3-8
Figure 39. Finished array tree for a utility PV field.
The process of creating your tree has two parts. First, use the Symmetrical Tree Builder
screen (shown in Figure 40) to create the basic structure of the tree. If it is a large utility-
scale project, the design is likely to be modular, and in this first screen you will describe
that modular, ‘symmetric’ structure that repeats again and again across the field. The
second part of the process is to use the Array Navigator screen, which appears when you
click
OK
on the Tree Builder, to customizations your tree.
Using the Symmetrical Tree Builder
The Symmetrical Tree Builder opens with a default system tree, shown in Figure 40.
Figure 40. The default system tree in the Symmetrical Tree Builder.
Edit the tree so that it matches the design of your PV field. You can change any of the
following:
•
Number of layers in the tree.
•
Names of the layers
•
The quantity in each layer
•
Represent items by number or alphabetically
•
Number of modules in each string.
To add a layer to the tree, highlight the next highest layer and select
Add Layer Below
.
To delete a layer, just highlight the layer and select
Delete
. A layer can be an inverter, a
group, a combiner, or a string. Add a ‘combiner’ layer to represent anything that
combines electrical circuits (re-combiner, combiner, or harness wiring to which strings
are wired in parallel out in the array. Use ‘group’ layers to represent other organizational
levels: blocks, parking lots, skids, pads, tracking motor groups, and so on.
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