Transient Ground Potential Rises at a nuclear fusion experimental power plant hit directly by a lightning strike

Ruan, Winston; Fortin, Simon; Dawalibi, F.P.; Grange, Francois; Journet, Sebastien

doi:10.1109/apl.2011.6111102

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…Every electrical equipment which is located in or near the plant area might be damaged because the ground potential actually rises to thousands of volts above the remote earth potential [3]. However, many simulation works and experiments were done in the past on the GPR occurrence with various methods of testing and grounding system configurations [4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Effects of Various Earth Grid Configurations on Ground Potential Rise Caused by Lightning Strike

Madrin

Supriyanto

Widyaputera³

et al. 2019

IJORAS

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Ground Potential Rise (GPR) caused by lightning strike is a potential hazard for electrical equipment inside an oil and gas refinery plant. In order to mitigate the risk, horizontal grounding grid is applied. The best mitigation is to install a grounding grid with mesh size as small as possible. This condition requires a high cost. In order to obtain the optimal mesh size, a series of simulation of a grounding grid with mesh size variations on GPR caused by lightning strike has been carried out. CDEGS software was used to observe the GPR with various mesh size from 6.5 x 6.5 m to 20 x 20 m. Simulation results show that the maximum transient GPR rises as the grounding grid mesh size is increased, while the GPR distribution throughout the grounding grid area does not change much for different mesh sizes. In the other hand, decreasing the grid size would mean that more conductors are required, hence the cost would increase accordingly. The result shows that grid sizes from 6.5 x 6.5 m up to 20 x 20 m have no significant difference in term of GPR. In term of cost, 10 x 10 m does not show significant difference with 20 x 20 m, on the other hand, there is a significant difference for grid sizes 1 x 1 m to 10 x 10 m. From the results, grid sizes between 10 x 10 m up to 20 x 20 m are still applicable as stated in Petronas Technical. To comply with proper GPR value, additional protection devices are needed to protect the electrical equipment from potential damage.Keywords –GPR, grounding grid, mesh size

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Section: Introductionmentioning

confidence: 99%

Effects of Various Earth Grid Configurations on Ground Potential Rise Caused by Lightning Strike

Madrin

Supriyanto

Widyaputera³

et al. 2019

IJORAS

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“…The co-construction of mobile base station and substation may solve the problem of independent transformers, and to provide the thought of deep cooperation for the electric power department and telecommunication. According to the current study, the effects of lightning current to the base station were studied when mobile base stations struck by the lightning [1][2], the transient response of lightning strike to the substation ground network were researched in the literature [3][4][5], and the electromagnetic interference of switch operation of substation to secondary cable and the substation short-circuit fault were also studied [6][7][8]. Meanwhile, the related issue of the co-construction has not been clearly researched at home and abroad.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the disturbance voltage and gpr in substation and mobile base station co-construction

Long¹,

Jia²,

Diao

et al. 2016

MATEC Web of Conferences

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Abstract.It is essential to consider the electrical safety protection distance when the mobile base station and the substation are building together. This paper makes an analysis from three aspects: the influence on the disturbance voltage of the secondary cable in substation when the station is struck by lightning; the influence on the base station grounding grid caused by the station switching operation and short circuit faults. According to the relevant national and international standards, the electrical parameters are calculated when the substation and mobile base station grounding grid connected in different ways and different distance. The conclusion of the paper provides a theoretical basis for engineering construction with much higher practical value. Meanwhile, it is of great significance to develop the win-win co-operation between the power and telecommunications operators and to explore the diversified businesses of electric power.

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Investigation of transient voltages in a Tokamak building hit by lightning

Grange¹,

Journet²,

Dawalibi

et al. 2011

2011 7th Asia-Pacific International Conference on Lightning

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The ongoing international Tokamak (nuclear fusion) demonstration project (ITER) will be housed in a building supported by a 17 m deep complex seismic isolation pit. This 120 m long and 90 m wide pit will house the anti-seismic foundations of the future Tokamak Complex. Safety to persons in contact with the building and damage to the anti-seismic foundation structures due to repeated lightning strikes is a major concern and must be prevented by adequate lightning bonding and grounding mitigation measures. This paper describes the results of a detailed study of the response of the Tokamak building structures and associated anti-seismic pit foundations structures to lightning strikes. This paper focuses on the transient response and related safety aspects.

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Transient Ground Potential Rises at a nuclear fusion experimental power plant hit directly by a lightning strike

Cited by 5 publications

References 10 publications

Effects of Various Earth Grid Configurations on Ground Potential Rise Caused by Lightning Strike

Effects of Various Earth Grid Configurations on Ground Potential Rise Caused by Lightning Strike

Analysis of the disturbance voltage and gpr in substation and mobile base station co-construction

Investigation of transient voltages in a Tokamak building hit by lightning

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