基于趋势理论的源—网—荷协调性控制
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田皓(1992-),男,硕士研究生,主要从事电力系统稳定分析与控制研究;E-mail:754181929@qq.com

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国家自然科学基金(52077009);湖南省教育厅重点项目(20A013)


Source-grid-load coordination analysis based on trend theory
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    摘要:

    针对电网不同运行方式下的源—网—荷协调性存在差异问题,提出基于趋势理论的源—网—荷协调性的辨识和控制方法。首先,利用方向导数证明电网的整体功角安全性指标与路径负载均衡度同趋;通过电网运行均衡度和路径负载均衡度之间的差异分析,引出电网可能存在源—网—荷不协调的观点;然后,基于电网的映射弹性网模型对局部电网进行物理分析,再通过数学工具对其进行奇异值分析,得出雅可比矩阵的最小奇异值和发电出力或负荷是同趋关系;最后,提出源—网—荷协调性的辨识和控制方法。采用IEEE9节点系统验证整体功角安全性指标与路径负载均衡度同趋,而与电网运行均衡度无关;采用IEEE39节点系统验证源—网—荷协调性控制方法的合理性。该研究通过跟踪大电网实时运行数据,提出在不同运行方式下的源—网—荷协调性的控制方法。

    Abstract:

    Considering the differences between the source-grid-load coordination in different operation modes of power grids, a source-grid-load coordination identification and control method are proposed in this paper based on trend theory. Firstly, the directional derivative is used to investigate the relationship between the overall power angle safety index and the load balance degree of the grid. According to the difference analysis between the equilibrium of power grid operation and the load balance degree of path, the imbalance between source-grid-load can be identified. Then, based on mapping elasticity potential energy model of power grids, the physical analysis of local grid can be performed. It is found that the minimum singular values of the Jacobian matrix and the output or load of power generation have the same trend. Finally, a source-grid-load coordination identification and control method are proposed. The IEEE 9-bus system is selected to verify the theorical result that the overall power angle security index and the path load balance have the same trend and has no relationship with the balance of power grid operation. The IEEE 39-bus system is used to verify the effectiveness of the source-grid-load coordination control method.

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田皓,谭浩.基于趋势理论的源—网—荷协调性控制[J].电力科学与技术学报,2021,(2):132-141. Tian Hao, Tan Hao. Source-grid-load coordination analysis based on trend theory[J]. JOURNAL OF EIECTRIC POWER SCIENCE AND TECHNOLOGY,2021,(2):132-141.

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  • 在线发布日期: 2021-05-08