To solve the problem of locating the multipoint earthing of the transformer core, two novel methods, named as high-frequency method and travelling-wave method, are analyzed and compared in detail.

为对变压器铁心发生的多点接地故障进行准确定位提出了高频法和行波法两种检测方法，并对它们进行了较为详细的分析和比较。

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Two core issues caused transformer differential protection to mal-operate are studied in the paper.

本文针对变压器差动保护导致误动的两大核心问题展开了研究。

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