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Communication protocols

Communication protocols. Application Process. Network independent Interface. ACSI Abstract Comm. Service Interface. SCSM 1. SCSM 2. SCSM n. Specific Comm. Service Mapping. Specific Interface. AL 1. AL 2. AL n. Application Layer 7. Layer 1..6.

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Communication protocols

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  1. Communication protocols ApplicationProcess Network independent Interface ACSIAbstract Comm.Service Interface SCSM 1 SCSM 2 SCSM n Specific Comm. Service Mapping Specific Interface AL 1 AL 2 AL n Application Layer 7 Layer 1..6

  2. Peer to peer communication; time critical Client / Server communication reports req / rsp req / rsp GOOSE MessageSampled Values multicast Communication concepts Physical Device Physical Device ACSI Client ACSI Server Data Data Data • Applications of "peer-to-peer" communication • tripping of circuit breakers: short information that needs to be transmitted with a low probability of loss within a few milliseconds • transmission of sampled values from instrumental transformers: high amount of data, to be transmitted within a few milliseconds, loss of data needs to be detected Application Physical Device ACSI Server Data Data Data Physical Device Application Application

  3. Communication stack Application ACSI GOOSE Samples Client / Server Services MMS ASN.1 ISO Session RFC 1006 TCP IP EthType EthType EthType Ethernet II Priority tagging 802.1p/802.1Q

  4. 61850-8-1 61850-9-2 HV Equipment HV Equipment 61850-9-1 Interface model Technical Services 7 Station Level 9 Function B Function A 1 6 1 6 Bay Level Bay Level 3 8 3 Protection Control Protection Control 4 5 4 5

  5. System overview IEC 61850-8-1 IEC 61850-9-x

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