Analysis and fault location of single-pole ground fault in LVDC ungrounded system

Guiyu Li; Jianhua Wang; Yiyun Guo; Xiaokuan Jin; Tao Fan; Yuanliang Fan; Xinghua Huang

doi:10.1117/12.3030544

5 June 2024 Analysis and fault location of single-pole ground fault in LVDC ungrounded system

Guiyu Li, Jianhua Wang, Yiyun Guo, Xiaokuan Jin, Tao Fan, Yuanliang Fan, Xinghua Huang

Proceedings Volume 13163, Fourth International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2024); 131633U (2024) https://doi.org/10.1117/12.3030544
Event: International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2024), 2024, Xi'an, China

Abstract

This paper establishes the single-pole ground fault equivalent circuit of the LVDC ungrounded system, theoretically derives the single-pole ground fault characteristics of the ungrounded system, and obtains the voltage and current dynamic characteristic equations after the single-pole ground fault equivalent circuit. Based on the fault characteristics, a global harmonic signal injection method for active fault identification is proposed to extract the harmonic voltage and current signals after the fault, and use the impedance characteristics to locate the fault. This article not only gives the fault detection process, but also describes the harmonic signal injection method and selection principle in detail. Finally, a simulation model was built in MATLAB/Simulink for verification.

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

Citation Download Citation

Guiyu Li, Jianhua Wang, Yiyun Guo, Xiaokuan Jin, Tao Fan, Yuanliang Fan, and Xinghua Huang "Analysis and fault location of single-pole ground fault in LVDC ungrounded system", Proc. SPIE 13163, Fourth International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2024), 131633U (5 June 2024); https://doi.org/10.1117/12.3030544

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