一种提高并网风电系统实时运行灵活性的新型两阶段框架

IF 11 1区 工程技术 Q1 ENERGY & FUELS
Chunyang Lai, Behzad Kazemtabrizi
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引用次数: 0

摘要

风力-水力混合动力系统已被证明是一种可行的解决方案,有助于将可变风力发电整合到电网中。很少有研究考虑风电系统与电网的联合运行,更少有研究延伸到提高并网风电系统实时运行的灵活性,以减少风电和需求波动和不确定性增加时的减载。为了解决这一差距,提出了一个新的两阶段框架。在框架的第一阶段(F-first阶段),提出了一种基于场景的两阶段连接节点决策模型,以改善风电场、水电厂与需求之间的拓扑关系。在框架的第二阶段(F-second阶段),提出了一种两阶段双层柔性短缺风险规避模型,以动态降低实时运行中当前时段的减载,并缓解下一时段的柔性短缺风险。然后,嵌套一个双层资源节约模型来重新调度WHGS以节约资源。最后,将所有模型重新表述为milp。实例研究表明:(1)改善电厂与需求之间的拓扑关系,可以减少输电线路容量不足的影响,增强WHGS的灵活性;(2)实时灵活性改进模型可以提高WHGS的灵活性,最终在实时运行中减少减载(39.82% %)。在低输电能力(降低减载2.58 %)、低发电能力(降低减载7.93 %)、低置信水平(降低减载15.82 %)下均能有效运行;(3)置信水平的选择取决于情景条件和系统运营商的操作偏好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A novel two-stage framework to improve the flexibility of grid connected wind-hydro power system in real-time operation
The wind-hydro hybrid power system has been proven to be a viable solution in helping integrate variable wind power into the grid. While few studies consider the joint operation of the wind-hydro power system with the power grid, even fewer extend the research to improve the flexibility of the grid connected wind-hydro power system (WHGS) in real-time operation, aiming to reduce the load shedding in the face of increasing fluctuations and uncertainties from both wind power and demand. To address this gap, a novel two-stage framework is proposed. In the first stage of the framework (F-first stage), a scenario-based two-stage connection node decision model is proposed to improve the topology relationship between the wind power plant, hydropower plant and demands. In the second stage of the framework (F-second stage), a two-stage bilevel flexibility shortage risk averse model is proposed to dynamically decrease the load shedding during the current time period and mitigate flexibility shortage risks for the following time period in real-time operation. Then, a bilevel resource saving model is nested to reschedule the WHGS to conserve resources. Finally, all models are reformulated as MILPs. The case study shows that (1) improving the topology relationship between power plants and demands can decrease the impact of insufficient transmission line capacity and enhance the flexibility of WHGS; (2) the real-time flexibility improvement model can enhance the flexibility of WHGS and ultimately reduce load shedding (by 39.82 %) in real-time operation. It performs effectively even under low power transmission capacity (reducing load shedding by 2.58 %), low generation capacity (reducing load shedding by 7.93 %), and low confidence level (reducing load shedding by 15.82 %); (3) the choice of confidence level depends on the scenario conditions and operational preferences of the system operator.
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来源期刊
Applied Energy
Applied Energy 工程技术-工程:化工
CiteScore
21.20
自引率
10.70%
发文量
1830
审稿时长
41 days
期刊介绍: Applied Energy serves as a platform for sharing innovations, research, development, and demonstrations in energy conversion, conservation, and sustainable energy systems. The journal covers topics such as optimal energy resource use, environmental pollutant mitigation, and energy process analysis. It welcomes original papers, review articles, technical notes, and letters to the editor. Authors are encouraged to submit manuscripts that bridge the gap between research, development, and implementation. The journal addresses a wide spectrum of topics, including fossil and renewable energy technologies, energy economics, and environmental impacts. Applied Energy also explores modeling and forecasting, conservation strategies, and the social and economic implications of energy policies, including climate change mitigation. It is complemented by the open-access journal Advances in Applied Energy.
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