Single-stage non-isolated Buck-Boost three-phase photovoltaic inverter and control method thereof
A photovoltaic inverter, non-isolated technology, applied in the field of power electronics, can solve the problems of short life, no buck-boost function, low reliability, etc. Effect
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[0028] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0029] A single-stage non-isolated Buck-Boost three-phase photovoltaic inverter, such as figure 2 As shown, the inverter is composed of nine switch tubes, eight diodes, five inductors and three filter capacitors; the eighth switch tube S 8 The collector of the DC bus is connected to the "+" terminal, and the eighth switching tube S 8 The emitter of the seventh diode VD 7 The cathode, the first DC inductance L dc1 One end of the connection; the ninth switching tube S 9 The emitter of the DC bus is connected to the "-" terminal, and the ninth switching tube S 9 collector of the eighth diode VD 8 The anode of the second DC inductance L dc2 One end of the connection; the seventh diode VD 7 The anode of the eighth diode VD 8 The cathode connection; th...
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