摘要
电网分区可简化安全分析、运行监视和调度控制,具有十分广泛的工程应用。基于场论,提出了一种可自动确定分区个数的电网分区方法。从电力网络节点间的相互影响及影响的分布特性出发,借鉴物理学中场与势的概念定义了用于描述节点影响力和节点所受影响的负荷电流虚拟场与负荷电流虚拟势,以势值的大小来衡量节点间联系的紧密程度,将分区看作为势值由中心向边界辐射衰减的连通区域,通过搜索被势值低洼区所分割的高势值连通区来实现对电网的分区。IEEE 39节点标准算例和某省网实际算例的结果验证了所提方法的有效性和实用性,所提方法能够克服已有方法无法自动确定出分区数目的不足。
In electrical industry, network partition is utilized widely for simplifying security analysis, operation monitoring and dispatching control. A field theory-based algorithm for partitioning power networks is proposed. The load current virtual filed is defined to represent the node＇s influence on the rest of nodes in the network. The load current virtual potential is formulated to quantify the extent that the node is affected by the other nodes in the network. Considering the property of short-range filed the load current virtual potential is applied to reflect the connection denseness in the area surrounding the node. The network with zonal structure can be viewed as a graph composed of several local high potential areas demarcated by low potential nodes. By detecting those connected groups of nodes with high potential, the partition result of the power network can be got. The experiments on a benchmark and a real-world provincial power grid show that the algorithm can discover the intrinsic zonal structure in power networks and has an advantage over the existing methods in settling the number of partitions autonomously.
出处
《电网技术》
EI
CSCD
北大核心
2015年第4期1039-1044,共6页
Power System Technology
基金
国家自然科学基金项目(51261130472
51207098)~~
关键词
电网分区
等效因子矩阵
短程场
负荷电流虚拟势场
层次聚类
power networks partition
equivalent factor matrix
short-range field
load current virtual potential field
hierarchical clustering
