Fimer PVS-10-TL, Руководство по эксплуатации продукта, Страница: 25 / 80

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3.9 Description of the equipment
This equipment is a string inverter which converts the direct current of a photovoltaic generator into alternating current and feeds it into
the public distribution grid.
Photovoltaic panels convert solar radiation into “DC” direct current electrical energy (via a photovoltaic field, also called PV generator); in
order to be used from final user, it is transformed into “AC” alternate current. This conversion, known as inversion from DC to AC, is done
in an efficient way by the FIMER inverters, without using any rotary elements, rather only via static electronic systems.
In order to allow inverter operation in safe thermal and electrical conditions, the unit automatically reduces the value of the power fed into
the grid under adverse environmental conditions or unsuitable input voltage values.
When connected in parallel with the grid, the alternating current from the inverter flows directly into the domestic or industrial distribution
circuit, which is in turn connected to the public distribution grid.
In this way the solar energy system compensates the energy drawn from the utilities connected to the grid to which the inverter is linked.
When the photovoltaic system is not generating enough energy to ensure proper operation of connected loads, the remaining required
power is taken from the public distribution grid. While if too much energy is produced, it is directly fed into the grid, thus becoming available
to other users.
According to national and local standards and regulations, the produced energy can be sold to the local grid owner or credited to the user
against future consumption, thus granting a great saving of money.
3.9.1 Operating diagram (example)
3.9.2 Mutual connection of multiple inverters
If the photovoltaic system exceeds the capacity of a single inverter, it is possible to connect multiple inverters to the system, each of them
in turn connected on the DC side to a separate section of the photovoltaic generator, and on the AC side to the distribution grid.
Each inverter will work independently of the others and its own photovoltaic module will supply the maximum power available to the grid.
3.9.3 Notes on the system sizing
Decisions on how to structure a photovoltaic system depend on a series of factors and considerations, such as type of panels, space
availability, future location of the system, energy production goals over the long term, etc.
NOTE –
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A configuration program that can help to correctly size the photovoltaic system is available on the FIMER website
( http://stringsizer.fimer.com ).