Sudhakar RAMPURKAR / AnshumanBHALLA 26th & 27th October 2009. Communication in Substations. Centralised monitoring and control. With numerical relays (IEDs) substation automation has become more popular and easy to install.

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Communication in Substations: IEC61850 1.3 : COMMUNICATION

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  1. Communication in Substations:IEC618501.3 : COMMUNICATION Sudhakar RAMPURKAR / AnshumanBHALLA 26th & 27th October 2009

  2. Communication in Substations • Centralised monitoring and control. • With numerical relays (IEDs) substation automation has become more popular and easy to install. • Reduced hardwiring – saving time and effort on commissioning and maintenance.

  3. Communication in Substations SUBSTATION COMMUNICATION Proprietary Open Physical link Protocol RS232 - copper Courier RS485 - copper SPA Ethernet - copper Profibus . . . Ethernet – optic MODBUS DNP3 IEC 60870

  4. The Solution: IEC 61850 • High engineering costs • Each protocol had its own structure of representing data (approx. US $ 28 billion spent on application integration in 1998 – Forrester 1999) • Many protocols • Inter-operability was an issue • Different levels of functionalities • Use of proprietary protocol • limited use of multi-user products • Each protocol supported different standards followed in Europe and North America

  5. Existing Protocol Limitation Example • In DNP3 (or other protocols), data context is lost in HMI. Thus engineering is a time consuming process.

  6. 7 Layer Open Systems Interconnection model What to go ? How to go ? Where to go ?

  7. Parallel running communication services at the Ethernet port Port B IEC 61850 Info – Report • Parallel running services: Optical module IEC 61850 Goose 1) Electrical Ethernet Module Data-highway: 100 MBit/s Ethernet IEC 61850 timesync.(SNTP2) Micom S1 Port B Web-Monitor

  8. Ethernet: A Data Highway for everything Transmission system 100 Mbit/s Ethernet … … • Bay devices to station controller • Inter-device communication • Remote setting of parameters • etc. DGSI One communication technology in the substation

  9. Communication Protocol comparison

  10. IEC61850 runs on Ethernet and TCP/IP Server PC • Interoperability – without Gateway 62,5μ or 50μ Fibre 100 Mbit/s Ethernet ring with ring management TP TP TP

  11. Protocol stack of IEC 61850 • Assignment of Functions, Services and Protocols

  12. Comparison of protocols/standards

  13. Communication stack

  14. Physical communication architecture • Ethernet network • Hubs • Switches • Redundancy • LAN topologies • Ring, star, etc.

  15. Network Terminology • Network : An interconnected group of nodes or stations linked by communication channels • Node : The interface point where one or more functional units are connected • LAN : Local area network (<5km) • WAN : Wide area network • IP : Internet Protocol

  16. Ethernet Basic Principle

  17. Ethernet Basic Principle

  18. Ethernet Basic Principle

  19. Ethernet Switch features • Substation environment! • Electro-magnetic compatibility • DC power supply with 20ms voltage dips, possibly redundant • Priority and VLAN (802.1q): • Virtual LANS • Management • Capability to detect a switch failure: SNMP or watch-dog • Redundancy management • No standard today for hard real time redundancy • Redundancy between switches (not applications)

  20. Base architecture

  21. Base architecture

  22. Base architecture

  23. Network components industrial substation hardened switch • Fulfill the EMC - requirement (ANSI, IEC, IEC61850 Part 3) • Supports priority tagging of Goose - messages

  24. Network components – Media converterfor opto-electricalconversion 10 MBit/s or 100 MBit/s Optical Ethernet Electrical Ethernet

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