配电网孤岛划分的启发式方法

随着分布式电源(Distributed Generation, DG)的渗透性越来越强,提高配电网的自我修复能力是完善智能电网体系的重要环节,而电力孤岛划分是配电网自愈的核心技术。文中引入了含DG配电网的有根树模型,构建了孤岛划分问题的数学模型。基于配电网孤岛划分的主要原则,分析了负荷供电恢复路径的选择方法,创新性地提出了孤岛圈和供电恢复系数的概念,并在此基础上归纳出一套新的孤岛划分的启发式规则,提出了“缩圈法”这一新的孤岛搜索方法。通过仿真算例验证了该方法能更迅速有效地解决含DG配电网的孤岛划分问题。

A Heuristic method for island partition of distribution network

With the increasing permeability of distributed generation (DG), the self-healing function of smart distribution network will be a key to the construction of smart grid, and island partition will be a core technology of self-healing in distribution network. This paper firstly introduces the graph model of distribution network integrated with DGs, and builds the mathematical model of islanding problem. Then, based on the main principles of island division of distribution network, the method of selecting power supply path for load recovery is analyzed, and the concept of islanding circle and power supply recovery coefficient is innovatively proposed. On this basis, a new set of heuristic rules for island partition is summarized, and a new method for searching island called "circle-shrink method" is proposed. Finally, the simulation result shows that this method can solve island partitioning problem of distribution network integrated with DGs more quickly and effectively