Maximum power point tracking method and maximum power point tracking system

摘要

A maximum power point tracking method includes: configuring a voltage tuning direction of a power converter (140) by a process circuit (160) such that the input voltage (Vdc) of the power converter changes in a positive or a negative trend; detecting the corresponding input voltage and input current (Idc) of the power converter sequentially to obtain multiple powers (P1-P6); and when the powers decrease for N times continuously, change the voltage tuning direction of the power converter such that the change of the input voltage switches from positive trend to negative trend, or from negative trend to positive trend, in which N is an integer greater than or equal to 2.