IEEE Transactions on Power Delivery· 2023Q1
Dynamic Diffusion Model of Stray Current in DC Traction Power Supply System
- 28citations
- Q1SCImago
- 2023year
Short summary
A novel dynamic diffusion model (MTSM) for stray current in DC traction power supply systems, co-simulated with the return system and validated by field experiments, reveals that direct rail grounding in depots and proximity to rivers/lakes significantly worsen ground potential gradients and stray current.
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Key points
- Developed a dynamic diffusion model (MTSM) for stray current in DC traction power supply systems, incorporating multi-layer and massive texture soil.
- Co-simulated the MTSM with the DC traction power supply return system.
- Validated the MTSM using an on-site experiment measuring ground potential distribution.
- Found that direct rail grounding in depots and proximity to rivers/lakes increase ground potential gradient and stray current.
AI-generated from the title and abstract; the full text is not read.
Abstract
The dynamic fluctuation of stray current is the main characteristic of the metro causing harm to surrounding buried metal structures. While establishing the equivalent circuit model of the return system, not only mainline but also metro depot should be considered. The diffusion models of the dynamic stray current of the DC traction power supply system (DTS) in multi-layer soil medium and massive texture soil medium are established. They are co-simulated with the DC traction power supply return system. The massive texture model (MTSM) is verified by an on-site experiment of ground potential distribution. In the case study, the direct grounding of the rail in the depot will deteriorate the ground potential gradient and stray current. When considering the impact of the river or lake, the stray current easily flows to the low resistivity texture soil, the maximum ground potential gradient increases.
The authors' abstract, as published at the source. IEEE Transactions on Power Delivery, 2023 · DOI ↗
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Field: General Engineering
General EngineeringEngineering