Design And Research Of Remote Terminal Units For Railway Electric Power

With the development of railway transportation, traditional electric power networks and power dispatching models in railway can not satisfy the demands of railway transport development. The remote supervisory control technology has been applied in railway power supply and traction power supply based on information technologies such as computer technology, communication technology and automation control technology. The remote supervisory control system for railway not only can improve greatly the degree of automation in the railway power dispatching system for railway, but also can guarantee effectively the supplies of railway stations and relay stations for section signals. The key problem that whether could maintain its stability depends on the remote terminal units running properly. However, the remote terminal units in railway electric power have seldom been studied. For this purpose, the following research work has been completed:Firstly. Under the current situation of speeding up the implementation of high speed railway construction, it has been pointed out that the remote terminal unit is a profound and special part of the remote supervisory control system for railway based on the current situation of railway electric power supply, and these equipments in the remote supervisory control system for railway have some defects during the setting-up and operating;Secondly. The compositions and operating principles in the remote supervisory control system for railway are analyzed in detail and basic functions,working conditions and parameters in the remote terminal system are designed;Thirdly. Based on characteristics of railway electric power supply and some technologies such as automatization, the supervisory control system of electric networks , dispatching of electric networks,microcomputer protection and communications,the fault diagnosis and control systems of remote terminal units in the railway power is proposed according to the principle that faults are reduced to a minimum;Fourthly. Focusing on the problems of formidable working conditions of remote terminal units in railway power, some reasons and characteristics that the interferences generate are analyzed and some anti-interference measures such as software and hardware designs, wiring designs and constructions are applied to guarantee that the remote terminal units can operate steadily;...