The increase of hydroelectric power generation is closely related to the increase of social demand for electricity. In recent year, with that strong support of the state for the development of wind power, photovoltaic pow, nuclear power and other new energy sources, the proportion of the output of traditional thermal power and hydroelectric pow has kept steady development despite a decline. Hydropower is still that main force of renewable pow supply.
Mention the hydropower station, the first time we think of may be the Three Gorges hydropower station, its successful operation, to meet the domestic power demand. In addition to the Three Gorges Hydropower Station, Baihetan Hydropower Station is also a large-scale hydropower station, in fact, the capacity of Baihetan Hydropower Station is second only to the Three Gorges Hydropower Station.
Baihetan Hydropower Station is located in the lower reaches of Jinsha River. with abundant hydropower resources, it has cumulatively produced over 48 billion kilowatts of clean electric power to meet the electric demand of Jiangsu and Zhejiang provinces.
Recently, Unit 10 of Baihetan Hydropower Station successfully passed 72-hour trial operation and was officially put into commercial operation, which is the 15th million-kilowatt hydroelectric generator set of Baihetan Hydropower Station. So far, the Baihetan Hydropower Station is one step closer to full commissioning.
In recent years, many new hydropower stations have been built in China. What are the advantages of hydroelectric power generation? Why should our country develop hydroelectric power greatly?
The first is renewable resources. Unlike coal-fired power generation, which relies on fossil fuels for power generation, water resources can be recycled. Secondly, the cost of hydroelectric power generation is relatively low and, according to rough estimates, at the same capacity, The annual operating cost of thermal power plants is about 10 to 15 times that of hydropower plants of the same capacity; moreover, the carbon emissions from hydropower generation are much lower than those from thermal power generation.
Although hydroelectric power has many advantages, it is greatly influenced by rainwater. the traditional hydropower station often faces the dilemma of no power generation in the season of lack of rainwater, until the appearance of pumped storage power station, this situation is changed.
Pumped-storage power station, also known as storage-type hydropower station, can transform the surplus electric energy when the grid load is low into high-value electric energy during the peak period of the grid, and is also suitable for frequency modulation, phase modulation, stabilizing the cycle and voltage of the power system. In addition, it is suitable for emergency backup, and can also improve that efficiency of the thermal pow station and the nuclear power station in the system. According to statistics, by the end of 2009, there were 22 pumped-storage power stations with a total capacity of 11545MW. Among them, there are 11 large-scale pure pumped-storage power stations (< including the Shisanling in Beijing, Phase I and Phase II in Guangzhou, Zhejiang Tianhuangping and Tongbai, Jilin Baishan, Shandong Taian, Anhui Langyashan, Jiangsu Yixing and Shanxi Xilongchi). Zhanghewan, Hebei Province, has an installed capacity of 10400MW, the remaining 11 units have an installed capacity of 1145MW, and 8 units under construction have an installed capacity of 9360MW.
Pumped storage power station plays an important role in large energy base construction. Wind power, photovoltaic and other new energy sources have the problem of unstable power generation, so it is necessary to equip energy storage facilities and adjust them when necessary to keep the output power stable, with mature pumped storage technology and large storage capacity. It can meet the peak shaving requirements of wind power and solar power generation.
Zhou Jianping, chief engineer of China Power Construction, believes that pumped storage is a mainstream technology for large-scale energy storage at present, which has the advantages of large energy storage capacity, high system efficiency, long operation life and environmental friendliness. However, at present, the proportion of total power installation machine in China is less than 2%. China's pumped storage industry still has a large space for development. Original title: wind power photovoltaic "good helper" pumped storage hydropower station prospects
