摘要
提出了配电网安全域(DSSR)维度的概念及计算方法。首先,给出了DSSR维度的定义,综合考虑了DSSR边界约束个数及变量个数。其次,提出了一种基于主变压器联络关系向量的DSSR维度计算方法,该方法通过定义主变压器间的联络关系向量来体现网络结构特征,无需列写安全域表达式就能得到边界约束数及各约束中的变量数。最后,通过算例验证所提出的方法,初步分析得到了DSSR维度与配电网的关系,并归纳了边界数量取极值的条件。研究发现:对于不同规模的配电网,DSSR维度的大小受主变压器、馈线及分段开关数量的影响;对于规模相同的配电网,DSSR维度也可能不同,主要受主变压器间馈线联络方式的影响。提出的DSSR维度概念能严格地描述DSSR及对应的N-1安全性问题的规模,为DSSR安全理论提供了必要的基础。
The concept and calculation method of the dimension of distribution system security region （DSSR） are proposed. Firstly, the DSSR dimension is defined when the number of both constraints and variables are considered synthetically. Secondly, a DSSR dimension calculation method based on the main transformers connection vector is proposed. The key point in this method is to define a vector to describe the connection relationship among the main transformers and the DSSR dimension can be obtained without listing the security region expressions. Finally, an example is given to illustrate the proposed method. The relation between DSSR dimension and the distribution network is acquired by the preliminary analysis. The condition where the number of boundaries reaches the extreme value is also obtained. For different scale of distribution networks, the DSSR dimension is mainly affected by the number of transformers, feeders and sectionalizing switches. For the same scale of distribution networks, DSSR dimension may be different, and it is mainly affected by the connection modes of feeders. The concept of DSSR dimension proposed can rigorously describe the scale of DSSR and its corresponding N -- 1 security problems, which provides a necessary foundation for DSSR theory.
出处
《电力系统自动化》
EI
CSCD
北大核心
2018年第1期16-22,共7页
Automation of Electric Power Systems
基金
国家重点研发计划资助项目(2016YFB0900100)
国家自然科学基金资助项目(51477112)~~
关键词
配电网安全域
维度
边界约束
主变压器联络关系向量
distribution system security region
dimension
boundary constraint
main transformers connection vector
