This paper presents the design and testing of a full-scale 330-kV, 210-MVA transformer tank designed to withstand the pressure effects of a 20 MJ, three-cycle low-impedance fault in oil, and fail at its cover in a safe and controlled manner above that amount of energy. The transformer tank, equipped with a mockup active part, was designed for arc resistance using nonlinear static finite-element analysis and a specific rupture criterion. It was then tested using an experimental methodology based on injecting pressurized air into the water-filled tank. To adequately reproduce the effects of an arc in oil, the test parameters were determined using explicit dynamic simulations. The transformer tank performed as predicted by the finite-element and explicit dynamic simulations. The energy levels used in the tests here are, to our knowledge, the largest ever reported. This study demonstrates that it is feasible to design a power transformer to safely withstand high-energy low-impedance faults of short duration.

中文翻译：

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一种耐电弧电力变压器油箱的设计与测试

本文介绍了全尺寸 330-kV、210-MVA 变压器油箱的设计和测试，该变压器油箱设计用于承受 20 MJ、油中三周期低阻抗故障的压力影响，并在保险柜的盖子处发生故障。并控制方式高于该能量。变压器油箱配备有模型活动部件，采用非线性静态有限元分析和特定的破裂准则设计用于抗电弧。然后使用基于将加压空气注入充满水的水箱的实验方法对其进行测试。为了充分再现油中电弧的影响，使用显式动态模拟来确定测试参数。变压器油箱按照有限元和显式动态模拟的预测执行。此处测试中使用的能量水平，据我们所知，有史以来最大的。该研究表明，设计一种能够安全承受短时高能低阻抗故障的电力变压器是可行的。