ABB PVI-3.0-TL-OUTD-S-US, Руководство по эксплуатации продукта

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3007CC3
3 - Mounting and wiring
I
ndependent or parallel configuration of inputs
The inverters have dual inputs with independent maximum power point tracking (MPPT)
control. When operated in the dual input mode, the inverter can optimize two independent
arrays. Each of the inputs is dedicated to a separate array with independent maximum power
point tracking (MPPT) control. This means that the two arrays can be installed with different
positions and orientation. Each array is controlled by an independent MPPT control circuit.
The two trackers can also be configured in parallel to handle power and/or current levels
higher than those a single tracker can handle.
Dual MPPT configuration – independent mode
The dual MPPT structure allows the
management of two photovoltaic
arrays that are independent of each
other (one for each input channel). In
the independent mode, the arrays can
differ from each other in installation
conditions, type and number of
photovoltaic modules connected in
series.
Single MPPT configuration – parallel mode
In the parallel mode, the two channels are connected in parallel and strings of photovoltaic
modules having the same type and number of modules in series can be connected in parallel
to the single channel. All strings must be identical and oriented to the same sun azimuth.
It is necessary to parallel the two
inputs when:
• the current from the photovoltaic
array exceeds 20Adc for the
3.6kW, 3.8kW, 4.2kW inverter and
12.5Adc for the 3.0kW inverter,
• or the array power exceeds the
limit for the single channel (see
Appendix section 7,
• or when there is a consistent
unbalance of power between two
arrays.
The inverter is set in independent mode at the factory by default. The following sections
describe how to connect the inverter in parallel mode.