论文标题
在地磁干扰研究中正确建模生成器加速变压器状态的效果
The Effects of Correctly Modeling Generator Step-Up Transformer Status in Geomagnetic Disturbance Studies
论文作者
论文摘要
为了正确建模地磁电流（GIC）流的影响，必须正确建模发电机升级（GSU）变压器状态。在功率流研究中，由于GSU变压器状态对功率流的结果几乎没有影响，因此通常会在不断开其GSU变压器的情况下将发电机从服务中删除。实际上，从服务中删除发电机还涉及从服务中删除其GSU变压器。这种差异列出了在地磁干扰（GMD）事件期间模拟行为与系统观察之间的差异。本文介绍了有关2000个总线和24,000个总线系统的GMD案例研究，其中在跨场景中比较了反应性损失和地磁诱导的电流，在这种情况下，断开的GSU变形金刚是服务中的GSU变形金刚是服务中或服务不足。结果表明，当GSU状态不正确地建模时，反应性功率损耗的误差为3.2％至15.5％。还观察到和可视化了针对变压器中性GIC流的分支GIC流量最多95 A和450 A的差异。
In order to correctly model the impacts of geomagnetically induced current (GIC) flows, the generator step-up (GSU) transformer status must be properly modeled. In power flow studies, generators are typically removed from service without disconnecting their GSU transformers since the GSU transformer status has little to no impact on the power flow result. In reality, removing a generator from service involves also removing its GSU transformer from service. This difference presents a discrepancy between simulated behavior and system observations during geomagnetic disturbance (GMD) events. This paper presents GMD case studies on 2000-bus and 24,000-bus systems in which reactive power losses and geomagnetically induced currents are compared across scenarios in which the GSU transformers for the disconnected generators are either in-service or out-of-service. The results demonstrate a 3.2 to 15.5 percent error in reactive power losses when the GSU status is modeled incorrectly. Discrepancies of up to 95 A per phase for branch GIC flows and 450 A for transformer neutral GIC flows are also observed and visualized.
