Energy is the basic guarantee for economic and social development. At present, the "energy revolution" centered on the development of clean energy is flourishing in the world, and China's power industry has entered a new period of development. Accelerating the construction of a strong and smart grid with coordinated development of UHV power grids as backbone grids and power grids at all levels will be of great significance for promoting China's transition from a large power country to a powerful power country and to a sound and rapid development of the service economy and society.
The UHV AC/DC transmission demonstration project was completed. On January 6, 2009, China's independent research, design, and construction of the Jindongnan-Nanyang-Jingmen 1000kv UHV AC pilot demonstration project completed and put into operation, which effectively relieved the tension in coal-fired power transmission in Huazhong Power Grid. The promotion of the Three Gorges hydropower transmission has fully verified the technical feasibility, system safety, equipment reliability and environmental friendliness of UHV transmission. On July 8, 2010, the Xiangjiaba-Shanghai UHVDC transmission demonstration project with the highest voltage level in the world, the largest transmission capacity, the longest transmission distance, and the most advanced technology level has been successfully put into operation. The project will deliver 35 billion kwh of clean hydropower to Shanghai each year, directly serving Shanghai World Expo. The successful construction of these two projects has laid the foundation for the large-scale development and utilization of clean energy, large-scale optimization and allocation of energy resources, and further improvement of energy efficiency, and has opened up a new path for sustainable energy development, also for other countries in the world. Solving energy issues offers important options.
Strong progress was made on the key projects of the smart grid. State Grid Corporation of China has developed a strong smart grid development plan and has carried out more than 20 smart grid pilot projects covering all aspects of transmission, transmission, transformation, deployment, use, dispatch, and communications. Among them, the Shanghai World Expo Park smart grid integrated demonstration project has been completed and put into use; in Beijing, Shanghai and other cities have completed the first batch of pilot projects of electric fiber-to-the-home smart community; will build 75 electric vehicle charging stations, 6209 by the end of this year Charging piles; The largest scale demonstration project for wind and solar energy storage and storage in China has been started. In 2012, it will form a comprehensive capacity of 100,000 kilowatts of wind power, 40,000 kilowatts of solar power, and 20,000 kilowatts of chemical energy storage; Smart City, Intelligent Transportation, Smart Home and The Tianjin Eco-City Smart Grid Comprehensive Demonstration Project, which integrates renewable energy use, is being stepped up.
A major breakthrough has been made in the construction of power grid test systems and key technologies. State Grid Corporation has established four R&D centers for UHV AC, DC, high altitude, and engineering mechanics, as well as large-scale power grid simulation and DC package design, and formed a large-scale grid experimental research system with complete functions and comprehensive indexes ranking the world's leading level. . Wind energy, solar power R&D (experimental) center has been initially built. Fully mastered the core technology of UHV AC/DC transmission, successfully developed large-capacity transformers, reactors, converter transformers, converter valves, 6-inch thyristor and other UHV key equipment and components, and formed mass production of UHV key equipment. ability. We have made a number of significant achievements in the research of low-voltage ride-through technology and equipment development for smart meters, large-capacity energy storage batteries, and wind turbines.
Actively play the basic role of the grid to optimize the allocation of resources. The State Grid Corporation of China actively develops cross-regional and inter-provincial power grids, provincial power grids, and urban and rural power distribution networks, builds an open and orderly power market system in line with China's national conditions, and builds national, regional and provincial three-tier power markets from the top down. Open provincial markets, develop regional markets, and cultivate national markets. The national power market transaction power increased from 77.5 billion kWh in 2005 to 294.4 billion kWh in 2009, an increase of nearly 4 times. In 2009, the trans-regional and inter-provincial transaction power of 404.4 billion kilowatt-hours was completed, and a large-scale optimized allocation of power resources was achieved.
Pioneering implementation of the project to improve grid transmission capacity. The State Grid Corporation of China has made every effort to strengthen technological transformation and upgrade the current transmission capacity of the power grid. It organized and implemented a total of 3,310 items for improving the transmission capacity of the power grid in order to increase the transmission capacity of each voltage class by 171 million kWh, equivalent to the construction of 170 500 kV lines. The increase of transmission capacity equals to nearly 10 Three Gorges hydropower stations and maximizes the existing power grid resource allocation capabilities.
During the “Eleventh Five-Year Plan†period, the State Grid Corporation of China has cumulatively put into production 254,000 kilometers of 110 kV and above lines, put into production 110KV or more substation capacity of 1.26 billion kVA, and doubled the grid size in five years.
China's energy endowment and load center are in reverse distribution. China’s energy structure is dominated by coal, and 76% of China’s coal reserves are distributed in northern and western regions such as Shanxi, Inner Mongolia, Shaanxi, and Xinjiang. Energy consumption demand is mainly concentrated in the more developed eastern and central regions. As China's energy development accelerates westward and northward, the transportation distance between large-scale coal energy bases and energy consumption sites is further and longer, and the scale of energy transmission is increasing. The eastern region is not suitable for the large-scale development of coal-fired power plants because of restrictions on land, environmental protection, and transportation. In order to meet the continuously increasing power demand in the future, fundamentally solve the problems such as the repeated occurrence of coal and electricity transportation tensions, and promote the intensive development of large-scale coal energy bases, we must accelerate the development of UHV power grids and implement large-scale, long-distance, and high-efficiency power generation. Transportation, together with the intensive development and utilization of major hydropower, nuclear power, and large-scale renewable energy bases, has resulted in a nation-wide optimized allocation of resources.
Economic and social development put forward higher requirements on the power grid. With the sustained and rapid economic and social development, China's electricity demand will maintain rapid growth over the long term. It is estimated that by 2020, the electricity demand in China will reach 7.7 trillion kWh, and the power generation capacity will reach about 1.6 billion kilowatts, which is more than twice the current level. At the same time, with the advancement of science and technology and the continuous improvement of information technology, electric vehicles, smart devices, smart home appliances, smart buildings, intelligent transportation, and smart cities will become the future development trend. Only by accelerating the construction of a strong and smart grid can we meet the demand for electricity from economic and social development, so as to meet the diversified, personalized and interactive needs of customers for power supply services.
Clean energy development puts forward higher requirements for the development of power grids. In recent years, all countries in the world have paid great attention to the development of clean energy to cope with climate change and solve the problem of continuous supply of energy. At present, the state has issued a series of policies and measures to encourage and promote the development of clean energy. Clean energy such as hydropower, nuclear power, and new energy such as wind power and solar power will continue to develop rapidly. However, the current development of clean energy still faces a series of challenges. For example, hydropower development is seriously constrained by problems such as ecological environment and immigration; nuclear power construction has problems such as inadequate market mechanism, specialization, and low degree of openness; wind power development lacks unified planning and uniform standards, especially since there are many wind power investment entities. The short cycle and quick production results in wind power development that is not compatible with the peaking power supply construction. It is inconsistent with the construction of power grid projects. Problems such as grid connection, delivery, consumption, and operation control are becoming more and more prominent. With the accelerated development of solar power, similar The problem will also appear.
As an important basic industry of the national economy, the electric power industry is transforming the development mode of electric power is an important part of transforming the mode of economic development and is related to the overall economic and social development. At present, all countries in the world are responding to climate change, ensuring energy security and promoting economic development. They have accelerated the development of smart power supplies, smart grids, smart homes, smart transportation, and smart cities. A large number of smart technologies and achievements have been implemented in various industries. It is the rapid promotion and application of the energy industry. In this process, the smart grid has become the key to the intelligent development of energy, and presents a trend of rapid development.
The strong smart grid is a grid that combines strong grids with intelligent organic integration. Strong grid is the material basis for safe and reliable power supply, and intelligence is the key to improving the security, controllability, adaptability, and interaction of the power grid. The distance between the large-scale energy bases under construction in China and the central and eastern load centers is generally more than 800 kilometers, and the distance is more than 3,000 kilometers. Only by building a strong grid can we significantly improve the ability of the grid to optimize resource allocation and withstand accident risks. The UHV power grid under construction is the core of this strong grid.
It is expected that in the next 10 years, with a strong smart grid as a platform, it will promote the realization of more than 10 billion tons of carbon dioxide emission reductions. The grid will play an increasingly important role in economic and social development, energy structure adjustment, and responding to climate change.
The UHV AC/DC transmission demonstration project was completed. On January 6, 2009, China's independent research, design, and construction of the Jindongnan-Nanyang-Jingmen 1000kv UHV AC pilot demonstration project completed and put into operation, which effectively relieved the tension in coal-fired power transmission in Huazhong Power Grid. The promotion of the Three Gorges hydropower transmission has fully verified the technical feasibility, system safety, equipment reliability and environmental friendliness of UHV transmission. On July 8, 2010, the Xiangjiaba-Shanghai UHVDC transmission demonstration project with the highest voltage level in the world, the largest transmission capacity, the longest transmission distance, and the most advanced technology level has been successfully put into operation. The project will deliver 35 billion kwh of clean hydropower to Shanghai each year, directly serving Shanghai World Expo. The successful construction of these two projects has laid the foundation for the large-scale development and utilization of clean energy, large-scale optimization and allocation of energy resources, and further improvement of energy efficiency, and has opened up a new path for sustainable energy development, also for other countries in the world. Solving energy issues offers important options.
Strong progress was made on the key projects of the smart grid. State Grid Corporation of China has developed a strong smart grid development plan and has carried out more than 20 smart grid pilot projects covering all aspects of transmission, transmission, transformation, deployment, use, dispatch, and communications. Among them, the Shanghai World Expo Park smart grid integrated demonstration project has been completed and put into use; in Beijing, Shanghai and other cities have completed the first batch of pilot projects of electric fiber-to-the-home smart community; will build 75 electric vehicle charging stations, 6209 by the end of this year Charging piles; The largest scale demonstration project for wind and solar energy storage and storage in China has been started. In 2012, it will form a comprehensive capacity of 100,000 kilowatts of wind power, 40,000 kilowatts of solar power, and 20,000 kilowatts of chemical energy storage; Smart City, Intelligent Transportation, Smart Home and The Tianjin Eco-City Smart Grid Comprehensive Demonstration Project, which integrates renewable energy use, is being stepped up.
A major breakthrough has been made in the construction of power grid test systems and key technologies. State Grid Corporation has established four R&D centers for UHV AC, DC, high altitude, and engineering mechanics, as well as large-scale power grid simulation and DC package design, and formed a large-scale grid experimental research system with complete functions and comprehensive indexes ranking the world's leading level. . Wind energy, solar power R&D (experimental) center has been initially built. Fully mastered the core technology of UHV AC/DC transmission, successfully developed large-capacity transformers, reactors, converter transformers, converter valves, 6-inch thyristor and other UHV key equipment and components, and formed mass production of UHV key equipment. ability. We have made a number of significant achievements in the research of low-voltage ride-through technology and equipment development for smart meters, large-capacity energy storage batteries, and wind turbines.
Actively play the basic role of the grid to optimize the allocation of resources. The State Grid Corporation of China actively develops cross-regional and inter-provincial power grids, provincial power grids, and urban and rural power distribution networks, builds an open and orderly power market system in line with China's national conditions, and builds national, regional and provincial three-tier power markets from the top down. Open provincial markets, develop regional markets, and cultivate national markets. The national power market transaction power increased from 77.5 billion kWh in 2005 to 294.4 billion kWh in 2009, an increase of nearly 4 times. In 2009, the trans-regional and inter-provincial transaction power of 404.4 billion kilowatt-hours was completed, and a large-scale optimized allocation of power resources was achieved.
Pioneering implementation of the project to improve grid transmission capacity. The State Grid Corporation of China has made every effort to strengthen technological transformation and upgrade the current transmission capacity of the power grid. It organized and implemented a total of 3,310 items for improving the transmission capacity of the power grid in order to increase the transmission capacity of each voltage class by 171 million kWh, equivalent to the construction of 170 500 kV lines. The increase of transmission capacity equals to nearly 10 Three Gorges hydropower stations and maximizes the existing power grid resource allocation capabilities.
During the “Eleventh Five-Year Plan†period, the State Grid Corporation of China has cumulatively put into production 254,000 kilometers of 110 kV and above lines, put into production 110KV or more substation capacity of 1.26 billion kVA, and doubled the grid size in five years.
China's energy endowment and load center are in reverse distribution. China’s energy structure is dominated by coal, and 76% of China’s coal reserves are distributed in northern and western regions such as Shanxi, Inner Mongolia, Shaanxi, and Xinjiang. Energy consumption demand is mainly concentrated in the more developed eastern and central regions. As China's energy development accelerates westward and northward, the transportation distance between large-scale coal energy bases and energy consumption sites is further and longer, and the scale of energy transmission is increasing. The eastern region is not suitable for the large-scale development of coal-fired power plants because of restrictions on land, environmental protection, and transportation. In order to meet the continuously increasing power demand in the future, fundamentally solve the problems such as the repeated occurrence of coal and electricity transportation tensions, and promote the intensive development of large-scale coal energy bases, we must accelerate the development of UHV power grids and implement large-scale, long-distance, and high-efficiency power generation. Transportation, together with the intensive development and utilization of major hydropower, nuclear power, and large-scale renewable energy bases, has resulted in a nation-wide optimized allocation of resources.
Economic and social development put forward higher requirements on the power grid. With the sustained and rapid economic and social development, China's electricity demand will maintain rapid growth over the long term. It is estimated that by 2020, the electricity demand in China will reach 7.7 trillion kWh, and the power generation capacity will reach about 1.6 billion kilowatts, which is more than twice the current level. At the same time, with the advancement of science and technology and the continuous improvement of information technology, electric vehicles, smart devices, smart home appliances, smart buildings, intelligent transportation, and smart cities will become the future development trend. Only by accelerating the construction of a strong and smart grid can we meet the demand for electricity from economic and social development, so as to meet the diversified, personalized and interactive needs of customers for power supply services.
Clean energy development puts forward higher requirements for the development of power grids. In recent years, all countries in the world have paid great attention to the development of clean energy to cope with climate change and solve the problem of continuous supply of energy. At present, the state has issued a series of policies and measures to encourage and promote the development of clean energy. Clean energy such as hydropower, nuclear power, and new energy such as wind power and solar power will continue to develop rapidly. However, the current development of clean energy still faces a series of challenges. For example, hydropower development is seriously constrained by problems such as ecological environment and immigration; nuclear power construction has problems such as inadequate market mechanism, specialization, and low degree of openness; wind power development lacks unified planning and uniform standards, especially since there are many wind power investment entities. The short cycle and quick production results in wind power development that is not compatible with the peaking power supply construction. It is inconsistent with the construction of power grid projects. Problems such as grid connection, delivery, consumption, and operation control are becoming more and more prominent. With the accelerated development of solar power, similar The problem will also appear.
As an important basic industry of the national economy, the electric power industry is transforming the development mode of electric power is an important part of transforming the mode of economic development and is related to the overall economic and social development. At present, all countries in the world are responding to climate change, ensuring energy security and promoting economic development. They have accelerated the development of smart power supplies, smart grids, smart homes, smart transportation, and smart cities. A large number of smart technologies and achievements have been implemented in various industries. It is the rapid promotion and application of the energy industry. In this process, the smart grid has become the key to the intelligent development of energy, and presents a trend of rapid development.
The strong smart grid is a grid that combines strong grids with intelligent organic integration. Strong grid is the material basis for safe and reliable power supply, and intelligence is the key to improving the security, controllability, adaptability, and interaction of the power grid. The distance between the large-scale energy bases under construction in China and the central and eastern load centers is generally more than 800 kilometers, and the distance is more than 3,000 kilometers. Only by building a strong grid can we significantly improve the ability of the grid to optimize resource allocation and withstand accident risks. The UHV power grid under construction is the core of this strong grid.
It is expected that in the next 10 years, with a strong smart grid as a platform, it will promote the realization of more than 10 billion tons of carbon dioxide emission reductions. The grid will play an increasingly important role in economic and social development, energy structure adjustment, and responding to climate change.
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