摘要
在±800kV直流输电工程中,新的换流站将位于海拔1000m以上的地区,为保证上述设备可靠运行,需对设备的外绝缘水平进行海拔修正。文章介绍了国内外采用的海拔修正方法,详细比较了各种修正方法对设备绝缘水平的影响,重点分析了对海拔超过1000m地区的设备外绝缘耐受电压和污闪电压进行修正的方法,并通过比较分析给出了适于对特高压直流换流站设备外绝缘水平进行海拔修正的方法。
In China＇s first ＋800kV UHVDC project, new converter stations will be located at the area with the altitude higher than 1000m. To ensure secure and reliable operation of equipments configured in these converter substations, the attitude correction of external insulation level of these equipments should be made. The authors present the methods for attitude correction applied home and abroad, compare the impacts of various correction methods on insulation level of equipments, and pay special attention to the methods which correct the withstand voltage and pollution flashover voltage for external insulation of equipments configured in the area with attitude higher than 1000m. By means of comparative analysis, the method suits to attitude correction for external insulation level of equipments configured in UHVDC converter stations located in the area with attitude higher than 1000 m is given.
出处
《电网技术》
EI
CSCD
北大核心
2008年第13期1-4,共4页
Power System Technology
关键词
±800KV直流输电
海拔修正
换流站
外绝缘水平
耐受电压
污闪电压
±800 kV UHVDC； altitude correction,converter station, external insulation level； withstand voltage；pollution flashover voltage
