Floating Solar Panel Mounting System Overviews
Talking about the photovoltaic power station, the neat rows of photovoltaic panels on the vast Gobi Desert will be shown on the peoples head. There are a large amount of unused land and sufficient light constructed in these Qinghai, Xinjiang, Gansu and other provinces in western China.
The newly floating solar panel power station on the water, which uses floating abutments to float photovoltaic modules on the water surface to generate electricity. The characteristic is that it does not occupy land resources, and the water body has a cooling effect on the photovoltaic module, which can suppress the rise of the surface temperature of the module, thereby obtaining higher power generation. In addition, covering the water surface with solar panels can also reduce evaporation on the water surface, inhibit algae reproduction, and protect water resources.
I. Foreign Development Status of the floating solar panel power system
Japan is currently the country with the most practical application of floating photovoltaic power stations in the world. According to the statistics as of the end of 2014, 3.824MW has been connected to the grid. In 2015, about 15MW is expected to be connected to the grid. network.
“Tuanchuan Water Solar” Project
In June 2013, in Saitama Prefecture, Japan, the 1.18MW “Tubegawa Aquatic Solar” project invested by Japan West Holdings Group was completed and put into operation in a 30,000 square meter non-drinking water reservoir in Ogawa. The project anchored a raft-like abutment on the water surface occupying 43% (13,000 square meters) of the reservoir area. 4536 260W solar panels were laid on the abutment, and the photovoltaic panel was inclined at an angle of 12 °. Transformer.
Figure 1: Otsukawa floating photovoltaic power plant in Japan
The technology used in this project is a floating photovoltaic power generation system developed by the French company Tiandi. The photovoltaic power generation components are fixed on floating blocks. The floating blocks are made of high-density polyethylene. There are no metal parts. The project construction period is about 6 weeks, of which the floating system and photovoltaic module installation each takes 3 weeks. The sufficient water source of the reservoir and its surrounding rivers has a good cooling effect, and the power generation capacity can be increased by about 10% compared with the roof or ground photovoltaic power generation system.
This project cost 350 million yen (about 21.8 million yuan), and the electricity generated was acquired by Tokyo Electric Power Company based on the Japanese solar on-grid electricity price (37.8 yen / kWh, about 0.38 USD / kWh). 50 million yen.
Hyogo large-scale hydro photovoltaic power station
A large hydropower station in Japan’s Hyogo Prefecture, which was jointly invested and constructed by Kyocera Corporation of Japan and Tokyo Shengshili Leasing Co., Ltd., was put into operation at the end of March this year.
The approximately 1.7MW “Hyogo Takaoka West Water-Level Photovoltaic Power Plant” in Xipingchi, Kato City, Hyogo Prefecture, and the approximately 1.2MW “Hyogo Takaoka East Water Megawatt” in Dongping Pool Level photovoltaic power station. ” The total number of installations at the two power stations amounts to 11,256, with an estimated annual power generation of approximately 3.3 million kWh.
Figure 4: Hyogo Prefecture Floating Photovoltaic Power Station
Osaka floating photovoltaic power plant
The approximately 1 MW photovoltaic power plant “DREAMSolarFloat 1” constructed on the water surface of the pond “Pond Pond” in Kishiwada, Osaka Prefecture started construction on April 6 this year, completed on August 11, and began commercial operations. The power station began to sell electricity to Kansai Electric Power in full on August 10, 2015. This is the first hydro photovoltaic power station in Osaka Prefecture. The project investment is about 500 million yen. It is estimated that the annual power generation after operation will be about 1.18 million kWh and the annual electricity sales will be about 37.76 million yen.
The area of the reservoir is about 20,000 square meters, and 4016 260W solar panels float on the surface of about 10,000 square meters. The project uses floating body stands (resin members similar to wooden rows) to support solar panels. Each floating body stand is provided with a certain number of solar panels. First, the solar panels are installed on the floating stand on the ground and then transported to the storage by crane. Set on the water surface of the pool.
As early as 2011, British designer Phil Pauley proposed floating solar cells. Unlike current floating photovoltaic power stations, it is a mesh solar cell floating on the sea. Solar cells can be connected Together, it forms a huge network-like structure, and along with the buoyant boat floating on the water surface, it can also collect the generated wave energy.
In 2014, the first floating photovoltaic power station in the United Kingdom was completed in Berkshire. The floating power station is located at Sheeplands Farm near Vograve. It consists of 800 photovoltaic panels with a total installed capacity of 200kW. The project will cost a total of 250,000 pounds. The investment will be Gains in 6 years. In the next 20 years, farmer Mark Bennett will receive a subsidy of 20,500 pounds per year, and the farm will save 24,000 pounds of electricity each year.
Berkshire floating photovoltaic power plant
In 2012, researchers from the Norwegian Classification Society (DNV) introduced the concept of a so-called dynamic floating offshore solar farm. 4200 560W thin-film solar panels form a 2MW hexagonal solar array. By connecting multiple arrays together, a photovoltaic power station of 50MW or more can be formed.
The photovoltaic array is divided into several power generation areas. Each power generation area transfers the generated power to two main switches that collect power, and then boosts the voltage at a central transformer. The central island of this offshore solar farm is connected to a 30kV power transmission line. This transmission line connects a series of other solar islands to form a closed loop, and then continues to transmit power to the onshore substation for connection to the mains grid.
Figure 9: Floating photovoltaic array
From the development of foreign countries, we can see that the development models of floating photovoltaic power stations in various countries basically follow the model of enterprise-led, government support, and technology support. To several tens of hundreds of MW, Japan currently maintains the largest output record of floating power plants (about 13.4MW).
China is rich in water resources, and there are many lakes and reservoirs. The development of floating photovoltaic power stations on the water can relieve the constraints of land and broaden the application of photovoltaic power generation. At the same time, there are benefits of increasing power generation and protecting water resources. Large-scale, large-scale development is still a certain distance. The long-term reliability of components in humid environments, bearing capacity and service life of floating platforms need to be further verified. However, with the development of industry and technological progress, I believe that domestic More and more companies will begin to get involved in the development and utilization of floating photovoltaic power generation systems.