INVERTING APPARATUS AND CONTROL METHOD THEREOF

摘要

An inverting apparatus and a control method thereof are provided. The inverting apparatus includes an inverting circuit, a detection circuit, and a control circuit. The inverting circuit converts a DC input power into an AC output power. The detection circuit detects an input voltage and an input current. The control circuit provides a control signal for disturbing the input voltage, such that a voltage value of the input voltage is adjusted to a command voltage represented by the control signal. The control circuit calculates an input power corresponding to each of time points, calculates a power variation between the disturbed power and the undisturbed power, then determines whether the power variation is larger than a predetermined variation, and sets a disturbance voltage according to the determination result, based on an MPPT operation or based on a disturbance direction of the command voltage of the previous time point.

主权项

1. An inverting apparatus, comprising:
an inverting circuit, receiving a direct current (DC) input power, and converting the DC input power into an alternating current (AC) output power; a detection circuit, detecting an input voltage and an input current of the DC input power under a plurality of time points; and a control circuit, coupled to the inverting circuit and the detection circuit, and providing a control signal for controlling the inverting circuit to disturb the input voltage, so as to adjust a voltage value of the input voltage to a command voltage represented by the control signal, wherein the control circuit calculates an input power corresponding to each of the time points according to the input voltage and the input current, calculates a power variation between the disturbed input power and the undisturbed input power, determines whether the power variation is greater than a predetermined variation, and sets a disturbance quantity based on a maximum power point tracking operation or sets the disturbance quantity according to a disturbance direction of the command voltage of the previous time point.