基于周期扫描的太阳能控制器MPPT方法实现

Implementation of MPPT with Periodically Scanning Algorithm in Solar Controller

经典的最大功率点跟踪(MPPT)算法会由于外部环境的变化或系统本身采样的误差而无法快速地达到最优点。本文提出了一种基于周期扫描的MPPT算法,当系统启动、检测到外部环境发生变化或间隔一定周期时,重新对特定的占空比进行扫描,以快速、准确的确定新的最大功率点。控制器采用同步降压斩波的拓扑结构,降低了系统的功耗。并采用软启动技术,减小了启动电流的冲击。

Classical MPPT algorithm may fail to track maximum power point（MPP）timely when environment changing or sampling error appearing. A new MPPT Algorithm was introduce to track the maximum power point fast and accurately, with which the system will scan specific duty ratio at startup, environment change detected or setting time coming. Synchronous buck was used to reduce power dissipation. Soft starting was used to reduce impact at startup.