摘要
对三峡电站8回500kV线路跨越船闸时,线下工频电场和磁场以及线下架设保护网后对电场的屏蔽效果,进行了详细计算。计算表明,离水面10m以内的场强,同相序布置时不超过3.28kV/m,逆相序布置时不超过1.33kV/m;在跨越线路下装设保护网后,线下工频电场将明显减小,离水面10m以内的场强以相导线同相序布置时可减小至1.14kV/m以下,逆相序布置时可减小至0.75kV/m以下;4条500kV双回线路同时跨越三峡船闸,在线下装设有保护网的情况下,不影响装载有易燃易爆品的船舶的航运安全;由于线路离水面很高,水面上的工频磁场很小,对航运和人身不构成有害影响。
The power frequency electric and magnetic field distribution and effect of shield net are calculated for three Gorge power station eight circuit 500kV transmission lines at the section crossing shiplock. And no harmful effect on navigation safety caused by the electric and magnetic field is proved.
出处
《电网技术》
EI
CSCD
北大核心
1998年第7期22-26,30,共6页
Power System Technology
关键词
三峡电站
跨越船闸
工频电场
工频磁场
航运安全
Three Gorge power station 500kV transmission lines Crossing shiplock Power frequency electric and magnetic field Navigation safety analysis