Power cable fired by transient arcing below the action value of relay protection: An analysis of a medium-voltage cable joint breakdown fault

Hu, Ran; Liu, Gang; Huang, Cheng‐Long; Xu, Zhifeng; Zhou, Wenqing

doi:10.1016/j.engfailanal.2022.107028

Cited by 11 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is found that the initiation and development of electric trees occurring in the silicon rubber insulation are associated with the large circumferential stress of the cable joint and overvoltage induced by closing operation. Recently, Hu et al [16] analyzed a breakdown fault accident of 20 kV cable joint caused by the ablation of the grounded copper mesh. Combined with the circuit simulation model and the finite element method, it is revealed that the transient grounding faults arise from moisture at the internal interface of the cable joint, which may damage the grounding protection line and lead to serious accidents.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Hu et al. [16] analyzed a breakdown fault accident of 20 kV cable joint caused by the ablation of the grounded copper mesh. Combined with the circuit simulation model and the finite element method, it is revealed that the transient grounding faults arise from moisture at the internal interface of the cable joint, which may damage the grounding protection line and lead to serious accidents.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evolution of grounding failure‐insulation failure of 10 kV cable joints: Prerequisites of an explosion in enclosed cable trench

Zhao

Liu

Guo

et al. 2023

IET Generation Trans & Dist

View full text Add to dashboard Cite

An explosion accident in an enclosed cable trench caused by the discharge of 10 kV three‐phase cable joints is discussed. Combined with the disassembly analysis, the fault recording data analysis, and the validation of experiment, the evolution of the cable joint fault is deduced and discussed. The results show that the trigger of the cable joint fault is the creepage discharge at the cross‐linked polyethylene–silicon rubber insulation interface. This results in the partial breakdown and the grounding failure of three‐phase cable joints. Under the long‐term floating potential and current thermal effect, the insulations are gradually ablated and decomposed into a large amount of combustible gas. Finally, the accumulated combustible gas is ignited by the arc caused by a three‐phase short circuit at the moment of the reclosing operation. The analytical method and conclusions proposed in this paper can provide suggestions and guidance to prevent analogous distribution network cable joint fault accidents.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%