Direct current anti-reverse protection circuit and photovoltaic inverter

Abstract

The utility model is suitable for photovoltaic technical field provides direct current anti -reversal protection circuit and photovoltaic inverter, direct current anti -reversal protection circuit includes n switch protection unit, at least one anti -reversal isolation unit and bus capacitor, n switch protection unit's input one -one correspondence is connected to n current box, and n switch protection unit's output is connected to the same positive confluence node, the positive pole end of bus capacitor is connected to the positive confluence node, and the negative pole end of bus capacitor is connected to the same negative confluence node, and bus capacitor is connected in parallel in the direct current side of inverter circuit, wherein, anti -reversal isolation unit sets up between each switch protection unit's output and the positive confluence node, or set up between the positive confluence node and the positive pole end of bus capacitor, the utility model discloses technical scheme, can solve the problem that the branch current mutual irrigation and the alternating current energy backflow of the branch short circuit in photovoltaic inverter cause the trouble spread and the equipment is burnt down.

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