Adaptive voltage control of the dcdc boost stage in pv converters with small input capacitor
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The document discusses an adaptive voltage control method for the DC/DC boost stage in photovoltaic converters that allows for a smaller input capacitor. Traditionally, PV systems use a large input capacitor for adequate voltage regulation to maximize power from the solar array. However, with a smaller capacitor the nonlinear characteristics of the PV array cause the voltage regulation performance to highly depend on the operating point. The paper analyzes these nonlinearities, proposes an adaptive control based on linearizing around the operating point, and validates the control through experiments on a commercial converter with a 40 μF capacitor connected to a 4 kW solar array.
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