基于关键线路的输电断面识别  

Identification of Transmission Section Based on Key Lines

作　　者：徐岩[1] 郅静 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2016年第1期21-26,共6页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50777016);中央高校基本科研业务费专项资金资助项目(12MS110)

摘　　要：为提高电网实时监控水平,提出一种基于关键线路的输电断面识别方法。以功率灵敏度矩阵为基础,计算改进线路电气介数识别电网关键线路。以关键线路为主导线路,在其所属的潮流转移区域内搜索相应的输电断面。改进线路电气介数计算简单,符合实际电网潮流分布特点;将电网划分为多个潮流转移区域,并结合局部灵敏度计算法及稀疏向量技术,大幅度减少了搜索输电断面时的计算量;基于关键线路识别输电断面,避免了计算电网所有割集,同时保证了所得断面为在功率传输中起重要作用的关键断面。在IEEE39节点系统中对本文方法的正确性进行了验证。To improve the real-time monitoring level of power grid, an identification method of transmission section based on key lines is put forward. On the basis of the sensitivity matrix, the improved line electric betweenness is cal- culated to identify the key lines. Taking the key line as the main line, search the corresponding transmission section in the power flow transferring area which the key line belongs to. The improved line electric betweenness is simple to calculate and it conforms to the actual power flow distribution characteristics. Combined with the local sensitivity calculation method and sparse vector techniques, dividing the power grid into a number of power flow transferring areas reduces the amount of calculation greatly in the search of transmission section. Searching transmission section based on key lines avoids computing all the cut sets of power grid and guarantees that the obtained transmission sections play a key role in power transmission. The correctness of this method is verified in the IEEE39 bus system.

关 键 词：电力系统 输电断面 关键线路 改进线路电气介数 潮流转移区域 

分 类 号：TM711[电气工程—电力系统及自动化]