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Section 5
GOOSE
5.1
Horizontal communication
GOOSE is used in substation automation for fast horizontal communication between
the protection relays. GOOSE can be used for direct data exchange, for example, of
interlocking and blocking information between protection relays. According to the
IEC 61850-8-1 standard, GOOSE uses a publisher/subscriber profile in which
information is shared from one device to one or several devices by using Ethernet
multicast messages. A message is an image of a sent IEC 61850 data set that is defined
in the configuration.
The protection relay can send any type of status or measurement data in the GOOSE
messages from its IEC 61850 data model. The status data response time, that is, the
time it takes for the application to handle a received GOOSE message and to send the
concerned data back to the network, is below 3 ms. The response time fulfils the
tightest Type 1A, Class P2/3 requirements of the standard.
When the protection relay is configured to send measurements, the analog, integer or
counter type data should be placed in its own data set to minimize the bandwidth
consumption in the network and to avoid unnecessary publishing of unchanged status
data. The triggering of analog data sending is controlled by deadband handling, zero-
point clamping and limit supervision.
The horizontal communication configuration consists of the protection relays'
GOOSE control block, data set and GOOSE input configuration. The result of the
configuration work is a system configuration which is used for the protection relays.
The used files in the workflow are IEC 61850 standard format SCL files.
5.1.1
Configuring horizontal communication
Configure GOOSE by using the IEC 61850 Configuration tool in PCM600 or by using
the separate IET600 tool. PCM600 interacts with IET600 by importing and exporting
SCL files.
5.2
GOOSE publishing properties
GOOSE data is transmitted event based and at regular intervals in 802.1Q multicast
frames over the LAN. Peer devices can determine the state of the communications by
listening for the transmissions. When the data values change, the data is transmitted at
1MRS757809 C
Section 5
GOOSE
REC615 and RER615
23
Engineering Guide