Physical Characteristics
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Power Electronics
The GT100 Power Electronics section contains the converter control unit (CCU2)
and the power electronics matrix. Also found within the Power Electronics section
are the Hall-effect current transducers, and an internal air circulation fan.
Converter Control Unit (CCU2)
The CCU2 is a Digital Signal Processor (DSP) based control board that performs
numerous control and diagnostic functions associated with GT100 operation. Its
most significant tasks are control of GT100 electromechanical components and
power electronics converters, communication with the Universal Front Panel
Control Unit, and system sensors. The CCU2 also contains the necessary DC
power supplies to support its operation.
Power Electronics Matrix
The power electronics converter matrix consists of switching transistors (IGBTs),
transistor gate drive electronics, laminated DC bus structure, DC capacitors and
an aluminium extrusion heatsink with a cooling fan. The fan is located behind the
matrix assembly and forces air down through the heatsink.
The PV array is tied logically to the matrix DC bus within the DC Interface
section. The embedded CCU2 control unit manages the transfer of power between
the DC bus and the utility grid.
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