使用基于变压器的框架进行太阳耀斑的操作预测
Yasser Abduallah1,2, Jason T L Wang3,4, Haimin Wang1,5,6
1Institute for Space Weather Sciences, New Jersey Institute of Technology, University Heights, Newark, NJ, 07102-1982, USA.
Scientific reports
|August 22, 2023
概括
太阳耀斑是影响技术的太阳爆炸. 一个新的基于变压器的AI,SolarFlareNet,准确地预测太阳耀斑 (M5.0,M,C类) 提前24-72小时,帮助太空天气准备.
科学领域:
- 太阳物理 太阳物理
- 太空天气 太空天气
- 机器学习 机器学习
背景情况:
- 太阳耀斑是来自太阳活跃区域 (ARs) 的突然能量释放.
- 这些事件,以及冠状质量喷射,导致太空天气,破坏无线电通信和电网等技术.
- 准确的太阳耀斑预测对于灾害风险管理和技术准备至关重要.
研究的目的:
- 开发和介绍SolarFlareNet,这是一个基于变压器的框架,用于预测太阳耀斑.
- 预测活动区域在24至72小时内产生M5.0,M或C级火焰的可能性.
- 通过先进的机器学习来增强太空天气预报能力.
主要方法:
- 利用基于变压器的深度学习架构 (SolarFlareNet) 以时间序列来建模太阳能活跃区域数据.
- 训练了三个单独的变压器,每一个都专门用于预测特定的太阳耀斑类别 (M5.0,M,C).
- 包含来自空间天气HMI主动区域补丁 (SHARP) 的磁性参数和来自NCEI火焰目录的火焰数据 (2010年5月 - 2022年12月).
主要成果:
- 开发了一个完全可操作的SolarFlareNet系统,能够近乎实时进行太阳耀斑预测.
- 成功建模了太阳能活跃区域数据中的时间动态,使用变压器提高了预测准确度.
- 将预测模型扩展到基于校准的概率预测方法.
结论:
- 太阳耀斑网 (SolarFlareNet) 提供了重要的太阳耀斑的准确,早期预测,对于减轻太空天气影响至关重要.
- 基于变压器的方法有效地捕捉了太阳活动数据中复杂的时间模式.
- 该系统的运行状态和网络可访问性使其能够实现近乎实时的太空天气监测和预报.
相关概念视频
Energy Losses in Transformers
901
In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary winding. However, in reality, the transformers always have some energy losses, and, hence, the output power obtained at the secondary winding is less than the input power at the primary winding due to energy losses.
There are four main reasons for energy losses in transformers.
The first cause can be the high resistance of the...
There are four main reasons for energy losses in transformers.
The first cause can be the high resistance of the...
901
Power System Three-Phase Short Circuits
109
Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...
109
Transformers
1.1K
A device that transforms voltages from one value to another using induction is called a transformer. A transformer consists of two separate coils, or windings, wrapped around the same soft iron core. However, they are electrically insulated from each other.
The iron core has a substantial relative permeability. Therefore, the magnetic field lines generated due to the current in one winding are almost entirely confined within the core, such that the same magnetic flux permeates each turn of both...
The iron core has a substantial relative permeability. Therefore, the magnetic field lines generated due to the current in one winding are almost entirely confined within the core, such that the same magnetic flux permeates each turn of both...
1.1K
Three-Winding Transformers
260
Three identical single-phase transformers can be configured to form a three-phase transformer connection, which involves high-voltage and low-voltage windings. The high-voltage windings are denoted by capital letters A-B-C, while the low-voltage windings are labeled with lowercase letters a-b-c, representing their respective phases. This notation helps distinguish between the high and low voltage sides of the transformer.
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
260
Equivalent Circuits for Practical Transformers
465
The practical equivalent circuits of single-phase two-winding transformers exhibit significant deviations from their idealized versions due to the inherent properties of winding resistance and finite core permeability. These properties result in real and reactive power losses, affecting the transformer's performance. Understanding these deviations is crucial for designing more efficient transformers.
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
465
Calculation of Electric Flux
1.8K
Consider the electric field of an oppositely charged, parallel-plate system and an imaginary box between those plates. Let the bottom face of the box be ABCD, and the top face be FGHK. The electric field between the plates is uniform and points from the positive plate toward the negative plate. The calculation of this field's flux through the box's various faces shows that the net flux through the box is zero. Why does the flux cancel out here?
1.8K


