关键词: MPPT, 扰动观测法, System Generator

Abstract:

Aiming at the problems that tracking speed and precision are not ideal in the traditional MPPT algorithm,the output characteristics of PV cells under different environment were analyzed,and an improved variable step size perturbation method is proposed.The algorithm use the new adaptive step size formal as the disturbance step length.It makes the photovoltaic cells in large steps to quickly approach the maximum power point, and then in a smaller step to stabilize the maximum power point.Finally,the simulations are carried out under the SG / Simulink hybrid modeling and simulation platform. The results show that the algorithm can significantly improve the maximum power point tracking speed and accuracy.

Key words: MPPT；disturbance observer method；System Generator