Power improved centralized inversion transformation photovoltaic power generation complete device

The utility model discloses a power improved centralized inversion transformation photovoltaic power generation complete device which comprises a photovoltaic power generation DC unit (1), a DC power distribution cabinet (2), a photovoltaic grid connected inverter (3), an auxiliary photovoltaic grid connected inverter (4), a double winding transformer (5), a device measurement and control instrument (6) and a radiation sensor (7). The photovoltaic grid connected inverter (3) is a centralized inverter, and the auxiliary photovoltaic grid connected inverter (4) is a string inverter. Power generation, monitoring and communication of the centralized inversion transformation photovoltaic power generation device are achieved, and efficiency and automation level of a photovoltaic power generation system are improved, thereby facilitating installation, debugging and operation maintenance. The photovoltaic grid connected inverter and the auxiliary photovoltaic grid connected inverter are cooperated, the auxiliary photovoltaic grid connected inverter is used under low light conditions, power generation efficiency is improved, and service lifetime is prolonged by shortening working time of the photovoltaic grid connected inverter. The device is equipped with a human-computer interaction module to fulfill functions of operation parameters and curves display and sound-light alarm and the like.