计及分布式电源出力和负荷不确定性的配电网孤岛划分

发布时间：2018-06-17 05:02

本文选题：分布式电源 + 不确定性　；参考：《电力系统自动化》2015年14期

【摘要】：针对计及分布式电源(DG)出力波动性及负荷需求不确定性的配电网孤岛划分问题,提出了一种基于树背包理论的最优孤岛划分新模型及相应求解方法。所述方法的基本思路为:首先,构造了DG出力波动性和负荷需求不确定性基于树背包理论的随机最优孤岛划分新模型;进而,基于拉丁超立方超样方法、确定性树背包算法、数理统计方法,确定各初始孤岛的组成,包括DG及相应负荷节点;最后,对每个初始孤岛在考虑孤岛重构的基础上采用基于随机最优潮流的优化调整,通过优化调整而保证DG孤岛运行的最优性、安全性和经济性。所述方法实现了计及分布式发电及负荷出力不确定性情况下最佳孤岛的系统形成方法,能根据实时情况确定最大可能出现的孤岛,相对于在确定性条件下的孤岛具有更强的可信度。含有多个DG的PGE 69节点系统的算例验证了所述模型及算法的有效性。
[Abstract]:A new optimal islanding model based on tree knapsack theory is proposed to solve the islanding problem of distribution network considering the fluctuation of distributed power generation (DG) and uncertainty of load demand. The basic ideas of the proposed method are as follows: firstly, a new stochastic optimal island partition model based on tree knapsack theory is constructed for DG force fluctuation and load demand uncertainty, and then, based on Latin hypercube hypersample method, deterministic tree knapsack algorithm is proposed. The composition of each initial island, including DG and corresponding load nodes, is determined by mathematical statistical method. Finally, the optimal adjustment based on stochastic optimal power flow is adopted for each initial island based on the consideration of island reconstruction. The optimality, safety and economy of DG island operation are ensured by optimizing adjustment. The method realizes the system forming method that takes into account the uncertainty of distributed generation and load output, and can determine the largest possible isolated island according to the real-time situation. Compared with the island under deterministic conditions, it has stronger reliability. An example of PGE 69 bus system with multiple DG is given to verify the validity of the proposed model and algorithm.
【作者单位】：智能电网教育部重点实验室(天津大学);同济大学电子与信息工程学院;国网河南省电力公司经济技术研究院;
【基金】：国家自然科学基金资助项目(51177107)~~
【分类号】：TM732

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