国内外输电线路元件的安全度设置

Security Level Settings of Conductors,Ground Wires,Insulators and Fittings for Transmission Lines Designed by Related Codes in China and Other Countries

对比了国内外导线、地线、绝缘子、金具的设计原则及设计安全系数,引入了安全度的概念,并推导出安全度计算公式,计算了上述元件的荷载效应比值,结合国内外标准的荷载比值,计算得到各标准导线、地线、绝缘子、金具的安全度,结果表明:对于上述元件,我国标准的设计安全度要高于国外标准,文中所用方法可为研究我国输电线路元件的安全设置水平提供参考。

The design principles and safety coefficients of design for conductors, ground wires, insulators and fittings in the codes issued in China and other countries are compared, the concept of safety level is led in and the computing formula for safety level is deduced. The values of load to effect ratios of above-mentioned components are computed. Based on the value of loading ratio given by the codes home and abroad, the safety levels of conductors, ground wires, insulators and fittings designed according to these codes are obtained. Calculation results show that as for above-mentioned components, the safety levels of those components designed by domestic codes are higher than those of them designed according to the codes of other countries.