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 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
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
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
This paper is based on the existing status and development prediction of Fujian power industry, and describes that the structure of energy sources for generating power which will mainly use coal, will not be changed i...This paper is based on the existing status and development prediction of Fujian power industry, and describes that the structure of energy sources for generating power which will mainly use coal, will not be changed in the 2010s and 2020s in Fujian Province. In order to meet the requirements of high efficiency and envirofimental protection, the usage of clean coal technologies for power generating will be an inevitable option and the technologies will occupy the important position in Fujian power industry. This paper puts forward the staged targets and measures of developing and utilizing clean coal technologies, suggests that all government depotments related should give support and guarantee in policies and conditions, and welcome technical and economic cooperation at home and abroad, which is good for co-development of both parties.展开更多
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.
Since Prof. Jorg SCHLAICH from the University of Stuttgart in Germany built the first solar chimney power plant （SCPP） prototype in the early 1980s, research on SCPP technology has aroused worldwide attention from e...Since Prof. Jorg SCHLAICH from the University of Stuttgart in Germany built the first solar chimney power plant （SCPP） prototype in the early 1980s, research on SCPP technology has aroused worldwide attention from experiment, to theory and then feasibility studies for large-scale commercial application.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
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
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
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
Power supply transformation technology is a required course for new energy major, which is a comprehensive course. Under the traditional teaching mode, students have no concept of waveform, which brings many difficult...Power supply transformation technology is a required course for new energy major, which is a comprehensive course. Under the traditional teaching mode, students have no concept of waveform, which brings many difficulties to teaching and experiment. A power transformation technology based on PSIM simulation is proposed. Before class, students solve the task of building the simulation model, and then introduce the knowledge points. This can not only make up for the lack of experimental facilities and also stimulate students interest in learning. Classroom teaching practice shows that this method can effectively improve the teaching and experiment efficiency.展开更多
Nowadays, the global climate is undergoing great changes, the global population is increasing and the energy problem is becoming more and more serious, so the construction of smart grid has attracted global attention....Nowadays, the global climate is undergoing great changes, the global population is increasing and the energy problem is becoming more and more serious, so the construction of smart grid has attracted global attention. At present, the main goal of domestic power grid companies is to combine the strong grid structure with intelligent construction. The system mainly includes power generation technology, communication technology, automatic regulation technology, etc.展开更多
With the rapid development of society, the world is gradually developing towards economic globalization, and the people's quality of life and level are getting higher and higher. While bringing more help to people...With the rapid development of society, the world is gradually developing towards economic globalization, and the people's quality of life and level are getting higher and higher. While bringing more help to people's high-quality life, the problem of energy scarcity is becoming more and more prominent, which has a serious adverse impact on the further development of society. Because solar energy is inexhaustible and can be obtained in different regions, it has become a new type of energy and an indispensable part of human development and use. With the rapid development of modern society, the application of solar photovoltaic power generation technology can greatly reduce the energy consumption.展开更多
With the continuous development of the Times and the continuous innovation and progress of science and technology, under the social background of socialism with Chinese characteristics into a new era, China's prim...With the continuous development of the Times and the continuous innovation and progress of science and technology, under the social background of socialism with Chinese characteristics into a new era, China's primary, secondary and tertiary industries have achieved unprecedented development. Both show a thriving momentum of development, and the momentum of economic development also shows a rapid trend. However, with the continuous development and progress of the society, under the premise that innovation has become the core driving force guiding all walks of life, the traditional natural resources and energy are obviously no longer suitable for the current development trend. Based on this, the exploration and effective application of new energy technology has become the core elements leading the future development of various industries. This paper focuses on the application field and application direction of new energy photovoltaic power generation technology, through comprehensive, multi-angle and layered analysis, and strives to provide practical suggestions and specific measures for the deep application of new energy photovoltaic power generation technology, and then help the further development of new energy photovoltaic power generation technology.展开更多
For the railway power supply system, divided into power traction power supply and signal auxiliary system power supply, and in the general name, the two power supply mode called power supply system and distribution sy...For the railway power supply system, divided into power traction power supply and signal auxiliary system power supply, and in the general name, the two power supply mode called power supply system and distribution system. According to the different power supply equipment, the main function of power supply system is to provide power for locomotive running, while the main function of distribution system is to provide power for some equipment (interval equipment) along the railway. These two power supply modes exist independently and do not interfere with each other. At the same time, when supplying power to the interval equipment, most of the equipment is powered by independent power supply, including the main power distribution and standby power distribution, which are switched through the electrical control circuit. However, in the traditional distribution mode, the overall stability of the power grid is required to be high. If the electric energy of the power grid often fluctuates, it will cause the distribution failure of the equipment in the interval, resulting in the effectiveness of the equipment. Therefore, it is necessary to improve the stability of the interval distribution system and select a more reliable distribution mode. Photovoltaic power generation is a way of railway power supply, whether it is feasible to be applied in railway interval distribution system needs continuous research. Based on this, this paper takes photovoltaic power generation technology in the application of railway interval distribution system as the entry point, and discusses the way of its application, hoping to bring certain reference significance to the application of interval distribution system.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
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 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This paper is based on the existing status and development prediction of Fujian power industry, and describes that the structure of energy sources for generating power which will mainly use coal, will not be changed in the 2010s and 2020s in Fujian Province. In order to meet the requirements of high efficiency and envirofimental protection, the usage of clean coal technologies for power generating will be an inevitable option and the technologies will occupy the important position in Fujian power industry. This paper puts forward the staged targets and measures of developing and utilizing clean coal technologies, suggests that all government depotments related should give support and guarantee in policies and conditions, and welcome technical and economic cooperation at home and abroad, which is good for co-development of both parties.
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Since Prof. Jorg SCHLAICH from the University of Stuttgart in Germany built the first solar chimney power plant （SCPP） prototype in the early 1980s, research on SCPP technology has aroused worldwide attention from experiment, to theory and then feasibility studies for large-scale commercial application.
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Power supply transformation technology is a required course for new energy major, which is a comprehensive course. Under the traditional teaching mode, students have no concept of waveform, which brings many difficulties to teaching and experiment. A power transformation technology based on PSIM simulation is proposed. Before class, students solve the task of building the simulation model, and then introduce the knowledge points. This can not only make up for the lack of experimental facilities and also stimulate students interest in learning. Classroom teaching practice shows that this method can effectively improve the teaching and experiment efficiency.
文摘Nowadays, the global climate is undergoing great changes, the global population is increasing and the energy problem is becoming more and more serious, so the construction of smart grid has attracted global attention. At present, the main goal of domestic power grid companies is to combine the strong grid structure with intelligent construction. The system mainly includes power generation technology, communication technology, automatic regulation technology, etc.
文摘With the rapid development of society, the world is gradually developing towards economic globalization, and the people's quality of life and level are getting higher and higher. While bringing more help to people's high-quality life, the problem of energy scarcity is becoming more and more prominent, which has a serious adverse impact on the further development of society. Because solar energy is inexhaustible and can be obtained in different regions, it has become a new type of energy and an indispensable part of human development and use. With the rapid development of modern society, the application of solar photovoltaic power generation technology can greatly reduce the energy consumption.
文摘With the continuous development of the Times and the continuous innovation and progress of science and technology, under the social background of socialism with Chinese characteristics into a new era, China's primary, secondary and tertiary industries have achieved unprecedented development. Both show a thriving momentum of development, and the momentum of economic development also shows a rapid trend. However, with the continuous development and progress of the society, under the premise that innovation has become the core driving force guiding all walks of life, the traditional natural resources and energy are obviously no longer suitable for the current development trend. Based on this, the exploration and effective application of new energy technology has become the core elements leading the future development of various industries. This paper focuses on the application field and application direction of new energy photovoltaic power generation technology, through comprehensive, multi-angle and layered analysis, and strives to provide practical suggestions and specific measures for the deep application of new energy photovoltaic power generation technology, and then help the further development of new energy photovoltaic power generation technology.
文摘For the railway power supply system, divided into power traction power supply and signal auxiliary system power supply, and in the general name, the two power supply mode called power supply system and distribution system. According to the different power supply equipment, the main function of power supply system is to provide power for locomotive running, while the main function of distribution system is to provide power for some equipment (interval equipment) along the railway. These two power supply modes exist independently and do not interfere with each other. At the same time, when supplying power to the interval equipment, most of the equipment is powered by independent power supply, including the main power distribution and standby power distribution, which are switched through the electrical control circuit. However, in the traditional distribution mode, the overall stability of the power grid is required to be high. If the electric energy of the power grid often fluctuates, it will cause the distribution failure of the equipment in the interval, resulting in the effectiveness of the equipment. Therefore, it is necessary to improve the stability of the interval distribution system and select a more reliable distribution mode. Photovoltaic power generation is a way of railway power supply, whether it is feasible to be applied in railway interval distribution system needs continuous research. Based on this, this paper takes photovoltaic power generation technology in the application of railway interval distribution system as the entry point, and discusses the way of its application, hoping to bring certain reference significance to the application of interval distribution system.
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.
