Research on MPPT Technique in Photovoltaic Power Generation System

Maximum power point tracking (MPPT) is the core technique in photovoltaic power generaton system to improve energy utilization. Major research direciotns of MPPT are focused on model pattern and input-output paramerters pattern. This paper introduces the superiority and inferiority for MPPT in two kind of patterns. Morever, a new MPPT method in model pattern base on ant colony optimization algorithm(ACO) and an optimized fuzzy tracking method in input-output paramerters pattern are also proposed, which are proved to tracking the maximum power point (MPP)effectively from experimental results. Finally, combined with advantages of the above tracking methods, a set of integral tracking strategy is put forward to accurately and timely track MPP under different conditions.