Configuration of this data flow is made in the SMT tool as shown in Figure
.
Currents from
remote end 1
Currents to
remote end 1
Currents from
remote end 2
Currents to
remote end 2
LDCM 2
LDCM 1
Currents from
local CT
A/D
SMAI
Pre-processing
block
Line Differential
function
L3DPDIF
IEC05000533-2-en.vsd
IEC05000533-NEW V2 EN-US
Figure 52: Typical configuration of analog signals for a three-terminal line
Figure
shows how one IED in a three-terminal line differential protection can be configured.
There are two LDCMs each supporting a duplex connection with a remote line end. Thus, the
same local current is configured to both LDCMs, while the received currents from the LDCMs
are configured separately to the line differential protection function.
6.3.2.7
Configuration of LDCM output signals
M12022-93 v2
There are a number of signals available from the LDCM that can be connected to the virtual
binary inputs (SMBI) and used internally in the configuration. The signals appear only in the
Signal Matrix tool where they can be mapped to the desired virtual input.
For explanation of the signals, refer to section Remote communication, Binary signal transfer
to remote end in the technical reference manual. The signal name is found in the Object
Properties window by clicking on the input signal number in the Signal Matrix tool. Connect
the signals to the virtual inputs as desired, as shown in figure
1MRK 505 343-UEN B
Section 6
Differential protection
121
Application manual
Summary of Contents for Relion 670 series
Page 1: ...RELION 670 SERIES Line differential protection RED670 Version 2 1 IEC Application manual...
Page 2: ......
Page 40: ...34...
Page 64: ...58...
Page 150: ...144...
Page 406: ...400...
Page 472: ...466...
Page 494: ...488...
Page 512: ...506...
Page 524: ...518...
Page 604: ...598...
Page 686: ...680...
Page 718: ...712...
Page 722: ...716...
Page 758: ...752...
Page 759: ...753...