Power One AURORA PVI-6000-OUT-US-W, Installation And Operation Manual

Page: 11 / 77

User Manual Page 11 of 77
(PVI-6000-OUTD-US-W Rev.2.0)
1 INTRODUCTION
This document contains technical description of AURORA Wind inverters. It is
intended to provide the installers and users with all the necessary information about
installation, operation, and use of AURORA Wind inverters.
2 SYSTEM DESCRIPTION
The AURORA inverter is capable of feeding power to the grid converting the
power generated by a wind turbine. The wind turbine (using a generator) converts
the mechanical energy from wind into the 3-phase AC voltage. The voltage and
frequency of the AC generated by the wind turbine are variable and depend on the
wind speed. To be exported to the utility grid the power need to be converted to the
frequency and voltage level of the grid.
When used in parallel with the grid, the alternate current generated by the inverter
is directly fed into the distribution circuit, which is also connected to the public
power distribution grid.
The wind energy system can thus powers all the connected users, such as lighting
devices, household appliances, etc.
When the wind turbine is not generating enough energy, the power required by the
connected users is provided by the public power grid. If the energy produced by
the wind turbine exceeds the quantity required by the user’s loads, then extra
power is directly fed to the grid, becoming available to other users.
According to national and local standards and regulations the energy produced can
be sold to the electrical utility or credited to the user against future consumption,
thus providing financial savings.
2.1 Key elements of a wind energy system: “WIND TURBINE” and
“GENERATOR”
Two elements are necessary in order to harvest the wind energy: a wind turbine
that will spin based on the wind speed and a generator.
The turbine forces the generator to rotate thus producing energy that can be
exported to the grid.
The most common turbine design has a horizontal rotor with 2 or 3 vertical
fiberglass blades forming the propeller which may have a fixed or a variable tilt.
The generator is fixed on the rotor. Usually for the small wind system a
synchronous permanent magnet generator is used. The current generated by this