Finite element analysis of total electric field distribution on the roof of flat-roofed buildings near HVDC lines

The total electric field on the roof platform of buildings becomes a new and important indicator of the environmental assessment of HVDC projects. In this paper, the upper-stream finite element method is used to simulate and calculate the distribution characteristics of the total electric field on t...

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Bibliographic Details
Published in:Electrical engineering 2023-04, Vol.105 (2), p.1153-1162
Main Authors: Liao, Zhenghai, Xu, Jilai, Wan, Baoquan, Gan, Zheyuan, Wang, Yanzhao, Li, Ni, Liu, Yang, Long, Tao
Format: Article
Language:English
Subjects:
Buildings
Economics and Management
Electric fields
Electrical Engineering
Electrical Machines and Networks
Energy Policy
Engineering
Environmental assessment
Finite element method
Mathematical analysis
Original Paper
Power Electronics
Shielding
Stairwells
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Summary:The total electric field on the roof platform of buildings becomes a new and important indicator of the environmental assessment of HVDC projects. In this paper, the upper-stream finite element method is used to simulate and calculate the distribution characteristics of the total electric field on the roof platform of the flat-roofed building adjacent to an HVDC line, from the factors of material conductivity and three-dimensional structure. The results show that when the conductivity of the building is greater than 10 −10 S/m, it can be regarded as an equipotential body with the ground. Therefore, when the field mill measures the electric field on the roof platform, the field mill can be connected to the building to achieve the purpose of grounding. Otherwise, additional appropriate grounding treatment is required. Moreover, the protrusions such as parapets and stairwells on the roof platform of the building have both distortion and shielding effects on the total electric field. The larger the area of the protrusions, the better the shielding effect, making the total electric field on the roof platform weaker. Therefore, when measuring the total electric field on the roof platform, to avoid the unpredictability of the measurement results of the field mill, the field mill should be arranged in the center flat area at least 2 m away from the protrusions.
ISSN:0948-7921
1432-0487
DOI:10.1007/s00202-022-01722-1