Analysis on the fire accident of the turf substation caused by the transfer of potential in the substation

Yi Su; Qian Li; Xiaofei Xia

doi:10.1117/12.2635135

25 April 2022 Analysis on the fire accident of the turf substation caused by the transfer of potential in the substation

Yi Su, Qian Li, Xiaofei Xia

Author Affiliations +

Proceedings Volume 12244, 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022); 122443F (2022) https://doi.org/10.1117/12.2635135
Event: 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022), 2022, Guilin, China

Abstract

The fault current through ground grid would cause maldistribution of ground potential rise, with the harm of transfer potential between the substation and outside concerned about more than Substation Interior Transfer Potential. Taking the two events of lawn fire in 220kV Enping Substation for example, by calculating the transient ground potential rise distribution inner the substation during 110kV Entian Line single phase ground fault outside the substation, we point out the substation interior transfer potential would form a high transient potential difference, there brings a high risk of spark discharge if the conductors are close enough. The solution against substation interior transfer potential is given based on insulation, such as the better management of low-voltage lines and keeping enough distance between the lawn and ground conductor, the full-metal outgoing line frame also in favor of the ground potential difference improvement.

Citation Download Citation

Yi Su, Qian Li, and Xiaofei Xia "Analysis on the fire accident of the turf substation caused by the transfer of potential in the substation", Proc. SPIE 12244, 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022), 122443F (25 April 2022); https://doi.org/10.1117/12.2635135

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