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基于温度计算的肘型电缆接头压接状态评估方法(PDF)

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

Title:: Assessment method of crimp status of elbow cable joint based on temperature calculation

作者:: 马海涛; 牛海清; 黄世杰; 等; (1.华南理工大学电力学院，广东广州 510641；2.浙江中新电力工程建设有限公司，浙江杭州 311201）

Author(s):: MA Haitao; NIU Haiqing; HUANG Shijie; et al; （1. School of Electric Powers, South China University of Technology, Guangdong Guangzhou 510641, China;2. Zhejiang Zhongxin Power Engineering Construction Co., Ltd., Zhejiang Hangzhou 311201, China)

Keywords:: elbow cable joint; crimp status assessment; multi-physical field simulation; transient temperature; temperature-rise test

摘要:: 附件是电缆线路的薄弱环节，温度是反映电缆运行状态的重要参数，研究环网柜中肘型电缆接头运行温度具有重要意义。建立柜内肘型接头三维暂态磁热流耦合场数学模型，基于阶跃电流温升试验验证了模型的正确性；仿真研究了夏季严酷场景肘型接头多物理场及其温度时空分布，研究了肘型接头外皮温度和温差的影响因素。结果表明，肘型接头外皮温差受环境温度和负荷曲线形状的影响较小，与负荷电流峰值近似呈二次关系，与压接电阻比率基本呈线性单增关系，因而可以作为识别肘型接头压接状况的参数。最后提出基于接头外皮温差的肘型接头压接状态评估方法，对接头温度监测和故障预警有重要的参考价值。

Abstract:: Accessories are the weak link in the cable line. Temperature is an important parameter to reflect the running state of the cable. It is of great significance to research the operating temperature of elbow joint in the ring net cabinet. A mathematical model of the three-dimensional transient magnetic-heat-flow coupling field of elbow joint in cabinet is established, and its calculation correctness is verified based on the step current temperature rise test. The multi-physical field distribution and temperature temporal and spatial distribution of elbow joints in harsh summer is simulated, and different factors on the temperature and temperature difference of elbow joints are studied. The results show that the skin temperature difference of elbow joint is less affected by the ambient temperature and the shape of load curve, and has a quadratic relationship with the peak load current, and increased linearly with the resistance ratio, which can be used as the parameter to identify the crimping condition of elbow joint. Crimp status assessment of elbow joint was proposed based on skin temperature difference, which has important reference value for the joint temperature monitoring and fault warning.

[1] 卢斌先,薛涛,王宜静,等.极端高温下10 kV电缆中间接头载流量分析[J].电力工程技术,2023,42(04):215-222.

[2] 唐国锋,曹丽娟.电缆接头温度远程在线监测系统设计 [J].工业仪表与自动化装置,2018(02):100-104.

[3] 杜清,杨绍才,胡晓. XLPE电缆中间接头内部放电射频信号的时频分析[J].电网技术,2023,47(12):5266-5273.

[4] 王国忠,黄海磊.电缆T型接头击穿原因分析和处置[J].电线电缆,2022(05):55-58.

[5] 罗翔,朱志豪,翟停停,等.用于12 kV环网柜的新型空气绝缘电缆接头研究[J].高压电器,2023,59(09):161-168.

[6] 赵腾飞,聂永杰,孙宬.10 kV环网柜电缆肘型头故障分析[J].山西电力,2022(03):26-29．

[7] 唐科,阮江军,唐烈峥,等.三芯电缆接头温度场计算[J].高电压技术,2019,45(11):3571-3578.

[8] 夏川,刘会家,吴刚梁,等.含防爆盒的三芯电缆中间接头散热性能及载流量研究[J].电测与仪表,2022,59(09):47-52.

[9] 赵莉华,周冬冬,闫志强,等.10 kV交流三芯电缆中间接头直流化改造热-电耦合仿真研究[J].南方电网技术, 2021,15(03):105-112.

[10] 张宏光.10 kV开关柜中单芯电缆接头状态评估及监测系统的研究[D].西安：西安理工大学,2016.

[11] 周文文.10kV固体绝缘开关柜温度监测技术研究[D].广州：广东工业大学,2018.

[12] 仝子靖.环网柜T型连接头温度实时测量方法研究[D].北京：华北电力大学(北京),2018.

[13] 国家技术总监局.电力电缆导体用压接型铜、铝接线端子和连接管:GB/T14315-1993 [S]. 1993.

备注/Memo:: 收稿日期：2024-03-07基金项目：国家高技术研究发展项目(2015AA050201)；浙江中新电力工程建设有限公司科技项目(HDXS3-2110037) 第一作者：马海涛（1999—），男，山东济南人，硕士研究生，研究方向为电气设备多物理场仿真。通信作者：牛海清（1969—），女，陕西富平人，博士，副教授，研究方向为电气设备在线监测与多物理场仿真

更新日期/Last Update: 1900-01-01