Protections; Anti-Islanding - Power One AURORA PVI-3.8-I-OUTD Manuel D'utilisation Et D'installation

Installation and operating manual Page 17 of 95
(PVI-3.8/4.6-I-OUTD Rev.: 1.5)
operation, in compliance with the applicable regulations as described in the paragraph
on protective devices.
The block diagram shows the PVI-3.8/4.6-I-OUTD model with two independent
converters on DC-DC input. Each of these converters is dedicated to a separate array
with an independent Maximum Power Point Tracking (MPPT) control. This means
that the two arrays can be installed in different positions, facing in different directions.
Each array is controlled by an MPPT control circuit.
Due to the size and high efficiency of the AURORA inverters and the thermal
dissipation system, operation at maximum power in a wide range of ambient
temperatures is guaranteed.
The inverter is controlled by two independent DSPs (Digital Signal Processors) and by
a central microprocessor.
Connection to the power supply grid is thus controlled by two independent controllers,
in full compliance with the current regulations for electrical power supply and its
safety.
The AURORA inverter operating system communicates with related components in
order to carry out data analysis.
All of this ensures the optimal operation of the entire system and a high yield in all
isolation and load conditions, always fully respecting the relevant directives, laws and
regulations.
2.4

Protections

2.4.1

Anti-Islanding

In the event of a failure in the local distribution grid due to the power supply provider,
or if the machine is shut down for maintenance operations, the inverter must be
physically disconnected in a safe manner, in order to guarantee the protection of those
working on the grid, all in full compliance with the applicable national standards and
laws. In order to avoid any islanding operations, the inverter is equipped with an
automatic disconnection system, a protection known as "Anti-Islanding".
The PVI-3.8/4.6-I-OUTD model is equipped with an advanced anti-islanding
protection system, all in accordance with the relevant national standards
and laws.