摘要
中压电缆中间接头的几何参数是其结构设计和电场分布仿真分析研究的关键。分析了9个不同厂家中间接头的结构,计算了各尺寸参数的统计量,分析了各厂家间中间接头结构尺寸的分散性。选择相关结构参数,对中间接头的实际结构进行了建模仿真,研究了不同的设计参数对电场强度的影响。在保持其他参数一致的情况下,发现高压屏蔽层与主绝缘和电缆绝缘交界处的最大场强随着高压屏蔽层长度L2的增加而增大,当两厂家中间接头的高压屏蔽层长度相差50 mm时,最大场强的相对增长率达到了16.66%。应力锥与主绝缘交界处的最大场强随着主绝缘厚度d1的增加而增加,当两厂家中间接头的主绝缘厚度相差4.16 mm时,最大场强的相对增长率为7.36%。高压屏蔽层厚度d2对中间接头场强影响较小。所提的中间接头结构尺寸为中间接头的设计和仿真研究提供了重要的基础数据,并为中间接头的优化提供了思路。
The geometric parameters of intermediate joints of medium voltage cables are the key to their structural design and electric field distribution simulation and analysis studies.In this paper,the structures of intermediate joints from nine different manufacturers are analyzed,and the statistics of each dimensional parameter are calculated to analyze the dispersion of structural dimensions of intermediate joints among manufacturers.The actual structure of the intermediate joints is modeled and simulated by selecting relevant structural parameters,and the effects of different design parameters on the electric field strength are investigated.While keep⁃ing other parameters consistent,it is found that the maximum field strength at the junction of the high-voltage shield with the main insulation and the cable insulation increases with the length L2 of the high-voltage shield,and the relative growth rate of the maximum field strength reaches 16.66%when the difference in the length of the high-voltage shield between the intermediate joints of the two manufacturers is 50 mm.The maximum field strength at the intersection of the stress cone and the main insulation increases with the main insulation thickness d1,and the relative growth rate of the maximum field strength is 7.36%when the difference of the main insulation thickness between the intermediate joints of the two manufacturers is 4.16 mm.The high voltage shield thickness d2 has less effect on the field strength of the intermediate joints.The proposed intermediate joint structure dimensions provides important basic data for the design and simulation study of intermediate joints.It also provides an idea for optimization of intermediate joints.
作者
孙欣宇
王宜静
杨浩烁
吴楚岩
岳战兵
卢斌先
SUN Xinyu;WANG Yijing;YANG Haoshuo;WU Chuyan;YUE Zhanbing;LU Binxian(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China;Heilongjiang Provincial Government Investment Project Construction Management Center,Harbin 150001,China)
出处
《南方电网技术》
CSCD
北大核心
2023年第6期136-144,共9页
Southern Power System Technology
基金
中国南方电网有限责任公司科技项目(GZHKJXM20180140)
国家重点研发计划资助项目(2021YFB2400602)。
关键词
电缆附件
中间接头
尺寸参数
统计分析
电缆
cable accessory
intermediate joints
dimensional parameters
statistical analysis
cable
