Dianci bileiqi我国城市中压配网电容电流骤增，消弧线圈补偿能力不足导致接地故障电弧难以自熄问题突出；且城市复杂的线路走廊环境及配电网实际运行状态等因素导致单相接地故障特征不明显，易发生误选、漏选问题。文中对小电流接地系统单相接地故障快速熄弧和选线技术进行综述，首先对其暂态过程中和稳态下的故障点电流、中性点电压以及馈线零序电流等关键物理量进行理论推导，分析了接地电弧特性及数学模型。然后，阐述了常用熄弧装置的基本结构和工作原理，并针对无源电流型熄弧装置电容电流监测的准确性、消弧线圈调节的精度和时效性问题 ...
李景丽 +5 more
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