摘要
超导电缆的中间接头是影响电缆寿命的主要因素之一。为了研究中间接头在制造和施工环节中造成的缺陷对高温超导电缆的影响,文中在电场数值计算分析的基础上利用有限元仿真软件对不同缺陷进行仿真建模,分析了绝缘层划伤、绝缘层杂质、超导带焊接毛刺3种典型施工缺陷对接头内电场分布的影响规律。结果表明,绝缘层划伤存在空气隙时,最大场强随着空气隙厚度增加而减小;绝缘层残留杂质时,杂质周围电场畸变最严重;超导带焊接毛刺的位置及大小对最大场强有较大影响。3种缺陷结构参数对缺陷周围的最大场强有较大影响,结构参数变化均会引起最大场强的较大变化。研究结果可以指导超导电缆中间接头的施工工艺。
The connector of the superconducting cable is one of the main factors affecting the life of the cable,in order to study the influence of the defects caused by the intermediate joints in the manufacturing and construction process on high-temperature superconducting cables. Therefore,based on the numerical calculation and analysis of electric field,the finite element method is used to simulate different defects and analyze the influence of three typical construction defects on the electric field distribution in the joint,such as the scratch of insulation layer,the impurity of insulation layer and the welding burr of superconducting tape.The result shows that the maximum electric field intensity decreases with the increase of air gap thickness when there is air gap caused by scratch of the insulating layer. When the insulating layer has the impurities,the electric field distortion around the impurities is the most serious. The tape welding position and the size of burr have great influence on the field intensity of the welded area. The three defect structure parameters have a great influence on the maximum field strength around the defect,and the structural parameter changes will cause a large change in the field strength. The research results can guide the construction process of the superconducting cable intermediate joint.
作者
党卫军
孙奇珍
薛艺为
丁璨
曾文凡
方春华
DANG Weijun;SUN Qizhen;XUE Yiwei;DING Can;ZENG Wenfan;FANG Chunhua(Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Guangzhou 510620,China;College of Electrical Engineering and New Energy,China Three Gorges University,Yichang 443002,China)
出处
《电力工程技术》
2020年第5期23-29,共7页
Electric Power Engineering Technology
基金
国家自然科学基金资助项目(51607103)。
关键词
超导电缆
中间接头
典型缺陷
电场分布
电场畸变
superconducting cable
middle joint
typical defects
distribution of electric field
distortion of electric field
作者简介
党卫军(1971),男,学士,高级工程师,从事配电运行管理、配电自动化管理等相关工作(E-mail:603156025@qq.cm);孙奇珍(1984),女,硕士,工程师,从事配电技术、供电可靠性、电能质量管理等相关工作;薛艺为(1990),男,硕士,工程师,从事输变电设备和电力电缆外绝缘相关工作。
