ABB REG670 2.0 IEC - Voltage Control (VCTR) TR1 ATCC, TR8 ATCC, TCMYLTC, TCLYLTC

12.10.3 Voltage control (VCTR) TR1ATCC, TR8ATCC, TCMYLTC,
TCLYLTC
Prepare the IED for verification of settings outlined in section "Requirements" and
section
"Preparing for test" in this chapter.
The automatic voltage control for tap changer, single control TR1ATCC 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, 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
L
) and secondary bus voltage (UB) equivalent
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, TR8ATCC and TCMYLTC and TCLYLTC.
• Confirm power system base quantities I1Base, I2Base, UBase.
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
.
• Confirm that the setting for short circuit impedance Xr2 for TR1ATCC or
TR8ATCC is in accordance with transformer data:
• Short circuit impedance, available on the local HMI under Main menu/
Settings/General settings/Control/
Section 12 1MRK502053-UEN B
Testing functionality by secondary injection
212 Generator protection REG670 2.0 IEC
Commissioning manual