Tap Changer Control And Supervision Tcmyltc, Tclyltc - ABB REG670 Commissioning Manual

Section 13
Testing functionality by secondary injection
13.10.3
.
258
such cases, where there is a mismatch, the user is advised to make a
complete cycle of block/unblock operations to align the statuses.

Tap changer control and supervision TCMYLTC, TCLYLTC

Prepare the IED for verification of settings outlined in Section
verify settings".
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
quantities 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 (90), TR8ATCC (90) and TCMYLTC (84) and TCLYLTC (84).
• Confirm power system base quantities I1Base, I2Base, VBase.
Main menu/Settings/Setting Group N/Control/
TransformerVoltageControl(ATCC,90)/TR1ATCC:x/TR8ATCC:x/General
and
Main menu/Settings/Setting Group N/Control/
TransformerVoltageControl(ATCC,90)/TR1ATCC:x
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
) and secondary bus voltage (U
L
1MRK 502 073-UUS A
SEMOD175185-3 v11
"Preparing the IED to
) equivalent
B
Commissioning manual