电瓷避雷器Issue(6)：111-120,10.DOI:10.16188/j.isa.1003-8337.2024.06.013
多层土壤结构下垂直接地装置在输电杆塔接地中的应用方法
Application Method of Vertical Grounding Device in Grounding of Transmission Tower Under Multilayer Soil Structure
朱子茵 1杨鑫 1焦艺哲 1谢炀 1乐骁文 1刘宇彬2
作者信息
- 1. 长沙理工大学电气与信息工程学院,长沙 410114
- 2. 湖南经研电力设计有限公司,长沙 410114
- 折叠
摘要
Abstract
Aiming at the problems of inconvenient construction of transmission line tower grounding and poor economic benefits of resistance reduction technology in high soil resistivity areas such as mountain rock,the author proposes a three-dimensional transmission tower grounding method with vertical grounding device.The method utilizes the mechanized construction technology of transmission tower foun-dation which is vigorously promoted at the present stage to implant a grounding anchor bolt of a certain length at the fixed point of the grounding ray while the tower foundation is constructed to form a vertical grounding device,which plays the role of reducing resistance and increasing efficiency.In this paper,the model of three-dimensional transmission tower grounding device with vertical grounding device is given,and the numerical calculation method of impulse grounding resistance of transmission tower grounding device considering spark discharge effect is studied.Then,the influence of soil horizontal stratification structure on the impact resistance reduction effect of the three-dimensional transmission tower grounding device is analyzed.Finally,on the basis of the principle and method of soil horizontal stratification inversion,the method of determining the optimal length of vertical grounding device under multi-layer soil structure is obtained by proposing the utilization rate of unit length and analyzing the drag reduction efficiency,and a calculation example is given.The research provides a method guidance for the application of vertical grounding device in three-dimensional transmission tower grounding sys-tem,and offers new idea for the design of tower grounding device.关键词
土壤水平分层/高土壤电阻率/垂直接地装置/冲击接地电阻Key words
horizontal stratification of soil/high soil resistivity/vertical grounding device/impulse grounding resistance引用本文复制引用
朱子茵,杨鑫,焦艺哲,谢炀,乐骁文,刘宇彬..多层土壤结构下垂直接地装置在输电杆塔接地中的应用方法[J].电瓷避雷器,2024,(6):111-120,10.
