Chen Xiaochuan

The research on main protection for DC feeder line of subway

This paper evaluates all kinds of main protections for DC feeder line of subway and points out their drawbacks. On the base of analyzing characteristics of current under tow load and short-circuit in DC traction power supply of subway, it presents a main protection-rate-of-current-rise protection (di/dt- /spl Delta/ I). Then, the characteristics of ROR (rate-of-current-rise) protection and the principle of setting are given. By simulation, it is proved that the design of ROR protection is rational.

Development of test and simulation software kit of integrated automation for traction substation

This paper discusses a new practical real-time software testing and simulating of integrated automation for traction substation. This software is used both to operate human-machine interface and also to test and simulate for protection devices. Then the software kits system configuration, functions, dispose flow, technique characteristics and test results are all be described.

Study on integrated automation system of traction substation for express railway lines

The structure and function of integrated automation system of traction substation for express electric railway lines developed by our university are discussed in this paper. The paper mainly describes the function installation of monitoring and communication unit, video monitoring and control unit and intelligent protection, measurement and control unit. Finally, the application of the system to electric railway lines in China is introduced.