Three-phase alternating current power supply parallel system based on split-phase energy storage inverter

The invention discloses a three-phase alternating current power supply parallel system based on a split-phase energy storage inverter, which relates to the field of split-phase energy storage inverters, and is characterized in that a second phase line of a host is connected with a first phase line of a slave, and the output of the second phase line in the host is controlled to be lagged behind the output of the first phase line by a first preset degree; the output of the first phase line in the slave is controlled to be lagged by a first preset degree than the output of the first phase line in the host, so that the time sequence output time of the first phase line in the slave is overlapped with the time sequence output time of the second phase line in the host; therefore, the overlapping output of the second phase line in the host and the first phase line in the slave is equivalent to the second phase output in the three-phase current, and the line voltage between the first phase output and the second phase