特高压输电线路的工频过电压研究  

Research on Power Frequency Over-voltage in UHV Transmission Line

作　　者：田书[1] 郭芃君[1] 梁京[1] 

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454003

出　　处：《电气技术》2011年第9期18-21,共4页Electrical Engineering

基　　金：河南理工大学实验室开放基金项目(SKJA10082);河南理工大学研究生学位论文创新基金项目

摘　　要：特高压输电线路中的过电压水平直接影响着设备的安全运行,本文以特高压试验工程为背景,结合国内外对特高压工频过电压的研究,利用电磁暂态计算程序ATP-EMTP分别仿真计算了特高压空载线路电容效应引起的工频过电压、单相接地故障过电压。分析了高压并联电抗器装设不同位置时对工频过电压的影响以及在高压并联电抗器补偿的基础上线路两端装设MOA后对单相接地故障过电压的影响。仿真结果表明合理装设高压并联电抗器后可以把线路工频过电压降到1.135p.u.;单相接地故障引起的过电压最严重时可达到1.317p.u.,利用MOA后可将其过电压幅值降低到1.045p.u.。The level of over-voltage has an effect on the equipment security in UHV transmission line, based on UHV transmission line project, in this paper applies the domestic and foreign research in UHV power frequency over-voltage. The capacity effect of unloaded line and single-phase grounding fault was investigated, the methods, which influence the over-voltage were simulated and compared by ATP-EMTP. The effect of power frequency over-voltage is analyzed when high voltage parallel reactor is installed different spot and base on installed the high voltage parallel reactor, the effect of single-phase grounding fault over-voltage when the line both side with MOA. Simulation results show that the power frequency over-voltage can be suppressed to 1.135p.u. when properly installing the high voltage parallel reactor on the line; single-phase grounding fault is 1.317p.u. respectively. When MOA are applied the line, the over-voltage can be suppressed to 1.045p.u..

关 键 词：特高压 工频过电压 高压并联电抗器 金属氧化物避雷器 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM723