Generic Substation Events#Generic Object Oriented Substation Events .28GOOSE.29

Generic Object Oriented Substation Events ( GOOSE ) is a echzeitfähiges network protocol for controlling devices over Ethernet networks. It is by the International Electrotechnical Commission (IEC) specified in the standard IEC 61850.

GOOSE sending messages about the state of a device periodically at a fixed interval (eg, every second). Change of state is encoded for error correction in a repetition code. The GOOSE messages are sent via multicast, that is, it may be the same time more than one recipient will be informed about the state of a transmitter.

A typical application of GOOSE is the spontaneous transfer of state changes of switching devices (eg switch position On / Off) or other status messages in substations that need to be sent to all network participants. The advantage of the device control via Ethernet over a traditional direct device - to-device interconnection is in the open configuration of the network-attached devices. For new transmitter and receiver relationships no new wiring is required. The spread of Ethernet and the possibility of using Ethernet for more services are further reasons for an application of this technique.

GOOSE datagrams set the Ethertype field in Ethernet packets, making prioritization are mapped directly to the Ethernet data link layer (see also IEEE 802.1Q ). By prioritizing the datagrams over the IP packets in the network switches are preferably treated so that the delay in the network is minimized, and reach the receiver GOOSE messages in accordance with a time window. This log structure allows the real-time capability of GOOSE. By VLANs GOOSE telegrams may be limited to certain segments of the network.

• Network protocol