Function Revision History; Voltage Control Tr1Atcc, Tr8Atcc, Tcmyltc, Tclyltc - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
11.11.4

Function revision history

11.11.5

Voltage control TR1ATCC, TR8ATCC, TCMYLTC, TCLYLTC

Prepare the IED for verification of settings as outlined in section
for test" in this chapter.
The automatic voltage control for tap changer, single control TR1ATCC (90) is based on a transformer
configuration that consists of one tap changer on a single two-winding power transformer.
The automatic voltage control for tap changer, parallel control TR8ATCC (90), 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
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 (90),
TR8ATCC (90) and TCMYLTC (84) and TCLYLTC (84).
• Confirm power system base quantities I1Base, I2Base, V 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 (90) or TR8ATCC (90) is in
accordance with transformer data:
•
• Confirm that the setting for TCMYLTC (84) or TCLYLTC (84) is in accordance with transformer data:
254
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
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) and secondary bus voltage (U
L
1MRK 504 165-UUS Rev. J
GUID-CC62CA75-201A-4C5D-9FD4-89DBFD56F97C v2
"Requirements" and section
) equivalent quantities are required
B
Transformer protection RET670
Commissioning manual
SEMOD175185-3 v13
"Preparing