Topographic diagram of the equipment
The diagram shown is a topographic diagram of the operation of the in-
verter.
The main blocks are the input DC-DC converters (called “boosters”) and
the output inverter. Both the DC-DC converters and the output inverter
operate at a high switching frequency and so enable a compact size and
relatively light weight to be achieved.
Each of the input converters is dedicated to a separate array with inde-
pendent maximum power point tracking (MPPT) control.
This means that the two arrays can be installed with different positions
and orientation. Each array is controlled by an MPPT control circuit.
The two trackers can be congured (when required) in parallel, to handle
power and/or current levels higher than those a single tracker can han-
dle.
This version of inverter is transformerless, meaning it has no galvanic
isolation between input and output, which enables a further increase in
conversion efciency. The inverter is already equipped with all the neces-
sary protective devices for safe operation in compliance with the regula-
tions, even without an isolation transformer.
The inverter is controlled by two independent DSPs (Digital Signal Pro-
cessors) and a central microprocessor.
The connection to the electricity grid is therefore controlled by two inde-
pendent computers, in full compliance with electrical standards regarding
system powering and safety.
The operating system performs the operation of communicating with the
relevant components to carry out data analysis.
All this guarantees optimal operation of the entire unit and high efciency
in all insolation and load conditions, always in full compliance with the
relevant directives, standards and provisions.
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