Technology
specifities is a free text (up
to 5 lines) for additional descriptions of the Inverter, like
the technology, operating conditions, display and data exchange
possibilities, etc.
Two "operational" specifications may
be defined using these texts:
- When mentioning
"SolarEdge
Architecture", this activates
this particular operating mode in the Design and simulation
process.
- When mentioning
"Bi-polar" or "Bipolar", this
means that the inverter has bi-polar inputs defined as +/-
voltages. This allows to define strings of twice the
voltage.
Sizes
obviously defines the sizes and
weight of the inverter.
Operating
Conditions - Behaviour at limits gives access to additional parameters which
are usually only applicable to very old devices - of for special
analysis purpose.
| Operating mode
|
will always be "maximum power point", i.e. the input
electronics is continuously searching for the best operating point
on the array characteristics, giving the maximum power (I *
V). |
|
|
Although the fixed voltage mode
is quite obsolete with modern inverters, it is still supported by
PVsyst. |
|
|
NB:The SolarEdge architecture
uses fixed voltage inputs, but connected to strings of their suited
DC-DC power optimizer. |
| Behaviour at Pnom can have the following
options: |
|
|
Power
limitation: during
overload (too much available energy at MPP), any modern inverter
will limit the input power at the nominal value by displacing the
operating point on the array I/V curve. This mode gives rise to
usually low losses (only the excess virtual energy during very high
productions), allowing to
oversize the nominal array power with respect to the
inverter power (economic optimisation, depending on the system
properties). |
| -
|
Cut :
when reaching overload, some old inverter models were simply
cutting the PV production by safety (i.e. the array current
was zero and the array voltage attained Voc). |
| -
|
Cut up
to evening : same case as above, but the inverter was not
able to start again as long as the input was not null. |
Behaviour at Vmin/Vmax :
| - |
Limitation: as above, in modern inverters the
operating point is clipped at the limit voltage when MPP goes
outside the window. |
|
|
Cut:
in some old models the inverter production was stopped when
encountering such conditions. |
