电瓷避雷器Issue(5)：127-133,140,8.DOI:10.16188/j.isa.1003-8337.2025.05.016
110kV复合绝缘横担覆冰工况下力学特性分析研究
Analysis and Study on Mechanical Characteristics of 110 kV Composite Insulation Cross Arm Under Ice-Coating Condition
摘要
Abstract
In recent years,the frequent occurrence of extreme weather has caused great security risks to the normal operation of power system.The use of new composite insulated cross arm can effectively im-prove the insulation and mechanical properties of transmission lines.The ice resistance of 110 kV com-posite insulated cross arm is studied by establishing the static finite element analysis model,and the skew degree and stress distribution on cross arm are analyzed.The results show that under the normal ice cover thickness of 5mm,the maximum equivalent stress of 73.97 MPa is generated around the end members,which is 21.44％of the yield strength of the composite cross arm.The maximum displacement of 1.678 7 mm was generated at the end of the tie rod,which reached 7.08％of the allowable skew degree of the cross arm.Different ice thicknesses were set to simulate the operation of the cross arm under re-peated ice conditions,and the analysis of simulation results predicted that the ultimate ice thickness that the composite cross arm could withstand was 30mm.In addition,the stress of the composite cross arm under repeated ice-breaking conditions was further analyzed.The results show that:when the ice thick-ness reaches 30mm,the maximum equivalent stress of the composite cross arm is 274 MPa,which is close to 79.56％of the yield strength of the material.At this time,the equivalent stress of each compo-nent is still within the safe range,and the composite cross arm has good mechanical properties.关键词
复合绝缘横担/机械性能/覆冰工况/有限元分析Key words
composite insulating cross arm/mechanical properties/ice-coating condition/finite element analysis引用本文复制引用
刘敬华,蔡炜,吴雄,李健,孙启刚..110kV复合绝缘横担覆冰工况下力学特性分析研究[J].电瓷避雷器,2025,(5):127-133,140,8.基金项目
国家电网公司科技项目"提升老旧输电线路抗冰和抗台能力的复合绝缘横担关键技术及应用研究"专项基金(编号:5500-202116124A-0-0-00).Project supported by Science and Technology Program of State Grid"Research on key technology and application of composite insulated cross arm to improve ice resistance and typhoon resistance of old transmission lines"(No.5500-202116124A-0-0-00). （编号:5500-202116124A-0-0-00）
