This dataset represents the power generation of centralized photovoltaic power plants in a specific region in 2021. Centralized photovoltaic power plants are constructed on sites such as deserts, Gobi, mountainsides, and water surfaces. The electricity generated is directly fed into the public grid, and tied into high-voltage transmission systems, with distribution managed uniformly by the grid for power supply to users. The grid connection voltage is commonly 35 kV or 110 kV. The centralized photovoltaic power generation mentioned here typically uses the bifacial and monofacial crystalline silicon-type module installed on open ground. The electricity output of different modules was adjusted according to the first-year utilization hours and the module lifespan based on the local conditions for fixed photovoltaic power generation. The lifespan of photovoltaic power generation modules was set according to official standards: the technical service life of monofacial modules was 25 years, and that of bifacial modules was 30 years.