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- 2015-09-05
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Description: maximum-power-pointtracking
(MPPT) method focused on low-power (< 1 W) photovoltaic
(PV) panels. The static and dynamic performance is
theoretically analyzed, and design criteria are provided. A prototype
was implemented with a 500-mW PV panel, a commercial
boost converter, and low-power components for the MPPT
controller. Laboratory measurements were performed to assess
the effectiveness of the proposed method. Tracking efficiency was
higher than 99.6 . The overall efficiency was higher than 92 for
a PV panel power higher than 100 mW. This is, in part, feasible
due to the low power consumption of the MPPT controller, which
was kept lower than 350 μW. The time response of the tracking
circuit was tested to be around 1 s. Field measurements showed
energy gains higher than 10.3 with respect to a direct-coupled
solution for an ambient temperature of 26 ◦ C. Higher gains are
expected for lower temperatures.
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