Communication solutions for power utilities
UNIVERSAL TELEPROTECTION TPU-1
INSTALLATION AND COMMISSIONING MANUAL Web version TPU-1R - Rev. 5.9 (May 2018)
The substation has a local centre that processes all the information from and towards the
IEDs, taking the appropriate telecontrol decisions and deciding what information should be
sent or requested externally.
The GOOSE (Generic Object Oriented Substation Events) message allows the
conventional wiring for communication between relays or protections and teleprotections to
be replaced. When the IED detects an event it must notify the change to the reception
devices that it has registered, using a multicast transmission. The requirements are
demanding. Therefore, no more than 4 ms delay is allowed from the moment the event
takes place to the transmission of the message.
The number of IEDs, the network topology and the type of event determines the number
of messages generated after an event. The GOOSE messages are retransmitted several
times for each IED, given that in this environment collisions are somewhat possible. The
LAN configurations with switch or hub at 100 Mbit/s are capable of delivering more than
100 messages within the 4 ms permitted.
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