摘要
杆塔的准确模拟对特高压变电站反击侵入波幅值影响很大,为使其模拟计算结果更准确,建立了集中电感、单波阻抗和多波阻抗3种1000kV杆塔模型;针对1000kV变电站不同的运行方式,计算分析了雷电反击侵入波。计算结果表明,不同的杆塔模型,其计算结果存在一定的差别;在特高压变电站的雷电侵入波计算中,宜采用多波阻抗模型。
Lightning intruding overvoltage has played an important role in determining the insulation coordination of UHV substations. There are many factors affecting the lightning intruding overvoltage in substation. Tower model is an important factor among those. Accurate modeling of the transmission tower has an important effect on the amplitude of the back--strike intruding wave in UHV substations. With the help of Electromagnetic Transient Program （EMTP）, three 1000kV tower models that is lumped inductance model, single wave impedance model and multi--wave impedance model are built. Aiming at different operating mode of 1000kV substation, the intruding wave overvoltage under different tower models is calculated. The effect of tower model on intruding overvoltage has been studied. The results show that different tower models can result in great differences to the calculation results, these differences can reach about 10%. The single line operating mode would bring higher lightning overvoltage. Hence, reasonable selection of the tower model in the calculation of back-strike intruding wave is very important.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2008年第5期867-872,共6页
High Voltage Engineering
关键词
杆塔模型
集中电感
单波阻抗
多波阻抗
雷电侵入波
特高压变电站
tower model
lumped inductance
single wave impedance
multi--wave impedance
lightning intruding surge
UHV substation
