Research On Strong Wind Monitoring And Train Traffic Control System Of Qinghai-Tibet Railway

Bad wind environment endangers railway transportation enormously. It not only damages railway equipment, causing paralysis of the railway network, but also causes casualties. Qinghai-Tibet Railway from geermu to Lasa with complex climate locates in the hinterland of Qinghai-Tibet Plateau and extreme weather events occurr frequently there, bringing a serious threat to the safe railway operation. The study solves Xinjiang, Qinghai-Tibet Plateau, the eastern coastal areas which affected by typhoons and all domestic rails in other wind zones. It is the present important task of railway industry to ensures the railway transport safety under bad wind conditions and try to make the railway unblocked. Based on the national "Eleventh Five-Year" support plan and some key research projects under the strong windy environment of Qinghai-Tibet railway traffic safety which was issued by the Ministry of Railways, this article establishes a series of winds monitoring and warning system for the characteristics of Qinghai-Tibet Railway's windy environment. The system adapts to Qinghai-Tibet Railway special request, from the real-time monitoring and warning to the formation of speed limit commands for trains to run, and can achieve a timely information exchange of the train through the wind zone, in order to safe passage of trains through the wind zone and to provide an effective basis for decision-making and means for running trains command under windy conditions.The overall design idea is determined that wind monitoring and warning and running trains command system of the Qinghai-Tibet railway driving for the special wind environment along the Qinghai-Tibet railway. The thorough researches are made that include the sub-domain division in the ge-la section along the wind zone, long-distance and real-time wind speed collection, transmission, storage technology, train-wind-road and multi-source information fusion and integration processing technology, train running in the wind zone real-time warning and command decision techniques, wind monitoring and warning and driving command system's diagnosis and maintenance and reliability technology and so on. The overall technical plan of wind monitoring and warning and traffic control system is put forward. The main modules of the system are built.The plateau railway continuous monitoring network system in long strong wind areas, whose scope reaches 1120km is firstly built up using the network communication and control related to advanced technology. The system integrates continuous monitoring of the wind along the system network, the Ministry of Railways TMIS and TDCS Network and Ge-La section Train line adjustment command system network. The whole network system of data between systems owned high-speed, real-time communication functions are realized. Construction of Xining Hai amount of data processing systems achieve a network architecture in the source of all systems of real-time data storage and analysis and processing.All measuring wind-speed stations'location along the Qinghai-Tibet railway and the imformation fusion of the wind speed, road, train and other related information in scope fetch are analyzed comprehensively. The Qinghai-Tibet Railway trains-high winds-roads and other multi-source information fusion methods are established, including the fusion of measuring the wind station location-the variation of wind-traffic information, the fusion of instantaneous wind-average wind-maximum wind-traffic information, the information amalgamation of railway TMIS and TDCS system, and the information fusion of the high wind-the aerodynamic performance of the train-the power performance of the train.By processing various information above, it gets the critical velocity of train operation safety on Qinghai-Tibet railway under special wind conditions. Further more we study and set limit speed of train operation safety under different combination formats of wind speed, railway condition, appearance of trains and quality. According to all above, "decision-making model" with vehicle overturning factor as its main judging criteria is established, which has 74880 kinds of working conditions totally. The algorithm calculates the current real-time engineering for the train running speed in the relevant wind measurement stations which becomes basis for a real-time warning and command of the Qinghai-Tibet railway under the harsh wind environment in decision-making based on operation safety. It sends out a speed limit instruction which conducts current trains to pass the wind area at an allowable speed safely or arrives at an assigned point to avoid the wind by the command system network of operation of trains.The paper developes strong wind monitoring and train traffic control system application software for the plateau railway which has independent intellectual property rights. It includes plateau railway strong wind train traffic control system, monitoring and warning system, real-time limit train speed calculation software, train overturning stability calculation software under strong side winds, train dynamic marshalling monitoring software, plateau railway winds wireless transmission control software, plateau railway wind data processing analysis software, plateau railway real-time forecast wind analysis software.For the high reliability requirements of plateau railway operation under the bad weather, the system realizes the remote automatic monitor and control and fault status information auto storage, constructes the reliability plateau railway operation system including the strong wind monitoring and train traffic control system, ensuring all-weather and high-reliability operation.Since been opened uninterruptedly from July 2006 up to now, the strong wind monitoring and warning system and train traffic control system of the plateau railway are stable and reliable after two-year trial operation. It has directed stopping train or limiting speed many times, guaranteeing the train operation safety and transportation efficiency effectively, providing guarantee to the operation danger of Qinghai-Tibet Railway when comes across strong wind. The system not only provides an effective mean to guarantee the rail safety under the condition that the direction of strong wind is diversity and different to build break-wind walls along rail lines, but also lay an important foundation to solve all of the train operation safety problems in China.