Quasi-Z-source inverter based single-phase photovoltaic off-grid inverter and soft switch control method thereof
A source inverter, inverter technology, applied in the field of new energy photovoltaic power generation, can solve problems such as large switching loss
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[0047] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0048] see figure 1 , a single-phase photovoltaic off-grid inverter based on a quasi-Z source inverter, whose circuit topology consists of a quasi-Z source inverter, a high-frequency transformer, a single-phase full-bridge diode rectifier circuit and a LC filter connected in sequence Composed of single-phase full-bridge inverter circuit.
[0049] The quasi-Z source inverter consists of a DC input voltage V in , its anode and inductance L 1 connected at one end, the inductance L 1 The other end of the capacitor C 2 cathode and diode D 1 The anode connection of the diode D 1 The cathode and the inductance L 2 connected at one end, the inductance L 2 The other end of the capacitor C 2 The positive connection of the diode D 1 The cathode is also connected with the capacitor C 1 The positive connection of the capacitor C 1 The negative...
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