Abstract It is well known that the tendency of the smart grid constructing is more reliable, secure and efficient. Advancement in power electronics technology provides an important approach for such purpose. Therefore, this paper studied on the application of advanced power electronics in smart grid. The demand of smart grid for advanced power electronics technology and the research and development trend... It is well known that the tendency of the smart grid constructing is more reliable, secure and efficient. Advancement in power electronics technology provides an important approach for such purpose. Therefore, this paper studied on the application of advanced power electronics in smart grid. The demand of smart grid for advanced power electronics technology and the research and development trend of advanced power electronic technology was introduced firstly. Then the principle of power electronics technology and its applications in smart grid was presented, with emphasis on the application of FACTS (Flexible AC Transmission Systems) technology, HVDC (high voltage DC Direct Current) transmission system technology and power quality technology in smart grid. The security, efficiency and reliability of that smart grids which had applied advanced power electronics were evaluated. The result shows that application of the advanced power electronic technology can strengthen and optimize the grid, ensure the safety of power grid stability and promote the utilization of renewable energy. Read More Read Less

Abstract Field bus is an extension of network communication technology, so it is a hot spot in the field of automation. Field bus technology provides strong technical support for reliable data transmission. CAN is one kind of field bus technology, and other communication bus, it has obvious superiority in the distributed control. Field bus technology marks the beginning of a new... Field bus is an extension of network communication technology, so it is a hot spot in the field of automation. Field bus technology provides strong technical support for reliable data transmission. CAN is one kind of field bus technology, and other communication bus, it has obvious superiority in the distributed control. Field bus technology marks the beginning of a new era in the industrial control technology. It includes computers, automation, communications and other technical fields, being in continuous improvement and perfection. Because of its flexibility, it is widely used in the production of life. With the development of technology, CAN field bus technology have been unified international production standards. The paper focus on the combination of field bus and Ethernet, field bus real-time performance, choice of field bus, field bus integration, field bus network architecture and development of field bus networks, and deeply discusses the issue. This paper analyzes the characteristics of CAN field bus, and the design of the electrical control system based on CAN field bus. Read More Read Less

Abstract Urban public transport throughout the city transportation system is an important part of its development level is a measure of an important symbol of urban modernization, but also the best way to solve the problem of traffic congestion in cities. And to select the optimal route bus network model of urban public transport is an important subsystem, public transport priority... Urban public transport throughout the city transportation system is an important part of its development level is a measure of an important symbol of urban modernization, but also the best way to solve the problem of traffic congestion in cities. And to select the optimal route bus network model of urban public transport is an important subsystem, public transport priority guaranteed perfect, Rationalization of its urban land use structure has important significance. Now combine development level and trend of urban public transport system, the paper analyzes the public transportation system model structure, operating characteristics and timetables property, from network connectivity features characteristic transfer bus stops, bus lines and arcs characteristic time several charges aspects elaborate. Passenger bus travel will consider their own preferences, trip purpose a variety of factors, the external environment, the best network analysis based on the least time and obstacles the least time is the best path analysis, this paper expounds the GIS in urban traffic network the important function of the optimal path analysis, in the hope of using GIS network analysis technology to build urban intelligent traffic network system, provide a solid foundation for the development of urban facilities and based on their experience and the limited information on real-time access to comprehensive judgments. Papers from the passenger travel process starting behavioral psychology, analyzed the factors affecting passenger bus travel path selection principles and metrics, and analysis of empirical investigation of Wuhan bus, redefined the optimal path selection bus trip principle. Read More Read Less