Large centralized photovoltaic inverter has the advantages of large output power, simple operation and maintenance, mature technology, high power quality and low cost, and is usually suitable for large ground photovoltaic power stations, agricultural and optical complementary photovoltaic power stations, surface photovoltaic power stations, etc. At the same time, due to its large output power and high voltage level, it has begun to integrate with downstream transformers in recent years with the progress of technology, forming an integrated solution of "inverter voltage boost" and an integrated solution of optical storage combined with energy storage.