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 and a DC/DC converter connected to the solar battery. The device includes a sampling module configured to detect output current and voltage values of the solar battery. A controlling module 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 and the target current value. The device also includes a driving module configured to receive the controlling signal from the controlling module and output a driving signal to adjust a output current value of the DC/DC converter to close to the target current value and adjust an output power of the DC/DC converter.

主权项

1. A maximum-power-point tracking device for a solar electric-generation system that includes a solar battery and a DC/DC converter, the maximum-power-point tracking device comprising:
a sampling module configured to detect an output current and an output voltage of the solar battery; a controlling module configured to:
determine a target current value according to an initial target current value and a preset current difference value;determine a value of an input current and a value of an output current of a proportional-integral adjustment according to the output current of the solar battery and the target current value;determine a duty cycle according to the output current of the proportional-integral adjustment; andoutput a controlling signal for controlling the output current of the solar battery according to the duty cycle; and a driving module configured to:
receive the controlling signal from the controlling module; andoutput a driving signal to adjust the output current of the solar battery to the target current value according to the controlling signal.