ABB Relion 670 Series Commissioning Manual page 225

1MRK 504 165-UEN E
The automatic voltage control for tap changer, parallel control TR8ATCC, if installed, may be
set to operate in Master Follower (MF) mode, or Minimise Circulating Current (MCC) mode. The
commissioning tests for each parallel control mode are addressed separately in the following
procedure.
Secondary injection of load current (I
are required during installation and commissioning tests. The test consists mainly of:
1. Increasing or decreasing the injected voltage or current at the analogue inputs of the IED.
2. Checking that the corresponding commands (Lower or Raise) are issued by the voltage
control function.
Setting confirmation is an important step for voltage control in the installation and
commissioning phase to ensure consistency of power systems base quantities, alarm/
blocking conditions and parallel control settings for each transformer control function.
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
Main menu/Settings/IED Settings/Control/TransformerVoltageControl(ATCC,90)/
TR1ATCC:x/TR8ATCC:x/General
and
Main menu/Settings/IED Settings/Control/TransformerVoltageControl(ATCC,90)/
TR1ATCC:x
.
• Confirm that the setting for short circuit impedance
accordance with transformer data:
•
• Confirm that the setting for TCMYLTC or TCLYLTC is in accordance with transformer data:
•
•
•
•
Transformer protection RET670
Commissioning manual
Short circuit impedance, available on the local HMI under Main menu/Settings/IED
settings/Control/TransformerVoltageControl(ATCC,90)/TR1ATCC:x/TR8ATCC:x/
Xr2.
Tap change timeout duration - effectively the maximum transformer tap change
tTCTimeout , available on the local HMI under Main menu/Settings/IED
time,
Settings/Control/TransformerTapControl(YLTC,84)/TCMYLTC:x/TCLYLTC:x/
tTCTimeout.
Load tap changer pulse duration - required length of pulse from IED to load tap
tPulseDur , available on the local HMI under Main menu/Settings/IED
changer,
Settings/Control/TransformerTapControl(YLTC,84)/TCMYLTC:x/TCLYLTC:x/
tPulseDur.
Transformer tap range,
under Main menu/Settings/IED Settings/Control/
TransformerTapControl(YLTC,84)/TCMYLTC:x/TCLYLTC:x/HighVoltTap and .
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(YLTC,84)/TCMYLTC:x/TCLYLTC:x/CodeType.
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) and secondary bus voltage (U
L
I1Base , I2Base , UBase .
LowVoltTap and HighVoltTap , available on the local HMI
Testing functionality by secondary injection
) equivalent quantities
B
Xr2 for TR1ATCC or TR8ATCC is in
Section 11
219