The voltage level of the split transformer is 35kV, and the inverter module and booster module are integrated to directly invert and boost the DC power generated by the photovoltaic modules to a voltage level of 35kV, and then merge into the photovoltaic booster box transformer of the grid. The box layout is divided into high-voltage room, transformer room and inverter room. It integrates the latest design concept of civil power. The overall structure is compact, the function is complete, the box body has strong anti-corrosion ability, good environmental adaptability, and on-site installation is simple, only need prefabricated foundation. , greatly improving the field work efficiency.