电瓷避雷器Issue(1)：80-86,7.DOI:10.16188/j.isa.1003-8337.2025.01.010
分层土壤下架空地线架设方案对感应雷过电压的影响
Influence of Overhead Ground Wire Erection Scheme on Induced Lightning Overvoltage Under Layered Soil
王科 1胡逸 2徐肖伟 1杨庆3
作者信息
- 1. 云南电网有限责任公司电力科学研究院,昆明 650217
- 2. 云南电网有限责任公司电力科学研究院,昆明 650217||输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆 400044
- 3. 输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆 400044
- 折叠
摘要
Abstract
The influence of different schemes of overhead ground cables installed under horizontal strati-fied soil on induced lightning overvoltage is studied,providing reference for lightning protection design of actual 10 kV overhead distribution lines.By establishing a 2-D finite difference time domain(2-D FDTD)algorithm model and combining with Agrawal coupling model,the induced lightning overvoltage of overhead distribution line is calculated.The algorithm was employed to examine the impact of various horizontally stratified soil properties on the lightning protection of overhead ground lines and the impact of various overhead ground line erection strategies on lightning-induced surges for 10 kV single triangle distribution lines under such soil structures.The results show that:1)the thickness of the top soil layer has a stronger influence on the size of the lightning-induced surge on the line when the top soil layer's conductivity is low,therefore the impact of the layered soil cannot be disregarded in the calculations for lightning protection projects.2)the induced lightning overvoltage suppression range of single loop trian-gular alignment line with single grounding wire and double grounding wire is 7.8%-27.2%and 12.0%-41.2%,respectively.3)the dual overhead ground wire installed 0.6 m above the meso-phase wire has the best overall effect on the suppression of induced lightning overvoltage on the single-loop triangular arrangement line.关键词
感应雷过电压/架空配电线路/2维时域有限差分算法/Agrawal耦合模型/水平分层土壤/架空地线Key words
induced lightning overvoltage/overhead distribution lines/2 dimensional finite difference time domain algorithm/Agrawal coupling model/horizontal layered soil/overhead ground line引用本文复制引用
王科,胡逸,徐肖伟,杨庆..分层土壤下架空地线架设方案对感应雷过电压的影响[J].电瓷避雷器,2025,(1):80-86,7.
