Abstract:

The transmission tower-line system is an important lifeline project as high voltage electric powers carrier. A four-step recursive calculation method of subsystem was proposed for the analysis on the system reliability of the transmission line crossing high speed railway, on ground of the safety requirements of high speed railway on transmission line. And then the system reliability of two crossing tension sections of transmission line, with angle steel tower structure or steel tube tower structure respectively, was analyzed. It is indicated that the proposed four-step recursive calculation method is effective. The system reliability of transmission line with steel tube tower structure, which is dominated by the reliability of tower members, is more than that with angle steel tower structure. The system reliability of a tension section in transmission line can be upgraded by increasing the importance factor of tower components, reducing the span of tangent tower or the angle of angle tower.

Key words: high speed railway, transmission line, tension section, system reliability