基于节点耦合距离的多直流馈入系统落点选取方法  

DC Dropping Location Selection in Multi-Infeed DC Transmission System Based on Node Coupling Distance

作　　者：蔡国伟[1] 史一明 郭小江[2] 韩奕[2] 杨德友[1] 

机构地区：[1]东北电力大学电气工程学院,吉林省吉林市132012 [2]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2016年第7期1962-1969,共8页Power System Technology

基　　金：国家电网公司科技项目(XT71-15-053);国家自然科学基金项目(51507028)~~

摘　　要：当多条直流落点到同一受端系统,密集的直流落点给电网的运行带来巨大挑战,因此合理安排直流落点位置对于电网安全稳定运行有重要意义。文章以多馈入交互影响因子为基础,定义了节点间耦合距离并通过聚类的方法将受端系统分成若干子区域。聚类结果表明同一子区中的节点交互影响作用强,不同子区域中的节点交互作用弱。每条直流选择一个子区域作为备选落点区域,所有可能方案构成落点方案集合,以多馈入短路比指标为目标,利用变权综合法评估落点方案。最后通过同一算例与已有筛选方法比较,分析结果表明本文所提方法具有一定的合理性与简便性,可应用于直流落点规划选址。When multiple DC links are connected to the same receiving-end system, dense DC dropping locations bring a challenge to power grid operation. It is important to arrange the locations reasonably for safe and stable operation of power grid. Based on multi-infeed interaction factor, this paper defined coupling distance between different nodes and divided receiving-end system into several sub-systems by clustering. The clustering result showed that interaction between nodes from the same sub-system was strong and interaction between nodes from different sub-systems was weak. Each DC took one sub-system as its alternative dropping area and all possible schemes constituted a scheme set. Then multi-infeed short circuit ratio was taken as objective and comprehensive variable weight method was used to evaluate dropping schemes. At last, compared with existing screening method for the same case, analysis shows that the proposed method in the paper is reasonable and simple, and can be applied in DC location planning.

关 键 词：多直流 受端系统 耦合距离 聚类 变权 筛选 

分 类 号：TM721[电气工程—电力系统及自动化]