对于美国的四十年水力发电再分析
Sean W D Turner1, Debjani Singh2, Carly Hansen2
1Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA. turnersw@ornl.gov.
Scientific data
|June 19, 2025
概括
RectifHydPlus数据集为美国工厂提供了增强的水电发电估计,包括水文控制和每日释放水的数据. 这改进了对水供应的历史分析.
科学领域:
- 水文学的水文学
- 能源系统 能源系统
- 气候科学 气候科学
背景情况:
- 现有的工业调查提供有限的每月水电发电数据,仅涵盖2003年以后的约10%的工厂.
- 之前的RectifHyd数据集为约1500个美国水电厂提供了水文一致的月度估计.
- 需要更全面和暂时解决的水电发电数据,包括水文影响.
研究的目的:
- 介绍RectifHydPlus,这是一个扩展和增强的数据集,基于RectifHyd.
- 为590座美国水力发电厂 (容量大于10兆瓦) 从1980年至2019年提供更新的历史月度发电估计.
- 引入水文控制数据集和每日释放水的时间序列,以分析水供应对发电的影响.
主要方法:
- 与RectifHyd相比,改进了代理信息和时间缩放方法.
- 开发一套水文控制数据集,以隔离水的可用性影响.
- 为每个水生成40年,每日分辨率,溢出调整的水释放时间序列.
主要成果:
- RectifHydPlus为590座水电厂 (1980-2019) 提供了更新的每月发电估计.
- 该数据集包括一个新的水文控制数据集,反映了历史气候变化.
- 每日分辨率,溢出调整的水释放数据可用于所有包括的水.
结论:
- RectifHydPlus提高了对受水资源供应影响的历史水电发电的理解.
- 该数据集支持在历史气候变化下分析当代舰队能力的应用程序.
- 为水电研究中的各种时间分辨率聚合需求提供细分数据.
相关概念视频
Fast Decoupled and DC Powerflow
303
The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
303
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
106
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
106
Control of Power Flow
318
There are several methods to control power flow in power systems:
318
Power in a Three-Phase Circuit
436
Three-phase systems have two configurations: the wye and delta. A star configuration can be three or four wires; in a delta configuration, the components are connected in a closed loop. Instantaneous power refers to the power value at a precise moment, and in a balanced three-phase system, it is constant. This is because the sum of the instantaneous powers in the three phases remains steady over time, despite individual fluctuations, due to the symmetry and phase relationship. The total...
436
The Power Flow Problem and Solution
348
Power flow problem analysis is fundamental for determining real and reactive power flows in network components, such as transmission lines, transformers, and loads. The power system's single-line diagram provides data on the bus, transmission line, and transformer. Each bus k in the system is characterized by four key variables: voltage magnitude Vk, phase angle δk, real power Pk, and reactive power Qk. Two of these four variables are inputs, while the...
348
Load-frequency control
268
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
268


