POWER MANAGEMENT APPARATUS AND METHOD OF CONTROLLING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a protection mechanism that enables switching the power generation system of the renewable energy to a grid-connection operation or a stand-alone operation when an abnormal condition is sensed in a power distribution path.

SOLUTION: A power management apparatus includes: a power conversion unit; a first sensing unit; a second sensing unit; a switch unit; and a control unit. The power conversion unit converts output power generated from at least one renewable energy generation apparatus. The first sensing unit is provided to sense a first current and a first voltage. The second sensing unit is provided to sense a second current and a second voltage. The control unit acquires an output power generated from the at least one renewable energy generation apparatus and acquires a feedback power to an AC utility according to the first and the second currents and the first and the second voltages when the control unit turns on the switch unit.

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