The invention discloses a
photovoltaic inverter topology circuit and a control method thereof. The
photovoltaic inverter topology circuit comprises a plurality of operational amplifiers, a plurality of MOS tubes, a plurality of resistors, a plurality of connectors, a plurality of capacitors and a plurality of diodes, the in-phase end of an
operational amplifier U1 in the operational amplifiers is connected with one end of a
resistor R2, the source
electrode of an MOS tube Q2, the anti-phase end of the
operational amplifier U1 in the operational amplifiers is connected with one end of a
resistor R3, the source
electrode of an MOS tube Q1, and the output end of the
operational amplifier U1 in the operational amplifiers is connected with the other end of the
resistor R3; the in-phase end of the operational
amplifier U5 is connected with the
cathode of the
diode D4, the anti-phase end is connected with the in-phase end of the operational
amplifier U6, the
cathode of the
diode D2 and one end of the
capacitor C1, and the output end is connected with the
anode of the
diode D2; the inverting end of the operational
amplifier U6 is connected with the output end and one end of the resistor R1; the grid
electrode of the MOS tube Q1 is connected with the grid electrode of the MOS tube Q2, and the drain electrode is connected with one end of the resistor R4 The drain electrode of the MOS tube Q2 is connected with the other end of the resistor R1; the
anode of the diode D4 is connected with the P1 end of the connector; the other end of the resistor R4 is connected with the P2 end of the connector; the other end of the
capacitor C1 and the other end of the resistor R2 are grounded.