【摘 要】
：
电晕产生无线电干扰预测是高压直流线路设计中的一个重要内容.为此,提出了1种计算这种干扰的瞬态计算方法.首先搭建了直流导线单点电晕放电试验平台,获得了电晕电流脉冲以及
【机 构】
：
华北电力大学新能源电力系统国家重点实验室
【基金项目】
：
国家重点基础研究发展计划(973计划);国家自然科学基金;教育部中央高校基本科研业务费专项资金
论文部分内容阅读
电晕产生无线电干扰预测是高压直流线路设计中的一个重要内容.为此,提出了1种计算这种干扰的瞬态计算方法.首先搭建了直流导线单点电晕放电试验平台,获得了电晕电流脉冲以及脉冲序列的波形.基于这些波形的特点,利用BLT(Baum-Liu-Tesche)方程对电晕电流沿导线的传播过程建立了计算模型.进而基于矩量法建立了场的计算模型,实现了无线电干扰的时域计算.通过与商业软件FEKO的比较验证了该计算方法的准确性.利用该方法对一典型算例进行了计算,结果表明:土壤电阻率和导线长度对无线电干扰的时域特性有较大影响.当土壤电阻率由100 Ω·m增加到1 000 Ω·m时,无线电干扰电场分量增加了约10倍;土壤电阻率由100 Ω·m增加到500 Ω·m时,无线电干扰磁场分量增加了约2.5倍,而土壤电阻率由500 Ω·m增加到1 000 Ω·m时,无线电干扰磁场分量基本上不变;无线电干扰的谐振频率与导线长度成反比.
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