基于电压相量轨迹几何特征的电网节点时空关联特性评估  

Grid Bus Spatio-temporal Linkage Assessment Based on Geometric Characteristics of Voltage Phasor Trajectories

作　　者：郑恒峰 刘道伟 李柏青 杨红英 李宗翰 赵高尚 李京 杨少波 ZHENG Hengfeng;LIU Daowei;LI Baiqing;YANG Hongying;LI Zonghan;ZHAO Gaoshang;LI Jing;YANG Shaobo(China Electric Power Research Institute,Haidian District,Beijing 100192,China;School of Electrical Engineering,Northeast Dianli University,Jilin 132012,Jilin Province,China)

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

出　　处：《电网技术》2020年第1期9-18,共10页Power System Technology

基　　金：国家重点研发计划项目(2018YFB0904500)~~

摘　　要：随着电网运行环境的复杂性、随机性日益加剧,实现基于广域量测信息的电网节点关联特性实时评估具有重要现实意义。该文首先对实测电压相量轨迹信息几何特征进行挖掘,定义表征轨迹特性的“轨迹距离”概念;继而构建表征电压相量轨迹运动演进规律的特征平面,并据此构建动态收敛域以评估节点关联性强度;最后,提出基于轨迹距离密度的参数自适应轨迹聚类算法,衡量各节点电压运动趋势的相似性关系,从而实现特定节点的关联范围评估。对IEEE 39节点系统的仿真,验证了所提方法的有效性。Increasing complexity and randomness of grid operation environment make it more practically significant to realize real-time linkage assessment of grid buses based on wide-area measurement information.In this paper,firstly,the geometric characteristics of measured voltage phasor trajectory information are excavated,and a new definition of the trajectory distance fully representing the trajectory characteristics is proposed.Then,a motion characteristic flat fully reflecting the motion of the voltage phasor trajectory is constructed.Based on this,a dynamic convergence zone is constructed to realize assessment of linkage strength.Finally,a parameter-adaptive trajectory clustering algorithm based on distance density is proposed to observe similarity of voltage motion trends of buses,so as to achieve assessment of the linkage range of specific bus.Simulation on IEEE 39-bus system verifies effectiveness of the proposed method.

关 键 词：电压相量轨迹 信息驱动 节点关联特性 轨迹聚类 

分 类 号：TM721[电气工程—电力系统及自动化]