STEVAL-ISV009V1 STMicroelectronics, STEVAL-ISV009V1 Datasheet - Page 7

• Manufacturer Part Number: STEVAL-ISV009V1
• Description: Power Management Modules & Development Tools DUAL STG DC/AC CNVRT DEMO BRD
• Manufacturer: STMicroelectronics
• Series: -r

Specifications of STEVAL-ISV009V1

• Design Resources: STEVAL-ISV009V1 BOM STEVAL-ISV009V1 Schematic
• Main Purpose: DC/DC, Step Up
• Outputs And Type: 1, Non-Isolated
• Power - Output: -
• Voltage - Output: 36V
• Current - Output: -
• Voltage - Input: -
• Regulator Topology: Boost
• Frequency - Switching: -
• Board Type: Fully Populated
• Utilized Ic / Part: SPV1020
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AN3392
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A limitation of the architecture in
when the PV field is irradiated uniformly.
A first evolution of the above architecture is the following one (string-distributed), where the
inverter includes more DC/DC converter sub-blocks implementing its own MPPT control:
Figure 3.
Even if this architecture faces the different shadow on the strings, it doesn’t solve the
problem of the partial shading on each panel.
A real solution to this matter is to place the DC/DC and related MPPT control on each panel.
This approach implies the inverter architecture simplification that doesn’t require anymore
the DC/DC block and related controller.
Furthermore, in order to minimize the impact of partially shading on each panel, it’s possible
to force the concept having a DC/DC for each cell of the panel. As compromise between
costs and performance the following approach could be followed, where a panel is split into
3 different sub-strings:
Anti-island control, a safety control forcing the system disconnection from the grid
when this is off for maintenance.
Inverter control, for transforming the DC power generated by the system in the AC
power compatible (in terms of voltage and current amplitude, frequency and phase)
with the power on the public grid.
The MPPT (Maximum Power Point Tracking) control, allowing extracting the maximum
power as possible from the PV field in order to maximize the power sourced to the grid.
Photovoltaic system with multi-string inverter
Doc ID XXXXX Rev 1
Figure 2
is that the MPPT control performs properly just
Application overview
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