Abstract
Corrosion is an inevitable problem of metallic grounding grids. To propose an effective method avoiding the above corrosion, a new type of non-metallic grounding material was made in this paper. It is called flexible graphite composite grounding material, namely flexible graphite composite grounding material for short. It is made by high-purity flake graphite with a stranded wire hierarchical structure. And a series of experiments have been carried out to verify its feasibility as electrical grounding material, including material resistivity and its contact resistance measurement, temperature tolerance test, mechanical performance test, and scaled electrical grounding test of several typical electrical grounding grids. These experimental results all indicate that characteristics of the new flexible graphite composite grounding material can well meet practical electrical engineering requirements.
Highlights
The structure and manufacturing process of this material are introduced, and the electrical, mechanical, temperature, and corrosion tests of flexible graphite composite grounding material (FGCGM) are introduced in detail
It is significant for elaborating the characteristics of the new non - metallic grounding material, and it is necessary for FGCGM to be widely applied in power systems
The increment of FGCGM resistance and splicing resistance was lower than 3% under three typical impulse currents
Summary
Tao Huang 1, Yuanchao Hu 2*, Hongping Xie 1, Changqing Du 1, Yunzhu An 2*, Wentao Shen 1, Zhixiang Liu 2 and Meng Cheng 1. To propose an effective method avoiding the above corrosion, a new type of non-metallic grounding material was made in this paper It is called flexible graphite composite grounding material, namely flexible graphite composite grounding material for short. A series of experiments have been carried out to verify its feasibility as electrical grounding material, including material resistivity and its contact resistance measurement, temperature tolerance test, mechanical performance test, and scaled electrical grounding test of several typical electrical grounding grids. These experimental results all indicate that characteristics of the new flexible graphite composite grounding material can well meet practical electrical engineering requirements
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