Improved MPPT Control Strategy Based on Current Source Micro Inverter

Maximum power point tracking (MPPT) is one of the key technologies in photovoltaic power systems, aiming to improve system energy conversion efficiency. This article presents a study and improvement on the voltage-based MPPT control algorithm, and its effectiveness and feasibility are experimentally validated in current-mode micro-inverters. This algorithm adopts an optimization strategy combining segmented control and adaptive variable step size control technology to improve the tracking speed and accuracy of MPPT, in order to improve the energy conversion efficiency and stability of photovoltaic power generation systems. Experimental results demonstrate that the algorithm achieves rapid and accurate maximum power point tracking under different illumination and temperature conditions, significantly improving the overall system performance. Moreover, the algorithm exhibits strong robustness and adaptability, making it suitable for a wide range of photovoltaic power systems. With a rapid response to external environmental changes, the overall tracking efficiency of this method reaches 99.9%.