Secondary Test - ABB Relion 670 Series Commissioning Manual

1MRK 504 165-UUS Rev. J
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Terminology
The busbar voltage V
phase-phase voltage, Vij = Vi -Vj, or Vi, where Vi is one single-phase-to-ground voltage.
I is a shorter notation for the measured load current; it is to be used instead of the three-phase
L
quantities Ia, Ib, Ic or the two-phase quantities Ii and Ij, or single-phase current Ii.
For cases where single-mode voltage control is implemented, the Parameter Setting menu structure
includes TR1ATCC:1 instead of the parallel designator TR8ATCC:1.
11.11.5.1

Secondary test

The voltage control function performs basic voltage regulation by comparing a calculated load voltage
(V ) against a voltage range defined by setting VDeadband (with upper and lower limits V2 and V1
L
respectively). The calculated load voltage V
adjusted for Load drop compensation (LDC) where enabled in settings.
When the load voltage V
Transformer protection RET670
Commissioning manual
Tap change timeout duration - effectively the maximum transformer tap change time,
tTCTimeout, available on the local HMI under Main menu /Settings /IED Settings /Control /
TransformerTapControl(84,⇅) /TCMYLTC(84,⇅):x/TCLYLTC(84,⇅):x /tTCTimeout
Load tap changer pulse duration - required length of pulse from IED to load tap changer,
tPulseDur, available on the local HMI under Main menu /Settings /IED Settings /Control /
TransformerTapControl(84,⇅) /TCMYLTC(84,⇅):x/TCLYLTC(84,⇅):x /tPulseDur
Transformer tap range, LowVoltTap and HighVoltTap, available on the local HMI under Main
menu /Settings /IED Settings /Control /TransformerTapControl(84,⇅) /TCMYLTC(84,⇅):x/
TCLYLTC(84,⇅):x /HighVoltTap
Load tap changer code type - method for digital feedback of tap position, CodeType, available
on the local HMI under Main menu /Settings / IED settings /Control /
TransformerTapControl(84,⇅) /TCMYLTC(84,⇅):x/TCLYLTC(84,⇅):x /CodeType
During the installation and commissioning, the behavior of the voltage control functions
for different tests may be governed by a parameter group, available on the local HMI
under Main menu /Settings /IED Settings /Control /TransformerVoltageControl(90,
U↕) /TR1ATCC(90, U↕):x/TR8ATCC(90, U↕||):x. These parameter settings can cause a
Total Block, Automatic Block or Alarm for a variety of system conditions including over
and under voltage, over current and tap changer failure. It is important to review these
settings and confirm the intended response of the voltage control function for different
secondary injection tests.
is a shorter notation for the measured voltages Va, Vb, Vc or Vij, where Vij is the
B
Also note that for simplicity, the Parameter Setting menu structures included in the
following procedure are referred to universally as VCP1, for example, Main menu /
Settings /IED Settings /Control /TransformerVoltageControl(90, U↕) /TR1ATCC(90,
U↕):x/TR8ATCC(90, U↕||):x /Time /t1 and t2
Note that when LDC is disabled, V
stays within the interval between V1 and V2, no action will be taken.
L
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represents the secondary transformer bus voltage V
L
equals V .
B L
Section 11
Testing functionality by secondary injection
SEMOD175185-145 v5
B
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