计及工频电压的特高压变电站雷电侵入波过电压分析  

Analysis on UHV Substation Lightning Intruding Over-voltage Considering Power Frequency Voltage

作　　者：陈水明[1] 王威[1] 于化鹏[1] 杨鹏程[1] 

机构地区：[1]清华大学电机系电力系统及发电设备控制和仿真国家重点实验室,北京100084

出　　处：《高电压技术》2010年第8期1852-1857,共6页High Voltage Engineering

基　　金：国家自然科学基金(50737001)~~

摘　　要：线路的工频电压越高对雷电侵入波过电压的影响就越大,我国现行的计算雷电侵入波过电压的规程都没有考虑线路的工频电压。为了研究计及工频电压的特高压变电站侵入波过电压,基于淮南1000kV特高压GIS变电站,采用电磁暂态计算程序PSCAD/EMTDC建模并研究了不同的工频电压对变电站雷电侵入波过电压的影响。结果显示,工频电压对雷电侵入波过电压的影响显著。因此,提出了3种考虑工频电压的计算方法:均匀分布法、正态分布法和比例法,由3种计算方法得到的统计过电压的值分别为2364、2459、2271kV。通过比较可知,比例法是一种较为合理的方法,推荐电力系统采用比例法设计特高压变电站的绝缘水平。The power frequency voltage is not under consideration in regulations for calculating lightning over-voltage in China. To research the effect of power frequency voltage on lightning over-voltage, we constructed a PSCAD/ EMTDC model basing on Huainan 1000 kV UHV substation. The results indicate that this kind of effect is too remarkable to ignore. Consequently, three methods to consider power frequency voltage are discussed, i.e. uniform distribution method, normal distribution method and proportional distribution method. They result in different overvoltages, 2364, 2459 and 2271 kV, respectively. Through comparison, proportional distribution method is relatively reasonable, and it is recommended in UHV substation insulation design.

关 键 词：工频电压 雷电侵入波过电压 特高压变电站 绝缘水平 计算方法 比例法 

分 类 号：TM862[电气工程—高电压与绝缘技术]