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.