【摘要】 V型合成绝缘子串是紧凑型线路的重要组成部分,具有重量轻、易清洗、抗拉强度高的优点以及稳定的后屈曲抗压能力。文中主要目的是研究330kV紧凑型线路中V型合成绝缘子串的力学荷载特性。首先基于大挠度理论分析了受压V型合成绝缘子的力学特性,并根据大屈曲试验确定了合成绝缘子破坏时对应的轴向压缩量以及对应该压缩量的破坏应力,然后进行V型合成绝缘子串的力学荷载试验,研究了夹角变化过程中,位移、轴向压缩量以及最大应力随载荷比的变化关系,确定了紧凑型线路设计时优先选用的V型串夹角,为紧凑型线路设计提供理论指导。最后,基于文中的理论分析和试验结果,确定天成330kV紧凑型线路设计中选用65°作为V型合成绝缘子串夹角。更多还原

【Abstract】 V type composite insulator string, which has advantages of light weight, easy cleaning, high tensile strength and stable post buckling, is a key component of compact line. The main destination of this paper is to study the loading characteristics of V type composite insulator used in 330kV compact line. Firstly, the mechanical characteristics of compressed composite insulator are studied based on the large flexivity theory, and the compression amplitude is measured in the large flexivity experiment. Therefore the destruction stress of composite insulator is calculated based on large flexivity theory and the compression amplitude responding to destruction. Secondly, displacement along x and y direction, axial compression amplitude and stress with loading ratio and included angle are studied in mechanical loading experiment. In addition,the preferred included angle of V type composite insulator string is suggested so as to guide the design of compact line. Finally, the composite insulator string with 65° included angle is adopted in the design of Tian-Cheng 330kV compact line based on theoretical analysis and experiment presented in the paper.更多还原