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2.5.
Configuration and control of the power supply
The power supply can be interfaced by three means:
-
Local touchscreen: a 3.2” colour local touchscreen panel can be used to configure,
monitor and operate the power supply. See section
Local Touchscreen Control Panel
for further information.
-
Analog and digital inputs / outputs: the power supply owns:
o
5 optocoupled digital inputs
o
3 relay outputs
o
3 isolated analog inputs
o
3 isolated analog outputs
-
Remote interface: an Ethernet communication interface with protocol MODBUS/TCP
can be used to configure, monitor and operate the power supply. By using HMI
software application provided by CINERGIA, downloading of excel files is also possible.
2.6.
Functional diagram
The diagram below is the conceptual functions blocks diagram of the power supply:
AC
ACTIVE RECTIFIER
GRID
DC
DC
DC
LOAD
DC/DC
Input LCL
filter
Input EMI
filter
Protections
Protections
Output EMI
filter
Output LCL
filter
OPTIONAL
DC PROGAMMABLE POWER SU PPLY
The main components of the diagram are the following (from grid side to load side):
-
Isolation transformer: a 50/60Hz isolation transformer can be provided optionally in
order to isolate the output channels. In this case, an isolation monitor can be
integrated in the power supply to detect isolation faults too. This isolation transformer
is mandatory if the power supply is to be used as a 4 quadrants equipment (by
connecting the load between two output channels).
-
Input protections: these protections include a thermal-magnetic circuit breaker and
fuses. The connection of the power supply input with the grid is done by screw
terminals. Please follow safety instructions in
Installation
section to connect the DCPS.
-
Input EMI filter: an electromagnetic filter is integrated to fulfil electromagnetic
compatibility regulations. The structure of the filter in question is the same as the one
of the output EMI filter.
-
Input LCL filter: the purpose of this filter is to reduce the current distortion at
frequencies equal to or higher than switching frequency and thus reduce THD.
-
Active Rectifier: a three-branch IGBT active front end is integrated in the equipment to
consume/inject a sinusoidal current from/to the grid.
The DC link voltage is set to 430V providing a regulation margin for fast transients at
the output of the DCPS.
