the
Operation mode
setting is set to "Input control", the acting operation mode is
determined by the inputs PARALLEL and AUTO. When the
Operation mode
setting
is set to "Command", the acting operation mode is determined by the IEC 61850
command data points Auto and ParOp. The PARALLEL input and ParOp define if
the transformer (voltage regulator) is in the parallel or single mode. The AUTO input
defines the operation status in the single mode. PARALLEL and AUTO Monitored
data represent acting "Parallel or single operation" and "Auto/Manual indication"
respectively.
Table 1013: Acting operation mode determined by the operation mode inputs and
command signals
PARALLEL AUTO Operation Mode
0 0 Manual
0 1 Auto single
1 0 or 1 Auto parallel
Furthermore, if
Operation mode
has been set to "Auto parallel", the second setting
parameter
Auto parallel
mode defines the parallel mode and the alternatives are
"Auto master", "Auto follower", "MCC" or "NRP".
The acting operation mode can be read from the monitored data OPR_MODE_STS.
Command Exclusion
An acting operation mode change using two inputs ( PARALLEL and AUTO) and
setting group change (either with the input or via menu) is needed when the acting
operation mode must be changed automatically, that is, there is a logic which drives
these two inputs and setting group change based on the status information from
the circuit breakers.
The common Local/Remote (L/R) exclusion concerns the manual raising and
lowering commands of OLATCC, that is, it internally proves the exclusion
mechanism to prevent the remote commands (from SCADA) when the IED is in local
mode.
9.5.4.4 Manual voltage regulation
The manual raising and lowering commands can be given either via the
configuration inputs LOWER_LOCAL and RAISE_LOCAL, via the HMI of the IED or via
remote commands. The acting operation mode of OLATCC must be set to "Manual"
and the Local/Remote control LR state monitored data of the IED has to be "Local"
to execute the control commands manually from HMI or via configuration inputs.
Although OLATCC is set to "Manual" but the LR state is set to "OFF" or "Remote", no
manual control commands can be given.
For remote commands, the acting operation mode of the OLATCC function must
also be set to "Manual" and the LR state monitored data has to be "Remote".
The manual raising or lowering commands can be given locally either via the
Manual
control
parameter ("Cancel"/"Lower"/"Raise") located in the HMI menu Control >
OLATCC1 or via the configuration inputs LOWER_LOCAL or RAISE_LOCAL.
A raising command is given by selecting the enumeration value "Raise" and
the lowering command is given by selecting the enumeration value "Lower". An
accepted manual raising/lowering command activates the corresponding output
RAISE_OWN or LOWER_OWN to control the voltage of the own transformer.
1MRS757644 H
Control functions
620 series
Technical Manual
1049
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