摘要
某同塔双回500 kV架空输电线路导线阻尼间隔棒采用双板框架结构,存在次档距振荡、间隔棒大量损坏等问题。通过研究阻尼间隔棒工作原理、统计线路沿线气象条件及间隔棒缺陷分布规律,结合缺陷间隔棒现场解体检查情况,分析得出间隔棒缺陷的主要原因为间隔棒布置平均次档距较大、线路次档距振荡较严重、间隔棒线夹铰链销防退出措施不足,以及阻尼结构固定措施与框架限位方式选择不当。基于设备缺陷原因,提出了减小间隔棒平均次档距至45 m的治理措施,实施后,该输电线路运行稳定,再未发生此类故障。
Double plate frame structure is adopted for conductor damper spacer of a 500 kV overhead transmission line with double circuit on the same tower,which has the defects of subspan oscillation and large amount of spacer damage.The working principle of spacer damper is analyzed,the meteorological conditions along the line and the distribution law of spacer defects are analyzed.Combined with the site disassembly inspection of defective spacer,it is concluded that the main causes of spacer defects are large average subspan of spacer arrangement,serious vibration of line subspan,insufficient anti-withdrawal measures of hinge pin of spacer clamp,and fixing measures and frames of damping structure improper selection of frame limit mode.Based on the cause analysis of equipment defects,the treatment measures to reduce the average subspan of spacer to 45 m are given.After implementation,the transmission line operation is stable,and there is no such fault again.
作者
赵建利
贾新民
张捷
王森
赵建坤
ZHAO Jianli;JIA Xinmin;ZHANG Jie;WANG Sen;ZHAO Jiankun(Inner Mongolia Power Research Institute,Hohhot 010020,China;Inner Mongolia Enterprise Key Laboratory of High Voltage and Insulation Technology,Hohhot 010020,China;Inner Mongolia Electric Power(Group)Co.,Ltd.,Hohhot 010010,China)
出处
《内蒙古电力技术》
2020年第5期25-29,共5页
Inner Mongolia Electric Power
基金
内蒙古电力(集团)有限责任公司科技项目“内蒙古电网输电线路典型风振区线路风振综合防治技术研究”(510141200020)。
关键词
架空输电线路
四分裂间隔棒
阻尼失效
铰链销
次档距振荡
overhead transmission line
quad-bundled spacers
damping failure
hinge pin
subspan oscillation
