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发明公开
CN103235234A 一种有消孤线圈系统的接地检测方法 无效 - 撤回

一种有消孤线圈系统的接地检测方法
摘要：
本发明公开了一种有消孤线圈系统的接地检测方法，包括步骤：以基波零序电压Uo为基准,将基波零序电流Io分为：有功分量Ia=Io·cosφ，无功分量Ir=Io·sinφ；按Pa=1/T∫tt+T Uo（t）·Io（t）·dt算出有功功率值Pa；若┃Pa┃≥Pozd，则判定为接地线路，若┃Pa┃
摘要（英）：

The invention discloses a grounding detecting method adopting an arc suppression system. The grounding detecting method includes steps of taking fundamental wave zero sequence voltage Uo including active component I=Icos phi and inactive component I=Isin phi; calculating active power value P according to the P=a/T summa tt+T U (t) I (t) dt; judging a grounded line if /P/>=P, judging an ungrounded line if /P/(0.2-0.3P), wherein the P=0.5P, and the P is active power loss of an arc suppression coil. The grounding detecting method can accurately find out grounded fault lines by judging active component and active power of fault fundamental wave current.

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