Power conversion device and photovoltaic module including the same

A photovoltaic module, comprising:

• a solar cell module including a plurality of solar cells;
• and
• a power conversion device,
• wherein the power conversion device includes:
• a full-bridge switching unit including first to fourth switching elements,
• a first transformer having an input terminal connected between the first switching element and the second switching element in the full-bridge switching unit and an output terminal connected between the third switching element and the fourth switching element in the full-bridge switching unit, wherein the first switching element is serially connected to the second switching element, and the third switching element is serially connected to the fourth switching element,
• a second transformer connected to the full-bridge switching unit as a half-bridge,
• a boost capacitor connected between a commonly connected terminal of the second switching element and the fourth switching element, and a ground terminal,
• a first inductor connected between a point connected between the third switching element and the fourth switching element, and an input terminal of the second transformer;
• a blocking capacitor connected between a point connected between the first switching element and the second switching element, and an input terminal of the second transformer;
• and
• a second inductor connected between the first inductor and the blocking capacitor, and parallelly connected to the input terminals of the second transformer,
• wherein the full-bridge switching unit converts a first direct current (DC) power input to the first transformer into a first alternating current (AC) waveform, based on variable duty switching, and
• wherein the first transformer includes a coupled inductor.