Railway self-closing/cut-through line-to-ground fault range count method

A technology of line grounding and fault distance measurement, which is applied in the direction of power lines, transportation and packaging, vehicle parts, etc., to achieve the effects of high detection reliability, accurate measurement, and stable propagation speed

Active Publication Date: 2005-11-02
SHANDONG KEHUI POWER AUTOMATION
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is: it is suitable for non-grounded and arc-suppressing coil grounded systems, not affected by unstable arcs and uneven loads, and can make full use of the existing voltage and current signal transformers of the line without additional additional equipment , a ground fault location method for railway self-closing / penetrating lines that quickly and accurately determine ground faults

Method used

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  • Railway self-closing/cut-through line-to-ground fault range count method
  • Railway self-closing/cut-through line-to-ground fault range count method
  • Railway self-closing/cut-through line-to-ground fault range count method

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Embodiment Construction

[0032] Such as figure 1 Shown: the power supply mode for the driving section: CB is the circuit breaker, quantile; Closed position, each power distribution room M, N is generally powered by dual power supplies, each line in a power supply interval is self-closing, and connected by double-ended power supply M, N power distribution rooms, which are mutually backup. Each control box (electrical centralized equipment) is powered by self-closing and through two circuits, which serve as backups for each other; then the control box provides power for the normal operation of the driving signal.

[0033] figure 2 : Configured for self-closing / through-line voltage and current signal transformers. The self-closing / through bus is equipped with a 3-phase PT (called bus PT), which is used to measure the phase-to-ground voltage of the bus 3 (while providing zero-sequence voltage). A PT is installed on the outside of the circuit breaker at any end of the power supply, called a line PT,...

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Abstract

The earth fault ranging method for automatic on/off circuit in railway belongs to the field of single phase earth fault locating method for small current earth system of electric power network. On-line detectors are installed on two ends of the line, and voltage traveling wave signal the small current earth system in failure generates is transmitted in the voltage signal transformers in the line. The on-line detectors detect the absolute time for the initial failure traveling wave to reach the voltage signal transformers on two ends, determine the time difference, and calculate the precise position in certain equation with the total line length and the traveling wave transmission speed. The present invention has the advantages of being fast and accurate, no influence of unstable electric arc and uneven load, etc.

Description

technical field [0001] The invention relates to a ground fault location method for railway self-closing / penetrating lines, which belongs to the method for locating fault points when a single-phase grounding system of a small current grounding system of a power network is used, and in particular relates to a method for locating fault points when a railway self-closing / penetrating line is single-phase grounding. Background technique [0002] The railway automatic block traffic system is to divide the inter-station section into several block sections through the signal machine, and only one train is allowed to pass through each block section at the same time to ensure traffic safety. After the automatic block is adopted, the time interval of train operation can be greatly shortened, and the driving speed and traffic density can be improved. Due to the traffic safety involved, the reliability requirements of the signal power supply are very high. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60M1/00
Inventor 徐丙垠薛永端李京陈平陈羽刘洪军熊立新
Owner SHANDONG KEHUI POWER AUTOMATION
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