| Abstract: | PV power production is highly dependent on environmental and weather conditions, such as solar irradiance and
ambient temperature. Because of the single control condition and any change in the external environment, the first
step response of the converter duty cycle of the traditional MPPT incremental conductance algorithm is not
accurate, resulting in misjudgment. To improve the efficiency and economy of PV systems, an improved
incremental conductance algorithm of MPPT control strategy is proposed. From the traditional incremental
conductance algorithm, this algorithm is simple in structure and can discriminate the instantaneous increment of
current, voltage and power when the external environment changes, and so can improve tracking efficiency.
MATLAB simulations are carried out under rapidly changing solar radiation level, and the results of the improved
and conventional incremental conductance algorithm are compared. The results show that the proposed algorithm
can effectively identify the misjudgment and avoid its occurrence. It not only optimizes the system, but also
improves the efficiency, response speed and tracking efficiency of the PV system, thus ensuring the stable
operation of the power grid. |
