Power One Aurora CCD, Manual

Page: 12 / 82

Page
11
of
80 Instruction Manual for AURORA CDD BCG.00613_AA
Part
1 Introduction and Safety
1.4 SYSTEM INTEGRATION
1.4.1 T
HE
MICRO I
NVERTER
S
YSTEM
This system is composed of a group of MICRO Inverters that convert direct electric current from a
photovoltaic module into alternating electric current and feeds it into the electric grid.
Photovoltaic modules transform energy from the sun into direct current (DC) electrical energy
(through a photovoltaic field, also called photovoltaic module). In order to use it, it is necessary to
transform the type of current into alternating “AC”. This conversion, known as DC to AC inversion,
is made efficiently without using rotating parts and only through static electronic devices.
In order to allow inverter operation in safe thermal and electrical conditions, in the event of
adverse environmental conditions or unsuitable input voltage values, the unit automatically
reduces the value of the power fed into the grid. This way the solar energy system compensates for
the energy drawn from the utilities connected to the grid to which it is linked. The solar energy
system therefore powers all connected electrical devices, from lighting to household appliances, etc.
When the photovoltaic system is not supplying sufficient power, the power needed to ensure
normal operation of the connected electrical devices is drawn from the national grid. If, on the other
hand, excess power is produced, this is fed directly into the grid, so becoming available to other
consumers.
In accordance with local and national regulations, the power produced can be sold to the grid or
credited towards future consumption, so bringing about a saving of money.
1.4.2 C
HARACTERISTICS OF
MICRO-
INVERTERS
Unlike systems subdivided into strings controlled by one or several inverters, systems of this sort
are built for the incorporation of a MICRO Inverter for each photovoltaic module
.
Each MICRO-Inverter works independently of the others, thus its own photovoltaic module supplies
the maximum power available to the grid. This setup enables a direct control over the production of
a single photovoltaic module, consequently optimizing production as much as possible.
1.4.3 D
ESCRIPTION OF THE
CDD
The Power-One devices (MICRO Inverters) associated with the CDD are monitored using CDD
display, the CDD web server interface, or from the Aurora Vision monitoring portal.
The display for the CDD permits simultaneous monitoring of all the devices associated to it.