Teleprotection; Installation - GE D30 Instruction Manual

5.2 PRODUCT SETUP
PATH: SETTINGS PRODUCT SETUP

TELEPROTECTION

5
Digital teleprotection functionality is designed to transfer protection commands between 2 or 3 relays in a secure, fast,
dependable, and deterministic fashion. Possible applications are permissive or blocking pilot schemes and direct transfer
trip (DTT). Teleprotection can be applied over any analog or digital channels and any communications media, such as
direct fiber, copper wires, optical networks, or microwave radio links. A mixture of communication media is possible.
Once teleprotection is enabled and the teleprotection input/outputs are configured, data packets are transmitted continu-
ously every 1/4 cycle (3/8 cycle if using C37.94 modules) from peer-to-peer. Security of communication channel data is
achieved by using CRC-32 on the data packet.
Teleprotection inputs/outputs and direct inputs/outputs are mutually exclusive – as such, they cannot be used simu-
latneously. Once teleprotection inputs/outputs are enabled, direct inputs/outputs are blocked, and vice versa.
NOTE
• NUMBER OF TERMINALS: Specifies whether the teleprotection system operates between 2 peers or 3 peers.
• NUMBER OF CHANNELS: Specifies how many channels are used. If the
system), set the
NUMBER OF CHANNELS
"2" (redundant channels).
• LOCAL RELAY ID NUMBER, TERMINAL 1 RELAY ID NUMBER, and TERMINAL 2 RELAY ID NUMBER: In installa-
tions that use multiplexers or modems, it is desirable to ensure that the data used by the relays protecting a given line
is from the correct relays. The teleprotection function performs this check by reading the message ID sent by transmit-
ting relays and comparing it to the programmed ID in the receiving relay. This check is also used to block inputs if inad-
vertently set to loopback mode or data is being received from a wrong relay by checking the ID on a received channel.
If an incorrect ID is found on a channel during normal operation, the
set, driving the event with the same name and blocking the teleprotection inputs. For commissioning purposes, the
result of channel identification is also shown in the
actual value. The default value of "0" for the
TION
On two- terminals two-channel systems, the same
only the
TERMINAL 1 ID NUMBER
PATH: SETTINGS PRODUCT SETUP

INSTALLATION

5-50
TELEPROTECTION
TELEPROTECTION
FUNCTION: Disabled
NUMBER OF TERMINALS:
MESSAGE
2
NUMBER OF COMM
MESSAGE
CHANNELS: 1
LOCAL RELAY ID
MESSAGE
NUMBER: 0
TERMINAL 1 RELAY ID
MESSAGE
NUMBER: 0
TERMINAL 2 RELAY ID
MESSAGE
NUMBER: 0
to "2". For a two-terminal system, the
has to be programmed on the receiving end.
INSTALLATION
RELAY SETTINGS:
Not Programmed
RELAY NAME:
MESSAGE
Relay-1
D30 Line Distance Relay
Range: Disabled, Enabled
Range: 2, 3
Range: 1, 2
Range: 0 to 255 in steps of 1
Range: 0 to 255 in steps of 1
Range: 0 to 255 in steps of 1
NUMBER OF TERMINALS
NUMBER OF CHANNELS
TELEPROT CH1(2) ID FAIL
STATUS CHANNEL TESTS
indicates that relay ID is not to be checked.
LOCAL RELAY ID NUMBER
is transmitted over both channels; as such,
LOCAL RELAY ID NUMBER
Range: Not Programmed, Programmed
Range: up to 20 alphanumeric characters
5 SETTINGS
5.2.16 TELEPROTECTION
is "3" (three-terminal
can set to "1" or
FlexLogic™ operand is
VALIDITY OF CHANNEL CONFIGURA-
5.2.17 INSTALLATION
GE Multilin