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【Applied Energy最新原创论文】数据驱动的建筑虚拟电厂热动态聚合

AEii国际应用能源  · 公众号  ·  · 2023-11-20 18:21

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原文信息

Data-driven aggregation of thermal dynamics within building virtual power plants

原文链接:

https://www.sciencedirect.com/science/article/pii/S0306261923014903

Highlights

(1) 建筑虚拟电厂中灵活性温控负荷的层级调度框架

(2) 用以提升模型精度的热动态非线性建模方法

(3)保证优化结果准确性和决策分解可行性的两阶段聚合策略

摘要

虚拟电厂(Virtual Power Plant, VPP)能够聚合灵活资源,为配电网络提供灵活调节服务。柔性建筑负荷,特别是温控负荷,具备很高的灵活调度潜力,是VPP重要的灵活资源种类。这项工作提出了一种数据驱动的方法,以克服建筑集群的热动态建模和聚合的一系列挑战。具体地,我们利用分段线性拟合技术量化不同输入特征向量对热动态(即室内温度变化)的影响,通过自适应调整模型阶次和确定断点位置,能够更加精确地提取热动态过程中的非线性关系。此外,我们将辨识的热动态模型转换为虚拟储能模型,并将其聚合到基于优化的VPP调度任务。我们提出的两阶段聚合策略,能够通过迭代更新运行域的功率边界,从而求解得到准确的调度决策结果,这种策略同时保证了决策分解的可行性,能够为每栋建筑生成单独的功率信号。实例仿真验证了所提方法面向海量分布建筑集群的热动态建模和聚合调度方面的准确性。


更多关于"Virtual power plant"的文章请见: https://www.sciencedirect.com/search?pub=Applied%20Energy&cid=271429&qs=virtual%20power%20plant

Abstr act

Virtual power plants (VPPs) possess the capability to aggregate flexible resources to provide grid services in the distributed network operation. The potential for flexibility utilization in building loads, particularly thermal-controlled ones, has drawn attention when aggregated into VPPs. This work proposes a data-driven approach to overcome the challenges in modeling and aggregation of thermal dynamics within clustered buildings. Specifically, we utilize piecewise linear equations to represent the impact of various input features on thermal dynamics (i.e., zone temperature variation), which is more precise in extracting the nonlinear relationship through adaptive model order adjustment and breakpoint determination. Additionally, we transform the identified thermal dynamic process into virtual storage models and aggregate them into the optimization-based system dispatch process. The proposed two-stage aggregation approach facilitates the determination of accurate dispatch decisions by iteratively updating the power bounds of flexibility regions. It ensures disaggregation feasibility simultaneously to generate individual power signals for each building. Case simulations verify the accuracy of the proposed method on modeling and aggregation of thermal dynamics within clustered buildings.


Keywords:

Virtual power plants

Building thermal dynamics

Aggregated model

Piecewise linearization

Graphics

图1 建筑虚拟电厂运行框架


图2 柔性楼宇HVAC系统温度调节示意图


图3 两阶段的温控负荷聚合策略








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