An estimated photocurrent controlling the inductance current of DC-DC converter for rapid MPPT pursuit with less oscillations under sudden changes in the PV chain

估算光电流以控制DC-DC转换器的电感电流,从而在光伏链突变的情况下实现快速最大功率点跟踪,并减少振荡。

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Abstract

This paper focuses on simple technique from conventional techniques for the rapid maximum power point (MPP) pursuit with a less oscillations under sudden changes. In investigations, the controllability of the conventional boost converter model shows that the converter can be controlled from the current of its inductance (inductor). To get reference current, a conventional technique known as method of short-circuit current has been transformed to clearly establish with supporting evidence an estimated photocurrent. Different test was done on MATLAB/Simulink under irradiance, temperature and load changes. Facing the P&O and short-circuit method, the proposed method presents a response time of 11.08 ms and power variations at MPP around 0.1 Watts. A test made on another converter shows that this method can be applied on DC-DC converters where the inductor current need to be controlled for proper operation.

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