See also
SolarEdge Architecture.
Due to the fact that the SolarEdge systems
operate at a fixed voltage, the strings connected in parallel on an
inverter input operate completely independently.
This is in
contradiction with the usual philosophy of PVsyst. In practice, we
will consider each SolarEdge string as equivalent to one MPPT
input.
Now in PVsyst we define "Sub-arrays" which describe all the
properties of a given MPPT input (PV module, optimizer and
inverter models, number of optimizers in series, orientation). This
SolarEdge architecture also requires that we define each Inverter independently, and
attribute different strings - from different sub-arrays - as inputs
of each inverter.
Therefore when defining a SolarEdge system,
yhou should:
| - |
First define all the strings you
want to implement in your system. You will define a speciific
Sub-array for each kind of
string, with module, converter, inverter, number of
optimizers in series, orientation . You will specify the
number of occurences of this string type in your full system. |
|
|
You should also mention the
number of inverters concerned
by this kind of strings (as a first guess, this may be
eventually modified by the system afterwards, see below). |
|
|
As an example: if you want to
define 3 "physical" inverters with 2 different kinds of strings on
each one (for example Sub-array#1 = 18 and Sub-array#2 = 20
optimizers): defining |
Sub-array#1 : 6 strings of 18 optimizers, 3 concerned
inverters (i.e. 2 such strings per inverter) ,
Sub-array#2 : 3 strings of 20 optimizers, 3 concerned
inverters (i.e. one such string per inverter).
| - |
Then you push the button
"String
Configuration". Here you get a
list of "physical" inverters corresponding to your Sub-arrays
definitions. For each sub-array of a same Inverter model, PVsyst
will create inverters with reference to a given sub-array for each
string input. |
|
|
This is a proposition of PVsyst, taking the number
of concerned inverters you have specified in each sub-array into
account. |
| - |
Now for each inverter, you can
eventually modify the attribution of sub-arrays to each string
input. The sub-array may be shown either as "names", or as number
of optimizers / orientation. |
| - |
When modifying sub-arrays
attribution, this list will become incompatible with the choices
you have done in the sub-arrays: an orange warning may appear,
requiring that you push the button "Adjust sub-arrays" for updating the
number of concerned inverters in each sub-array. |
| - |
During this automatic
construction, you can specify the maximum number of strings on each
inverter. The construction will also take the maximum allowed
PNomRatio for this inverter (usually 1.35 for normal inverters, and
1.55 for HD-wave technology). |
| - |
If desired, you can reinitialize
the inverter list, using these specified constraints: maximum
number of strings on each inverter input, Maximum PNom Ratio for
passing to the next inverter. |
| - |
You can manually add or delete
inverters (right-click on the sub-array ComboBoxes). |
