摘要
配电网的高阻抗比特点使得传统的输电网快速解耦状态估计无法使用,且快速解耦状态估计无法处理配电网中大量存在的电流幅值量测,因而往往不满足可观性要求。为此,提出一种适应于配电网的交叉逼近状态估计方法,通过交叉迭代求解所有节点电压幅值的平方和所有支路两端的相角差,待收敛后再求解电压复相量。算例分析表明所提方法对高阻抗比的配电网具有很好的适应性,在满足计算精度要求的同时具有较高的计算效率。
The traditional fast decoupled state estimation method of transmission network cannot adapt to distribution network with high impedance ratio,and cannot deal with a lot of current magnitude measure?ments in distribution network,thereby it usually fails to meet the requirements of observability,for which,a CADSE(Cross Approximation Distribution State Estimation)method is proposed.The square of voltage amplitude of all nodes and the phase difference between two terminals of all branches are solved by cross iteration,and the voltage complex phasor is obtained after convergence.Cases analysis shows that the pro?posed method has good adaptability to the distribution network with high impedance ratio,and has high computational efficiency while satisfying the requirements of computational accuracy.
作者
王鹏
陈蕾
陈艳波
沈玉兰
肖湘宁
WANG Peng;CHEN Lei;CHEN Yanbo;SHEN Yulan;XIAO Xiangning(China Electric Power Research Institute,Beijing 100192,China;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310007,China;School of Electrical&Electronic Engineering,North China Electric Power University,Beijing 102206,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2019年第12期102-107,共6页
Electric Power Automation Equipment
基金
国家电网公司科技项目(基于营配融合的配电台区拓扑辨识、智能监测关键技术研究及工程示范)(SGZJ0000-KXJS1800382)~~
关键词
高阻抗比
电流幅值量测
配电网
状态估计
high impedance ratio
current magnitude measurement
distribution network
state estimation
