New photovoltaic power generation demonstration power station in Erdos trial operation

The “diamond”-shaped photovoltaic cells are shining in the sun, can track the sunlight like sunflowers, and continuously output current... One installation of 1344 sets of new multi-light concentrating tracking photovoltaic power generation units with an installed capacity of 205 kW The desert demonstration power station was built and put into trial operation in Erdos City, Inner Mongolia.

The new photovoltaic power generation unit was developed by Chen Yingtian, a professor of the University of Science and Technology of China, and a researcher of the Institute of Theoretical Physics of the Chinese Academy of Sciences, and his team passed the expert appraisal in October 2006. Each "diamond" on a photovoltaic panel consists of a light funnel surrounded by an octahedral mirror and a conventional monocrystalline silicon photovoltaic cell. Under the control of a single integrated circuit, the optical funnel can not only automatically track and absorb sunlight, but also concentrate the sunlight on the bottom silicon photovoltaic cell, which improves the utilization efficiency of the photovoltaic cell.

According to reports, to build a photovoltaic power plant with a peak power of 4.4 kW, the traditional flat-panel photovoltaic power generation technology requires 1944 ordinary photovoltaic cells of 125mm × 125mm specifications, while the new digital concentrating tracking photovoltaic power generation technology only needs 720. sheet.

“The concentrating tracking technology can use a piece of photovoltaic cell as a few pieces, which not only reduces the cost of solar power generation, but also is of great significance for energy saving and emission reduction and environmental pollution reduction,” Chen Yingtian said.

The production of 1 ton of silicon photovoltaic cell raw materials consumes 300,000 to 500,000 kWh of electricity. One piece of photovoltaic cell generates only 3 to 4 times of the electricity consumed during the life of the photovoltaic cell. Light technology can increase this ratio by more than 10 times."

At the same time, the new photovoltaic power generation technology eliminates the "heat island effect" that the flat panel photovoltaic battery group cannot avoid, and prolongs the service life of the battery board; two years of field practice proves that it also has the characteristics of sand and impact resistance.

The desert demonstration power station in Inner Mongolia covers an area of about 30 mu and was approved by the National Development and Reform Commission. It was built by Inner Mongolia Yitai Coal Group. Among them, 200 kW uses several times of concentrating tracking photovoltaic power generation system, and 5 kW uses traditional flat-panel photovoltaic power generation system for comparison.

“The new photovoltaic power plant equipment has invested 9 million yuan, which is 75% of the cost of traditional flat-panel photovoltaic power plants of the same scale; the annual power generation is conservatively estimated at 240,000 degrees, which is 3 to 4 times the annual power generation of flat panel components of the same photovoltaic cell area.” Chen Yingtian The introduction said.

Solar photovoltaic power generation is the use of semiconductor devices to convert solar energy into electrical energy, which is characterized by cleanness, environmental protection, inexhaustible use and inexhaustible use.

“The multiples of concentrated light-tracking photovoltaic power generation technology in the place where the solar resources are better, the higher the design multiple.” Chen Yingtian said, “But in areas where solar resources are not abundant or areas with poor air quality, flat-panel photovoltaics The battery still has an irreplaceable role."