Interface group:
The interface is a protection device of the grid involved in
case of faults in the electrical grid. The interface inhibits the
release of electric current of the photovoltaic system in the
network, in the case where is no voltage on the national grid or in
the case in which the parameters of the network found to incorrect.
It is therefore a measure of protection placed to grid security, of
the system and who should be working. It is composed by Interface
relay which opens the Interface
protectionboth in
case of fault internal to the protections both for fault of the network.
Sizing on power
of inverter (Sizing factor):
Represents the degree of exploitation of the inverter in
terms of power, it is the ratio between the nominal power of the PV
array input and the DC power of inverter
System temperature calculated by
the temperature of location: The program calculates the
temperature of the photovoltaic modules starting from the value of
the ambient temperature and the NOCT (Nominal Operating Cell
Temperature) of the cells of the modules. In the event that this
value is not present between the data of the PV module it assumes
NOCT = 50. The temperature of the module is calculated as follows:
TModule = T + (NOCT - 20.0) * 1000.0 / 800.0.
Net metering, is an
electricity policy for consumers who own renewable energy facilities
such as photovoltaic. In this context, it is used with the meaning
what remains after deductions", in this case the deduction of
any energy outflows from metered energy inflows. Under net metering,
a system owner receives retail credit for at least a portion of the
electricity they generate.
Net present value (NPV), establishes
the convenience of investment envisaged, by discounting the future
cash flows, in order to detect the current value of the investment.
Self-consumption [kWh], is
the amount of energy produced by the plant and at the same time
consumed by the user. The program indicates this amount as share of
self-consumption as the percentage of production of system
self-consumed by the user.