PV floating photovoltaic power plants on water

02-03-2021

PV floating photovoltaic power plants on water


Floating photovoltaic power plants on water refer to photovoltaic power plants built in waters such as ponds, small lakes, reservoirs, coal mining subsidence areas, barrier lakes, etc., to solve the problem of large area of traditional photovoltaic power generation. Floating photovoltaic power plants generate 11% more electricity than ground or rooftop power stations in the same area, and their project internal rate of return is higher than that of ground or rooftop power stations. It is estimated that in the next few years, the total installed capacity of floating floating photovoltaic power plants in my country will reach more than 3GW.


Floating photovoltaics mainly have the following advantages:


①Saving land use: it is built on the water surface and does not occupy land resources, which can reduce the cost of land acquisition.


②Increase power generation: The water body has a cooling effect on photovoltaic modules, which can inhibit the surface temperature of the modules from rising, so as to obtain higher power generation. According to the experimental comparative analysis of large-scale floating photovoltaic power plants in Hyogo Prefecture, Japan, due to the cooling effect of the water surface, the power generation of the solar panels has increased by about 11%


③Reduce evaporation and algae reproduction: Covering solar panels on the water surface can theoretically reduce evaporation on the water surface and inhibit algae reproduction in the water, which is beneficial to the protection of water resources.


④Convenient operation and maintenance: The photovoltaic power station is built in the water, which can reduce the pollution of the components by dust and facilitate the cleaning of the components. At the same time, it is difficult for people and animals to access the components, which can effectively prevent the damage of the components by people and animals.


⑤ Tourism benefits: The neatly arranged photovoltaic modules on the vast water surface can be used as a characteristic scenic spot, becoming a landscape in the area, and bringing tourism benefits.


⑥ Avoid module shading: Compared with land, the water surface is relatively open, which can effectively avoid the shading of modules by mountains, woods, etc. The solar radiation area is uniform and the illumination time is long.


⑦Reduce the cost of the tracking system: The component angle and spacing are consistent, which is convenient for the installation and operation of the solar tracking system. It is not necessary to install a dual-axis tracking system for each battery panel, which greatly reduces the cost of the tracking system.


⑧ Cost saving: No component foundation and bracket are needed, which saves the cost of foundation and bracket and saves costs.


⑨Easy to dissipate: It is built in the waters close to villages and cities, and it can be dissipated nearby, reducing the disadvantages of grid connection and power curtailment, and improving efficiency.




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