Transformer Magnetization under the Influence of Geomagnetically Induced Currents

地磁感应电流（GIC）可能饱和 一个Transformer铁芯，并导致Transformer杂散磁通 暖气 许多这样的事件发生在 1989年3月，K-9太阳磁场扰动。 杂散磁通 Transformer内的分布是复杂的， 涉及很多因素。 一个系统的三维 GIC下Transformer磁链分布的分析 提出了 磁场无处不在， 将计算Transformer。 还有杂散通量模式 作为不同Transformer设计的涡流， 将对配置进行分析和比较。 的 这项研究的目的是揭示基本的 下Transformer磁化机构 GIC的影响，以评估潜在的杂散通量加热 地质脆弱的Transformer单元的可能性。 研究结果将有助于公用事业公司证明 需要对高风险单位采取缓解行动。 制造商可以使用研究结果来审查 他们的设计策略，并介绍可能的设计 考虑到未来减少GIC效应。

Geomagnetically induced currents (GIC) could saturate a transformer core and result in transformer stray flux heating. Many such incidents have occurred during the March 1989 K-9 solar magnetic disturbance. Stray flux distribution within a transformer is complicated and involves many factors. A systematic three dimensional analysis of transformer flux distribution under GIC is proposed. Magnetic fields everywhere inside a transformer will be calculated. Stray flux patterns as well as eddy currents for different transformer designs, core configurations will be analyzed and compared. The objectives of this study are to reveal the fundamental transformer magnetization mechanism under the influence of GIC, to assess potential stray flux heating possibilities of geologically vulnerable transformer units. The research findings will help utilities to justify the needs for mitigation actions on high risk units. Manufacturers may use the research results to review their design strategies and introduce possible design considerations to reduce GIC effects in the future.