Roof distributed photovoltaic power generation refers to the photovoltaic power generation facilities on the roof of the user's building, whose operation mode is characterized by the user's self-use, excess electricity online, and balanced adjustment in the distribution system. Roof distributed photovoltaic power generation is a new type of power generation and comprehensive utilization of energy with broad development prospects. It advocates the principle of nearby power generation, nearby grid-connection, nearby conversion and nearby use, which can not only effectively improve the power generation of photovoltaic power stations of the same scale, but also effectively solve the problem of power loss in voltage boost and long-distance transportation.