摘要
[目的]随着架空输电线路运行时间增加及设备老化锈蚀程度加剧,锈蚀地线更换作业明显增多。由于架空输电线路交叉跨越较多、锈蚀地线机械性能下降,更换施工存在较高风险,特别是同档跨越多条高压电力线路的情况,因此探讨更换施工的方法、步骤及安全注意事项十分必要。[方法]文章以平果至来宾某500 kV输电线路同档跨越3条220 kV电力线路锈蚀地线更换施工为例,为降低更换过程中的风险,采取导线封网、地线支架安装钢丝绳二道保护、合理设置牵张场、降低地线牵引速度和逐条投退被跨越线路重合闸的措施。[结果]这些措施经现场验证安全有效,可以很好地保护被跨越电力线路的安全,降低施工作业风险。[结论]这些施工中的关键技术对今后开展同类型作业具有重要的借鉴参考意义。
[Introduction]With the increase of operation time of overhead transmission lines and the aggravation of aging and corrosion of equipment,the rusted ground wire replacement is significantly increased.Due to the large cross span of overhead transmission lines and the decrease of mechanical properties of corroded ground wires,there is a high risk in the replacement construction,especially when the same grade crosses multiple high-voltage power lines.Therefore,it is necessary to explore the methods,steps and safety precautions of replacement construction.[Method]Taking the replacement construction of corroded ground wire of a 500 kV transmission line spanning three 220 kV power lines in the same span from Pingguo to Laibin as an example,in order to reduce the risk in the replacement process,the measures were taken,such as wire sealing,two-way protection of steel wire rope installed on the ground wire support,reasonable setting of the traction field,reducing the traction speed of the ground wire and reclosure of the crossing line one by one.[Result]These measures are verified to be safe and effective on site,which can well protect the safety of the power lines across and reduce the risk of construction operations.[Conclusion]These key technologies in construction have important reference significance for future similar operations.
作者
赵港
何森
韦佩才
宋云海
曲治宇
ZHAO Gang;HE Sen;WEI Peicai;SONG Yunhai;QU Zhiyu(Nanning Bureau,CSG EHV Power Transmission Company,Nanning 530028,Guangxi,China;Maintenance and Test Center,CSG EHV Power Transmission Company,Guangzhou 510663,Guangdong,China)
出处
《南方能源建设》
2022年第S01期119-124,共6页
Southern Energy Construction
基金
超高压输电公司科技项目“基于AI边缘计算的输电通道隐患智能识别监测装置研发与应用”(CGYKJXM20190222)
关键词
锈蚀地线更换
同档跨越
输电线路
张力更换
牵张场布置
施工安全
rusted ground wire replacement
spanning in the same gear
transmission line
tension replacement
arrangement of tugging and taking-up site
construction safety
