The transformation of energy calls for the development of power grids. "The development of clean energy and smart grids has become an important symbol of a new round of energy transformation. The power grid plays a pivotal role in the development and utilization of clean energy." Shu Yinqi, Deputy General Manager of State Grid Corporation, talks about the development of clean energy in China. Said, "Transforming clean energy to electricity is the basic way to achieve the effective use of clean energy."
From the perspective of China's energy consumption structure, primary energy sources rely heavily on fossil fuels. In 2009, China’s coal consumption accounted for more than 70%, oil accounted for 18%, hydropower 6.4%, and nuclear power was less than 1%. Moreover, our country is in the midst of heavy industrialization in the middle of industrialization. There is still a rigid demand for energy and there will be substantial growth.
However, the country proposes that the share of non-fossil energy in primary energy consumption will reach around 15% by 2020, and the unit of GDP of CO2 emissions will fall by 40% to 45% compared with 2005, which is the “propositional composition†for a given answer. How to do? “We want to save energy, energy conservation priority. To set the ceiling, the total energy consumption by 2015 can not exceed 4.5 billion tons of standard coal.†Wu Hao, deputy director of the National Energy Agency said.
On the other hand, clean energy will occupy an increasingly important position in the energy consumption structure, and electric energy is the most convenient intermediate carrier for ensuring the effective use of clean energy. From the perspective of countries in the world, the proportion of clean energy into electrical energy accounts for about 80%, and some even reach 98%. "When the new energy is to be on the stage of history, the power of electricity is rejuvenated." Shuyin Yin said.
In the process of transforming clean energy into electricity, there will be problems such as unstable output, discontinuity, reversed distribution of energy production sites and load centers, etc. At this time, the smart grid will become an important guarantee for maximizing the consumption of clean energy. Shuyin Yin said that the smart grid can guarantee the large-scale cross-regional absorption of renewable energy bases, can improve the efficiency of energy transmission in the power system, and more importantly, it can provide strong grid support for the development of miniaturized and distributed renewable energy.
Smart Grid Construction The rapid development of the smart grid as the current trend and major trend of the development of the international power grid has gone through a process that is not clear, divergent, and gradually clear and unified. Zhang Yibin, director of the Institute of Smart Grid Research of the State Grid Energy Research Institute, believes that the smart grid should be a complete intelligent system covering all fields of power generation, transmission, substation, distribution, electricity, dispatch, and communications. He stressed that the development of China's smart grid should be based on UHV power grids as the backbone of the grid, coordinated development of the grid at all levels to adapt to and promote a new round of energy changes.
China has already taken a leading position in the construction of UHV backbone grids. At the same time, at all levels of power grid construction, during the “Eleventh Five-Year Plan†period, the transmission line length of 110 kV and above has increased by 2.84 million kilometers, with a substation capacity of 1.13 billion kVA, a power load of 227 million kilowatts, and a power demand of 13,000. Hundreds of kilowatt-hours have reversed the passive situation in which the construction of power grids is seriously lagging behind and eased the situation of power shortage.
For the acceptance of new energy, large-scale smart grids have a unique advantage. Shu Yinzhe gave an example of an image. The output curve of a single wind farm in the power grid is very discontinuous, and the output curve of a wind power group becomes smooth. If wind power groups in Inner Mongolia, Hebei, and Jiangsu are again Stacked together, this curve is smoother. Therefore, the larger the grid, the better the operating characteristics. By accelerating the pace of power grid construction, the installed capacity of grid-connected wind turbines of the State Grid Corporation of China amounted to 23.81 million kilowatts from January to September 2010, and the large-scale power grid effectively ensured the timely integration of wind power.
In addition, the smart grid has also broadened the green industry chain, promoted the development of electric vehicles, and helped ordinary consumers reduce their cost of living. After extensive testing, it has been found that electric vehicles require about 16 kWh per 100 km of travel, less than 10 yuan, and 100 km of fuel cost about 60 to 70 yuan.
Regarding the future development of the smart grid, Xia Qing, deputy director of the Department of Electrical Engineering at Tsinghua University, suggested that an incentive pricing mechanism be implemented so that all users can intuitively feel how much the electricity cost of the grid is at different locations and at different times and guide users to the most The right way to use electricity.
Transforming the development mode of the power grid The core issue of the 'Twelfth Five-Year Plan' is to transform the development mode of the power grid vigorously. At present, China's energy transmission mainly depends on railways and highways, and the grid is also a means of energy transmission, and it is more economical and environmentally friendly.
Shuyin Yin said that changing the development mode of the power grid must break provincial barriers and reverse and break the local balance. In the past, the way to develop power supply was local balance, that is, how much electricity was needed in various places, so as to make its own load forecasting, considering only how much the local installed capacity would reach, how much local coal supply could reach, and how much coal could be shipped out. At present, the eastern provinces have already realized that this type of development is unsustainable and that electricity needs to be delivered directly from the west. Transmission is one of the most important ways of energy transmission, and it is also one of the most economical and clean transportation methods. Power transmission is the most efficient method in the entire energy transmission, and the transportation cost is also the lowest. Therefore, it is necessary to change the development mode during the “Twelfth Five-Year Plan†period.
At the same time, adjusting the energy consumption structure and increasing the installed capacity of renewable energy is also a key task during the “12th Five-Year Plan†period. It is estimated that by 2015, the state-owned power grid company's power supply area will have 238 million kilowatts of clean energy installed, and 690 million tons of carbon dioxide emissions will be reduced. The average coal consumption per kilowatt-hour is 30 grams lower than in 2005, saving 100 million tons of standard coal. "These will become an important direction for us to change the development mode of the power grid during the 12th Five-year Plan period," said Shuyin Yin.
From the perspective of China's energy consumption structure, primary energy sources rely heavily on fossil fuels. In 2009, China’s coal consumption accounted for more than 70%, oil accounted for 18%, hydropower 6.4%, and nuclear power was less than 1%. Moreover, our country is in the midst of heavy industrialization in the middle of industrialization. There is still a rigid demand for energy and there will be substantial growth.
However, the country proposes that the share of non-fossil energy in primary energy consumption will reach around 15% by 2020, and the unit of GDP of CO2 emissions will fall by 40% to 45% compared with 2005, which is the “propositional composition†for a given answer. How to do? “We want to save energy, energy conservation priority. To set the ceiling, the total energy consumption by 2015 can not exceed 4.5 billion tons of standard coal.†Wu Hao, deputy director of the National Energy Agency said.
On the other hand, clean energy will occupy an increasingly important position in the energy consumption structure, and electric energy is the most convenient intermediate carrier for ensuring the effective use of clean energy. From the perspective of countries in the world, the proportion of clean energy into electrical energy accounts for about 80%, and some even reach 98%. "When the new energy is to be on the stage of history, the power of electricity is rejuvenated." Shuyin Yin said.
In the process of transforming clean energy into electricity, there will be problems such as unstable output, discontinuity, reversed distribution of energy production sites and load centers, etc. At this time, the smart grid will become an important guarantee for maximizing the consumption of clean energy. Shuyin Yin said that the smart grid can guarantee the large-scale cross-regional absorption of renewable energy bases, can improve the efficiency of energy transmission in the power system, and more importantly, it can provide strong grid support for the development of miniaturized and distributed renewable energy.
Smart Grid Construction The rapid development of the smart grid as the current trend and major trend of the development of the international power grid has gone through a process that is not clear, divergent, and gradually clear and unified. Zhang Yibin, director of the Institute of Smart Grid Research of the State Grid Energy Research Institute, believes that the smart grid should be a complete intelligent system covering all fields of power generation, transmission, substation, distribution, electricity, dispatch, and communications. He stressed that the development of China's smart grid should be based on UHV power grids as the backbone of the grid, coordinated development of the grid at all levels to adapt to and promote a new round of energy changes.
China has already taken a leading position in the construction of UHV backbone grids. At the same time, at all levels of power grid construction, during the “Eleventh Five-Year Plan†period, the transmission line length of 110 kV and above has increased by 2.84 million kilometers, with a substation capacity of 1.13 billion kVA, a power load of 227 million kilowatts, and a power demand of 13,000. Hundreds of kilowatt-hours have reversed the passive situation in which the construction of power grids is seriously lagging behind and eased the situation of power shortage.
For the acceptance of new energy, large-scale smart grids have a unique advantage. Shu Yinzhe gave an example of an image. The output curve of a single wind farm in the power grid is very discontinuous, and the output curve of a wind power group becomes smooth. If wind power groups in Inner Mongolia, Hebei, and Jiangsu are again Stacked together, this curve is smoother. Therefore, the larger the grid, the better the operating characteristics. By accelerating the pace of power grid construction, the installed capacity of grid-connected wind turbines of the State Grid Corporation of China amounted to 23.81 million kilowatts from January to September 2010, and the large-scale power grid effectively ensured the timely integration of wind power.
In addition, the smart grid has also broadened the green industry chain, promoted the development of electric vehicles, and helped ordinary consumers reduce their cost of living. After extensive testing, it has been found that electric vehicles require about 16 kWh per 100 km of travel, less than 10 yuan, and 100 km of fuel cost about 60 to 70 yuan.
Regarding the future development of the smart grid, Xia Qing, deputy director of the Department of Electrical Engineering at Tsinghua University, suggested that an incentive pricing mechanism be implemented so that all users can intuitively feel how much the electricity cost of the grid is at different locations and at different times and guide users to the most The right way to use electricity.
Transforming the development mode of the power grid The core issue of the 'Twelfth Five-Year Plan' is to transform the development mode of the power grid vigorously. At present, China's energy transmission mainly depends on railways and highways, and the grid is also a means of energy transmission, and it is more economical and environmentally friendly.
Shuyin Yin said that changing the development mode of the power grid must break provincial barriers and reverse and break the local balance. In the past, the way to develop power supply was local balance, that is, how much electricity was needed in various places, so as to make its own load forecasting, considering only how much the local installed capacity would reach, how much local coal supply could reach, and how much coal could be shipped out. At present, the eastern provinces have already realized that this type of development is unsustainable and that electricity needs to be delivered directly from the west. Transmission is one of the most important ways of energy transmission, and it is also one of the most economical and clean transportation methods. Power transmission is the most efficient method in the entire energy transmission, and the transportation cost is also the lowest. Therefore, it is necessary to change the development mode during the “Twelfth Five-Year Plan†period.
At the same time, adjusting the energy consumption structure and increasing the installed capacity of renewable energy is also a key task during the “12th Five-Year Plan†period. It is estimated that by 2015, the state-owned power grid company's power supply area will have 238 million kilowatts of clean energy installed, and 690 million tons of carbon dioxide emissions will be reduced. The average coal consumption per kilowatt-hour is 30 grams lower than in 2005, saving 100 million tons of standard coal. "These will become an important direction for us to change the development mode of the power grid during the 12th Five-year Plan period," said Shuyin Yin.
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