It is the existent of magnetizing inrush current in transformer that differs transformer differential protection from differential protection of other main equipments and transmission lines.

由于变压器励磁涌流的存在，使得变压器差动保护有别于其他主设备及线路的差动保护。

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So far, the core problem of transformer differential protection is still how to precisely identify the magnetizing inrush current.

迄今，变压器差动保护的核心问题仍然是如何准确识别励磁涌流。

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So distinguishing between magnetizing inrush current and fault current correctly is the key to ensure transformer differential relay to operate credibly.

因此，正确识别励磁涌流是保证变压器差动保护可靠运行的关键。

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