Electric locomotive grounding detection circuit optimization

Yunnan Li; Xiaolei Shi; Songyang Jiang; Peng Zhou

doi:10.1117/12.3015384

15 March 2024 Electric locomotive grounding detection circuit optimization

Yunnan Li, Xiaolei Shi, Songyang Jiang, Peng Zhou

Proceedings Volume 13079, Third International Conference on Testing Technology and Automation Engineering (TTAE 2023); 130790A (2024) https://doi.org/10.1117/12.3015384
Event: 3rd International Conference of Testing Technology and Automation Engineering (TTAE 2023), 2023, Xi-an, China

Abstract

When the synonymous terminal of the traction transformer is grounded on the secondary side of the electric locomotive ground detection circuit, the DC bus of the traction converter will be charged abnormally before the traction converter starts, resulting in a hidden danger. Therefore, before the pulse is sent, the circuit principle of the ground detection circuit under this working condition is analyzed, the cause of DC bus abnormal charging is found, and the circuit of the existing ground detection circuit is optimized. The semi-physical simulation platform is built, and the optimized grounding detection loop is verified through the platform to monitor whether there is abnormal charging phenomenon in the DC bus under the fault condition. Simulation results show that the optimized grounding detection circuit can effectively solve the problem of DC bus abnormal charging of electric locomotive, improve the safety and stability of traction converter, and the optimized circuit is simple and easy to implement, and has high application value.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yunnan Li, Xiaolei Shi, Songyang Jiang, and Peng Zhou "Electric locomotive grounding detection circuit optimization", Proc. SPIE 13079, Third International Conference on Testing Technology and Automation Engineering (TTAE 2023), 130790A (15 March 2024); https://doi.org/10.1117/12.3015384

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