Project_PrincipleOverview_G_YunNan_2025/ModeDisplay/Assets/StreamingAssets/SubTitles/原理/220kV断路器-二次回路原理.srt

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现在让我们模拟一下线路控制 合上上端的电源空气开关

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假设现在线路处于分闸状态

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此时分闸指式灯点亮

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分闸位置继电器吸合

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而由于两个电器的分压

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致使合闸电磁铁只通电而没有吸合

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这样的好处是既可以显示分闸状态

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同时可以检测合闸电磁铁是否正常

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当合闸电磁铁损害时 分闸指示灯会熄灭

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手动合闸时

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我们将旋钮旋至手动合闸位

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电首先到达KKJ继电器让其吸合

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经二极管 吸合合闸保持继电器和合闸电磁铁

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此时由于电会走捷径

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分闸指示灯熄灭

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分闸位置继电器复位

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其合闸自保触点也会吸合

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自保触点用于当旋钮复位后

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线路一直保持合闸电磁吸合

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防止中途一半停止

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直到合闸完成

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此时断路器常闭触点分开

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常开触点吸合

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致使合闸回路全部熄灭

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而合闸指示灯亮起

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合闸位置继电器吸合

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同样由于分压

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电经过分闸电磁铁

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却由于电压过低无法吸合铁芯

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手动分闸时

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旋钮打到手动分闸

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此时电到达KKJ继电器

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此继电器是保持继电器

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合闸时亮起

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直到分闸信号到达熄灭

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可将辅助触点做为备用

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用于重合闸的先决条件

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后经二极管往上

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此二极管是利用其单向导通性

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防止电从别的入口进入影响我们线路控制

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使两套跳闸保持继电器和分闸电磁铁吸合

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两个系统只要任何一个吸合均能保持分闸的正常运转

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两个分闸自保辅助触点也吸合

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合闸指式灯会熄灭

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合闸位置继电器也会复位

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分闸完成后

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断路器常开触点分开

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常闭触点吸合 分闸指示点亮 线路回到最初位置

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当远程合闸时

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将旋钮打到远程位

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此时5、6、7、8接通

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当远程合闸入口吸合时

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同样会吸合KKJ继电器

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和合闸电磁铁

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让异地控制成为了可能

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我们假设线路此时出现了短路故障

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我们装设的两套微机保护保护的保护跳闸入口

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只要任何一个吸合

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线路经保护连片 可继续走我们的分闸线路 完成跳闸

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由于高电压效线路故障百分之八十的故障是瞬时的

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我们的两套微机保护会提供重合闸功能

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让重合闸入口吸合

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线路会到达合闸电磁铁完成一次重合闸

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大大提高了线路的可靠性

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当远程分闸时

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将远程分闸入口常开点吸合

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线路会进行分闸操作

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假设我们在没有完成分闸时

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重合闸或者本地误操作了合闸

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此时电会首先到达防跳跃继电器

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让其吸合

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并自锁

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导致合闸回路的防跳跃辅助常闭点打开

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切断了合闸回路

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使合闸电磁铁不能吸合

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保护了断路器的机械结构和误操作

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当失误恢复后

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而分闸系统不受影响

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会继续完成分闸

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直到分闸完成

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其双电源控制系统

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利用两套不同电源的直流屏

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形成两套电源一用一备

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平时用主控制电源

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电源检测和控制继电器吸合

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当主系统电源出现故障时

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继电器复位

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而另一套电源接通

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继续控制我们的线路

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使控制系统的可靠性进一步增强