基于数形结合方法的 35kV 电缆中间接头锥面曲线应力锥设计

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中图分类号：TM247.1 文献标识码：A DOI：10.7535/hbkd.2026yx02001

Abstract： In order to solve the problem that thetraditional stresscone adopts thestraightconecurve，whichis easy to cause theunevendistributionofthe electric field insidethecable intermediatejoint，aquadraticconecurve stress cone was designed byusing the number-shape combination method. Firstly，the 35kV cable intermediate joint model was established.Secondly， theelectricfelddistributioncharacteristicsof thestresscone withthestraightconecurveandthequadraticconecurve were comparedand analyzed.Finally，the key structural parameters suchas the winding insulation thickness，cone length，stress conethickness and cone head curvature radius of the quadratic cone curve stresscone were designed.The results show that compared withthe straightconecurve stresscone，the maximum electric field strength insidethejointof the quadratic cone curve stress cone can be reduced by 47.43% at most. When the stress cone winding insulation thickness，cone length，cone curvature radius and stress cone thickness are 10.94mm ， 50.48mm ， 2.3mm and 3.3mm ，respectively，the maximum electric field strength inside the joint can be reduced to 3.32kV/mm ，and the maximum electric field strength of the cone surface can be reduced to 1.67kV/mm . The parametric design of the quadratic cone curve stress cone can more effectively uniform theinteral eletricfieldofthejoint，reduce thepossbityofpartialdischarge，andimprove theoperationeliabilityof the joint. It has reference value for the optimal design of the cable intermediate joint stress cone.

Keywords： insulation techniques; 35kV cable；stress cone cable intermediate joint；electric field analysis；finite element simulation；number-shape combination method

应力锥在接头接续电缆时对疏散电缆绝缘层表面的集中电场发挥着重要作用[]。（剩余11110字）