The Communication Module Of Visualizing Protection Development Platform In Traction Power Supply System

Relay protection has been widely used in traction power supply system, however, but in the development of relay protection logic program, there are some problems existing, such as duplication of work, heavy workload, lack of flexibility and applicability. In order to solve these problems, the graphics programming idea was applied to develop protection logic program in this thesis, it can reduce labor intensity, improve the efficiency and reduce the probability of error caused by human factors.The platform discussed in the thesis, use the graphical platform to build PAD (problem analysis diagram) graphics program, and change these program into C language program, through the processing later create executable, through repeated commissioning and validation after downloaded to protect the hardware. The graphical platform can be divided into several parts:graphical interface, protect components, communication components and realization of their interface. This thesis discusses the realization of communication and finishes the communication devices in the library.The design of graphical programming platform of communication component database is the process of design modular element for communication, through the module package into fixed function unit, stored in the database. Communication component is complete data transmission function unit. These components just need programming code according to the data storage. The course of design communication component is the course of module design, these components just need programming code according to the data storage. Then the module package is into fixed function unit. Graphical elements can completely read communication components, through the entirely interface dependent on relation. So, we can think graphical elements are module. Communication components realize the function of information transmission, such as kinds of measurement and status information, kinds of historical records, parameter Settings and the control process, etc. Finally, through a simple simulation system, confirmed the correctness of communication components.