电瓷避雷器Issue(3)：75-83,9.DOI:10.16188/j.isa.1003-8337.2025.03.010
考虑电场非均匀性的多腔室并联间隙等效间距计算方法研究
Calculation Method of Equivalent Spacing of Multi-Chamber Parallel Gap Considering Electric Field Non-Uniformity
蔡永翔 1肖小兵 1何肖蒙 1邓明海 2李华鹏 1何心怡1
作者信息
- 1. 贵州电网有限责任公司,贵阳 550002
- 2. 重庆大学电气工程学院,重庆 400044
- 折叠
摘要
Abstract
With the advantages of fast response speed,good arc extinguishing performance,and effective suppression of the impact of lightning impulse on power grid equipment,the multi-chamber parallel gap can serve as a supplement to lightning protection measures for distribution network lines.The multi-chamber parallel gap is different from the parallel gap.Its lightning impulse flashover path is complex,and the overall discharge characteristics of the device are not fully obtained,making it difficult to set the discharge gap reasonably.However,the improper setting of discharge gap will cause the failure of light-ning impulse flashover localization,resulting in arc burning insulator.In order to study the lightning im-pact flashover localization conditions for multi-chamber parallel gaps,the author simulated and analyzed the electric field non-uniformity of multi-chamber arc extinguishing structure.According to the simula-tion results,it is proposed to equate the multi-chamber arc extinguishing structure to a rod-rod air gap.And further carried out the lightning impact flashover test of the multi-chamber extinguishing structure,according to the lightning impulse 50％discharge voltage the lightning impulse obtained by the test,the calculation formula of the equivalent air spacing of the multi-chamber arc extinguishing structure is ob-tained by fitting.At last,the accuracy that adopting this calculation method to design the lightning impact flashover localization of multi-chamber parallel gap is verified by voltage-time characteristics test.The test results show that the lightning impact flashover can be located on the multi-chamber parallel gap after reasonably setting the length of the external series air gap according to the fitting calculation formula,so as to protect the insulator from arc burning.The calculation method proposed can be used for the selection of the external series air gap length in the overall structure of the 10 kV multi-chamber parallel gap.关键词
多腔室灭弧结构/电场非均匀性/棒-棒空气间隙/等效间距/外串联气隙长度Key words
multi-chamber arc extinguishing structure/electric field non-uniformity/rod-rod air gap/equivalent air spacing/length of external series air gap引用本文复制引用
蔡永翔,肖小兵,何肖蒙,邓明海,李华鹏,何心怡..考虑电场非均匀性的多腔室并联间隙等效间距计算方法研究[J].电瓷避雷器,2025,(3):75-83,9.
