A maximum-power-point tracking device for a solar electric-generation system and a tracking method for the same

摘要

A maximum-power-point tracking device is provided for a solar electric-generation system that includes a solar battery (101) and a DC/DC converter (102) connected to the solar battery (101). The device includes a sampling module (103) configured to detect output current and voltage values of the solar battery (101). A controlling module (105) is configured to calculate a target current value according to the output current and voltage values and a preset current value, and output a controlling signal for controlling the value of a current according to the output current of the solar battery (101) and the target current value. The device also includes a driving module (104) configured to receive the controlling signal from the controlling module (105) and output a driving signal to adjust a output current value of the DC/DC converter (102) close to the target current value and adjust an output power of the DC/DC converter (102).