Traction power supply system fault location method applied to multiple operation modes

Abstract

The invention discloses a traction power supply system fault location method applied to multiple operation modes. The method comprises the following steps: 1, reclosing is carried out when a traction network line fails, and if reclosing fails, a reactance method ranging principle is adopted for ranging, and if reclosing succeeds, the second step is carried out; 2, the operation mode of the traction network line is judged according to switch position signals, fault uplink and fault downlink are determined according to the specific operation mode, faults can be determined to be T-type faults, F-type faults or TF-type faults, and then according to the fault type of the specific operation mode, adopting of a suction current ratio principle, a reactance method ranging principle, an uplink downlink current ratio ranging principle or a transverse line current ratio ranging principle is determined to calculate the fault distance. When the method of the invention is adopted for traction network line fault location, the fault position can be quickly and accurately positioned, and thus, the fault clearing efficiency can be enhanced, normal power supply can be quickly recovered, and safe operation of the railway can be ensured.

Description

technical field [0001] The invention relates to the field of electrical engineering, in particular to a fault location method for a traction power supply system applicable to various operating modes. Background technique [0002] With the increasing proportion of electrified railway in railway transportation and the increasing number of traction network power supply lines, in order to improve the safety and stability of railway operation, the operation status of traction network lines has attracted more and more attention. As an important part of the electrified railway, the power supply system mainly includes direct power supply, BT (Boost-transformer) power supply and AT (Auto-transformer) power supply. At present, the traction power supply system of AT power supply mode is widely used, and there are many operation modes. When the traction network line fails, it is limited by the variety of AT mode operation modes. Now it is impossible to quickly and accurately find the fa...

AI Technical Summary

Problems solved by technology

At present, the traction power supply system of AT power supply mode is widely used, and there are many operation modes. When the traction network line fails, it is limited by the variety of AT mode operation modes. Now it is impossible to quickly and accurately find the fault point and eliminate it in time. failure, which affects the safety of railway operations

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