Study of Maximum Power Point Tracking (MPPT) Method Based on Adaptive Control Theory

摘要

The output power of photovoltaic cell array was affected by light intensity and temperature changes, so the maximum power point tracking (MPPT) technology is used in photovoltaic systems widely. This paper presents an adaptive duty cycle interference Observation MPPT method for photovoltaic power systems and its simulation. The results show that: under the control of the improved method, which can track the maximum power point of photovoltaic array steadily and effectively, in the same time, in the case of sunlight intensity, ambient temperature and other system parameter perturbations, it can find new work points quickly and keep the system steadily. The method shows good dynamic characteristics.