Railway Traction Power Supply Temperature Monitoring System Design And Application

Abstract:Electric traction with its clean and pollution, high power, high efficiency, has become the main direction of China’s railway electrification. So today’s new construction and renovation of railway lines have adopted the electric traction. Railway traction power supply system is set up in the square dedicated to the railway line electric locomotives, EMU provides energy device that consists of many electrical connections, these electrical connection point will occur after a period of operation oxidation and corrosion, resulting increased contact resistance In continuous high current occurs under the effect of overheating, and in severe burning wires, causing power outages, affecting the normal rail transport. Solve overheating electrical connection point temperature is the key to prevent such accidents, to achieve temperature monitoring is to ensure the safe operation of the railway transport important means. For temperature monitoring technology at home and abroad there are many, such as infrared temperature measurement technology, optical fiber temperature measurement technology, wireless temperature measurement techniques and other methods. Where the price of your first two methods, you need to pull the power cord, close-visual installation and blackouts installed, so these two technologies is difficult in some circumstances be promoted. Wireless sensor due to small size, low cost and powerful features make access to information under special conditions to be in many applications, such as in the coal bottom, sensor networks can be achieved through the mine temperature, pressure, and other important parameters of the real-time monitoring. This systematic study of the relevant principles of wireless sensor networks, found a suitable railway traction power supply system for wireless sensor networks-ZigBee. Firstly, the wireless sensor network architecture, the hierarchical model and key technology research, research concluded that power, short delay, network capacity, confidentiality, cost features of ZigBee technology is very suitable for railway traction Temperature monitoring of the power supply system for wireless sensor networks. Then on ZigBee technology for a comprehensive introduction to find a TI’s ZigBee solutions introduced CC2430, and TI’s standard base ZigBee2006dedicated CC2430chip Z-Stack protocol stack for the analysis of the ZigBee protocol network system structure, data transmission, routing mechanisms and routing maintenance, channel configuration functions to achieve in-depth discussion. Railway traction power supply system line temperature detection system design including hardware design and software design aspects. Hardware design includes microprocessor design, sensor design, wireless communication module design, and some other peripheral circuits of the chip selection and design. In software design, the use of TI company provides integrated ZigBee protocol stack Z-Stack, and CC2430-based hardware, the user layer of the protocol has been programmed to carry out the design temperature acquisition and information transmission in wireless sensor node and use the C#language and the SQL server of the software design. And achieved good results.