This paper presents an experimental study of the magnetic effects of steel tanks on different three-phase transformers. Removable steel tanks are designed and built for transformers with distinct sizes and core topologies. Corresponding tanks of nonmagnetic materials are also built to study the effects of tank material. Zero-sequence tests, open-circuit (no-load) tests, ferroresonance, geomagnetically induced current (GIC), and energization (inrush current) tests are performed on the transformers with and without tanks. The results indicate that steel tanks have a significant effect on the zero-sequence impedance, ferroresonance performance, GIC, and no-load losses in steady state, while the tank has no appreciable effect on inrush currents.

中文翻译：

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钢罐磁效应对三相变压器暂态影响的实验研究

本文介绍了钢罐对不同三相变压器的磁效应的实验研究。可拆卸钢罐专为具有不同尺寸和铁芯拓扑结构的变压器而设计和制造。还建造了相应的非磁性材料罐，以研究罐材料的影响。零序测试、开路（空载）测试、铁磁谐振、地磁感应电流 (GIC) 和通电（涌入电流）测试在带油箱和不带油箱的变压器上进行。结果表明，钢罐对稳态下的零序阻抗、铁磁谐振性能、GIC 和空载损耗有显着影响，而罐对涌流没有明显影响。