AT (Autotransformer) line fault ranging system with built-bin GPS (Global Positioning System) module

Abstract

The invention discloses a fault ranging system scheme with a built-bin GPS (Global Positioning System) module of a high-speed electric railway in an AT (Autotransformer) power supply mode. The ranging system can realize the accurate synchronization of a clock without the match of a GPS pulse signal node of another device, has simple external wiring and is practical and convenient, and the accurate clock synchronization of the built-in GPS is an important link for ensuring the ranging accuracy, can greatly save human and material resources for searching fault points, lighten the labor intensity of a railway power supply maintenance department, troubleshoot as soon as possible, recover power supply and reduce loss due to power failures. Under the background that high-speed railways are the focus of railway construction, the invention inevitably creates favorable economic benefits.

Description

technical field [0001] The invention relates to the field of traction power supply systems for electrified railways, in particular to the field of AT traction power supply systems for high-speed electrified sections. This invention is applicable to electrified railway traction substations, AT substations, switching substations and partition substations that adopt the power supply mode of parallel autotransformer (AT), and realizes the positioning, type discrimination and direction of various types of faults in the AT power supply mode catenary discriminant function. Background technique [0002] With the implementation of my country's "Medium and Long-Term Railway Network Planning", especially in the context of the global financial crisis, my country has added another 2 trillion yuan for railway construction, and my country's railway construction has ushered in a new round of peaks. AT power supply The system is favored by designers of modern high-speed railways for its own ...

AI Technical Summary

Problems solved by technology

[0003] Problem 1. There is no GPS time synchronization: Due to the limitation of processor capacity and capacity, or the delay of communication line channels and routing, it is necessary for the main station and each sub-station along the line to reserve the effective value buffer of the channel within a certain time limit, in order to ensure the distance measurement Accuracy, it is necessary to extract the data of each site at the time of the failure, and it is not enough to maintain clock synchronization only by the protocol software

[0004] Question 2. There is GPS time synchronization: In order to improve the time synchronization accuracy, some manufacturers currently use external GPS modules. There are two situations: the first is that for conventional GPS time synchronization systems, other protection, measurement and control devices in the station are used. The configured GPS plug-in receives GPS satellite synchronization data to ensure the data synchronization of each device (the GPS plug-in is installed in other protection measurement and control devices), and the GPS plug-in is equipped with a GPS satellite receiving module, which outputs the second time synchronization pulse and the serial port time synchronization message to the MMI plug-in; Two, for all GPS time synchronization systems with integrated automation

Whether it is the first or the second type, it is time-synchronized through an external GPS, and the wiring in the station is complicated, which requires the cooperation of other devices or equipment.

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