Direct-current protection fault tracing implementation method and system based on S7 measurement and control unit

Abstract

The invention discloses a direct-current protection fault tracing implementation method and a system based on an S7 measurement and control unit. The system comprises a basic logic control system, a protection logic operation system, a real-time data acquisition system, an event record file generation system, a data arrangement file generation system and a waveform and event record viewing system.The basic logic control system is connected with the protection logic operation system to output event information to the event record file generation system; and the protection logic operation system is connected with the real-time data acquisition system to output fault data information to the data arrangement file generation system. Events and data information in the event record file generation system and the data arrangement file generation system are downloaded as offline data files, and the offline data files are imported, read and displayed as a waveform and event record list by the waveform and event record viewing system. By adopting the S7 high-end measurement and control unit, the system has the characteristics of high reliability, easiness in maintenance and intelligence, realizes a perfect protection fault tracing function, and is more economical than domestic protection devices.

Description

technical field [0001] The invention relates to the field of rail transit traction DC power supply systems, in particular to a method and system for implementing DC protection fault traceability based on an S7 measurement and control unit. Background technique [0002] With the rapid development of urban rail transit in China, DC traction power supply technology has been widely used and improved. Protection devices developed for DC equipment at home and abroad emerge in endlessly. , equipment stability, etc. tend to be perfect, but at the same time, its development and use costs are generally high. With the continuous development of technology and the technology of design, production, operation and maintenance of the national subway system equipment has become mature, how to choose a safe, reliable, perfect performance, operation Stable hardware alternatives have become an urgent need for major equipment manufacturers. [0003] At present, although the PLC controller and t...

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Problems solved by technology

[0003] At present, although the PLC controller and the supporting display unit used as the DC protection of rail transit basically realize the functions of control, detection, protection, display and upload, and meet the basic needs of the application, if the power supply line fails and triggers the protection action, it cannot Record the data changes when the fault occurs, so it is impossible to identify the authenticity of the fault, which brings troubles to the timely processing and analysis of on-site faults for operators

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