基于改进汽车接力模型的电网分区方法  

Power Network Partitioning Method Based on Improved Automotive Relay

作　　者：徐玉琴[1] 李文帅[1] 赵蓓蓓[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北省保定市071000

出　　处：《电网技术》2016年第11期3546-3551,共6页Power System Technology

摘　　要：电网分区可简化网络结构,便于系统的监控与灵活调度,有效缓解区域电网短路电流超标的情况,是大电网发展的一个必然走向。提出一种基于改进汽车接力模型的新分区方法,首先结合图论中邻接矩阵等相关知识将电力网络图转化成拓扑结构图,将各站点、线路阻抗等效成停车站和路径,然后通过一定的运算法则寻找到距离初始站较近的站点。以500 k V/220 k V为例进行分析说明,由于分区后以高电压等级网架为主干网架,区域间通过联络线相连,故选取地区500 k V站点为初始站,最终可确定以每个500 k V变电站为支撑的电网分区。所提方法可以通过编程实现,且可多个分区同时进行,无需多次求解,可有效提高运算效率。最后,以IEEE 30节点标准算例和某地区实际电网为例,验证了所提方法的有效性和实用性。Network partition is utilized widely for simplifying network structure, facilitating system monitoring and scheduling and effectively alleviating situation of excessive short-circuit current in regional power grid. Therefore, network partition is an inevitable trend in development of large power grid. In this paper, power grid division method based on improved automotive relay is presented. Firstly, based on adjacency matrix and other related knowledge, power network is transformed into topology with nodes as stations and line impedance as path length. Secondly, according to certain rules, the sites near initial station can be found. 500 k V/220 k V is used as an example to illustrate the analysis. After partition, HV grid turns to backbone grid and the areas are interconnected with connecting lines, so 500 k V site is selected as initial station. Thirdly, grid partition supported by each 500 k V station can be determined. The proposed method can be implemented with programming and multiple partitions can be carried out simultaneously without repeated solving to improve computation efficiency. Finally, an IEEE 30 node system simulation is performed and a practical power grid is analyzed to demonstrate effectiveness and practicability of the algorithm.

关 键 词：电网分区 短路电流超标 主网架 改进汽车接力 

分 类 号：TM721[电气工程—电力系统及自动化]