串联谐振型故障限流器对开合空载线路过电压的影响  

Influence of Series-resonant Type FCL on Switching Overvoltage of Off-load Transmission Line

作　　者：刘洪顺[1] 吕婷婷 韩明明[1] 邹亮[1] 张黎[1] 李清泉[1] 

机构地区：[1]山东大学电气工程学院特高压输变电技术与装备山东省重点实验室,济南250061 [2]国网山东省电力公司检修公司,济南250022

出　　处：《高电压技术》2015年第10期3392-3399,共8页High Voltage Engineering

基　　金：国家自然科学基金(51507095);山东大学基本科研业务费专项资金资助项目(2014GN033)~~

摘　　要：串联谐振型故障限流器的应用将改变系统自振频率,其对开合超高压空载线路操作过电压的影响有待深入研究。首先,仿真分析了安装故障限流器前后合闸空载输电线路末端过电压波形,理论计算了线路末端过电压自由分量振荡周期、工频分量和自由分量幅值与限流电抗的数学关系,定性总结了不同限流电抗对合闸空载输电线路末端过电压的影响规律。其次,考虑断路器电弧有无发生重燃,分别分析了安装故障限流器前后开断空载线路末端电压波形,得到了电弧重燃时过电压瞬时峰值、自由分量振荡周期与限流电抗的关系曲线。研究结果表明,随着限流电抗的增大,合闸过电压最大值保持不变,开断过电压最大值及开合过电压上升率均呈下降趋势,串联谐振型故障限流器的安装有利于超高压空载线路的开合。The applications of series resonant type fault current limiter （SRFCL） may change the natural frequency of a system. And its impacts on switching overvoltage of off-load EHV transmission line need further investigation. Firstly, the terminal overvoltage waveforms of switching on off-load line are simulated in the presence and absence of SRFCL. The relationship of free component oscillation period, fundamental component amplitude, free component amplitude and cur- rent limiting reactance are gotten by theoretic calculation. The law of the influence of different current limiting reactance on terminal voltage of switching on off-load line is summarized. Secondly, considering arc re-ignition occurs or not, the terminal overvoltage waveforms of switching off off-load line in the presence and absence of SRFCL are analyzed. When arc reignites, the relationship curves between instantaneous maximum of overvoltage, free component oscillation period and current limiting reactance are presented. The research results show that the maximum of switching on overvoltages remains unchanged and the maximum of switching off overvoltage, as well as the rise rate of them presents downtrend as current limiting reactance increases. The installation of SRFCL is benefit for switching EHV off-load line.

关 键 词：串联谐振型故障限流器 空载线路 操作过电压 限流电抗 振荡周期 电弧重燃 

分 类 号：TM471[电气工程—电器]