Power control device

A power control device which controls power inputted from a solar cell panel and determines that an abnormality has occurred, on the basis of voltage, current, or power inputted from the solar cell panel, the power control device comprising:

• a power conversion section which converts and outputs the voltage inputted from the solar cell panel;
• a control section which performs tracking control for the power conversion section after performing search control for the power conversion section;
• and
• an abnormality determination section which determines that an abnormality has occurred,
• wherein voltage or current on one side of the power conversion section, the one side being an input side or an output side of the power conversion section, is used as an adjustment target in the search control, and the search control changes the adjustment target stepwise by a prescribed width in each of steps, and detects, as a maximum power, a power which is the maximum among powers on the one side in the steps,
• wherein the tracking control causes the power on the one side of the power conversion section to follow the maximum power detected by the search control, and
• wherein, in the tracking control, the abnormality determination section changes a change target, which is one of voltage, current, and power on the input side of the power conversion section, in a prescribed target period such that the change target increases and decreases between two values set beforehand and determines that an abnormality has occurred, on the basis of a change of the change target in the target period.