Disclosed is a single-stage three-phase high-gain boost type three-port integrated inverter, belonging to the power electronic conversion technology. The inverter consists of an energy storage inductor with a center tap, a three-phase inverter bridge, and a three-phase filter, wherein same are in cascade connection in sequence. A drain and a source of an energy storage switch are respectively connected to the center tap of the energy storage inductor and a negative polarity terminal of an input direct-current source, and an accumulator charge/discharge switch unit is connected between the input direct-current source, a positive polarity terminal of an accumulator, and the two terminals of the energy storage inductor with the center tap. The inverter has three ports, i.e. input, output and energy storage ports. There are three modes, i.e. an input source supplying power to an output load and the accumulator, the input source and the accumulator supplying power to the output load, and the accumulator supplying power to a load. The inverter can invert an input DC source voltage or an accumulator single-stage high-gain boost voltage into a stable and high-quality three-phase sinusoidal alternating current.
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