Key Technology Research Of Ground Safety Control For Railway Transportation In Metallurgical Enterprises

ABSTRACT:Compared with the national mainline railway, the railway in the metallurgical enterprises (ME) is in a fixed area and its network layout exhibits a planar distribution. It is responsible for the transportation of iron ore, coking coal, molten iron, steel ingot, steel, steel plate and other materials in the factory, and has many characteristics, such as a wide variety of goods to transport, the widely different requirement of transportation timeliness, multiple transportation paths, etc. Moreover, it is frequently renovated for the need of production process. Currently, the interlocking system, which automaticity is low, maintenance cost is high, signal equipment number is large, undertakes the main safety protection of the railway system in ME and does not implement technical innovation with development of the new technology on railway traffic control. These restrict the improvement of the railway traffic command efficiency and the transportation efficiency in ME.According to the characteristics of the railway in the ME and the outdated technology, coupled with the low efficiency and automation of existing system, and referencing to the control technology of high-speed Maglev train, urban rail vehicle and so on, a ground safety control system (GSCS) scheme for the railway transportation in ME is presented in this thesis and the corresponding control strategy is researched. The main research work of this thesis is as follows:First of all, the business process of railway transportation in ME was analyzed, then, the functional requirements of ground safety control was arrived, and a simple new type of GSCS which can reduce the cost caused by the frequent reconstruction was proposed. The field signaling devices of GSCS contain only the switch control unit and the railway crossing control unit whose control terminals are moved wayside and the passive beacon.Secondly, on this basis, a layout principle for field signaling device of GSCS was proposed, and a brand new safety control logic was constructed by the basic concepts and the technology conditions of safety control along with the restricted relationship between the logical object in the control logic.Thirdly, aimed at the particularity of railway transportation in ME such as the widely different requirement of timeliness, multiple transportation goods and multiple transportation paths, a route optimization strategy for railway transportation in the ME was researched to realize the real-time collaborative optimal control of the multi-train route. This strategy is constructed by a time-varying railway network topology, a train route control evaluation function, and a optimal decision on the basis of the bidirectional dynamic programming.Finally, the simulation software of the GSCS realizing the main function is developed and its simulation and verification was done, combined with the existing peripheral simulation test environment and based on existing embedded security hardware platform, meanwhile, the effectiveness of the GSCS and the control and optimization strategy under the simplified wayside equipment conditions is proved by the results.