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Instead of utilizing the IP protocol to define the destination, GOOSE is utilizing the Ethernet multicasting. Any IED that is connected to the same switch as the sending IED is receiving the GOOSE packet and then can decide to use this information or drop it. It is doing so by fixing the destination MAC-address range to 01-0C-CD-01-00 to 01-0C-CD-01-FF1F-FF. With a destination address starting with 01 defining the mulsticast multicast range.
Repetition Strategy
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GOOSE control block (GCB)
The service GOOSE can be find found in the data model of the IED. It is represented there with a very specific data object called GCB. GOOSE control block can only be allocated in the logical node LLN0. A GOOSE control block is like a data object, structured data. Instead of data attributes, the control block hold configuration setting for the GOOSE such as:
GoCBName: the name of the GCBGoCBRef: the reference of the GCB in the data modelGoEna: whether the GOOSE is activeGoID: the GOOSE IDDataSet: the reference to the data setConfRef: a an integer number indicating changes in the GOOSE data setNdsCom: whether the GOOSE still to be commitionedcommissionedDstAddress: the destination MAC-address of the GOOSE
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R-GOOSE
The R-GOOSE stand for routable routeble GOOSE. This fairly new tye type of GOOSE is utelizing utilizing the IP protocol. With that, a GOOSE can be routed through the wide area network. It is mainly used to comminnucated communicated between two sustations substations where both of the substation are seperate separate LAN connected through WAN. Typical examples are permissive overreach transfer trip (POTT) or Permissive Underreaching Transfer Trip permissive underreaching transfer trip (PUTT) protection schemes.