特高压输电线路工程同档带电跨越两条220 kV电力线施工方法

摘要

UHV transmission line projects frequently cross high-voltage transmission lines,the construction faces difficulties such as power failure of the crossed line,high security risk level and tight construction period, combined with the construction practice of the Shanghai Temple in Inner Mongolia～Shandong Linyi ±800 kV UHVDC,which uses 8 split, 1 250 large cross-sectional wire with the same file across two 220 kV lines for the first time, introduces the construction method and construction process of the electrified cross over high voltage transmission lines,including construction techniques of cross-program description, live erection and removal of load-bearing cable,net and so on. Engineering practice shows that the construction method has successfully completed the construction of live-over,ensuring construction safety and construction period,provides reference for the future of the same type of live construction and.%特高压输电线路工程跨越高压输电线路频繁,施工面临被跨越线路停电困难、安全风险等级高、工期紧等难题,结合内蒙古上海庙—山东临沂±800 kV特高压直流工程首次采用8分裂1250大截面导线同档带电跨越2条220 kV线路施工实践,介绍带电跨越高压输电线路施工方法及其施工过程,包括跨越方案说明,带电搭设和拆除承力索、护网等施工技术.工程实践证明,该施工方法顺利完成了带电跨越施工,保证了施工安全和工期,为今后同类型带电跨越施工提供借鉴与参考.