Work

S-Transform Based Time–Frequency Evaluation of Dynamic Stray Current in Zero-Resistance Converter System

Year: 2025

Type: article

Abstract: In DC urban rail transit, stray current causes unneglectable electrochemical corrosion to metallic structures near running rails. In view of the low-frequency and non-stationary distribution of dynamic stray current due to multiple trains in lines, its signal characteristic is significant for the corrosion degree prediction and mitigation performance evaluation. While zero-resistance converter system (ZRCS) is introduced for stray current mitigation, further evaluation of its mitigation performance is essential to field application. Considering that the Fourier transform processing non-stationary signals cannot estimate its frequency-domain features accurately, this paper introduces S-transform to extract the time–frequency characteristics of dynamic stray current in ZRCS. Moreover, the dynamic stray current mitigation performance of ZRCS is verified through time–frequency analysis results.

Source: Energies

DOI: 10.3390/en18071594

Authors: Xiangxuan Sun, Xiaofeng Yang, Runda Zhao, Zhenshuai Wang, Maolu Chen, Trillion Q. Zheng

Institution: Beijing Jiaotong University

Language: English

Topic: Power Quality and Harmonics

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $3,137