Table of Contents
Advertisement
Section 11
Testing functionality by secondary injection
Before starting any test, verify the following settings in PCM600 or the local HMI for TR1ATCC,
TR8ATCC and TCMYLTC and TCLYLTC.
•
Confirm power system base quantities I1Base, I2Base, U Base.
Main menu /Settings /IED Settings /Control /TransformerVoltageControl(90, U↕) /TR1ATCC(90,
U↕):x/TR8ATCC(90, U↕||):x /General
and
Main menu /Settings /IED Settings /Control /TransformerTapControl(84,⇅) /TCMYLTC(84,⇅):x
•
Confirm that the setting for short circuit impedance Xr2 for TR1ATCC or TR8ATCC is in
accordance with transformer data:
•
•
Confirm that the setting for TCMYLTC or TCLYLTC is in accordance with transformer data:
•
•
•
•
Terminology
The busbar voltage U
Uij is the phase-phase voltage, Uij = Ui -Uj, or Ui, where Ui is one single-phase-to-earth voltage.
I
is a shorter notation for the measured load current; it is to be used instead of the three-phase
L
quantities IL1, IL2, IL3 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.
242
Short circuit impedance, available on the local HMI under Main menu /Settings /IED
settings /Control /TransformerVoltageControl(90, U↕) /TR1ATCC(90, U↕):x/
TR8ATCC(90, U↕||):x /Xr2
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 UL1, UL2, UL3 or Uij, where
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
© 2017 - 2022 Hitachi Energy. All rights reserved
1MRK 504 165-UEN Rev. K
Transformer protection RET670
Commissioning manual
Advertisement
Table of Contents
