On-line monitoring and fault diagnosis system for traction-transformer-station traction return currents and grounding state

Abstract

The invention discloses an on-line monitoring and fault diagnosis system for traction-transformer-station traction return currents and grounding state. Traction-return-current all path current transformers are connected with a traction-return-current system collecting device; an electrical-equipment-grounding-down-conductor voltage transformer is connected with a grounding-down-conductor data collecting device, a grounding-grid upper-portion-earth-surface-potential reference electrode is connected with a reference-electrode data collecting device, and a soil data collecting device measures a grounding-network-buried-area earth resistivity; a traction-return-current distribution database stores traction-transformer-station traction-return-current all-path real-time currents; an electrical-equipment-grounding-down-conductor potential distribution database stores electrical-equipment-grounding-down-conductor real-time potential; a grounding-grid upper-portion-earth-surface-potential distribution database stores grounding-grid upper-portion-earth-surface real-time potential; an on-line state identifying device outputs the assessment result of the traction return currents and the grounding performance. According to the on-line monitoring and fault diagnosis system for the traction-transformer-station traction return currents and grounding state, on-line assessment of the traction-transformer-station traction return currents and grounding state is achieved, and rapid early warning and accurate positioning of the abnormal state and the fault state are achieved.

Description

technical field [0001] The invention relates to the technical field of electrified railway traction backflow, in particular to an online monitoring and fault diagnosis system for traction substation traction backflow and grounding state. Background technique [0002] Electrified railway has become an important mode of transportation and travel due to its advantages of high efficiency, energy saving and environmental protection. At the same time, the railway is also an important economic lifeline of the country, and its safe and reliable operation has a major impact on the country's politics, economy, and national defense. The traction return system of the electrified railway uses rails, earth, protective wires and integrated ground wires as the main return path. The traction substation is the core infrastructure of the electrified railway. connected to the ground grid. On the one hand, the abnormality or failure of the above-mentioned traction return branch will cause poor...

AI Technical Summary

Problems solved by technology

Most of the grounding grids of traction substations in my country use galvanized flat steel as the grounding conductor, which has poor corrosion resistance. The grounding grids of traction substations flow through a large amount of traction backflow, which is likely to cause serious AC corrosion, increase the grounding resistance, and improve the grounding performance. reduce

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