浙江电力

2021, v.40;No.297(01) 61-66

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基于稳态电场分析的冷缩中间接头结构优化
Structure Optimization of Cold Shrink Joint Based on Steady-state Static Electric Field Analysis

陈子涵,时亨通,高承华,郭然,邱方驰,姜林福
CHEN Zihan,SHI Hengtong,GAO Chenghua,GUO Ran,Qiu Fangchi,JIANG Linfu

摘要(Abstract):

冷缩中间接头在配电网中应用广泛,其电气性能受结构设计、原材料性能、安装工艺、运行环境等因素影响;结构设计是影响中间接头电气性能的首要因素,需充分考虑其合理性及可优化性。以8.7 kV/15 kV冷缩中间接头为例,采用相同结构的应力锥,针对不同结构屏蔽管和不同绝缘厚度,利用有限元法计算稳态电场分布,优化中间接头结构。仿真结果表明:中间接头内部电场分布受增强绝缘厚度、屏蔽管厚度、屏蔽管倒角等因素综合影响;屏蔽管厚度一定时,采用多段弧倒角的电场均匀效果更佳;增强绝缘厚度相同或适当增大时,采用切削反应力锥结构的电场均匀效果与采用屏蔽管结构的最优值相接近,但中间接头主体单边厚度可减小。
Cold shrink joints are widely used in distribution networks and the electrical performance is affected by structure design, material property, installation technology and operation environment, among which structure design plays a leading role and demands reasonableness and optimization. This paper takes 8.7 kV/15 kV cold shrink joint with same stress cone structure for example. In view of the different screen tubes and insulation thickness, the finite element method is used to calculate steady-state electric field distribution to optimize the joint structure. The simulation result shows that the inner electric field distribution of the joints are affected by the combination of reinforced insulation thickness, screen tube thickness and screen tube chamfer; for screen tube with fixed thickness, it demonstrates better performance with multiple segmentation chamfer; for joint with the same or increased reinforced insulation thickness, the counter stress cone structure takes on even electric field effect similar to the best result of screen tube structure, while the total joints' thickness is significantly reduced.

关键词(KeyWords): 冷缩中间接头;增强绝缘;屏蔽管;电场分布;结构优化
cold shrink joint;reinforced insulation;screen tube;electric field distribution;structure optimization

Abstract:

Keywords:

基金项目(Foundation): 中国南方电网有限责任公司科技项目(SZKJXM20190057)

作者(Author): 陈子涵,时亨通,高承华,郭然,邱方驰,姜林福
CHEN Zihan,SHI Hengtong,GAO Chenghua,GUO Ran,Qiu Fangchi,JIANG Linfu

DOI: 10.19585/j.zjdl.202101010

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