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CN1554953A 基于瞬时功率的变压器励磁涌流和内部故障电流的识别方法 无效 - 撤回

基于瞬时功率的变压器励磁涌流和内部故障电流的识别方法
摘要：
本发明涉及一种变压器的励磁涌流和内部故障电流的识别方法。通过分析变压器两侧三相瞬时功率之差的不同频率分量，利用各分量之间的相互关系对变压器的励磁涌流和内部故障电流进行识别。该方法能够有效区分变压器励磁涌流和内部故障电流，尤其是对于变压器内部发生小匝比故障具有较高的识别灵敏度。
摘要（英）：

The identifying method for transformer exciting surge and internal failure current is to analyze the different frequency components of the differential instantaneous triphase power on two sides of the transformer and to identify the transformer exciting surge and the internal failure current based on the mutual relation of the components. The method is effective, and especially has high identifying sensitivity in judging the small turn ratio failure inside transformer.

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