Research Of Calculation Method For RBC Setting And Capacity In CTCS-3

RBC (Radio Block Centre) is the core ground subsystem of the CTCS-3 (China Train Control System). With speeding up the construction of the passenger dedicated line with CTCS-3 train control system, the engineering design of RBC is not only the effective theoretical basis in high-speed railway construction, but also the important guarantee of security in a running train. However, as the cost of RBC devices is high and their calculation of setting and capacity only depends on experience, there is no reliable method and standard now. Therefore, it is very necessary to research the calculation method of RBC setting and capacity. By analysis of the parameters of RBC's own capacity, the dissertation proposes a new calculation method of RBC setting and capacity and gives the simulation to verify its correctness.Based on the description of the RBC system's structure and function, by the comparative analysis of RBC, which is produced by different company, it is proposed that a new selection method of RBC devices capacity parameters based on GSM-R network technology. Then, the parameters which are selected by new method are used to solve RBC setting problem. By analysising of control objects, the range of control for RBC and system parameters, the dissertation proposes the calculation method of RBC devices setting focus on the three aspects of basic principles, which are control ability, interface capability and maintenance of the applicability.Petri net is a network information flow model. Graphical symbols can be used not only the relationship of the event between cause and effect, but also that the system's dynamic behavior, so when the ability of the interface is being analysised, using Petri Net technology to simplify the communication process of RBC through interfaces with other systems. The network models are built to get the state transition matrix and interaction time. With the analysis of simulation, the result shows that the designed formulas can use the interaction time to calculate RBC interface capability effectively.For ease of maintenance and management, the principle of centralized setting is adopted by RBC. But in the issue of remote switch and the RBC settings in large station, it can not guarantee the accuracy of RBC setting. Therefore, for these issues, it is proposed the two programs of multi-station in one line and multi-parts in one station. According to the analysis of related factors of RBC such as control ability, the formulas of RBC train control ablity are given to calculate the number of trains in RBC's control range. Finally, using the datas of Wuguang and Zhengxi passenger dedicated line to simulate the calculation method, it is simulated that this method is effective and feasible in the calculation method of the train control ability of RBC. Based on RBC system's own capacity, by calculating the interaction time in interface ability and the number of trains in control ability, application of the proposed new method can effectively solve the problem of RBC setting and provide an effective basis for RBC engineering design.