Ultra-large-scale Solar Photovoltaic Power Generation
Author: Source: Datetime: 2016-09-20 15:22:25
Ultra-large-scale photovoltaic power generation (VLS-PV) - generally refers to a few megawatts or even more than 10MWP photovoltaic power stations. Ultra-large-scale solar power generation is also the International Energy Agency (IEA) in item 8 Task,the main research, technology and information to track large scale photovoltaic power generation, and to carry out exchanges and international cooperation. VLS-PV refers to the above solar power generator system, generally refers to the desert PV power plant. Currently the world have been built 26.5MWP desert power plants 15, is preparing the construction of desert power plants have 1020. Wherein using the master/slave/slave network of large-scale photovoltaic inverter system working mode is best suited for large-scale desert electric station. This mode enables the efficiency of the photovoltaic power plants to optimize and improve the reliability of the photovoltaic power plant and real versatility. Since the turn as the main inverter, making the whole system inverter life extended by 20%-30%, greatly reducing the life cycle cost.
For large-scale grid-connected PV systems, solar cell modules in series voltage is generally up to 700-1000V (DC), this requires pressure value to more than l000V solar modules (DC). In addition, the entire system of the lightning protection system, grounding system monitoring, there are more difficult to pronounce pre Gao, more stringent requirements, we are worth exploring in depth. Use of solar energy, especially solar photovoltaic power generation in the world has been a high priority. Our country in the use of solar thermal in the forefront of the world, is the largest producer of solar water heaters, solar water heaters is also the largest consumer market. Western countries, such as Germany, the United States and Japan to vigorously developing the PV industry, solar cell research, and industrial applications has made remarkable progress in the world in terms of the development of renewable energy set a good example. Our in photovoltaic research and industries to catch up, also made rapid progress in 2004 on the industrial scale solar cells for the first time more than India.
World solar cell has maintained Gao speed development, mainly Germany and Japan, two countries adopted a series of measures in the photovoltaic utilization, through the promotion of policies to achieve good results. In 2004 the total world production of solar cells 1256MW, while Japan accounted for nearly half of production, Europe accounted for nearly one-third. Table 7-2 shows, China's solar cell production in 2003, less than half of India's output, by 2004, India has exceeded capacity of 15MW children, this is a very great thing. However, the proportion of point of view, China's solar cell in 2004 accounted for only about 4% of world production, so China should accelerate the pace of industrial development in the solar cell.
From the terms of the types of solar cells, silicon solar cells dominate, particularly crystalline silicon solar cell. Plus monocrystalline silicon, polycrystalline silicon and silicon cells with 2004, the proportion of crystalline silicon cells more than 94% of amorphous silicon cells from 12% in 1999 down to 20 (M 4 percent. The other two thin film cell development is also very slow, and it was felt thin film solar cells are currently no opportunities, lead to some thin film solar cell production plant shutdown or some dramatic changes in the development of thought-provoking, polycrystalline silicon cells is generally believed that the proportion will more and more, but in 2004 monocrystalline silicon solar cells has risen, while the polysilicon cell ratio decreased primarily due to limited sources of polysilicon materials, in addition to silicon solar cell production technology also continued to develop: one can achieve large-scale high-efficiency monocrystalline silicon cell production.
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