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The Analysis of the Grounding Device’s Impulse Characteristics Considering Transient Ionization Phenomenon of Soil
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[1]Li Jingli,Guo Liying,Wu Dongya,et al.The Analysis of the Grounding Device’s Impulse Characteristics Considering Transient Ionization Phenomenon of Soil[J].Journal of Zhengzhou University (Engineering Science),2016,37(04):20-25.[doi:10.13705/j.issn.1671-6833.2016.04.005]
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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 37 Number of periods: 2016 04 Page number: 20-25 Column: Public date: 2016-08-31
Title:
The Analysis of the Grounding Device’s Impulse Characteristics Considering Transient Ionization Phenomenon of Soil
Author(s):
Li Jingli1; Guo Liying1; Wu Dongya2; Wang Leilei1; Li Yuanbo1
1. School of Electrical Engineering, Zhengzhou University, Zhengzhou, Henan, 450001; 2. Henan Power Dispatching and Control Center of State Grid Henan Electric Power Company, Zhengzhou, Henan, 450052
Keywords:
CLC:
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DOI:
10.13705/j.issn.1671-6833.2016.04.005
Abstract:
Experiments and actual operation experience show that the impact characteristics of grounding devices are an important factor affecting the lightning performance of transmission lines. Based on the dynamic and distributed soil parameters in the process of soil ionization, the author establishes a finite element model of impact characteristics for typical grounding devices; according to the simulation The calculation results and simulated test results analyzed the impact flow mechanism and flow law of typical grounding devices from the perspective of electromagnetic field; at the same time, the impact law of soil parameters and injection current parameters on the volume of soil ionization area under the action of impact current was quantitatively calculated. The impact of soil ionization on grounding parameters such as grounding resistance, step voltage, and contact voltage of typical grounding devices is analyzed above. The results show that the impact of soil ionization on the characteristics of shock dispersion and shock grounding The area is more obvious. The research results can provide theoretical support for the proposal of new measures to reduce the resistance of transmission line impact grounding.
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