Research on Improved Disturbance Observation Method for Photovoltaic MPPT Control

For the purpose of addressing the issue that the maximum power point tracking (MPPT) perturbation method of observation cannot realize both speed and accuracy, an improved perturbation observation method based on duty cycle is proposed in this paper, which tracks the maximum power point more quickly and accurately through the optimization of step size. It is minutely introduced the principle and implementation process of the revised algorithm and the viability of the proposed method can be seen from the simulation results. The improved disturbance observation method based on duty cycle can obviously have higher tracking accuracy than the traditional disturbance observation method on the basis of ensuring the tracking speed of the maximum power point, and can play a better role in ensuring the stability, accuracy and rapidity of the system, and achieve better results.