From the big photovoltaic industry to the photovoltaic power generation

The data show that China's photovoltaic industry's capacity production for the fifth consecutive year is the world's first. At present, the highest efficiency of China's monocrystalline silicon battery laboratory is 20.4%, and the efficiency of polycrystalline silicon battery is 17.5%. The thin film battery began to be industrialized, the efficiency of the silicon-based thin film module was 9%, the pilot efficiency of the cadmium telluride module was 8%, and the efficiency of the copper indium gallium selenide module was 8%. The high-concentration concentrating cell has an efficiency of about 40%, a component efficiency of 28%, and a concentrating factor of 1090 times. New battery research is just getting started. In terms of photovoltaic power generation, as of the end of 2011, the national grid-connected solar photovoltaic installed capacity was 2.13 million kilowatts. The benchmark electricity price for photovoltaic power generation determined by China last year was 1.15 yuan per kWh and 1 yuan per kWh, which is higher than conventional energy costs. More than doubled. Although China's photovoltaic industry's production capacity and output have reached the world's first, but now, with the increase of domestic production capacity, the import of photovoltaic products from abroad has increased, Xu Honghua, deputy director of the Institute of Electrical Engineering of the Chinese Academy of Sciences, this shows that China's photovoltaic products Insufficient technical level and low production efficiency. In addition, he pointed out that China's crystalline silicon battery and thin film battery production lines and key equipment factories on the production line, including some auxiliary materials, mainly rely on imports, which is our current shortcomings. As for the application technology of photovoltaic power generation, Xu Honghua believes that we are basically at the same level as foreign countries, but because there is no large-scale start of photovoltaic power generation market in China, the systemic and sustainability of photovoltaic power generation layout is different from the advanced level of foreign countries. According to relevant plans, in 2015, China's solar power generation capacity will reach 5 million kilowatts, and in 2020, solar power generation capacity will reach 25 million kilowatts. To achieve this goal, Xu Honghua said that based on China's existing technology base and needs, the National Energy Technology “Twelfth Five-Year Plan” sets the development goal to study low-cost, low-pollution, high-efficiency solar cell technology and develop photovoltaics. Large-scale application technology of power generation system; master design integration, operation control and protection technology of different types of photovoltaic power generation systems. In the field of high-efficiency large-scale solar photovoltaic power generation, four major tasks of large-scale photovoltaic system technology, solar cell and industrial chain production equipment, large-scale grid-connected photovoltaic power generation system demonstration project, and key equipment of solar photovoltaic power generation system are laid. Xu Honghua believes that this will comprehensively improve the localization level of China's solar photovoltaic power generation technology and products, form key technologies and key equipment with independent intellectual property rights, and establish China's complete solar photovoltaic research and development, equipment manufacturing, system integration, engineering construction, and systems. Industrial chain technical service system such as operation and maintenance. In addition, wind/light/storage hybrid power generation system can alleviate the impact of large-scale wind farms and large-scale photovoltaic power plants alone, and it is of great significance to promote large-scale application of wind power and photovoltaic power generation in China. Based on China's existing technology base and needs, the development goal set in the plan is to study the autonomous operation of water/light/storage hybrid power generation design integration, new inverter, energy storage control, stability control and energy management technology, and with the public grid. The design integration and comprehensive utilization technology of the wind/light/storage power generation of the network.

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