Operation Principle - ABB RELION REX640 Technical Manual

1MRS759142 C
4.3.2.5
REX640
Technical Manual
in this document. The configuration can be written to the protection relay once the
mismatch is corrected.

Operation principle

The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
The operation of TR2PTDF can be described by using a module diagram. All the
modules in the diagram are explained in the next sections.
I_A1
I_B1
I3P1
I_C1
I_A2
I_B2
I3P2
I_C2
TAP_POS
BLK_OPR_HS
BLOCK
BLK_OPR_LS
GUID-6CC7CC6B-492A-4D1C-B391-1BACAE6770B9 V1 EN
Figure 328: Functional module diagram
Differential calculation
TR2PTDF operates phase-wise on a difference of incoming and outgoing currents.
The positive direction of the currents is towards the protected object.
Differential
calculation
Transformer
vector group
matching
Instantaneo
us high
Zero-sequence
stage
component
elimination
Compensation
of tap changer
position
Second
harmonic
blocking
Biased
Fifth harmonic
low stage
blocking
Waveform
blocking
Section 4
Protection functions
OPERATE
OR
OPR_HS
OPR_LS
BLKD2H
BLKD5H
BLKDWAV
593