摘要
简述了目前常用的配电状态估计算法,分析比较了这些算法各自的优缺点。针对配电系统 量测的特点,提出一种配电系统状态估计的区域解耦算法,将配电网中各馈线分解成多个量测区 域,使得分解后的各个区域之间解耦,即可以对各个区域单独进行状态估计。该算法无需利用配网 辐射特性或者放弃某些实时量测,就可以大大减小计算规模,加快计算速度,因此能充分利用各种 量测,还可以应用于弱环网配电系统。理论分析和算例结果表明,所提出的方法高效可行,适合当 前配电系统在线应用的实际要求。
A new technology of area-decoupled state estimation is presented for distribution systems. Various famous state estimation methods are discussed first and then the area-decoupled version. Owing to the characteristics of modern measuring sets, the idea of this method is to decompose the WLS (weighted-least-square) problem of a feeder into WLS sub-problems of a series of zones which are area-decoupled. The feature of this method is that it can greatly reduce the scale of calculation without being limited by the radial network. Theoretical analysis and digital test results show that the area-decoupling method is highly efficient and practical for distribution systems state estimation.
出处
《电力系统自动化》
EI
CSCD
北大核心
2005年第6期79-83,共5页
Automation of Electric Power Systems
关键词
配电系统
状态估计
伪量测
区域解耦
distribution systems
state estimation
pseudo measurement
area-decoupled
