串联谐振型故障限流器对开合空载线路过电压的影响

发布时间：2018-03-04 02:24

本文选题：串联谐振型故障限流器　切入点：空载线路　出处：《高电压技术》2015年10期 　论文类型：期刊论文

【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。
[Abstract]:The application of series resonant fault current limiter will change the natural frequency of the system, and its influence on the operating overvoltage of UHV no-load line needs to be deeply studied. The over-voltage waveform at the end of no-load transmission line before and after the fault current limiter is installed is simulated and analyzed. The mathematical relations between the oscillation period of the free component of over-voltage at the end of the line and the amplitude of the power frequency component and the free component and the reactance of the limiting current are calculated theoretically. The influence of different current limiting reactance on the over-voltage at the end of closed no-load transmission line is summarized qualitatively. Secondly, considering whether the arc of circuit breaker has reburning, the voltage waveforms at the end of no-load transmission line before and after the fault limiter are analyzed respectively. The relation curves of instantaneous peak voltage, free component oscillation period and current limiting reactance during arc reburning are obtained. The results show that the maximum closing overvoltage remains unchanged with the increase of limiting reactance. The maximum switching overvoltage and the rising rate of on-off overvoltage are decreasing. The installation of series resonant fault current limiter is beneficial to the opening and closing of UHV no-load line.
【作者单位】：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;国网山东省电力公司检修公司;
【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)~~
【分类号】：TM471

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