Hexagonal solid-state transformer topology, control method and device

The invention discloses a hexagonal solid-state transformer topology and a control method and device.The topology comprises a hexagonal converter, a medium-voltage direct-current port and an alternating-current port, and the hexagonal converter comprises a first main bridge arm and a second main bridge arm which are connected in parallel; the first main bridge arm comprises three sub-bridge arms which are connected in series; the second main bridge arm comprises three sub-bridge arms which are connected in series; the medium-voltage direct-current port is connected with a parallel connection point between the first main bridge arm and the second main bridge arm; and the alternating current port is formed by pairing the series connection points between the sub-bridge arms in pairs. By adopting the technical scheme, the energy of the high-voltage side is introduced into the high-frequency converter through the high-frequency circulation path in the form of high-frequency power and is transmitted to the low-volt