This paper introduces the development of technology and its measures for city power network in China, looks forward to the prospect of development in forthcoming decade and the technical principles to be adopted.
In recent years,China has made significant progress in the construction of highways,resulting in an improved highway network that has provided robust support for economic and social development.However,the rapid expan...In recent years,China has made significant progress in the construction of highways,resulting in an improved highway network that has provided robust support for economic and social development.However,the rapid expansion of highway construction,power supply,and distribution has led to several challenges in mechanical and electrical engineering technology.Ensuring the safe,stable,and cost-effective operation of the power supply and distribution system to meet the diverse requirements of highway operations has become a pressing issue.This article takes an example of a highway electromechanical engineering power supply and distribution construction project to provide insight into the construction process of highway electromechanical engineering power supply and distribution technology.展开更多
Unlike the traditional traction power supply system which enables the electrified railway traction sub- station to be connected to power grid in a way of phase rotation, a new generation traction power supply system w...Unlike the traditional traction power supply system which enables the electrified railway traction sub- station to be connected to power grid in a way of phase rotation, a new generation traction power supply system without phase splits is proposed in this paper. Three key techniques used in this system have been discussed. First, a combined co-phase traction power supply system is applied at traction substations for compensating negative sequence current and eliminating phase splits at exits of substations; design method and procedure for this system are presented. Second, a new bilateral traction power supply technology is proposed to eliminate the phase split at section post and reduce the influence of equalizing current on the power grid. Meanwhile, power factor should be adjusted to ensure a proper voltage level of the traction network. Third, a seg- mental power supply technology of traction network is used to divide the power supply arms into several segments, and the synchronous measurement and control technology is applied to diagnose faults and their locations quickly and accurately. Thus, the fault impact can be limited to a min- imum degree. In addition, the economy and reliability of the new generation traction power supply system are analyzed.展开更多
In China, electricity consumption keeps growing at a high speed and installed capacity will be dou- bled in the next fifteen years. As the world second CO2 producer and also a member of Kyoto Protocol, how to balance ...In China, electricity consumption keeps growing at a high speed and installed capacity will be dou- bled in the next fifteen years. As the world second CO2 producer and also a member of Kyoto Protocol, how to balance energy needs and environmental protection responsibility in the future is a serious problem for China. As such, there are a number of technology choices for today's electric power generation. After discussing the current advanced power generation technologies based on Chinese energy structure and current conditions of power industry, this paper gives a reference to the technology options for China in the future.展开更多
In China, electricity consumption keeps growing at a high speed and installed capacity will be doubled in the next fifteen years. As the world second CO2 producer and also a member of Kyoto Protocol, how to balance en...In China, electricity consumption keeps growing at a high speed and installed capacity will be doubled in the next fifteen years. As the world second CO2 producer and also a member of Kyoto Protocol, how to balance energy needs and environmental protection responsibility in the future is a serious problem for China. As such, there are a number of technology choices for today's electric power generation. After discussing the current advanced power generation technologies based on Chinese energy structure and current conditions of power industry, this paper gives a reference to the technology options for China in the future. Here published is the second part of the paper.展开更多
China is a large developing country with rapid growth rate. To the year 2050, its electric power will be increased by six to eight times, reaching 1.5—1.8 TW total installed capacity. The development can not only rel...China is a large developing country with rapid growth rate. To the year 2050, its electric power will be increased by six to eight times, reaching 1.5—1.8 TW total installed capacity. The development can not only rely on the existing technology, it is crucial to accelerate the new technology development. This article discusses the perspective of various new technologies from the available energy resources and the required increase of electric power.展开更多
Hydroelectric power equipment consists of a hydro-turbine and a hydrogenerator whose weldments have the features of complicated construction and large bulk as well as some parts operating under water. With the increas...Hydroelectric power equipment consists of a hydro-turbine and a hydrogenerator whose weldments have the features of complicated construction and large bulk as well as some parts operating under water. With the increase of unit rating of the hydroelectric power equipment, the application field of high strength steel and dissimilar steel has been enlarged. What to be introduced in this paper is the development of the welding technology of large hydroelectric generating equipment in China since the 1970s, and the development orientation of its welding construction and procedure in the future.展开更多
Introduction Within the context of deeper global energy shortage and increasingly more polluted environment,countries throughout the world have been actively developing renewable energy sources to replace the fossil f...Introduction Within the context of deeper global energy shortage and increasingly more polluted environment,countries throughout the world have been actively developing renewable energy sources to replace the fossil fuel,展开更多
On the basis of introducing clean power generation technologies, the author calculated and analyzed the investment, economy and environmental protection of these technologies, posed his views of giving the priorities ...On the basis of introducing clean power generation technologies, the author calculated and analyzed the investment, economy and environmental protection of these technologies, posed his views of giving the priorities to the development of supercritical and ultra-supercritical pressure coal-fired power generation technologies and taking vigorous action to nuclear power generation technology within the following 5-10 years, exploiting wind power within the following 10-15 years, and suggested that the installed capacity of nuclear power reach 80-100 GW and that of wind power reach 50-80 GW by 2020.展开更多
China's rail transit construction has made great innovation with the country's economic development. At present, the urban railway planning and route construction of major cities in China have tended to satura...China's rail transit construction has made great innovation with the country's economic development. At present, the urban railway planning and route construction of major cities in China have tended to saturate, and the surrounding small cities are speeding up the construction of tracks. In order to shorten the distance between cities and rural suburbs with more efficiency and high speed, facilitate the rapid development of traffic in these small cities and suburbs, and facilitate the travel of residents, we should accelerate the transformation of the speed of urban rail construction, take the express line project as the new situation of its construction, and invest funds. Taking an ac power supply metro project in Chengdu as an example, this paper briefly introduces the content, difficulties, adjustment methods and innovation of the express line engineering mode, so as to provide reference for relevant personnel.展开更多
In the domestic development of various industries to increase the demand for energy, in the gas station, energy is also a key resource and an important guarantee for the sustainable development of the current society....In the domestic development of various industries to increase the demand for energy, in the gas station, energy is also a key resource and an important guarantee for the sustainable development of the current society. Under the current environment of rapid development of domestic economy, many renewable resources will be accompanied by people's resource utilization, and the slow reduction will lead to resource shortage or a vicious cycle of development. Therefore, strengthen the social work is crucial, energy saving and emission reduction in gas station, photovoltaic power generation technology can adapt to the development of low carbon society modernization, can introduce green environmental protection as the concept of engineering construction, make the photovoltaic power generation technology, energy saving technology to implement to the concrete in the construction of gas station, enables the regions come on site to the development of sustainable cycle use of solar energy. This article focuses on the application of photovoltaic power generation technology in the actual gas station specific analysis, and the idea of photovoltaic power generation technology application has been analyzed.展开更多
With the coordinated development of today's social economy with science and technology,various advanced technologies are being used in highway engineering,especially the distributed intelligent power supply techno...With the coordinated development of today's social economy with science and technology,various advanced technologies are being used in highway engineering,especially the distributed intelligent power supply technology in expressway tunnels,which has a very significant advantage.In order to realize the effective application of this technology and promote the power supply effect in expressway tunnel,this study analyzes the advantages of this technology and its application in expressway tunnel,hoping to provide scientific reference for the application of distributed intelligent power supply technology and the engineering development of expressway tunnels.展开更多
This paper focuses on power grid AVC operation management related content is analyzed. And extended to about the summary of the AVC system development, used to clear the functions of the system, then aimed at the syst...This paper focuses on power grid AVC operation management related content is analyzed. And extended to about the summary of the AVC system development, used to clear the functions of the system, then aimed at the system optimization and upgrading of the proposed guidance, improve the success rate of voltage, for example, to reduce line loss, etc. Hope that through this study, it can effectively promote the improvement of AVC system automation control level.展开更多
The power supply system is equipped with power grid monitoring technology, which can effectively monitor the operation of the whole system, so as to ensure the operation efficiency of the power grid. Especially with t...The power supply system is equipped with power grid monitoring technology, which can effectively monitor the operation of the whole system, so as to ensure the operation efficiency of the power grid. Especially with the wide application of automation and intelligent technology, the overall application level of power grid monitoring technology has been greatly improved. However, at present, the comprehensive integration of power grid monitoring technology and power supply system still needs to be further promoted. Based on this, this paper focuses on the importance of the application of power grid monitoring technology in power supply system, as well as specific application strategies and problems faced at this stage, and puts forward solutions to relevant problems, committed to improving the efficiency of power grid monitoring.展开更多
Under the background of the sustainable development of modern science and technology, more advanced technical means are applied to power engineering. The development of automatic detection and engineering control equi...Under the background of the sustainable development of modern science and technology, more advanced technical means are applied to power engineering. The development of automatic detection and engineering control equipment renewal promotes the development trend of automation and intelligence in power engineering. At the same time, the application of traditional technical means has been unable to meet the modern development needs of power engineering. In order to avoid frequent problems in the operation of power engineering and further promote the role and function of power engineering, we should pay attention to the effective application of power electrical automation technology in the operation and control process of power engineering.展开更多
This paper mainly analyzes the main reasons that affect the safety and reliability of power supply and consumption technology, and emphatically introduces the effective measures for improving the safety and reliabilit...This paper mainly analyzes the main reasons that affect the safety and reliability of power supply and consumption technology, and emphatically introduces the effective measures for improving the safety and reliability of power system. With the development of market economy, the demand for water conservancy projects has also increased significantly. Only by improving the safety and reliability of electricity supply and utilization technology can the demand for electricity be met, thus improving the service quality and efficiency of urban management and further promoting the development of water conservancy projects in China in a better direction.展开更多
As a result of Japan raising the alert level at its quake-damaged nuclear plant from four to seven on a seven-point international scale of atomic incidents,which was caused by the 9.0-magnitude earthquake
文摘This paper introduces the development of technology and its measures for city power network in China, looks forward to the prospect of development in forthcoming decade and the technical principles to be adopted.
文摘In recent years,China has made significant progress in the construction of highways,resulting in an improved highway network that has provided robust support for economic and social development.However,the rapid expansion of highway construction,power supply,and distribution has led to several challenges in mechanical and electrical engineering technology.Ensuring the safe,stable,and cost-effective operation of the power supply and distribution system to meet the diverse requirements of highway operations has become a pressing issue.This article takes an example of a highway electromechanical engineering power supply and distribution construction project to provide insight into the construction process of highway electromechanical engineering power supply and distribution technology.
基金supported by the National Natural Science Funds of China (Nos. 51307143 and 51307142)Technology Research and Development Program of China Railway Corporation (No. 2014J009-B)
文摘Unlike the traditional traction power supply system which enables the electrified railway traction sub- station to be connected to power grid in a way of phase rotation, a new generation traction power supply system without phase splits is proposed in this paper. Three key techniques used in this system have been discussed. First, a combined co-phase traction power supply system is applied at traction substations for compensating negative sequence current and eliminating phase splits at exits of substations; design method and procedure for this system are presented. Second, a new bilateral traction power supply technology is proposed to eliminate the phase split at section post and reduce the influence of equalizing current on the power grid. Meanwhile, power factor should be adjusted to ensure a proper voltage level of the traction network. Third, a seg- mental power supply technology of traction network is used to divide the power supply arms into several segments, and the synchronous measurement and control technology is applied to diagnose faults and their locations quickly and accurately. Thus, the fault impact can be limited to a min- imum degree. In addition, the economy and reliability of the new generation traction power supply system are analyzed.
文摘In China, electricity consumption keeps growing at a high speed and installed capacity will be dou- bled in the next fifteen years. As the world second CO2 producer and also a member of Kyoto Protocol, how to balance energy needs and environmental protection responsibility in the future is a serious problem for China. As such, there are a number of technology choices for today's electric power generation. After discussing the current advanced power generation technologies based on Chinese energy structure and current conditions of power industry, this paper gives a reference to the technology options for China in the future.
文摘In China, electricity consumption keeps growing at a high speed and installed capacity will be doubled in the next fifteen years. As the world second CO2 producer and also a member of Kyoto Protocol, how to balance energy needs and environmental protection responsibility in the future is a serious problem for China. As such, there are a number of technology choices for today's electric power generation. After discussing the current advanced power generation technologies based on Chinese energy structure and current conditions of power industry, this paper gives a reference to the technology options for China in the future. Here published is the second part of the paper.
文摘China is a large developing country with rapid growth rate. To the year 2050, its electric power will be increased by six to eight times, reaching 1.5—1.8 TW total installed capacity. The development can not only rely on the existing technology, it is crucial to accelerate the new technology development. This article discusses the perspective of various new technologies from the available energy resources and the required increase of electric power.
文摘Hydroelectric power equipment consists of a hydro-turbine and a hydrogenerator whose weldments have the features of complicated construction and large bulk as well as some parts operating under water. With the increase of unit rating of the hydroelectric power equipment, the application field of high strength steel and dissimilar steel has been enlarged. What to be introduced in this paper is the development of the welding technology of large hydroelectric generating equipment in China since the 1970s, and the development orientation of its welding construction and procedure in the future.
文摘Introduction Within the context of deeper global energy shortage and increasingly more polluted environment,countries throughout the world have been actively developing renewable energy sources to replace the fossil fuel,
文摘On the basis of introducing clean power generation technologies, the author calculated and analyzed the investment, economy and environmental protection of these technologies, posed his views of giving the priorities to the development of supercritical and ultra-supercritical pressure coal-fired power generation technologies and taking vigorous action to nuclear power generation technology within the following 5-10 years, exploiting wind power within the following 10-15 years, and suggested that the installed capacity of nuclear power reach 80-100 GW and that of wind power reach 50-80 GW by 2020.
文摘China's rail transit construction has made great innovation with the country's economic development. At present, the urban railway planning and route construction of major cities in China have tended to saturate, and the surrounding small cities are speeding up the construction of tracks. In order to shorten the distance between cities and rural suburbs with more efficiency and high speed, facilitate the rapid development of traffic in these small cities and suburbs, and facilitate the travel of residents, we should accelerate the transformation of the speed of urban rail construction, take the express line project as the new situation of its construction, and invest funds. Taking an ac power supply metro project in Chengdu as an example, this paper briefly introduces the content, difficulties, adjustment methods and innovation of the express line engineering mode, so as to provide reference for relevant personnel.
文摘In the domestic development of various industries to increase the demand for energy, in the gas station, energy is also a key resource and an important guarantee for the sustainable development of the current society. Under the current environment of rapid development of domestic economy, many renewable resources will be accompanied by people's resource utilization, and the slow reduction will lead to resource shortage or a vicious cycle of development. Therefore, strengthen the social work is crucial, energy saving and emission reduction in gas station, photovoltaic power generation technology can adapt to the development of low carbon society modernization, can introduce green environmental protection as the concept of engineering construction, make the photovoltaic power generation technology, energy saving technology to implement to the concrete in the construction of gas station, enables the regions come on site to the development of sustainable cycle use of solar energy. This article focuses on the application of photovoltaic power generation technology in the actual gas station specific analysis, and the idea of photovoltaic power generation technology application has been analyzed.
文摘With the coordinated development of today's social economy with science and technology,various advanced technologies are being used in highway engineering,especially the distributed intelligent power supply technology in expressway tunnels,which has a very significant advantage.In order to realize the effective application of this technology and promote the power supply effect in expressway tunnel,this study analyzes the advantages of this technology and its application in expressway tunnel,hoping to provide scientific reference for the application of distributed intelligent power supply technology and the engineering development of expressway tunnels.
文摘This paper focuses on power grid AVC operation management related content is analyzed. And extended to about the summary of the AVC system development, used to clear the functions of the system, then aimed at the system optimization and upgrading of the proposed guidance, improve the success rate of voltage, for example, to reduce line loss, etc. Hope that through this study, it can effectively promote the improvement of AVC system automation control level.
文摘The power supply system is equipped with power grid monitoring technology, which can effectively monitor the operation of the whole system, so as to ensure the operation efficiency of the power grid. Especially with the wide application of automation and intelligent technology, the overall application level of power grid monitoring technology has been greatly improved. However, at present, the comprehensive integration of power grid monitoring technology and power supply system still needs to be further promoted. Based on this, this paper focuses on the importance of the application of power grid monitoring technology in power supply system, as well as specific application strategies and problems faced at this stage, and puts forward solutions to relevant problems, committed to improving the efficiency of power grid monitoring.
文摘Under the background of the sustainable development of modern science and technology, more advanced technical means are applied to power engineering. The development of automatic detection and engineering control equipment renewal promotes the development trend of automation and intelligence in power engineering. At the same time, the application of traditional technical means has been unable to meet the modern development needs of power engineering. In order to avoid frequent problems in the operation of power engineering and further promote the role and function of power engineering, we should pay attention to the effective application of power electrical automation technology in the operation and control process of power engineering.
文摘This paper mainly analyzes the main reasons that affect the safety and reliability of power supply and consumption technology, and emphatically introduces the effective measures for improving the safety and reliability of power system. With the development of market economy, the demand for water conservancy projects has also increased significantly. Only by improving the safety and reliability of electricity supply and utilization technology can the demand for electricity be met, thus improving the service quality and efficiency of urban management and further promoting the development of water conservancy projects in China in a better direction.
文摘As a result of Japan raising the alert level at its quake-damaged nuclear plant from four to seven on a seven-point international scale of atomic incidents,which was caused by the 9.0-magnitude earthquake
