Abstract: To alleviate the current land shortage in the Beijing-Tianjin-Hebei region and raise its energy development rates for urban agglomerations, this article examines the potential development of floating photovoltaic in its lakes and reservoirs. We take the Miyun reservoir as an example, and extend it to the whole study region. By constructing a floating photovoltaic power generation model and combining it with relevant meteorological data for simulation, we draw conclusions below. First, when this model is implemented in Miyun Reservoir, the simulated photovoltaic power generation varies in a year in the same trend as temperature and radiation, and the model has universality in the study region. Second, when 5% of the lake and reservoir area is used to develop floating photovoltaic in the study region, its simulated annual power generation reaches 5.07×109 kW·h, roughly 20% of its total photovoltaic output at present, showing there exists a great potential for future development. Third, construction of floating photovoltaics in this study region can reduce annual emissions of 2.8857 million tons of carbon dioxide, save 624 thousand tons of standard coal and 3.1939 million cubic meters of water, and reduce water resource waste caused by evaporation on large lakes and reservoirs. For the Beijing-Tianjin-Hebei region, floating photovoltaic power stations can improve the utilization rate of its idle water bodies, alleviate its energy pressure and water resource shortage in highly developed urban agglomerations, promote its development of photovoltaic energy, thus supporting the new idea for developing photovoltaic energy in the region.

Key words: floating photovoltaics, Beijing-Tianjin-Hebei region, photovoltaic power generation model, carbon reduction, power generation forecast