Hitachi Relion 670 Series Applications Manual page 326

Section 22
Basic IED functions
The examples shows a situation with adaptive frequency tracking with one reference selected for all
instances. In practice each instance can be adapted to the needs of the actual application. The adaptive
frequency tracking is needed in IEDs that belong to the protection system of synchronous machines and
that are active during run-up and shout-down of the machine. Also, adaptive frequency tracking is
needed in PMU application to be compliant to PMU standards. In other application the usual setting of
the parameter DFTReference of SMAI is InternalDFTRef.
Example 1
BLOCK BLOCK BLOCK BLOCK
DFTSPFC DFTSPFC DFTSPFC DFTSPFC
^GRP1_A ^GRP1_A ^GRP1_A ^GRP1_A
^GRP1_B ^GRP1_B ^GRP1_B ^GRP1_B
^GRP1_C ^GRP1_C ^GRP1_C ^GRP1_C
^GRP1_N ^GRP1_N ^GRP1_N ^GRP1_N
TYPE TYPE TYPE TYPE
ANSI07000198 V2 EN-US
Figure 130:
Assume instance SMAI7:7 in task time group 1 has been selected in the configuration to control the
frequency tracking . Observe that the selected reference instance (i.e. frequency tracking master) must
be a voltage type. Observe that positive sequence voltage is used for the frequency tracking feature.
For task time group 1 this gives the following settings (see Figure
SMAI1:1: DFTRefExtOut = DFTRefGrp7 to route SMAI7:7 reference to the SPFCOUT output,
DFTReference = DFTRefGrp7 for SMAI1:1 to use SMAI7:7 as reference (see Figure 130) SMAI2:2 –
SMAI12:12: DFTReference = DFTRefGrp7 for SMAI2:2 – SMAI12:12 to use SMAI7:7 as reference.
For task time group 2 this gives the following settings:
320
The user should use 0.9 ms task time for connection to PMU functions.
SMAI1:1 SMAI1:1 SMAI1:1
SPFCOUT SPFCOUT SPFCOUT SPFCOUT
AI3P AI3P AI3P AI3P
AI1 AI1 AI1 AI1
AI2 AI2 AI2 AI2
AI3 AI3 AI3 AI3
AI4 AI4 AI4 AI4
AIN AIN AIN AIN
Configuration for using an instance in task time group 1 as DFT reference
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SMAI1:13 SMAI1:13 SMAI1:13
BLOCK BLOCK BLOCK BLOCK SPFCOUT SPFCOUT SPFCOUT SPFCOUT
DFTSPFC DFTSPFC DFTSPFC DFTSPFC AI3P AI3P AI3P AI3P
^GRP1_A ^GRP1_A ^GRP1_A ^GRP1_A AI1 AI1 AI1 AI1
^GRP1_B ^GRP1_B ^GRP1_B ^GRP1_B AI2 AI2 AI2 AI2
^GRP1_C ^GRP1_C ^GRP1_C ^GRP1_C AI3 AI3 AI3 AI3
^GRP1_N ^GRP1_N ^GRP1_N ^GRP1_N AI4 AI4 AI4 AI4
TYPE TYPE TYPE TYPE AIN AIN AIN AIN
SMAI1:25 SMAI1:25 SMAI1:25
BLOCK BLOCK BLOCK BLOCK SPFCOUT SPFCOUT SPFCOUT SPFCOUT
DFTSPFC DFTSPFC DFTSPFC DFTSPFC AI3P AI3P AI3P AI3P
^GRP1_A ^GRP1_A ^GRP1_A ^GRP1_A AI1 AI1 AI1 AI1
^GRP1_B ^GRP1_B ^GRP1_B ^GRP1_B AI2 AI2 AI2 AI2
^GRP1_C ^GRP1_C ^GRP1_C ^GRP1_C AI3 AI3 AI3 AI3
^GRP1_N ^GRP1_N ^GRP1_N ^GRP1_N AI4 AI4 AI4 AI4
TYPE TYPE TYPE TYPE AIN AIN AIN AIN
SMAI1:37
BLOCK BLOCK SPFCOUT SPFCOUT
DFTSPFC DFTSPFC AI3P AI3P
^GRP1_A ^GRP1_A AI1 AI1
^GRP1_B ^GRP1_B AI2 AI2
^GRP1_C ^GRP1_C AI3 AI3
^GRP1_N ^GRP1_N AI4 AI4
TYPE TYPE AIN AIN
ANSI07000198.vsd
129 for numbering):
Phasor measurement unit RES670
1MRK511407-UUS Rev. N
Application manual