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发明公开
CN107919651A 一种抽能电抗器抽能绕组匝间零序保护方法及装置 有权

一种抽能电抗器抽能绕组匝间零序保护方法及装置
摘要：
一种抽能电抗器抽能绕组匝间零序保护方法，该方法包括以下步骤：采集高抗绕组三相电流与抽能绕组三相电流 计算高抗绕组零序电流 抽能绕组零序电流k13I01；若3I02＞k13I01，且3I02＞2I0set，则抽能绕组匝间保护无延时动作；若3I02＞k13I01，且3I02＜2I0set、3I02＞I0set，则抽能绕组匝间保护经延时t动作；若3I02≤k13I01，则抽能绕组匝间保护不动作。本设计提高了抽能绕组匝间故障的灵敏度，同时不受抽能高抗区外故障的影响。
摘要（英）：

The invention relates to a power extraction winding inter-turn zero sequence protection method of power extraction reactors. The power extraction winding inter-turn zero sequence protection method ofpower extraction reactors includes the following steps: acquiring high-voltage reactor winding three-phase current I<.>1A, I<.>1B and I<.>1C and power extraction winding three-phase current I<.>2A, I<.>2B and I<.>2C; and calculating high high-voltage reactor winding zero sequence current 3I01=|I<.>1A+I<.>1B+I<.>1C| and power extraction zero sequence current 3I02=|I<.>2A+I<.>2B+I<.>2C| k13I01, wherein if 3I02>k13I01, and 3I02>2I0set, power extraction winding inter-turn protection has no time delay action; if 3I02>k13I01 and 3I02<2I0set and 3I02>I0set, power extraction winding inter-turn protection takes action through time delay t; and if 3I02<=k13I01, power extraction winding inter-turn protection does not take action. The power extraction winding inter-turn zero sequence protection methodand apparatus of power extraction reactors can improve the sensitivity of power extraction winding inter-turn failure, and cannot be influenced by the failure outside the power extraction high-voltage reactor region at the same time.

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