MPPT control strategy based on CVT and variable step hysteresis comparison method

Aiming at the contradiction between the speed and precision of traditional photovoltaic MPPT (maximum power point tracking) algorithm, an algorithm based on CVT (constant voltage tracking) and variable step size hysteresis comparison method is proposed. It avoids the problem of false judgment which is easy to appear in the perturbation and observation method, and the oscillation in the vicinity of the maximum power point is suppressed, and the steady-state accuracy of the conventional hysteresis comparison method is improved. Based on MATLAB/SIMULINK simulation platform, MPPT simulation model based on this algorithm is built. The simulation results show that the algorithm obviously improves the tracking speed and precision, and when the environment changes, the system can quickly and accurately track the maximum power point, the conversion efficiency of the photovoltaic power generation system has been improved.