摘要
电缆接头压接质量直接决定着电缆线路的安全运行。然而,现有的液压压接方式受限于机械工艺、技工经验等因素,难以确保电缆接头的可靠压接。为此,尝试将电磁脉冲成形技术引入电缆接头的压接,成功研制出一套新型电缆接头压接装置,其最大放电能量为28 kJ、最大工作电压为20 kV。在此基础上,开展70 mm^2电缆与接头的压接实验,分别从接头的力学性能和电学性能两个方面对电磁脉冲成形技术与现有液压技术进行对比分析,同时还探讨了充电电压对压接电缆接头性能的影响规律。结果显示:电磁脉冲成形技术可实现电缆接头的有效压接。在一定充电电压(12 kV)下,相较于液压压接方式,电磁脉冲成形技术所压接的电缆接头拉伸强度至少提升35%,而接头处电阻降低则达36.15%。实验还发现,压接接头的拉伸强度和接触电阻与充电电压存在一定依赖关系,随着充电电压的提高,压接接头的拉伸强度随之增强,接触电阻则随之减少。此外,还通过仿真研究对上述现象予以解释。
The connection quality of cable joints directly determines the safe operation of cable lines.However,the existing hydraulic methods are limited by manual construction quality,mechanical technology and other factors.It is difficult to ensure the reliable connection of cable joints.Therefore,by introducing electromagnetic pulse forming technology into connection of cable joints,we designed and developed a new compression device for cable joints with the maximum discharge energy of 28 kJ and the maximum working voltage of 20 kV.On this basis,the compression experiments of 70 mm^2 cables and joints were carried out.The electromagnetic pulse forming technology and the existing hydraulic technology were compared and analyzed from the mechanical and electrical properties of the compressed joints.The influential law of charging voltage on the performance of the compressed cable joints was also discussed.The results show that electromagnetic pulse forming technology can be adopted to effectively connect the cables with the joints.Under a certain charging voltage(12 kV),compared with that by the hydraulic technology,the tensile strength of cable joints compressed by electromagnetic pulse forming technology increases by at least 35%,while the connection resistance of the compressed joints decreases by 36.15%.It is also found that,with the increase of charging voltage,the tensile strength of the compression joint will increase while the connection resistance will decrease.The simulation also verifies the experimental results.
作者
李成祥
杜建
陈丹
周言
王现民
姚陈果
LI Chengxiang;DU Jian;CHEN Dan;ZHOU Yan;WANG Xianmin;YAO Chenguo(State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,China;Yongchuan Power Supply Branch,State Grid Chongqing Electric Power Company,Chongqing 402160,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2020年第8期2941-2950,共10页
High Voltage Engineering
基金
重庆市研究生科研创新项目(CYB19018,CYS19041)。
关键词
电缆接头
电磁脉冲成形
压接装置
力学性能
电学性能
cable joint
electromagnetic pulse forming
connecting device
mechanical property
electrical property
作者简介
通信作者:李成祥,1979—,男,博士,研究员,博导,主要从事电力设备在线监测及故障诊断、生物医学中的电工新技术、脉冲强磁场工业应用技术等研究工作,E-mail:lichengxiang@cqu.edu.cn;杜建,1994—,男,硕士,从事脉冲强磁场工业应用技术等研究工作,E-mail:20134174@cqu.edu.cn。
