Power One AURORA PVI-10.0/12.5-OUT-xx, Руководство по эксплуатации и установке

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Operation and installation manual Page 11 of 82
(PVI-10.0/12.5-OUTD-xx Rev:1.2)
2 DESCRIPTION OF THE SYSTEM
The AURORA inverter is capable of feeding a power grid using the power generated
by photovoltaic panels.
Photovoltaic panels transform the sun-radiated energy into electrical energy in the
form of direct (DC) current (through a photovoltaic field, also known as PV
generator). In order to utilize this energy and feed it back to the distribution grid, this
energy shall be turned into alternating (AC) current. Aurora does this conversion, also
known as DC to AC inversion, in a very efficient way, without using rotating parts but
just static power electronic devices.
When used in parallel with the grid, the alternate current generated by the inverter is
directly fed to the household distribution circuit, which is in its turn also connected to
the public power distribution grid.
The solar energy system powers all connected electric items: lighting, household
appliances, etc.
When the photovoltaic system is not generating sufficient energy, the power required
to ensure proper operation of connected loads is taken from the public power grid.
While if the produced energy is too much, it is directly fed to the grid, thus becoming
available to other users.
According to national and local standards and regulations the produced energy can be
sold to the grid or credited to the user against future consumption, thus granting a great
saving of money.
2.1 Key elements of a photovoltaic system: “STRINGS” and “ARRAYS”
The so-called STRINGS technology has been developed in order to reduce the
installation costs of a photovoltaic system as much as possible. These costs are mainly
related to the wiring operations on inverter DC side and the consequent distribution on
the AC side.
A photovoltaic panel is composed of many photovoltaic cells assembled on the same
mount. A STRING is composed of a certain number of panels electrically connected in
series. An ARRAY is composed by one or more strings connected in parallel.
Larger photovoltaic systems may be implemented by using several arrays connected to
one or more AURORA inverters.
The greater the number of panels in each string, the lower the cost and the less
complex the wiring connections of the system.