零残流消弧线圈综述  

Survey of zero-residual-current arc suppression coil

作　　者：李晓波[1] 王崇林[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《电力自动化设备》2011年第6期116-121,共6页Electric Power Automation Equipment

摘　　要：国内实现零残流有2种方法:第一种方法即在谐振接地系统接地相的滞后相接电容或超前相接电感,该方法需在电网一次侧施加能分相操作的开关及相应的电感及电容,同时该方法相当于人为造成了两相经过渡电阻接地的故障;第二种方法即有源注入的方案,该方法选出接地故障的线路,借鉴有源电力滤波的理念来实现零残流。而目前针对谐振接地系统,其选线技术还不太完善,若接地线路错选,则后续接地电流的估算及对有源逆变器的控制等工作都是朝着错误的方向继续前进。另外零残流消弧线圈的被补偿电流是不可测的,因此不能完全套用有源电力滤波器的方案来实现"零残流"。There are two ways to realize the zero residual current in China.One is to add a capacitor in the lagging phase or a inductor in the leading phase of the grounding phase.It needs a split-phase-operating switch and a capacitor or inductor and results in a two-phase grounding fault artificially.The other is to inject current.It selects the faulty line and realizes zero residual current based on concept of APF.As the faulty line selection in resonance grounding system is still imperfect,if the faulty line is improperly selected,the successive grounding current estimation and inverter control will be totally wrong.As the compensation current of arc suppression coil can not be directly measured,the scheme of APF can not be simply applied to realize zero residual current.

关 键 词：消弧线圈 零残流 自动跟踪补偿 电容电流 谐振 接地 

分 类 号：TM475[电气工程—电器]