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电磁混合式消弧线圈的全补偿故障消弧原理及其柔性控制策略

, PP. 311-318

Keywords: 磁控电抗器,有源补偿器,故障消弧,全补偿,柔性控制

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Abstract:

随着非线性负荷和电力电子设备等的大量使用,接地故障电流中的有功和谐波分量大幅增加,仅补偿了无功电流后的残流足以维持电弧,易导致过电压及事故进一步发展。本文提出了基于磁控电抗器(MCR)和有源补偿器(APC)的电磁混合式消弧线圈(EHPC),并详细论述了其两种运行状态和全补偿故障消弧原理。分析了扫频法测量对地电容的影响因素,并提出改进措施。理论推导了中性点位移电压、故障相电压和线路零序电流与接地故障电流各分量之间的关系,提出了针对接地故障电流无功、有功和谐波分量的解耦补偿和柔性控制策略。经仿真分析和实验平台验证,接地故障电流能够得到快速有效的全补偿,达到电流和电压双重消弧,表明了本文所述原理和控制策略的正确性和可行性。

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